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1. 26 5 4 3 Power Factor Correction 28 5 4 4 Phase Geouence enn 28 5 5 CONTROL CONNECTIONS 29 5 5 1 Control Supply for Fans and Electronics 29 5 5 2 Digital INputs 000 tes oe a aie ae Bea a oy ete bet ed 30 5 5 3 Relay Outputs ice ska eke wees EE EE 33 5 6 SAMPLE APPLICATION CONNECTIONS 35 5 6 1 Sample Application 1 35 5 6 2 Sample Application 2 37 5 6 3 Sample Application 3 38 5 6 4 Sample Application 4 40 57 FINAL ASSEMBLY oi he EA da A A AAA AAA 41 SECTION 6 FIRST TIME POWER UP 6 31 START UP CHECKS n eerte eite a alla ae KA 45 6 2 COMMISSIONING CHECK PROCEDURE 45 Page ii 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Table of Contents SECTION 7 LST STARTER CONFIGURATION 7 1 INTRODUCTION ie eege deet RO eh as 47 7 2 DIP SWITCH CONPIGUDATION 0 00 0 ee eee 47 7 2 1 Soft Stop Ramp Time 47 7 2 2 Phase Sequence Protection 48 T23 Start G rrent eeclesie ee oe e Venetis pps 48 7 2 4 Motor Nameplate FLC 48 7 3 CUSTOMIZING LST
2. 331 mm 13 0 inches 715mm 0 6 inches 308 5 mm 12 1 inches Figure 26 LST Models Rated 158 Amps or Greater 1276A 1E 9812 O 1998 TB Wood s All Rights Reserved Page 71 Appendix B Removal of Enclosure Extension NOTES Page 72 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Ee 1998 TB Wood s All Rights Reserved LAN TBWood s Corporate Office TB Wood s Incorporated http www tbwoods com 440 North Fifth Avenue e mail info Otbwoods com Chambersburg Pennsylvania 17201 1778 Telephone 888 TBWOODS or 717 264 7161 FAX 717 264 6420 Distribution Centers ATLANTA CHICAGO LOS ANGELES Phone 888 TBWOODS Phone 847 439 3788 Phone or Fax 800 451 1110 Fax 717 264 6420 Fax 847 439 0478 CHAMBERSBURG DALLAS PORTLAND Phone 888 TBWOODS Phone 214 637 0850 Phone or Fax 800 451 1110 Fax 717 264 6420 Fax 214 637 0867 Canada T B Wood s Canada Ltd e mail infoca tbwoods com 750 Douro Street Stratford Ontario Canada N5A 6V6 Telephone 519 271 5380 FAX 519 271 3094 Distribution Centers EDMONTON MONTREAL STRATFORD Phone 403 439 7979 Phone 514 332 4812 Phone 519 271 5380 Fax 403 439 7661 Fax 514 332 6842 Fax 519 271 3094 Mexico Plant Engineering Consultants PEC TB Wood s M xico S A de CA Wholly Owned Subsidiary Oriente 237 No 171 521 Airport Rd Colonia Agr cola Oriental Chattanooga TN 37421 08500 M xico D F Phone
3. Light Duty Medium Duty Heavy Duty Model 300 FLC for 10 sec 300 FLC for 30 sec 450 FLC for 30 sec 40 C 45 C 40 C 45 C 40 C 45 C 104 F A 113 F A 104 F A 113 F A 104 F A 113 F A LST90130B 12 12 12 11 8 8 LST90250B 24 22 22 21 16 15 LST90340B 31 29 28 27 21 20 LST90390B 36 34 33 31 24 23 LST90550B 54 51 52 49 36 35 LST90730B 70 66 66 63 47 45 LST90800B 77 73 73 70 52 49 LST91260B 115 110 105 100 78 74 LST91360B 126 120 116 110 84 80 LST91580B 154 147 148 142 104 99 LST91930B 188 180 180 173 128 123 LST92230B 217 208 207 198 146 140 LST92640B 256 246 244 235 173 167 LST93720B 352 335 328 312 235 224 Table 4 90 Duty Cycle Off Time 35 seconds 10 Starts per Hour Light Duty Medium Duty Heavy Duty Model 300 FLC for 10 sec 300 FLC for 30 sec 450 FLC for 30 sec 40 C 45 C 40 C 45 C 40 C 45 C 104 F A 113 F A 104 F A 113 F A 104 F A 113 F A LST90130B 12 11 11 11 8 8 LST90250B 23 22 21 20 16 15 LST90340B 29 28 27 26 21 20 LST90390B 34 32 31 30 24 23 LST90550B 53 50 51 48 36 34 LST90730B 68 65 65 62 46 44 LST90800B 75 71 71 68 51 49 LST91260B 109 104 101 96 75 71 LST91360B 120 115 111 106 82 78 LST91580B 151 144 146 139 103 98 LST91930B 185 178 178 171 127 121 LST92230B 213 203 204 196 145 138 LST92640B 251 242 240 231 171 165 LST93720B 340 324 318 303 230
4. Page 18 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 4 Receiving and Installation 4 1 Handling WARNING HANDLING HAZARD Keep the area below any equipment being lifted clear of all personnel and property Failure to observe this instruction can result in death serious injury or equipment damage AVERTISSEMENT RISQUE LORS DE LA MANUTENTION Assurez vous qu il n y a personne ni mat riel sous l appareil en train d tre lev Si ces pr cautions ne sont pas respect es cela peut entrainer la mort des blessures graves ou des dommages mat riels Do not remove the LST Solid State Starter from its packaging until it is at the final installation site The LST starter is packaged to be protected from the hazards of shipping and is best protected in its original shipping packaging 4 2 Preliminary Inspection Before storing or installing the LST starter thoroughly inspect the device for possible shipping damage Upon receipt 1 Remove the starter from its package and inspect the exterior for shipping damage If damage is apparent notify the shipping agent and your sales representative 2 Remove the cover and inspect the starter for any apparent damage or foreign objects Ensure that all mounting hardware and terminal connection hardware is properly seated securely fastened and undamaged 3 Read the technical data label affixed to the starter and ensure that the correct horsepower
5. A 104 F A 113 F A LST90130B 13 12 12 12 9 8 LST90250B 25 24 23 22 17 16 LST90340B 34 33 31 30 23 22 LST90390B 39 37 36 34 26 25 LST90550B 55 53 53 51 37 35 LST90730B 73 69 69 66 48 46 LST90800B 80 77 76 72 53 51 LST91260B 126 120 114 108 82 78 LST91360B 136 130 124 118 88 84 LST91580B 158 151 152 145 106 101 LST91930B 193 185 184 177 130 124 LST92230B 223 213 212 204 149 143 LST92640B 264 255 251 242 176 170 LST93720B 372 355 344 328 243 231 Table 2 70 Duty Cycle Off Time 108 seconds 10 Starts per Hour Light Duty Medium Duty Heavy Duty Model 300 FLC for 10 sec 300 FLC for 30 sec 450 FLC for 30 sec 40 C 45 C 40 C 45 C 40 C 45 C 104 F A 113 F A 104 F A 113 F A 104 F A 113 F A LST90130B 12 12 12 11 9 8 LST90250B 24 23 23 22 16 16 LST90340B 33 31 30 28 22 21 LST90390B 37 35 34 32 25 24 LST90550B 55 52 52 50 37 35 LST90730B 71 68 68 64 48 45 LST90800B 79 75 74 71 53 50 LST91260B 121 115 110 104 80 76 LST91360B 131 125 120 114 86 82 LST91580B 156 149 150 143 105 100 LST91930B 190 183 182 175 129 124 LST92230B 219 210 210 201 148 142 LST92640B 260 251 248 239 175 168 LST93720B 362 346 336 321 239 228 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 5 Section 2 Technical Characteristics Page 6 Table 3 80 Duty Cycle Off Time 73 seconds 10 Starts per Hour
6. Figure 20 shows the wiring connections for this sample application Installation procedure 1 Connect line voltage to the LST starter s terminals L1 1 L2 3 L3 5 2 Connect the motor to the starter s output terminals T1 2 T2 4 T3 6 3 Connect the control voltage to the starter s PT input control power terminals see Figure 16 on page 35 4 Connect control circuitry as shown in Figure 20 5 The performance of the LST starter may be adjusted using the DIP switch See page 47 for configuring the DIP switch and page 49 for fine tuning the performance of the starter 3 PHASE LEGEND 50 60 Hz SUPPLY A FAULT RELAY N O CONTACT START STOP CONTROL CONTACT RESET PUSHBUTTON For control voltage options see Figure 16 on page 35 Le O O O o L1 1 L2 3 L3 5 Al A2 A3 C23 C24 C31 C32 C41 C42 C53 C54 l r START STOP RESET AUX TRIP INPUT MOTOR LOCAL TRIP THERM REMOTE RUN wc IT1 2T2 4 T3 6 B4 B5 C63 C64 23 24 41 42 44 13 14 O O O o o o o o o o Y TO MOTOR Figure 20 Wiring Connections for Sample Application 4 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections Notes The motor may be started and stopped via the remote two wire control circuit Closing the S1 contact initiates a start by applying power to the motor opening the S1 contact causes the starter to initiate a stop or soft stop if so configured Operation of the undercurrent relay wi
7. HAZARDOUS VOLTAGE Read this manual in its entirety before connecting and commissioning this equipment Troubleshooting and repair of this equipment must be performed only by qualified personnel Ensure that the LST Solid State Starter is completely isolated from the power supply before attempting any work on the unit Failure to observe these instructions will result in death or serious injury A DANGER TENSION DANGEREUSE Lisez tout ce manuel avant de raccorder ou de mettre en service cet appareil Seul du personnel qualifi doit faire le d pannage et la r paration de cet appareil Assurez vous que le d marreur transistoris LST est totalement isol de l alimentation avant d y travailler Si cette directive n est pas respect e cela entrainera la mort ou des blessures graves Introduction Abnormal conditions are generally indicated by the LEDs for starter status on the front of the LST starter see Figure 3 on page 11 This section approaches troubleshooting by providing tables based on the condition of the status LEDs and the phase LEDs In addition more generalized abnormal conditions are also discussed Conditions Indicated by Status LEDs If the Trip LED on the front of the starter is flashing which indicates that the starter has tripped due to a fault condition also check the status of the three phase LED indicators If the three LEDs are not all illuminated or if they do not glow with equa
8. If both Stop and Reset are open the starter immediately stops and enters the Off mode Soft Stop mode In the Soft Stop mode the starter s microprocessor monitors the Start Stop and Reset inputs a Ifthe stop time parameter is zero the starter immediately enters the Off mode b If both Stop and Reset are open the starter immediately stops and enters the Off mode C If both the Stop and Reset inputs are closed the starter enters the Start mode d As the output voltage approaches zero the starter enters the Off mode Trip mode Page 32 In Trip mode the starter s microprocessor monitors the Reset input In Trip mode SCR conduction is inhibited If the Reset input is closed the starter enters the Off mode 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections 5 5 3 Relay Outputs The LST starter has three relay outputs Run Form A Main Contactor Control Form A Trip Form C Contacts are rated for 5 A 250 Vac 360 VA or 5 A 30 Vdc resistive Figure 3 on page 11 shows the location of the relay outputs Table 11 below describes the relay outputs and Table 12 on page 34 provides an overview of the operation of the outputs Figure 15 on page 34 illustrates how the three relay outputs Main Contactor M C Run and Trip behave during normal starter operation Relay Output Main Contactor 13 14 Table 11 Relay Outputs for the LST Starter Description
9. L1 1 pour vous assurer qu il n y a pas de tension ca Assurez vous que le d marreur transistoris LST est totalement isol de l alimentation ayant d y travailler Assurez vous que l armoire ne contient pas d barbures ni d autres d bris N appliquez pas la tension aux bornes d entr e num rique du d marreur Ce sont des entr es actives 12 24 Vcc qui doivent tre command es par des contacts secs seulement Ne raccordez pas les condensateurs de correction du facteur de puissance la sortie du d marreur transistoris LST Lorsque la correction statique du facteur de puissance est utilis e elle doit tre reli e au c t alimentation du d marreur Si vous installez un d marreur transistoris LST dans une armoire non ventil e utilisez un contacteur de d rivation pour viter l accumulation de chaleur excessive Si vous installez un contacteur de d rivation assurez vous que les raccordements de phase sont ad quats passant par le contacteur entre L1 1 et T1 2 L2 3 et T2 4 L3 5 et T3 6 Si ces pr cautions ne sont pas respect es cela peut entrainer la mort des blessures graves ou des dommages mat riels Page 44 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 6 First Time Power Up 6 1 Start Up Checks Before operating the LST starter perform the following start up checks 1 Ensure that the correct model has been supplied as ordered for your application Inspect the starter
