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460 series user manual iss 2

1. my Three phase load in A or Y 3 wire configuration Figure 3 16 2 phase control configuration of a thyristor unit and a solid state contactor PLF option fan cooled 380 V supply 460 User Manual 325 Cabling EMC filter connection 2 phase control For two phase control application three phase loads connected in star with neutral or in closed delta use the EMC external series three phase filter The Eurotherm filter ordering codes see page III Line protection EMC FILTER Main circuit breaker 1A Fuses 1A Fuses OJOJO rere lototo ototo 51 5253 51 52 53 ae ees 460 series 450 series thyristor solid state 5 unit 5 contactor 6 OMasterQ OSlaveO Ih Three phase load in A or Y 3 wire configuration Figure 3 17 Two phase control power configuration with the EMC series t
2. I 0 Current image Control output l Voltage l image l output l l Inhibition f4 Enable Control terminal block Figure 3 13 Retransmission signal configuration 460 User Manual 3 19 Cabling Inhibition Inhibition means that the thyristors cannot fire whatever the control signal The inhibition input is available between terminal 16 and terminal 6 0 V The inhibition is operative when a dc voltage is applied to terminal 16 The inhibition signal must be between 4 V and 32 V relative to terminal 6 0 V The inhibition can be performed by connecting terminal 16 to terminal 12 10 V on the same control terminal block To prevent the activation of the inhibition terminal 16 Inhibit input should not be connected or alternatively apply a dc voltage of between 2 V and 1 V Control OSlave firingO output 1 Inhibition Enable Figure 3 14 Inhibition and Slave firing output terminals on the control terminal block Slave firing output The logic signal 10 Vdc 10 mA max available between terminals 13 Slave firing output and 6 0 V is used to drive solid state contactors The capacity of this output is characterised by the number of Slaves as follows e one 450 series solid state contactor standard input e four 450 series solid state
3. Danger AN Never use a thyristor unit with a supply voltage greater than the nominal voltage of the thyristor unit as specified in the coding Dangerous live parts can be accessible when the unit is dismounted from its baseplate Access to internal components of the thyristor unit is prohibited to users who are not authorised to work in industrial low voltage electrical environments The temperature of the heatsink can be greater than 100 C Avoid any contact with the heatsink even momentarily when the A thyristor unit is operating The heatsink remains hot for approximately 15 min after the unit has been switched off The thyristor unit is delivered fully configured according to the order code 6 2 460 User Manual Commissioning CHECKING THE CHARACTERISTICS Attention N Before connecting the unit to an electrical supply make sure that the identification code of the thyristor unit corresponds to the coding specified in the order and that the characteristics of the thyristor unit are compatible with the installation Load current The maximum load current must be less than or egual to the value of the nominal current of the thyristor unit taking the load and supply variations into account In three phase operation if 3 identical loads are configured in closed delta the line current of the thyristor unit both Master and Slave is N3 times as high as the current of each arm of the load Su
4. The 20 way switch of the diagnostic unit is used to display the values of the thyristor unit and feedback parameters on its digital display The unit displays two decimal places in order to permit the precise indication of the selected values Table 6 1 gives the description of each position in the diagnostic unit and the typical values of the signals measured The diagnostic unit possesses a ribbon cable which is plugged into the 20 pin connector diagnostic connector provided on the front fascia of the thyristor unit The signals from the diagnostic connector may also be viewed using an oscilloscope Important The values measured are dc mean values 6 4 460 User Manual Commissioning Diagnostic socked Connection ribbon cable DLA DAlLaAlLaA E E beur Lh OM i e O Test z limit J 240V 75 Limit Fuse fail D f fusible A ribbon a Digital display diagnostic unit EUROTHERM Oscilloscope connection terminals insulated from power 9 Vdc Battery or rechargeable battery Battery charger Figure 6 1 Connection of the EUROTHERM type 260 diagnostic unit to a 460 series thyristor unit 460 User Manual Commissioning