10. 219 1998 TB Wood s All Rights Reserved 1276A 1E 9812 2 3 2 Bypassed Operation Table 5 2 5 Starts per Hour Light Duty 300 FLC for 10 sec Section 2 Technical Characteristics Medium Duty 300 FLC for 30 sec 450 FLC for 30 sec Heavy Duty Model 40 C 45 C 40 C 45 C 40 C 45 C 104 F A 113 F A 104 F A 113 F A 104 F A 113 F A LST90130B 14 14 14 13 10 9 LST90250B 31 30 29 28 20 19 LST90340B 47 45 44 42 30 29 LST90390B 52 50 48 46 33 32 LST90550B 59 56 57 54 39 37 LST90730B 79 76 75 72 52 49 LST90800B 88 84 83 80 57 55 LST91260B 160 153 144 138 99 95 LST91360B 160 153 145 139 100 95 LST91580B 166 159 160 153 110 195 LST91930B 202 194 194 187 135 139 LST92230B 237 227 226 218 157 150 LST92640B 282 272 269 259 186 179 LST93720B 418 400 387 370 266 254 Table 6 10 Starts per Hour Light Duty Medium Duty Heavy Duty Model 300 FLC for 10 sec 300 FLC for 30 sec 450 FLC for 30 sec 40 C 45 C 40 C 45 C 40 C 45 C 104 F A 113 F A 104 F A 113 F A 104 F A 113 F A LST90130B 14 14 13 13 9 9 LST90250B 30 29 27 26 18 18 LST90340B 45 43 39 37 26 25 LST90390B 50 47 43 41 30 28 LST90550B 59 56 56 53 38 37 LST90730B 79 75 73 70 50 48 LST90800B 87 83 81 77 56 53 LST91260B 155 148 133 127 91 87 LST91360B 157 150 138 132 95 90 LST91580B 165 15
11. 800 437 3311 or 423 892 7654 Mexico Fax 423 894 0495 Telephone 5 558 16 20 Fax 5 756 06 74 e mail ventas tbwoods com Other TB Wood s Manufacturing Locations Greensboro NC Mt Pleasant MI San Marcos TX Scotland PA Trenton TN Marienheide Germany Naturno Italy Bangalore India Authorized Distributors Worldwide
12. All Rights Reserved Page 55 Section 8 Troubleshooting Table 18 DOL or Uncontrolled Start Possible Cause Incorrectly installed power factor correction capacitors D Action Power factor correction PFC capacitors if used must be connected to an input terminal of the LST starter or damage may result Ensure that PFC capacitors are not connected to the output terminals of the starter If a PFC capacitor is connected to the output disconnect it and re connect it to an input terminal CTs not connected For all LST models except the three largest models if the starter is bypassed during Run the CTs must be removed from their internal position and mounted in the enclosure extension to preserve protective features Check that the CTs were positioned correctly so that they would monitor the current from either the LST or the bypass contactor For the three largest LST models the CTs are already correctly positioned in the enclosure extension and so should not cause a DOL or uncontrolled start Damaged SCRs or firing circuit Page 56 To test for a damaged SCR perform the Resistance Test to verify the Off state resistance of the thyristors If the power section of a thyristor fails it usually fails due to a short circuit The Resistance Test is as follows For an installation with an earthed neutral apply three phase input power to the starter in the Off state and then measure the voltage between the out
13. Diagnostic Indicators 12 3 4 TERMINALS iii ki bead pata ad ee 13 3 5 PROTECTIVE FEATURES iii ua 13 3 5 1 Auto Configuration 13 3 5 2 Prestart Circuit Analysis and Configuration 14 8 5 3 Phase Loss and Phase Sequence Protection 15 3 5 4 Electronic Shearpin Protection 15 3 5 5 Motor Overload Protection 15 3 5 6 Thermistor Protection 16 3 5 7 Auxiliary Trip Protection 16 3 6 THE UNI START FEATURE esse nn 16 3 7 THE UNI STOP FEATURE ANEREN a a 18 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page i Table of Contents SECTION 4 RECEIVING AND INSTALLATION 41 HANDEING AL sages et As 19 4 2 PRELIMINARYINSPECTION 19 4 3 MOUNTING PRECAUTIONS 20 4 4 MOUNTING IN VENTILATED ENCLOSURES 21 4 5 MOUNTING IN NON VENTILATED ENCLOSURES 22 SECTION 5 CONNECTIONS SA INTRODUCTION HE 23 5 2 POWER CONNECTIONS 24 53 FUSE SELECTION ANA ge GR EG UR ee PA aL A 24 5 4 MOTOR CONNECTION occccccccc teen ee 25 5 4 4 Line Contactors ze sota to bale Medal oe ew mena 25 5 4 2 Bypass Contactors
14. Improved soft start and soft stop of motor and load Reduced starting current Motor thermal modeling Phase sequence phase loss electronic shearpin and motor thermistor protection In addition installation commissioning and maintenance are simplified by the LST starter s many other sophisticated functions which enhance performance and reliability and which make the equipment suitable for optimizing nearly all motor starting applications These functions include Automatic analysis and configuration of motor connection phase sequence supply voltage and frequency e Uni Start soft start Current Limiting Tripoutput Form C contacts Line contactor control Bypass contactor control e Uni Stop soft stop e Simple accurate and repeatable programming procedures Diagnostic fault display Models Currently Available A wide range of LST Solid State Starter models are currently available The models range from 13 to 372 amps for 200 to 600 Vac Section 2 1 on page 3 provides more information about the models by detailing the information contained in the model number 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 1 Section 1 Introduction 1 3 1 4 1 5 Page 2 Scope of This Manual This manual contains specifications receiving and installation instructions configuration description of operation and trouble shooting procedures for the LST Solid State Starter Related
15. NEMA 1 1P23 protection as standard This is achieved by utilizing an enclosure extension that encloses the wiring connections and makes them finger safe If desired the enclosure extension may be removed resulting in IPOO protection and making the LST starter suitable for mounting in an enclosure Figure 24 below shows how the enclosure extension fits together Figures 25 and 26 on the next two pages provide the dimensions of the LST starter without the enclosure extension Chassis Figure 24 The LST Starter Enclosure Extension 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 69 Appendix B Removal of Enclosure Extension 18 mm 18 mm 0 7 in 0 7 in 7 5 mm 206 mm 8 1 inches 0 3 in 170 mm 6 7 inches Ka S trAC ws LST U RUN o Soft Starter CONTROL INPUT STATUS TB Wood s T 3 e elela css ces ces s s d Dimension A mm inches 180 7 1 250 9 8 831 mm 13 0 inches 808 5 mm 12 1 inches 15 mm 0 6 inches LST Model LST90130B LST90250B LST90340B LST90390B LST90550B LST90730B LST90800B LST91260B LST91360B Figure 25 LST Models Rated 136 Amps or Less Page 70 O 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Appendix B Removal of Enclosure Extension 295 mm 11 6 inches 1 382 mm 15 0 inches 4 16 mm 0 6 in N 5m 16 mm 0 3 in 0 6 in 350 mm 13 8 inches
16. STARTER PERFORMANCE 49 7 3 1 Accessing the Potentiometers 49 7 3 2 Adjusting the Potentiometers 50 SECTION 8 TROUBLESHOOTING 8 1 INTRODUCTION c dee Le Leu Deeper inis rs 51 8 2 CONDITIONS INDICATED BY STATUS LEDS 51 8 3 ABNORMAL MOTOR PERFORMANCE 55 SECTION 9 WARRANTY INFORMATION 9 1 HASSLE FREE WARRANTY 4 44 44 42 22 24 59 9 2 PROCEDURE FOR REPAIRS 59 APPENDIX A REPOSITIONING CTs FOR BYPASS OPERATION 61 APPENDIX B REMOVAL OF THE ENCLOSURE EXTENSION 69 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page iii Table of Contents Er Page iv 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 1 Introduction 1 1 1 2 Product Overview TM The LST Solid State Starter is another member of the S trAC family of soft start controllers It is microprocessor based and provides start and stop control as well as motor protection Models arrive from the factory with NEMA 1 IP23 protection although the enclosure extension may be removed to provide IP00 protection thus making the LST starter suitable for mounting in another enclosure See Appendix B on page 69 for information on removing the enclosure extension In operation LST models provide
17. Wire Control In a two wire non latching circuit the start input is shorted to 24 Vdc and the starter is controlled by closing and opening the Stop input Contacts used for controlling this input should be low voltage low current rated Gold Flash or similar Stop C31 C32 Active 24 Vdc Hard contact circuit close contacts between terminals C31 and C32 to activate Must be closed for the starter to operate Contacts used for controlling this input should be low voltage low current rated Gold Flash or similar Reset C41 C42 Active 24 Vdc Hard contact circuit close contacts between terminals C41 and C42 to activate Must be closed for the starter to operate Open circuit to closed circuit transition resets the starter Contacts used for controlling this input should be low voltage low current rated Gold Flash or similar Auxiliary Trip Input Active 24 Vdc Hard contact circuit open contacts between terminals C53 and C54 to activate Must be open for the starter to operate C53 C54 Contacts used for controlling this input should be low voltage low current rated Gold Flash or similar Active 24 Vdc Hard contact circuit close contacts between terminals C63 and C64 for Local Remote remote control open contacts for local control via pushbuttons on the C63 C64 LST starter 1276A 1E 9812 Contacts used for controlling this input should be low voltage low current r
18. and report any visible signs of damage to TB Wood s Verify that the control circuit is suitable for the application and compatible with the starter For long term reliability of the product and for the elimination of overtemperature trips it is important that the starter be properly cooled Ensure that the ventilation is appropriate for the application See Figure 7 on page 20 for minimum clearances If you remove the enclosure extension and mount the starter in another enclosure without an SCR bypass contactor ensure that sufficient air circulates through the enclosure to cool the starter This may require forced ventilation of the enclosure See Table 7 on page 21 for minimum airflow requirements Ensure that the electronics and fan PT input control power is connected to a control supply Use either terminals A1 and A2 for 115 V or A2 and A3 for 230 V Use only two terminals Following the starter adjustment procedures given in Section 7 of this manual set the starter for the desired parameters 6 2 Commissioning Check Procedure To place the LST starter in operation perform the following checks and procedures 1276A 1E 9812 1 Ensure that the main supply disconnect is open and that no voltage is being delivered to the starter Ensure that the enclosure is free of metallic shavings wire scraps or other debris Before connecting the output terminals to the motor perform an insulation test of the motor
19. developing an application that meets your particular requirements Note that the control voltage connection is not shown in these applications since the options for this are the same for each example As discussed previously the control voltage may be either 115 Vac connected to terminals A1 and A2 or 230 Vac connected to terminals A2 and A3 As a third option the control voltage may be fed from incoming line power Figure 16 shows these control voltage options 5 6 1 Sample Application 1 This application is a stand alone application where the LST starter is installed without any other circuitry and motor operation is controlled using the Start Stop Reset pushbuttons local control Figure 17 on the next page shows the wiring connections for this application Installation procedure 1 Connect line voltage to the LST starter s terminals L1 1 L2 3 L3 5 2 Connect the motor to the starter s output terminals T1 2 T2 4 T3 6 3 PHASE 3 PHASE 280 VAC 50 60 Hz SUPPLY 50 60 Hz SUPPLY 4 N 115 VAC e O O oO O o oO L1 1 L2 3 L3 5 L1 1 L2 3 L3 5 Line Fed Independently Fed Control Voltage Control Voltage Figure 16 Control Voltage Options 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 35 Section 5 Connections 3 Connect the control voltage to the starter s PT input control power terminals see Figure 16 on page 35 4 The performance of the LST starter may be adjusted using t