5. Operation Chapter 5 OPERATION Contents page Thyristor firing modes eee ccc ee ke ke ke ee ee ee ge ee ee 5 2 General 5 2 Phase angle mode 5 2 Burst firing mode 5 3 Single cycle mode 5 3 Modulation period we O 4 Softstait end sie ESE SES ES EE Ee Ee wee 5 5 Over current elimination for the inductive load we 5 6 GOntrol rescence cs OE EE ccaeeesiesecee ees 5 7 Feedback fUN ction ccccccccccccssseeeeceeeesssseeeeeeesesssneeeeeeeesessseeees 5 7 Supply voltage variation compensation we 5 8 Selective trigger pulse locking 4 wee 5 9 Current limit EE SE Eis AE EE GEE GER oe AE Ke EO EES AR eves 5 10 Linear current limit ee Re ee Re ee ee ee 5 10 Threshold current limit ese ee RR ee Re 5 11 Partial load failure detection ee ke AA RA de 5 12 Retransmission suis SS GESE SERE ED Ge AA AA GE Ee EER Ge Se RE eke Ee eg de Load current image Load voltage image Inhibition ese ee Master Slave operation 460 User Manual 51 Operation Chapter 5 OPERATION THYRISTOR FIRING MODES General The 460 series thyristor units have the following thyristor firing modes e Phase angle Burst fast slow or single cycle with or without soft start start and end They can be reconfigured by the user as described in the Configuration chapter Phase angle mode In Phase angle mode the power transmitted to the loa
6. Position Description Current image nominal load 0 of setpoint O 0 50 of setpoint 90 100 of setpoint 180 Manual input if used PLF output not in alarm In alarm status External setpoint Example 0 10 V 5V Threshold current limit 0 to 100 approx 0 to 10 V Current image for PLF 2 5 V Load voltage image 2 25 V Amplified setpoint 2 5 V Slave Firing O P output Firing demand 0 V mean 1V peak not used 8 4 V 10V reference 10 V0 1 V Auxiliary voltage image 20 V Pulse output 20 V No pulses 20 V pulses 20 V pulses 15 V supply 15 V 150mV Oscillator input OV 1 2 V 6 4 V peak 90 pulses 1 2 V 6 4 V peak 90 pulses 15 V supply 0 voltage crossing pulse 15 V 150mV 10 5 V 12V peak 0 6ms OV OV Saw tooth generator 3 6V 8 4V peak 10ms Enable lt 10 V Table 6 1 Description of the positions of the EUROTHERM type 260 diagnostic unit Thyristor firing angle variation 6 6 460 User Manual Commissioning Position Description Current image nominal load 0 of setpoint 50 of setpoint Modulation 2 5 V 100 of setpoint Manual input if used 2 5 V PLF output not in alarm In alarm status 13 5 V 12 6 V External setpoint Example 0 5 V
7. 2 5 V Threshold current limit 0 to 100 approx 0 to 10 V Current image for PLF OV Modulation 0 4 6 V Load voltage image OV Modulation 0 4 3 V Amplified setpoint OV 2 5 V 5V Slave Firing O P output OV Modulation 0 13 5V 10 2 V 0 13 5 V Power demand 0 V mean 1V peak 6 25 V 12 5 V peak 12 5 V 10V reference 10 V 0 1 V Auxiliary voltage image 20 V Pulse output 20 V No pulses 20 V pulses 15 V supply 15 V 150mV Oscillator input OV 6 4 V peak 15 V supply 15 V 150mV 0 voltage crossing pulse 10 5 V 12 5V peak 0 6ms OV OV Saw tooth generator Not used Enable lt 10V Table 6 2 Description of the positions of the EUROTHERM type 260 diagnostic unit Fast cycle and Single cycle 460 User Manual 67 Commissioning PRELIMINARY ADJUSTMENTS The preliminary adjustment is used to adapt the first thyristor firings to the type of load used e Forresistive loads with low resistance variations firing at zero voltage does not generate steep voltage fronts thus minimising the electromagnetic interference produced e For resistive loads with high resistance variations use of the Burst firing modes with the soft start reduces the current requirement when the load is cold with alow resistance e Forinductive loads the fir
8. L lt TM gt Figure 5 2 Periods of a burst firing cycle Single cycle mode The Burst firing mode with a single firing or non firing period is called the Single cycle mode 460 User Manual 53 Operation Modulation period The modulation period in Burst firing mode is variable according to the output power Due to this type of feedback the 460 unit possesses adjustment precision adapted to each specific setpoint zone e At 50 power the typical value of the modulation period is 0 8 s for the Fast cycle 8 s for the Slow cycle e Fora zone below 50 of the maximum setpoint the firing period decreases and the modulation period increases e For a power zone above 50 the non firing period decreases as the modulation period For example in the Fast cycle e for 5 power T 260 ms T 5s e for 90 power T 2 2s T 2 5 S 12s Modulation 10s 6s TE INF 0 4s Distributed power Figure 5 3 Modulation period as a function of power Fast cycle 5 4 460 User Manual Operation Soft start end Soft operation start or start and end can be configured in the Slow cycle and Fast cycle Burst firing modes The soft start duration Tg is the time taken for the thyristor unit output power to change from 0 to 100 by varying the thyristor firing angle from 0 to full firing The soft end duration T e is the time take for the thyristor unit out
9. an external adjustment potentiometer e by a 0 10 V external dc voltage When the threshold limit by potentiometer or by voltage is not used terminal 14 of the driver board user terminal block must be connected directly to the 10 V user voltage terminal 12 Otherwise the current limit is at zero and the thyristor unit cannot output Without linear current limit Without linear current limit 80 limit threshold 75 linear limit 60 limit threshold 7 zZ 7 7 Resulting limit 0 50 100 0 50 100 Setpoint Setpoint Figure 5 8 Exemple of the current limit e threshold current limit a simultaneous use of 2 types of limit b 460 User Manual 541 Operation PARTIAL LOAD FAILURE DETECTION The partial load failure PLF alarm detects an increase in the load impedance due to the failure of heating elements for example The sensitivity of the PLF circuit is used to detect the increase in the load impedance to 20 which detects the failure of one element out of 5 identical elements mounted in parallel On the 460 thyristor unit the alarm is indicated e by an indicator light mounted on the front fascia and labelled Load Fail lit when a partial load failure is detected e by the alarm relay switch switch output is available on terminals 41 and 42 on the user terminal block at the top left hand corner of the thyristor unit The alarm relay is non energised in