20. dissipation 4 0 See Figure 7 for required minimum clearances 20 20 0 8 LST 0 8 100 4 0 mm 777777 inches Page 20 Figure 7 Minimum Clearances 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 3 Receiving and Installation 4 4 Mounting in Ventilated Enclosures When mounting an LST starter sufficient airflow through the enclosure must be present to prevent excessive heat build up Figure 8 provides representations of typical ventilated enclosures Figure 8 Typical Ventilated Enclosures gt Soft starters dissipate approximately 4 5 watts per line amp The table on the following page shows the airflow required to limit internal temperature rise of an enclosure to 5 or 10 C 9 or 18 F Note that if additional heat sources are also housed in the enclosure the airflow will need to be increased accordingly Table 7 Minimum Airflow Requirements to Limit Heat Rise Motor Amps Heat Dissipation Airflow ft min Required to Limit to watts 5 C 9 F Rise 10 C 18 F Rise 10 45 17 7 7 1 20 90 31 8 17 7 30 135 49 5 24 7 40 180 63 6 31 8 50 225 81 2 38 8 75 338 120 1 60 0 100 450 158 9 81 2 125 563 197 8 98 9 150 675 240 2 120 1 175 788 279 0 137 7 200 900 317 9 158 9 250 1125 399 1 197 8 300 1350 476 8 240 2 350 1575 558 1 279 0 400 1800 635 8 317 9 450 2025 717 0 356 7 500 2250 794 7 399 1 550 2475 875 9 438 0 600 27
21. input terminals These are active 12 24 Vdc inputs and must be controlled with hard contacts only Do not connect power factor correction capacitors to the LST Solid State Starter s output If static power factor correction is used it must be connected to the supply side of the starter If installing the LST Solid State Starter within a non ventilated enclosure use a bypass contactor to prevent excessive heat build up If installing a bypass contactor ensure that phase connections are correctly made through the contactor between L1 1 to T1 2 L2 3 to T2 4 and L3 5 to T3 6 Failure to observe these instructions will result in death serious injury or equipment damage 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 43 Section 6 First Time Power Up DANGER TENSION DANGEREUSE Avant d entretenir le syst me lectrique Lisez et comprenez ce manuel avant d installer et de faire fonctionner le d marreur transistoris LST L installation les r glages la r paration et l entretien du d marreur doivent tre effectu s par du personnel qualifi en conformit avec les bonnes r gles de l art en lectricit Ne faites pas fonctionner cet appareil d une fa on autre que celle indiqu e au manuel Pour des conseils sur le fonctionnement de cet appareil communiquez avec l ing nieur d applications lectroniques de TB Wood au 1 888 829 6637 Coupez toute alimentation Mesurez entre L1 1 L2 3 L2 3 L3 5 et L3 5
22. nearly all applications However potentiometers are available for the ramp time and Initial Start Current to further refine and customize the soft start See page 49 for further information on the potentiometers 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 17 Section 3 Features 3 7 The Uni Stop Feature In addition to the Uni Start feature LST starters also provide an optional Uni Stop feature This feature dynamically adjusts starter output to match the motor characteristics as they change during stopping which eliminates the motor instability sometimes experienced with ordinary soft start and soft stop systems Uni Stop provides particular advantage in pumping applications where both starting and stopping times can be adjusted to minimize fluid hammer without the need for dedicated pump start models Uni Stop is activated by setting the DIP switch to a value between 2 and 62 seconds for the soft stop ramp time see page 47 for further information on the DIP switch When enabled this feature reduces the voltage applied to the motor causing the motor to stall and decelerate to zero speed The effect of this is to add inertia to the load thereby reducing the rate of deceleration Figure 6 below provides a graphical representation of a typical Uni Stop soft stop VOLTAGE T T T T T T T T 5 10 15 20 25 30 35 40 STOP TIME RAMP TIME seconds Figure 6 Typical Soft Stop with an LST Starter 0
23. the LST starter 2 If necessary remove the two screws securing the cover of the enclosure extension 3 Remove the four screws securing the cover of the starter 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 49 Section 7 Configuration 4 Carefully lift the cover Do not lift too far or with too great a force as you may damage the loom connections 5 The five potentiometers are located on the circuit board on the underside of the cover Figure 22 below shows a representation of their location on the circuit board Adjust the desired potentiometer s as directed in the next section 6 After adjusting the potentiometer s reverse these steps to re assemble the LST starter Exercise care to not damage the loom connections or wiring 7 3 2 Adjusting the Potentiometers After accessing the potentiometers use an insulated screwdriver to turn the potentiometers in the desired direction If you turn any of the potentiometers in a clockwise direction you will increase the ramp time Initial Start Current or sensitivity Conversely if you turn a potentiometer in a counterclockwise direction you will decrease the ramp time Initial Start Current or sensitivity F Main PCB Thermal Model Initial Start Current Shearpin Underside of LST Cover Figure 22 Location of Potentiometers Page 50 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 8 Troubleshooting 8 1 8 2 DANGER
24. the picture below 11 Replace the three input bus bars removed in step 8 on page 63 by reversing the procedure used to remove them 12 Install the External Mount CT Wiring Loom by plugging its six way wiring connector into the CT shunt PCB as shown in the picture below eee 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 65 Appendix A Reposition CTs 13 Feed the loose ends of the External Mount CT Wiring Loom through the case of the LST starter and secure with the cable gland supplied as shown below 14 Re connect the wiring loom to the cover and replace the cover to the LST starter as described in steps 3 through 4 on page 62 Exercise care so that no wiring is pinched or connectors damaged 15 Remove the short orange CT wiring loom from the CTs that were removed from the starter NA H SC Page 66 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Appendix A Reposition CTs 16 Connect the loose ends of the External Mount CT Wiring Loom to the three CTs as shown in the picture below 17 Mount the CTs to measure line current as shown in the picture below EE 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 67 Appendix A Reposition CTs NOTES Page 68 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Appendix B Removal of the Enclosure Extension The LST Solid State Starter provides
25. to a new phase then the PCB may be at fault and should be replaced O 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 8 Troubleshooting Table 19 Motor Does Not Behave As Expected Symptom Motor does not breakaway or accelerate to full speed Action This may result from improperly set Start Current Limit If the motor and load have previously successfully reached full speed but now cannot determine why the starting torque requirements have increased Correct as necessary Increase the DIP switch setting for the Start Current Limit see page 48 so that the motor can produce sufficient torque to accelerate the load to full speed Motor does not rotate immediately when a Start is called for The LST starter s start ramp requires about five seconds to reach the user set initial start current when a Start is initiated This delay while negligible for most applications may cause some loads to not rotate immediately If this is a problem for your application perform the following Increase the DIP switch setting for the initial start current see page 48 for information on setting the DIP switch Reduce the length of the ramp time by adjusting the Ramp Time potentiometer see page 49 for further information Erratic motor operation and tripping Where very small motors are used to test the operation of large starters the possibility exists that drawn current may be insufficient to latch the
26. while Figure 11 shows that the starter may be connected to motors designed for Wye or Delta operation if the motor is appropriate for the supply voltage 5 4 1 Line Contactors The LST starter is designed to be operated with or without a line contactor If a line contactor is used then the starter s SCRs will be isolated when they are most susceptible to damage from voltage transients by being placed in the Off state The LST starter can directly control a line contactor via the Main Contactor M C control output terminals 13 and 14 Figure 10 Three Wire Motor Connection 0 L1 1 o L2 3 o L3 5 T1 2 T2 4 0 T3 6 9 Motor terminals Star connection 02 go Motor terminals Delta connection Figure 11 Wye and Delta Connections 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 25 Section 5 Connections Alternatives to a line contactor are an undervoltage trip circuit breaker operated by the starter s Trip output terminals 41 42 and 43 or a motor operated circuit breaker If a motor operated circuit breaker is used as a line contactor the potential delay between the breaker being signaled to close and phase power being applied to the LST starter could cause the starter to trip on installation faults This may be avoided by closing the motorized breaker directly and using the breaker s auxiliary contacts to control the LSTstarter 5 4 2 Bypass Contactors A CAUTION EQUIPMEN
27. windings to earth The reading should be in excess of 10 MO If practical an insulation test between windings should also be performed 4 Connect the output terminals to the motor Ensure that all the main power terminations are tight 1998 TB Wood s All Rights Reserved Page 45 Section 6 First Time Power Up 6 Ensure that the voltage applied to the disconnect is correct and that all three phases are present 7 Ensure that the incoming supply is connected to L1 1 L2 3 and L3 5 8 If the starter is installed with a bypass contactor ensure that the contactor is bypassing the appropriate terminals on the starter L1 1 must connect via the bypass contactor to T1 2 L2 3 must connect via the contactor to T2 4 and L3 5 must connect via the contactor to T3 6 If the starter is incorrectly bypassed damage to the starter can result and supply fuses will fail or the circuit breaker will open 9 If the starter is installed with a bypass contactor check that the internal CTs were re mounted in the enclosure extension and are monitoring line current See Appendix A on page 61 for more information 10 Apply the control supply to the starter and ensure that all fans are running freely and that the Power LED is illuminated 11 Check the status of all digital inputs by measuring the voltage across them The Stop and Reset inputs should show zero volts if closed If two wire control is used the Stop input should be open and hav