10. currents above 100 A 460 User Manual Installation DIMENSIONS The dimensions of the 460 series thyristor units are given in figure 2 1 and table 2 1 Tal dir Test OU Fuse fail D f fusible 240V 75A EER Figure 2 1 Overall dimensions Table 2 1 Overall dimensions and weight Height H mm Width W mm Depth D mm 460 User Manual 2 3 Installation MECHANICAL MOUNTING 460 series units are slotted into a steel baseplate located at the rear of the unit The baseplate can be mounted on a pair of asymmetric DIN rails e on a vertical wall 0 461 42 462 Quarter turn R 75 463 464 locking A A 43 X 178 105 X v m j g 149 Baseplate 2 DIN ihai a5 178 rails Rotati oles 04 4 for ee 2 holes for 461 464 Figure 2 2 Dimensions for attachment to a vertical wall mm To mount the unit e tilt the unit forwards to approximately 20 degrees from the horizontal e fit the rotation pin into the slot in the baseplate e raise the unit to the horizontal e lock by a quarter of a turn To dismount the unit e unlock the up
11. front fascia The 460 power thyristor units have two types of current limit e linear limit adjustment using potentiometer on front fascia e threshold limit adjustment using external potentiometer The partial load failure PLF detection circuit detects 25 increases in load impedance independently from the supply voltage variation The PLF detection is adjusted using a potentiometer on the front fascia for the real load current used The PLF alarm is signalled by the alarm relay switch and by the Load Fail indicator light on the front fascia Thermal protection is provided by a thermal switch which detects if the fan has stopped or the heatsink is overheated The 460 thyristor unit is equipped with active operation validation An external 10 V voltage 32 V max or a switch connected to the user terminal block is used to inhibit the thyristor unit 460 User Manual 15 Identification TECHNICAL DATA AN The 460 is a power thyristor unit designed to control an industral single phase load with a high current reduirement at start up using thyristors Attention lt is the user s responsibility to ensure that the nominal values of the thyristor unit are compatible with the conditions of installation and operation before commissioning the thyristor unit Power Nominal current Nominal line to line voltage Supply freguency Dissipated power Cooling Fan Load Residual current Environment O
12. input external Signal ese ee 4 5 Manual nput cc fine N telah aia iin 4 5 Thyristor firing mode ees ee ee ee Re ee Re ee ee 4 6 FOQUONCY AE OE RE 4 6 460 User Manual 4 1 Configuration Chapter 4 CONFIGURATION SAFETY DURING CONFIGURATION The thyristor unit is configured using miniature switches and mobile jumpers located on the driverboard Important A The unit is supplied fully configured in accordance with the code on the identification label This chapter is included in order to e check that the configuration is compatible with the application e modify if necessary certain characteristics of the unit on site Danger For safety reasons the reconfiguration of the thyristor unit using jumpers AN must be performed with the unit switched off and by qualified personnel only Before starting the reconfiguration procedure check that the thyristor unit is insulated and that an occasional power up is impossible After the reconfiguration of the unit correct the codes on the identification label to prevent any maintenance problems later 4 2 460 User Manual Configuration CONFIGURATION OF THE DR IVER BOARD The 460 series thyristor units are fitted with a strip of miniature switches and two jumpers used to select e the input type e the desired thyristor firing mode the frequency used 50 or 60 Hz These miniature switches and the configuration jumpers are located on
13. load in Burst mode transformer primary with a resistive load having a low resistance variation on the secondary use the special 669 no current limit or PLF 6 10 460 User Manual Commissioning Ouarter turn locking PLF detection indicator light Seuil I limit PLF detection Limit adjustment PLE 14 adjustment test Current limit l adjustment i Fuse fail Diagnostic S socked D f fusible Internal fuse failure indicator light 240 V 75A Figure 6 2 Front fascia of the 460 thyristor unit 460 User Manual 611 Commissioning PARTIAL LOAD FAILURE DETECTION ADJUSTMENT The partial load failure PLF detection is adjusted using the potentiometer labelled Adjust Seuil on the front fascia see figure 6 2 The purpose of this adjustment is to adapt the PLF detection with the maximum sensitivity to the real thyristor unit load To guarantee correct operation of the PLF detection circuit the load current must not be less than 10 of the thyristor unit nominal current in the case of use of a bulb as a load for a thyristor unit test in the workshop the PLF detection indicator light Fail D faut is always lit During commissioning the following adjustment must be made First of all make sure that the thyristor unit is connected correctly and that the thyristors are in permanent firing mode Turn the PLF detection adjustment potentiometer completely anti cl