28. 00 953 6 476 8 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 21 Section 3 Receiving and Installation 45 Mounting in Non Ventilated Enclosures If the LST starter is to be in a non ventilated enclosure a bypass contactor should be used to eliminate heat build up The bypass contactor can be AC rated inrush less than 2 5 times the Full Load Current as it only carries the running current of the motor The bypass contactor should be controlled by the Run output terminals 23 and 24 and should be used to bypass the SCRs once the motor has started by bridging between L1 1 T1 2 L2 3 T2 4 L3 5 T3 6 or 1 2 3 4 5 6 See Figure 12 on page 27 for a wiring diagram CAUTION EQUIPMENT DAMAGE HAZARD The bypass contactor must connect L1 1 to T1 2 L2 3 to T2 4 and L3 5 to T3 6 An y other combination will cause fuse failure circuit breaker trip and possible SCR failure To maintain the motor protection features of the LST starter during bypassed operation the internal CTs must be removed and mounted in the enclosure extension so they measure line current See Appendix A on page 61 for the removal and re mounting procedure Failure to follow this instruction can result in injury or equipment damage ATTENTION RISQUE DE DOMMAGES MAT RIELS Le contacteur de d rivation doit relier L1 1 T1 2 L2 3 T2 4 et L3 5 T3 6 Toute autre combinaison entra nera le bris du fusible le d
29. 12 Section 5 Connections Notes The motor may be started and stopped via the remote two wire control circuit Closing the S1 contact initiates a start by applying power to the motor opening the S1 contact causes the starter to initiate a stop or soft stop if so configured Once full voltage is applied to the motor the starter closes the bypass contactor e Trip states may be reset and fault indication cleared by operating the remotely located Reset pushbutton or removing control voltage from the starter 3 PHASE 50 60 Hz SUPPLY LEGEND KiM BYPASS CONTACTOR S1 START STOP CONTROL CONTACT S2 RESET PUSHBUTTON For control voltage options see Figure 16 on page 35 o o LIAL2 3L35 A re N C23 C24 C31 C32 E C42 033 034 le START STOP RESET AUX PT TRIP INPUT kim Sp L t MOTOR LOCAL TRIP de THERM REMOTE RUN wc T1 2T2 4T3 6 B4 B5 C63 C64 23 24 41 42 44 13 14 o o o o o o 9 9 o o o o o Tr AA yr CONTROL SUPPLY NOTE When a bypass contactor is used the three internal CTs must be removed and installed outside the bypass loop TO MOTOR Figure 19 Wiring Connections for Sample Application 3 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 39 Section 5 Connections Page 40 5 6 4 Sample Application 4 In this sample application the LST starter is installed with an undercurrent protection relay and motor operation is controlled via a remote two wire signal
30. 8 158 151 108 104 LST91930B 201 193 191 184 133 127 LST92230B 235 226 222 213 153 147 LST92640B 280 270 263 254 182 175 LST93720B 413 395 373 357 256 245 1276A 1E 9812 O 1998 TB Wood s All Rights Reserved Page 7 Section 2 Technical Characteristics 2 4 7 5 mm 0 3 in 308 5 mm 12 1 inches 561 mm 22 1 inches 244 mm 9 6 inches Page 8 Dimensions Figures 1 and 2 on the following pages show the dimensions of the LST Solid State Starter models NEMA 1 1P23 protection is standard and is achieved by an enclosure extension that encloses the LST starter s terminals A model may be made suitable for mounting in another enclosure IP00 protection by removing the enclosure extension See Appendix B on page 69 for the dimensions once the enclosure extension is removed 382 mm 15 0 inches 295 mm 11 6 inches 16 mm 16 mm 4 06 in 350 mm 13 8 inches 0 6 in N p ESET STOP START Figure 1 LST Models Rated 158 Amps or Greater 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 2 Technical Characteristics 18 mm 18 mm 0 7 in 0 7 in 7 5 mm 206 mm 8 1 inches A 0 3 in 170 mm 6 7 inches 9 E CONTROL E E ol 9 o 5 8 E E ARS E 9 9 0 9 2 o E E 3 Dimension A EST Modal mm inches LST90130B LST90250B LST90340B LST9039B 180 7 1 LST
31. 9 Vac 2 V between the purple lead and each of the orange leads Control fuse failure Ensure that all fuses in the control and power circuits are intact Fuse information is provided on page 24 8 3 Abnormal Motor Performance This section addresses the conditions where the motor behaves in an unexpected manner The following conditions are addressed The motor will not start see Table 17 below e ADOL or uncontrolled start occurs see Table 18 The motor starts but behaves differently than expected see Table 19 on page 57 Table 17 Motor Will Not Start Possible Cause Action Incorrect control voltage Ensurethatthe control voltage is present and correctly connected to the transformer inputs A1 and A2 for 115 V or A2 and AS for 230 V This can be easily checked using an AC volt meter and measuring the voltages at the terminals Voltages should correspond to those listed on the starter s nameplate Control circuit fault Check the Control Input LEDs on the front of the starter and ensure that they indicate the expected circuit status The Stop and Reset circuits must be closed before the starter will accept a start input The status of the control inputs may be independently verified using a volt meter to measure across the terminals If 24 Vdc is measured across either of the terminals when a Start is called for the switch control is connected incorrectly or is faulty 1276A 1E 9812 1998 TB Wood s
32. 90550B LST90730B LST90800B LST91260B LST91360B 250 9 8 Figure 2 LST Models Rated 136 Amps or Less 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 9 Section 2 Technical Characteristics 2 5 Page 10 Weights The following table shows the weights of the LST models Weight Model Kg Lbs Lbs LST90130B 7 15 5 26 5 LST90250B 7 15 5 LST91360B 26 5 LST90340B 7 15 5 LST91580B 46 4 LST90390B 7 15 5 LST91930B 46 4 LST90550B 11 24 3 LST92230B 48 6 LST90730B 11 24 3 LST92640B 50 8 LST90800B 11 24 3 LST93720B 50 8 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 3 Features 3 1 Introduction Figure 3 shows the LST Solid State Starter with the LED indicators and terminal connections labeled Other than the DIP switch these items are described in this section the DIP switch is discussed in Section 7 starting on page 47 O Local Control Pushbuttons RESET STOP START DIP Switch Panel Cover cama strac Starter Status START 9 LED Display wes LST FULL VOLTAGE Soft Starter TRIP Ge e Three Phase ngicatofs g20 Diagnostic Indicators Remote Control CONTROL e INPUT STATUS Input Terminals 2 0 0 A quo Line Input Terminals CLA L1 1 L2 3 L3 5 Td ejeje Ground 0 Fari Control Voltage u e m m Terminals Connection pepese JE O Terminals for Local Remote Control Output Terminals A
33. Documentation The following documentation is also available for other members of the S trAC line of soft start controllers Form 1232 HST Solid State Starter e Form 1233 IST Soft Start Controller Form 1255A SOFTRON Soft Start Controller Form 1257 DST Solid State Starter Publication History Date Nature of Change October 1998 Pre release version Form 1276 December 1998 First edition Form 1276A 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 2 Technical Characteristics 2 1 Interpreting Model Numbers The model number of the LST Solid State Starter appears on the shipping carton label and on the technical data label affixed to the model The information provided by the model number is shown below LST 9 0800 B LST Solid State Starter a Voltage Code 9 Universal 200 600 Vac Amperage Motor FLA Light Duty Rating for example 0800 80 0 A Enclosure B NEMA 1 IP23 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 3 Section 2 Technical Characteristics 2 2 Page 4 General Specifications Power circuit Reverse parallel connected thyristors Input voltage 200 to 600 Vac 3 phase Input frequency 50 Hz 2 Hz 60 Hz 2 Hz Control voltage 115 V 215 10 or 230 V 15 10 Current rating See Section 2 3 on the next page Motor connection 3 wire Digital i
34. Hard contact normally open relay contact Closes when the starter receives start signal Opens when the starter stops applying voltage to the motor and when the starter trips Designed to control operation of a line contactor if connected on the input of the starter This function is particularly useful when using the Soft Stop function and a line contactor as it closes the contactor on start and opens the contactor at the end of the ramp down period Hard contact normally open relay contact Run Closes when the starter is applying line voltage to the motor 23 24 Designed to control a bypass contactor if used and or as an Off Load output for compressors conveyors pumps etc Hard contact Form C relay contacts Trip Terminals 41 and 42 are closed in normal operation terminals 41 and 44 41 42 44 are open 1276A 1E 9812 Terminals 41 and 44 are closed when starter is tripped terminals 41 and 42 are open O 1998 TB Wood s All Rights Reserved Page 33 Section 5 Connections Table 12 Overview of the Operation of the Relay Outputs Relay Off mode Description In the Off mode the Main Contactor Run and Trip relay outputs are in their normal state Prestart mode In the Prestart mode the Main Contactor is closed and the starter s microprocessor performs a number of measurements Depending on the results of these the starter either auto configures itself and enters the Start mode or trips on an in
35. MI com TB Wood s S TRAC LST Solid State Starter User s Manual e A ING 2 Da ap ST SS 2 _ ee TB WOOD S INCORPORATED Chambersburg Pennsylvania TRADEMARK NOTICE mE TB Wood s and MM are registered trademarks of TB Wood s Incorporated S TIRAC is a trademark of TB Woods Incorporated 1998 TB Wood s All Rights Reserved Table of Contents SECTION 1 INTRODUCTION 1 1 PRODUCTOVERVIEW occ ia Ee 1 1 2 MODELSCURRENTLYAVAILABLE 1 1 3 SCOPE OF THIS MANUALE 2 1 4 RELATED DOCUMENTATION 2 2 1 5 PUBLICATION HISTORY oocccccccccccc 2 2 SECTION 2 TECHNICAL CHARACTERISTICS 2 1 INTERPRETING MODEL NUMBERS 3 2 2 GENERAL SPECIFICATIONS 4 2 3 CURRENT RATINGS iuc ee wa Sees vedo wed AREA EA 5 2 3 1 Continuous Operation 5 2 3 2 Bypassed Operation 7 2 4 DIMENSIONS 2c uve edes hodie odios e ate dede E Ee AE 8 25 WEIGHT Si ERE eue 10 SECTION 3 FEATURES 3 1 INTRODUCTION io 0 cette tenes 11 3 2 LOCAL CONTROL PUSHBUTTONS 12 3 8 LED INDICATORS ei ira dat as 12 3 3 1 Status Indicators 12 3 3 2 Remote Control Input Indicators 12 3 3 3 Three Phase
36. T DAMAGE HAZARD The bypass contactor must connect L1 1 to T1 2 L2 3 to T2 4 and L3 5 to T3 6 An y other combination will cause fuse failure circuit breaker trip and possible SCR failure To maintain the motor protection features of the LST starter during bypassed operation the internal CTs must be removed and mounted in the enclosure extension so they measure line current See Appendix A on page 61 for the removal and re mounting procedure Failure to follow this instruction can result in injury or equipment damage A ATTENTION RISQUE DE DOMMAGES MATERIELS French French Si cette directive n est pas respect e cela peut entrainer des blessures corporelles ou des dommages mat riels Page 26 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections If the LST starter is to be mounted in a non ventilated enclosure a bypass contactor should be used to eliminate heat buildup in the enclosure Figure 12 shows a typical wiring for a bypass contactor The bypass contactor may be AC1 rated inrush less than 2 5 times FLC as it only carries the running current of the motor The bypass contactor should be controlled by the Run output terminals 23 and 24 and should bypass the SCRs once the motor has started by bridging between terminals L1 1 T1 2 L2 3 T2 4 and L3 5 T4 6 Bypass contactors should be controlled to bypass the starter during Run mode The digital output of the starter s b
37. and input voltage for the application was purchased 4 If you will be storing the starter after receipt place it in its original packaging and store in a clean dry place free from direct sunlight or corrosive fumes where the ambient temperature is not less than 5 C 23 F or greater than 65 C 149 F 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 19 Section 3 Receiving and Installation CAUTION EQUIPMENT DAMAGE HAZARD Do not operate or install any LST starter that appears damaged Failure to follow this instruction can result in injury or equipment damage ATTENTION RISQUE DE DOMMAGES MAT RIELS Ne faites pas fonctionner et n installez pas tout onduleur qui semble tre endommag Si cette directive n est pas respect e cela peut entra ner des blessures corporelles ou des dommages mat riels 4 3 Mounting Precautions Improper installation of the LST Solid State Starter will greatly reduce its life Be sure to observe the following precautions when selecting a mounting location Failure to observe these precautions may void the warranty 1 Do not install the starter in a place subjected to high temperature high humidity or excessive vibration 2 Donot mount the starter near heat radiating elements or in direct sunlight 3 Mount the starter vertically 4 Do not obstruct cooling airflow 5 The starter generates heat DIA Allow sufficient space around 100 the unit for heat
38. and re mount the internal CTs Note that since the CTs are already mounted in the enclosure extension for the three largest LST models LST92230B LST92640B and LST93720B this procedure does not apply to these models For bypassed operation with these models the CTs may be connected on either the line or motor side However be sure that the CTs are outside the bypass loop Figure 23 shows the connection diagrams for the CTs Also note that you do not need to reposition the CTs if separate motor protection is provided while the LST starter is bypassed 3 Wire Connection Bypassed K1M Supply D 1 Li 1 1 Li 1 1 1 1 Li 1 1 1 Li Li I 1 1 Li Alternate Installation Figure 23 Wiring Connections for Current Transformers CTs 1276A 1E 9812 O 1998 TB Wood s All Rights Reserved Page 61 Appendix A Reposition CTs DANGER HAZARDOUS VOLTAGE Disconnect all power before servicing the electrical system Failure to observe this instruction will result in death or serious injury DANGER TENSION DANGEREUSE Coupez toute source d alimentation avant d entretenir le syst me lectrique Si cette directive n est pas respect e cela entra nera la mort ou des blessures graves To reposition the CTs follow these steps 1 Obtain External Mount CT Wiring Loom part number 9FLCE1 from TB Woods 2 Once the necessary part is obtained disconnect all power from the LST starter 3 Remove the two
39. ated Gold Flash or similar 1998 TB Wood s All Rights Reserved Page 31 Section 5 Connections Off mode Table 10 Overview of Operation of Digital Inputs In the Off mode the starter s microprocessor monitors the Start Stop Reset and keypad inputs a Ifthe Reset input is an open circuit the starter ignores all other inputs b If the Stop Start and Reset inputs are closed the starter enters the Prestart mode Note The Start inputis only monitored in the Off and Soft Stop modes Prestart mode In the Prestart mode the Main Contactor auxiliary is closed and the starter s microprocessor measures the supply frequency motor connection phase sequence and the presence of all phases Depending on the results of these measurements the starter either auto configures itself and enters the Start mode or trips on an installation fault or phase sequence fault In the Start mode the starter s microprocessor monitors the Stop and Reset inputs a If the Stop input is open and Reset is closed the starter enters the Soft Stop mode Start mode b If both Stop and Reset are open the starter immediately stops and enters the Off mode c If the output voltage from the starter reaches full voltage the starter enters the Run mode In the Run mode the starter s microprocessor monitors the Stop and Reset inputs Run mode a If the Stop input is open and Reset is closed the starter enters the Soft Stop mode b
40. ated shall not in any event be liable for any incidental or consequential damages secondary charges expenses for installing or disconnecting or losses to persons or property resulting from any failure of the LST Solid State Starter Procedure for Repairs If a LST Solid State Starter needs to be returned for repair you must first obtain an RGA number before returning the unit To obtain an RGA number call 1 888 TBWOODS 829 6637 After obtaining the RGA number create a packing list for the LST starter to be returned for repair This packing list should be on your company s letterhead and should state at a minimum the model number serial number and RGA number After creating the packing list send the LST starter and packing list to the following address TB Wood s Incorporated 100 Bonita Drive Greensboro NC 27405 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 59 Section 9 Warranty Information NOTES Page 60 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Appendix A Repositioning CTs for Bypass Operation When an LST Solid State Starter is mounted in a non ventilated enclosure a bypass contactor should be used to eliminate heat buildup in the enclosure The use of a bypass contactor will also require that the current transformers CTs be mounted in the enclosure extension rather than inside the starter itself to preserve the protective features of the LST starter This Appendix explains how to remove
41. cators provide information on the status of the remote Start Stop and Reset inputs Note that they do not indicate the status of the local Start Stop and Reset pushbuttons The following information is provided by the remote control input indicators Start yellow The remote Start input is closed Stop yellow The remote Stop input is closed Reset yellow The remote Reset input is closed 3 3 3 Three Phase Diagnostic Indicators Three LED indicators provide phase information Each LED indicates the voltage differential between the input and output voltage on each phase of the LST starter 1998 TB Wood s All Rights Reserved 1276A 1E 9812 3 4 3 5 Section 3 Features Under normal conditions all three LEDs will be lit with equal intensity when the starter is Off and will gradually dim as the output voltage increases during a start The LEDs will be completely extinguished when the starter is delivering full output voltage Under abnormal conditions the indicators may appear as follows e Ifthe output voltage is not present on a phase or if the output has an open circuit on a phase the LED for that phase will not be lit while the other LEDs will be lit If the voltage is low on one phase one or more LEDs will be lit dimly e If an SCR has a failed short circuit the corresponding LED will not be lit while the other LEDs will be lit See page 51 for more detailed information on using the LEDs to dia
42. clenchement du disjoncteur ou possiblement le bris du SCR Pour pr server les particularit s de protection du moteur du d marreur LST durant la d rivation les TC internes doivent tre enlev s et mont s dans la rallonge de l armoire pour mesurer le courant du secteur Consultez la proc dure d enl vement et de remontage l annexe A de la page 61 Si cette directive n est pas respect e cela peut entrainer des blessures corporelles ou des dommages mat riels Page 22 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections 5 1 Introduction This chapter describes the power circuit and control circuit connections for the LST Solid State Starter Figure 9 below provides the electrical connection diagram for the starter Note that the LST starter is shipped from the factory without the gland plate attached to the enclosure extension Since all power and control 8 PHASE 50 60 Hz TO SUPPLY MOTOR 10 115 V 10 10 OR 230 V 10 gt MAIN CONTACTOR 4 START RUN Y STOP TRIP RESET AUXILIARY TRIP INPUT LOCAL REMOTE MOTOR THERMISTORS Figure 9 LST Starter Electrical Connection Diagram 1276A 1E 9812 O 1998 TB Wood s All Rights Reserved Page 23 Section 5 Connections 5 2 5 3 Page 24 wiring must pass through the gland plate attach the gland plate before making any wiring connections The gland plate attaches to the bottom of the enclosure
43. cuit attached to terminals B4 and B5 It will trip or not re start if a thermistor fault is present Check the condition of the motor If it is hot the thermistors are probably operating correctly shutting down when too hot Wait for the motor to cool and then reset and restart Check that a connection is made to terminals B4 and B5 If a thermistor circuit is not used a jumper must be connected across these two terminals Check the thermistor circuit for continuity 1998 TB Wood s All Rights Reserved Page 53 Section 8 Troubleshooting Table 15 Trip LED Flashing and All Phase LEDs Illuminated Equally Possible Cause Action Phase Imbalance Trip The starter monitors the current drawn on each phase and Trip LED flashes four calculates the difference between the currents flowing on the three times phases The difference between the highest phase and the lowest phase is compared and a trip will occur if a continuous condition exceeds the preset limits Ensure that all three phases are present at the starter s input Measure phase to phase and phase to neutral for each phase Ensure that the circuit from the starter to the motor is complete Disconnect the starter from the supply Check for circuit continuity by measuring between each output phase with an ohmmeter The reading is generally 1 to 2 Q Electronic Shearpin Trip The starter monitors the current drawn by the motor and trips if the Trip LED flash
44. cy it should be 50 Hz 2 Hz or 60 Hz 2 Hz Ifthe supply frequency is okay the likely cause is the loss of three phase input while the motor was running or the genset governor portable generator is out of calibration Overcurrent Trip Trip LED flashes twice The starter monitors the current drawn by the motor and mathematically models the expected motor temperature The starter will not allow a restart after an overcurrent trip until the thermal model has reached a temperature below the trip temperature Note that the motor must be allowed to cool sufficiently for a hot restart to occur If the thermal margin is small the motor may only achieve partial speed before re tripping Check the motor and load for the cause of the motor overload Allow time for the motor to cool and then reset and restart Check that the DIP switch is set correctly for the attached motor s FLC value see page 48 for information on setting the DIP switch Check that the DIP switch setting for the initial start current is adequate to allow the motor to easily accelerate to full speed see page 48 for information on setting the DIP switch Ifan overcurrent trip occurs during acceleration and the motor was cold at the start adjust the Thermal Model potentiometer to decrease the sensitivity see page 49 for more information Thermistor Trip Trip LED flashes three times 1276A 1E 9812 The starter monitors the thermistor cir
45. e a terminal voltage of between 12 and 24 Vdc 12 Connect an ammeter in the circuit to display the current during start Use a sufficiently rated clamp type meter 13 Ensure that the motor couplings and machine are ready for an attempted start 14 Start the motor using the LST starter and monitor the start current and direction of rotation If the direction of rotation is incorrect stop the machine isolate the starter that is open the disconnect and swap two phases on the input or the output of the starter 15 Ensure that the measured start current does not exceed the ratings for the LST Solid State Starter 16 If a bypass contactor is used ensure that it closes once the motor has reached full speed and the start current has dropped 17 Ensure that the motor and machine operate satisfactorily After completing the Commissioning Check Procedure record the settings and file them in an appropriate location for future reference Page 46 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 7 LST Starter Configuration 7 1 7 2 Introduction The LST Solid State Starter is configured via the DIP switch located beneath the cover on the front of the starter For nearly all applications setting the DIP switch as directed in this section should produce satisfying performance However if further refinement is required potentiometers are available for fine tuning the starter s performance These potentiomet
46. ers are also discussed in this section DIP Switch Configuration The DIP switch is located beneath the cover on the front of the LST starter as shown in Figure 21 below The following sections describe the four items configured by the DIP switch 7 2 1 Soft Stop Ramp Time If you wish to employ a soft stop set the top five switches to add up to the required ramp time If you do not wish to utilize a soft stop set all switches to zero 32 16 STOP RAMP TIME 8 EC e SEC 2 not used not used PHASE SEQUENCE PROTECTION START CURRENT LIMIT FLC _ 2XFLC SWITCH SETTING RESET STOP START MOTOR NAMEPLATE FLC Amps See DIP Switch Current Setting On Starter Nameplate 0 0 0 0 0 0 0 0 POWERO CONTROL START OUTPUT ON Push here to open DIP switch panel Note that the panel is removable not hinged Figure 21 Location of DIP Switch 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 47 Section 7 Configuration You should set the stop time to optimize stopping conditions for the connected load Note however that the set time does not dictate the actual stopping time of the motor which is dependent on motor and load characteristics The soft stop ramp merely specifies the time in which the applied voltage will be reduced to zero and the motor is offline 7 2 2 Phase Sequence Protection Phase sequence protection guards against reverse motor rotat
47. es six times shearpin limit is exceeded Ensure that the motor is not severely overloaded If it is overloaded reduce the load reset and re start Seeifthe load is jammed If so unjam the load reset and re start Check whether a power factor correction is connected to a starter s output terminal If so correct the condition Auxiliary Trip Discover why the Auxiliary Trip was activated and correct the Trip LED flashes seven condition Reset and restart times Check the Auxiliary Trip circuit for continuity Page 54 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 8 Troubleshooting Table 16 Power LED Not Illuminated Possible Cause Action Incorrect control voltage Ensure that the control voltage is present and correctly connected to the transformer inputs A1 and A2 for 115 V or A2 and A3 for 230 V This can be easily checked using an AC volt meter and measuring the voltages at the terminals Voltages should correspond to those listed on the starter s nameplate Transformer failure The integrity of the starter s PT input control power can be checked by measuring the secondary voltage of the transformer Remove the starter s cover to reveal the PT and unplug the white plug from the Main Control PCB After confirming the correct voltage is applied to the input of the transformer measure the AC voltage coming from the transformer It should be 18 Vac 4 V between the two orange leads and
48. extension using four of the screws provided the other two screws are for attaching the cover After attaching the gland plate remove the appropriate knock outs to run the power and control wiring through the gland plate Power Connections The power connections are L1 1 L2 3 and L3 5 for input mains connection and T1 2 T2 4 and T3 6 for motor connection Fuse Selection Fast acting semiconductor fuses should be used with the LST starter to reduce the potential of damage The recommended supplier is Bussman although equivalent values from other manufacturers may be substituted Use the following table to select the appropriate fuses for each LST model Table 8 Fuse Selection Table Model Number Fuse Number Required LST90130B FWP 40B 1 per phase LST90250B FWB 125B 1 per phase LST90340B FWB 125B 1 per phase LST90390B FWB 150A 1 per phase LST90550B FWB 150A 1 per phase LST90730B FWP 200A 1 per phase LST90800B FWP 300A 1 per phase LST91260B FWP 400A 1 per phase LST91360B FWP 400A 1 per phase LST91580B FWP 400A 1 per phase LST91930B FWP 450A 1 per phase LST92230B FWP 450A 1 per phase LST92640B FWP 450A 1 per phase LST93720B FWP 600A 1 per phase 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections 5 4 Motor Connection The LST Solid State Starter may be configured in a number of circuit configurations Figure 10 below illustrates a three wire motor connection
49. gnose and correct abnormal conditions Terminals The LST starter has five groups of terminals as shown in Figure 3 on page 11 along with the Ground terminal Line input terminals L1 1 L2 3 L3 5 e Output terminals T1 2 T2 4 13 6 Control voltage terminals A1 A2 A3 Control terminals in two groups These terminals will be discussed in greater detail in Section 5 starting on page 23 Protective Features The LST starter incorporates several protective features These are described in the following sections 3 5 1 Auto Configuration LST starters automatically determine the motor connection supply frequency supply voltage and phase sequence They also configure internal parameters for correct operation If a problem is detected the LST starter inhibits operation 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 13 Section 3 Features 3 5 2 Prestart Circuit Analysis and Configuration LST starters also perform a series of automatic system tests prestart circuit analysis and configuration to prevent damage from incorrect installation or supply problems Tests include Motor and supply circuits Motor connection configuration Frequency range Voltage range Phase sequence Upon successful completion of the tests voltage is applied to the motor The starter will perform up to three prestart checks before tripping due to failure of any of the prestart checks See Figure 4 for relay operation du
50. he DIP switch See page 47 for configuring the DIP switch and page 49 for fine tuning the performance of the starter Notes The motor may be started and stopped by using the pushbuttons on the top of the LST starter Pressing the Start pushbutton initiates a start by causing the starter to apply power to the motor pressing the Stop button causes the starter to initiate a stop or soft stop if so configured Trip states may be reset and fault indication cleared by pressing the Reset pushbutton on the starter or removing control voltage from the starter 3 PHASE 50 60 Hz SUPPLY Tr For control voltage options see Figure 16 on page 35 Oo O 0 o O O O 0 O O O L1 1 L2 3 L3 5 A1 A2 A3 C23 C24 C31 C32 C41 C42 C53 C54 ler START STOP RESET AUX TRIP INPUT MOTOR LOCAL TRIP THERM REMOTE RUN FP M C B4 B5 C63 C64 23 24 41 42 44 13 14 o 0 O O O O O O O Oo Oo X TO MOTOR Figure 17 Wiring Connections for Sample Application 1 Page 36 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections 5 6 2 Sample Application 2 This sample application is a typical application where the LST starter is controlled by remote Start Stop Reset pushbuttons and a line isolation contactor is used The local pushbuttons cannot be used in this application since the Local Remote terminals are connected together via a jumper Figure 18 shows the wiring connections for this example Installation pro 1 C
51. ion due to changes in the phase sequence of the incoming supply If you wish to use this type of protection set the DIP switch to the On position Note that if reversing contactors are part of the application you should not use phase sequence protection the DIP switch should be set to Off 7 2 3 Start Current The top three switches of the lower group are used to configure the Initial Start Current as a percentage of FLC The start current is the initial current from which the current ramps up to the current limit as shown in Figure 5 on page 17 You should set the Initial Start Current such that the motor easily accelerates to full speed The minimum start current is two times FLC which is configured by setting all three switches to zero To set the start current to a different level set the switches so they add up to the desired current when added to twice the FLC value In other words Start Current Switch 1 Value Switch 2 Value Switch 3 Value 2 x FLC While the maximum value for the Initial Start Current is 5 5 times FLC care should be taken to not exceed the LST starter s ratings as detailed on the rating nameplate Note that the initial start current may be fine tuned by using the Initial Start Current potentiometer see page 48 for further information 7 2 4 Motor Nameplate FLC The bottom five switches of the lower group are used to configure the FLC value as obtained from the connected motor s nameplate You
52. l brilliance see Table 14 on page 52 On the other hand if the three LEDs are all illuminated with equal brilliance see Table 15 on page 53 Note that when the phase LEDs are illuminated equally the Trip LED will flash multiple times rapidly then remain extinguished for a short 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 51 Section 8 Troubleshooting period and then repeat this sequence to indicate the particular fault that caused the trip condition If the Power LED is not illuminated see Table 16 on page 55 Table 14 Trip LED Flashing and All Phase LEDs Not Illuminated Equally Possible Cause Invalid motor connection Action With voltage applied to the input of the starter check the voltage input to output of each phase of the starter If the voltage measured on the phase which has the dim or extinguished LED is zero low or not equal to the other phases this indicates the potential for an incorrect motor connection Verify the motor connection see page 25 Missing phase s With voltage applied to the input of the starter check the voltage input to output of each phase of the starter If the voltage measured on the phase which has the dim or extinguished LED is zero low or not equal to the other phases this indicates the potential for an incorrect motor connection Ensure that three phases are present at the input terminals Ensure that the motor is correctly connected to the starter En
53. line contactor which applies power to the motor pressing the Stop button causes the starter to initiate a stop or soft stop if so configured Trip states may be reset and fault indication cleared by operating the remotely located Reset pushbutton or removing control voltage from the starter 5 6 3 Sample Application 3 In this sample application the LST starter is controlled by a remote two wire start circuit and is bypassed during run operation Note that the starter s CTs were removed from within the unit and mounted externally to keep all protection features operative when the starter is bypassed See Appendix A for instructions on externally mounting the starter s CTs Figure 19 on the next page provides the wiring connections for this sample application Installation procedure 1 Connect line voltage to the LST starter s terminals L1 1 L2 3 L3 5 Connect the motor to the starter s output terminals T1 2 T2 4 T3 6 Connect the bypass contactor to bridge between L1 1and T1 2 L2 3 and T2 4 and L3 5 and T3 6 Connect the control voltage to the starter s PT input control power terminals see Figure 16 on page 35 Connect control circuitry as shown in Figure 19 The performance of the LST starter may be adjusted using the DIP switch See page 47 for configuring the DIP switch and page 49 for fine tuning the performance of the starter 1998 TB Wood s All Rights Reserved 1276A 1E 98
54. ll cause the starter to trip and show the Auxiliary Trip indication Trip states may be reset and fault indication cleared by operating the remotely located Reset pushbutton or removing control voltage from the starter 5 7 Final Assembly After making the desired power and control wiring connections locate the cover and attach it to the front of the enclosure extension using the two screws provided 1276A 1E 9812 O 1998 TB Wood s All Rights Reserved Page 41 Section 5 Connections NOTES Page 42 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 6 First Time Power Up DANGER HAZARDOUS VOLTAGE Before servicing the electrical system Read and understand this manual before installing or operating the LST Solid State Starter Installation adjustment repair and maintenance of this starter must be performed by qualified personnel and in accordance with good electrical practice Do not operate this equipment in a manner other than as detailed in this manual For advice on operating this equipment contact a TB Wood s Electronics Application Engineer at 1 888 829 6637 Disconnect all power Measure L1 1 L2 3 L2 3 L3 5 and L3 5 L1 1 to ensure no AC voltage is present Ensure that the LST Solid State Starter is completely isolated from the power supply before attempting any work on the unit Ensure that the cabinet is free of metal shavings and other debris Do not apply voltage to the starter s digital
55. ng power factor correction capacitance to an inductive supply forms a resonant circuit This resonant circuit can produce high ringing voltage that can damage the LST starter and other equipment connected to the same supply Connecting power factor correction capacitors to the supply after the motor has started ensures the supply is loaded and dampens the ringing voltage This contact is controlled with the starter s Run relay terminals 23 and 24 as shown in Figure 13 on the next page 5 4 4 Phase Sequence The supply may be connected to the LST starter in any phase sequence However the starter s Phase Sequence Protection feature may be used to prevent motor rotation in the reverse direction caused by a negative phase sequence Page 28 1998 TB Wood s All Rights Reserved 1276A 1E 9812 5 5 Section 5 Connections MOTOR 3 PHASE SUPPLY POWER FACTOR CORRECTION CONTACTOR CONTROL SUPPLY Figure 13 Power Factor Correction Wiring Diagram Control Connections 5 5 1 Control Supply for Fans and Electronics The LST starter must be supplied with control voltage which ELECTRONICS controls both the electronics and PAYA cooling fans if fan cooled The f A control voltage terminals are located on the lower right side of L IL J the starter as shown in Figure 3 115V or 230V on page 11 Refer to the labeling 10 10 on the starter for control voltage L options and Figure 14 Figure 14 Control Voltage O
56. nputs 24 Vdc approximately 8 mAdc Use contacts that are low voltage low current rated for example Gold Flash Quantity 5 Start Stop Reset Auxiliary Trip Input Local Remote Relay outputs Contacts rated for 5 A E 250 Vac 360 VA or 5 A 30 Vdc resistive Quantity 3 Run Form A Main Contactor Control Form A Trip Form CH Degree of protection NEMA 1 IP23 with cover and wiring gland in place IPOO without enclosure extension see Appendix B Ambient temperature Operating 0 C to 45 C 32 F to 113 F Storage 5 C to 65 C 23 F to 149 F Relative humidity 5 to 95 maximum non condensing Protective features Prestart motor circuit check Prestart input frequency range check Prestart input voltage range Prestart phase loss protection Phase sequence protection Agency Listings Certified to CAN CSA C22 2 No 14 Conforms to Industrial Control Equipment Component Only ETLListed CE Marked 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 2 Technical Characteristics 2 3 Current Ratings 2 3 1 Continuous Operation Table 1 60 Duty Cycle Off Time 145 seconds 10 Starts per Hour Light Duty Medium Duty Heavy Duty Model 300 FLC for 10 sec 300 FLC for 30 sec 450 FLC for 30 sec 40 C 45 C 40 C 45 C 40 C 45 C 104 F A 113 F A 104 F A 113 F
57. onnect cedure line voltage to the LST starter s terminals L1 1 L2 3 L3 5 from the output terminals of an appropriate line contactor 2 Connect the motor to the starter s output terminals T1 2 T2 4 T3 6 3 Connect the control voltage to the starter s PT input control power terminals see Figure 16 on page 35 4 Connect 3 PHASE 50 60 Hz SUPPLY TI K1M L1 1 L2 3 L3 5 LST 1 2T2 4 T3 6 TO MOTOR Figure 18 1276A 1E 9812 control circuitry as shown in Figure 18 LEGEND LINE CONTACTOR START PUSHBUTTON STOP PUSHBUTTON RESET PUSHBUTTON For control voltage options see Figure 16 on page 35 o O O O O _L Au A2 A8 C23 C24 C31 C32 C41 C42 C53 C54 se START STOP RESET AUX PT TRIP INPUT MOTOR LOCAL TRIP THERM REMOTE RUN wc B4 B5 C63 C64 23 24 41 42 44 13 14 o O 0 0 0 O O 0 O O KIM Cae CONTROL SUPPLY Wiring Connections for Sample Application 2 1998 TB Wood s All Rights Reserved Page 37 Section 5 Connections Page 38 5 The performance of the LST starter may be adjusted using the DIP switch See page 47 for configuring the DIP switch and page 49 for fine tuning the performance of the starter Notes The LST starter is in the Remote Control mode The motor may be started and stopped by using the remotely located pushbuttons Operating the Start pushbutton initiates a start by causing the starter to close the
58. orate electronic shearpin protection This protection may be used to detect changes in motor loading that may indicate that the motor is about to jam thereby allowing the starter to trip before the motor drive chain and or machine is damaged With this protection if the motor exceeds a preprogrammed maximum current the starter will trip and turn off The default setting is for the protection to be enabled once the motor reaches full speed and operates at 300 FLC However this is adjustable via the Electronic Shearpin potentiometer See page 49 for information on how to access and adjust this potentiometer 3 5 5 Motor Overload Protection Advanced motor overload protection is provided by the utilization of a thermal model for motor temperature The connected motor s FLC is entered into this model and then the model continually calculates motor temperature even when the motor is not running This ensures good protection while still enabling the motor to work to its maximum capacity during both start and overload conditions If necessary you may adjust the sensitivity of this 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 15 Section 3 Features 3 6 Page 16 model with the Thermal Model potentiometer See page 49 for information on how to access and adjust this potentiometer When commissioning or re commissioning after the removal of control voltage from the starter verify that the motor is cold before sta
59. ptions 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 29 Section 5 Connections 5 5 2 Digital Inputs CAUTION EQUIPMENT DAMAGE HAZARD Voltage must not be applied to the digital input terminals Application of voltage is likely to cause equipment damage Failure to follow this instruction can result in injury or equipment damage ATTENTION RISQUE DE DOMMAGES MAT RIELS Aucune tension ne doit pas tre appliqu e aux bornes d entr e num rique L application de tension va probablement endommager l appareil Si cette directive n est pas respect e cela peut entrainer des blessures corporelles ou des dommages mat riels The LST starter has five digital inputs Start Stop Reset Auxiliary Trip Input and Local Remote Figure 3 on page 11 shows the location of the terminals for these inputs Table 9 on the next page describes the digital inputs while Table 10 on page 32 provides operational information for the inputs Page 30 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 5 Connections Table 9 Digital Inputs for the LST Solid State Starter Inputs Start C23 C24 Description Active 24 Vdc Hard contact circuit close contacts between C23 and C24 to operate Four Wire Control The start contact is closed momentarily to start the motor The start signal is then latched internally by the starter until either the starter trips or the Stop circuit is opened see below Two
60. puts and neutral or earth This should be less than 10 Vac For an installation with no neutral apply three phase input power to the starter in the Off state and then measure the voltage from input to output on each phase L1 1 to T1 2 L2 3 to T2 4 and L3 5 to T3 6 This measured voltages should be roughly equal To test the firing circuit perform the Firing Circuit Test This test verifies the proper firing of the thyristor gate circuits and check the entire firing circuit including SCR Firing Loom and circuit board The Firing Circuit Test is as follows Ensure that the Firing Looms are plugged into the main PCB Disconnect the supply and motor Use a 500 V analog insulated tester low voltage ohm meters or multi meters are not adequate measure the resistance between input and output on each phase L1 1 to T1 2 L2 3 to T2 4 and L3 5 to T3 6 This resistance should be close to 33 kQ If less than 33 kQ then excess leakage through the SCRs may be occurring If greater than 33 kQ then a control PCB fault or a Firing Loom fault may have occurred To discriminate between a PCB fault and a Firing Loom fault swap the Firing Loom plug from the phase with the high resistance with a plug from one of the other phases Then repeat the resistance measurements If the high resistance remains on the same phase the Firing Loom is suspect and should be checked for loose connections or replaced If the high resistance moves
61. ring prestart circuit analysis and configuration CLOSED OPEN 100 OUTPUT VOLTAGE 0 MAIN 13 14 CLOSED CONTACTOR BEN RUN 23 24 CLOSED BYPASS CONTACTOR OPEN TRIP CLOSED 41 42 44 Sech H HW JI Mi UPTO THREE PRESTART CHECKS Figure 4 Relay Operation During Prestart Circuit Analysis and Configuration Page 14 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 3 Features 3 5 3 Phase Loss and Phase Sequence Protection LST starters provide phase loss protection as well as optional phase sequence protection With phase loss protection if a phase is lost either before or during operation the starter will trip and turn off The sensitivity of the protection is automatically reduced during starting and stopping to accommodate the discontinuous waveform If necessary the sensitivity may be further customized by using the Phase Loss potentiometer see page 49 for further information on this potentiometer In addition to phase loss protection which is always active you may also choose to utilize phase sequence protection This type of protection guards against damage from reverse motor rotation caused by incorrect phase sequence of the incoming electrical supply The starter will trip and turn off if an incorrect phase sequence is detected Phase sequence protection is turned on or off via the DIP switch see page 48 for more information 3 5 4 Electronic Shearpin Protection LST starters incorp
62. rting the motor to ensure accurate thermal modeling The thermal model is compromised if the motor is operated outside of its specification for example ambient temperature in excess of rated ambient or motor cooling fan is blocked or inoperative Motor thermistor protection should be used to detect abnormal conditions 3 5 6 Thermistor Protection PTC motor thermistors if fitted in the motor may be directly connected to terminals B4 and B5 of an LST starter If motor thermistors are not connected terminals B4 and B5 should be connected together by a jumper LST starters are shipped from the factory with a jumper in place The thermistor circuit should be run in screened cable and must be electronically isolated from earth and all other power and control circuits The threshold resistance is 1800 Q and the thermistor current is less than 1 5 mA 3 5 7 Auxiliary Trip Protection Terminals C53 and C54 may be used to connect a device such as an undercurrent relay low level probes or vibration switches to remotely trip the LST starter This simplifies control circuitry since the starter functions as the sole point of connection for any external control circuitry The Uni Start Feature Uni Start is an advanced method of control used by LST starters to generate a controlled current soft start In this method motor starting current is raised to an Initial Start Current and then ramped up to the customer established Start Current Limi
63. screws securing the cover of the enclosure extension and then remove the cover and set aside 4 Unscrew the four screws securing the cover of the starter 5 Lift the cover only enough to reach the wiring loom connections beneath the cover Do not lift too far or too forcefully as you may damage the wiring loom or connections 6 Unplug all loom connections and then set the cover aside 7 Remove the three screws from the input terminals as shown below note that in this picture and all subsequent pictures the enclosure extension was removed for clarity Page 62 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Appendix A Reposition CTs 8 Remove the three input bus bars running from the input terminal block molding to the CTs by removing all six screws retaining the bus bars and then sliding the bars out of the molding The pictures below illustrate this step 1276A 1E 9812 O 1998 TB Wood s All Rights Reserved Page 63 Appendix A Reposition CTs 9 Remove the CTs by unplugging the white six way connector from the CT shunt PCB and lifting the CTs out of the unit Oe A A EE Page 64 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Appendix A Reposition CTs 10 For models LST90130B through LST90390B discard the CT mounting bracket For models LST90550B through LST91360B leave the CT mounting bracket in place For models LST91580B through LST93720B this is not applicable The CT mounting bracket is shown in
64. should set the five switches so that they add up to the FLC value However the value assigned to each of the letters is different for each LST starter model Table 13 on the next page shows the value in amps for each of the letters for each LST model Page 48 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 7 Configuration Table 13 Switch Values for Setting Motor Nameplate FLC Value in amps of Switch Labeled LST Model A B Cc D E LST90130B 1 2 4 8 16 LST90250B 2 4 8 16 32 LST90340B LST90390B 3 6 12 24 48 LST90550B LST90730B LST90800B x bi SS idi LST91260B LST91360B 8 16 32 64 128 LST91580B LST91930B 12 24 48 96 192 LST92230B LST92640B 16 32 64 128 256 LST93720B 20 40 80 160 320 7 8 Customizing LST Starter Performance For nearly all applications setting the DIP switch to the appropriate values will produce satisfactory performance However if further refinement is desired five potentiometers are available for customizing the performance of the LST starter These potentiometers allow you to Modify the soft start characteristics by adjusting the ramp time and initial start current e Adjust the sensitivity of the motor overload electronic shearpin and phase loss protective features 7 3 1 Accessing the Potentiometers To access the potentiometers you must remove the cover of the LST starter Follow these steps to accomplish this 1 Disconnect all power from
65. stallation fault or phase sequence fault Start mode In the Start mode the Main Contactor is closed If the output voltage from the starter reaches full voltage the starter will enter the Run mode Run mode In the Run mode both the Main Contactor and the Run relays are closed Soft Stop mode In the Soft Stop mode the Run relay is open and the Main Contactor relay is closed The output voltage is reduced at the rate determined by the stop time parameter soft stop a If the stop time is zero the starter immediately enters the Off mode b If the stop time is greater than zero the starter enters the Off mode as the output voltage approaches zero Trip mode START SIGNAL OUTPUT VOLTAGE In the Trip mode the Main Contactor and Run relays are open and the Trip relay changes to the tripped state SCR conduction is inhibited If Reset is closed the starter enters the Off mode CLOSED OPEN 100 e AMP TIME 0 gt lt MAIN 13 14 CLOSED CONTACTOR i RUN 23 24 CLOSED CONTACTOR OPEN BYPASS TRIP 41 42 44 Page 34 CLOSED OPEN 1998 TB Wood s All Rights Reserved 1276A 1E 9812 H PRESTART CHECKS Figure 15 Relay Output Operation 5 6 Section 5 Connections Sample Application Connections LST starters may be connected and controlled in a variety of ways Four common applications are illustrated in the examples on the following pages to assist you in
66. starter s thyristors Remedy this situation by increasing the motor size or loading Soft Stop does not function 1276A 1E 9812 The soft stop function is not able to work if the start stop circuit opens the contactor when a Stop is called for Correct the stop circuit see Sample Application 2 on page 37 for guidance Ensure that the DIP switch setting for the Soft Stop Ramp Time is set correctly H all switches are set to zero a soft stop will not occur See page 47 for information on setting the DIP switch O 1998 TB Wood s All Rights Reserved Page 57 Section 8 Troubleshooting NOTES Page 58 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 9 Warranty Information 9 1 9 2 Hassle Free Warranty The driving force at TB Wood s is customer service including dealing with unforeseen problems without creating new ones TB Wood s takes the extra step to ensure that ANY problem that occurs to its electronic products is dealt with swiftly and with no hassles to you The Hassle Free Warranty removes the burden of guilt and promises to quickly repair any failed product TB Wood s Incorporated warrants the LST Solid State Starter to be free of defects in parts or workmanship for a period of one year from the date of manufacture If a LST starter fails for any reason excluding physical abuse or repeated failure within the warranty period TB Wood s will promptly repair the starter TB Wood s Incorpor
67. sure that each winding of the motor is continuous Verify each circuit between the starter and motor Failed SCR Page 52 With voltage applied to the input of the starter check the voltage input to output of each phase of the starter If the voltage measured on the phase which has the dim or extinguished LED is zero low or not equal to the other phases this indicates the potential for a failed SCR Disconnect the supply and motor Then use a 500 V analog insulated tester low voltage ohm meters or multi meters are not adequate measure the resistance between input and output on each phase L1 1 to T1 2 L2 3 to T2 4 and L3 5 to T3 6 This resistance should be close to 33 KQ If less than 33 kQ then excess leakage through the SCRs may be occurring If greater than 33 kQ then a control PCB fault or a Firing Loom fault may have occurred O 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 8 Troubleshooting Table 15 Trip LED Flashing and All Phase LEDs Illuminated Equally Possible Cause Invalid phase sequence Action If phase sequence protection is not required ensure that the phase sequence protection switch is set to Off see page 48 and retry It may be necessary to reverse the incoming phase sequence if phase sequence protection is required Frequency out of range Trip LED flashes once if starter is not running or five times if it is running when trip occurs Check the supply frequen
68. t The current then remains at the Start Current Limit until full speed is approached and then falls to Run current levels Figure 5 on the next page provides a graphical representation of a typical soft start A key element of Uni Start is that it dynamically adjusts starter output to match the motor characteristics as they change during starting and stopping Uni Start is operative in both start and stop modes This O 1998 TB Wood s All Rights Reserved 1276A 1E 9812 Section 3 Features Start Current Limit Initial Start Current 100 Motor FLC A Ramp 100 Motor Speed Figure 5 Typical Soft Start with an LST Starter eliminates the motor instability sometimes experienced with ordinary soft start systems Uni Start provides particular advantage in pumping applications where both starting and stopping times can be adjusted to minimize fluid hammer without the need for dedicated pump start models The DIP switch is used to set the Start Current Limit and the motor FLC see page 48 for further information The required setting for the Start Current Limit is installation dependent and should be set such that 1 At a minimum the motor supplied start current should be sufficient to enable it to produce an adequate torque to easily start the connected load and 2 Desired starting performance is obtained Note that setting the DIP switch to the appropriate values should produce satisfactory performance for
69. uxiliary Trip and Motor Thermistor T1 2 T2 4 T4 6 cover removed Figure 3 LST Starter LED Indicators and Terminal Connections 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 11 Section 3 Features 3 2 3 3 Page 12 Local Control Pushbuttons Towards the top of the LST starter are three pushbuttons These pushbuttons provide local control for Start Stop and Reset functions Their operation is not indicated by the control input LED indicators located near the remote control input terminals Terminals C63 and C64 may be used to switch between local and remote control LED Indicators 3 3 1 Status Indicators Four LED indicators provide information on the operation of the LST starter These indicators provide the following information Power yellow Control voltage is present Start green The LST starter is supplying voltage to the output and the Main Contactor M C relay is closed The starter may be in the Soft Start Run or Soft Stop modes Run green The LST starter is supplying full output voltage and the Run relay is closed Trip red The LST starter has tripped and the Trip relay has operated A manual reset is required to restore operation The LED will flash multiple times in quick succession and then pause and repeat to indicate a particular fault see the Troubleshooting section starting on page 51 for more information 3 3 2 Remote Control Input Indicators Three LED indi
70. ypass contactor should be used to control the bypass contactor If using a bypass contactor Connect the bypass contactor between the starter s inputs and outputs ensuring that with the contactor closed L1 1 connects to T1 2 L2 3 connects to T2 4 and L3 5 connects to T3 6 Connect the coil of the bypass contactor through the starter s Run relay outputs to the control voltage K1M SUPPLY MOTOR 3 PHASE BYPASS CONTACTOR CONTROL SUPPLY Figure 12 Typical Wiring for a Bypass Contactor 1276A 1E 9812 1998 TB Wood s All Rights Reserved Page 27 Section 5 Connections 5 4 3 Power Factor Correction CAUTION EQUIPMENT DAMAGE HAZARD Under no circumstances should power factor correction capacitors be connected between the LST Solid State Starter and the motor Failure to follow this instruction can result in injury or equipment damage ATTENTION RISQUE DE DOMMAGES MAT RIELS Les condensateurs de correction du facteur de puissance ne doivent jamais tre raccord s entre le d marreur transistoris LST et le moteur Si cette directive n est pas respect e cela peut entra ner des blessures corporelles ou des dommages mat riels If static power factor correction is used it must be connected to the supply side of the LST starter Ideally power factor correction capacitors should be connected to the supply using a dedicated contactor which is energized once the motor has started Addi

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