14. the last cable to be disconnected The safety earth is connected to the screw located on the strip provided for this purpose in the top part of the unit behind the power terminals and labelled as follows ss Attention To ensure that the 460 unit is grounded correctly make sure that it is attached to the reference ground plane panel or bulkhead If this is not the case it is necessary to add a ground connection no more than 10 cm long between the ground connection and the reference ground plane Danger The purpose of this connection is to guarantee correct ground continuity It is not in any circumstances a substitute for the safety earth connection 3 2 460 User Manual Cabling FIXING THE POWER CABLES The external cables are connected to the terminal blocks on the baseplate once the baseplate has been fixed with the unit disconnected The power cables are attached to the power terminal blocks marked L Line and rn Load located on the lower part of the unit The power and earth cables are connected to tunnel terminal blocks 15 A to 100 A or screw terminals 125 A and 150 A Above 125 A it is necessary to connect the power cables using round lugs The capacities of the power terminals are shown in table 3 1 The tightening torques must comply with the limit values shown in the same table A Attention Tighten the power connections correctly Poor tightening ca
15. 00 40 A and 55 A FILTER MON 63A 00 FILTER TRI 63A 00 75 Aand 100A FILTER MON 100A 00 FILTER TRI 100A 00 125A and 150A 2 x FILTER MON 100A 00 Contact Eurotherm in parallel VALIDATION BY COMPETENT BODY In order to guarantee the best service Eurotherm has validated the compliance of the 460 products with EMC test standards through design and laboratory tests that have been validated with a Technical Construction File by a Competent Body LCIE Labora toire Central des Industries flectriques EMC INSTALLATION GUIDE In order to help you reduce risks related to the effects of electromagneticinterference depending on the installation of the product Eurotherm can supply you with the EMC Installation Guide Part No HA025464 This guide gives the rules generally applicable for Electromagnetic compatibility 460 User Manual Ill MANUALS IN USE This 460 User Manual Part No HA 174913 ENG intended for the 460 series power thyristor units manufactured beginning January 1996 The 451 455 461 User Manual Part No HA174485 is valid for products manufactured before this date PRECAUTIONS Important precautions and special information are indicated in the manual by two symbols This symbol means that failure to take note of the information may have serious consequences for the safety of personnel and may DANGER even result in the risk of electrocution N This symbol means that failure to take note of the informat
16. 8500 MODEL 464 1 17 28 43 073 002 83 76 00 SERIAL No LC9999 001 001 12 95 RANGE 125A 440V ELECTRONICS SUPPLY 350 450V 200 260V ANY OTHER FUSE INVALIDATES GUARANTEE FERRAZ C99960 I R EE1000 150 BRUSH 150EET MADE IN FRANCE Figure 1 2 Example of an identification label for a model 464 thyristor unit The information corresponds to a 464 thyristor unit nominal current 125 A nominal voltage 440 V electronics supply in the range 350 to 450 V 4 20 mA input phase angle firing PLF alarm switch closed in alarm status unit delivered without baseplate The configuration label presents the factory settings The standard configuration 4 20 mA input Phase angle firing mode and frequency 50 Hz is shown If the configuration is different from the standard it is shown in the appropriate field In this case the position of the miniature configuration switches for the selected input signal and firing mode are shown The information on the configuration label is shown in French and in English Attention N Following any reconfiguration on the part of the user there is no guarantee that the thyristor unit and this information corresponds to the information related to the unit coding 1 12 460 User Manual Installation Chapter 2 INSTALLATION Contents page Safety during installation ee ee Re Re Re 2 2 DIMENSIONS 2 ses EE AE ER OE EE 2 3 Mechanical mounting iese ee ee Re Re Re 2 4 460 U
17. 9 TAYrStomuUnit caceh a tiie cl os 1 9 BAS plate ects EER EE ayes ch out ceed oe ARE a 1 10 Short or full code ee EE EE ER Re ee ee ee 1 10 Coding example ee ee ee Re ee Re ee ee ee 1 11 460 series thyristor unit and installation parafnelers NRS EE Ee eg ETER tes Ee ee ed De sees 1 11 Thyristor unit coding iese ee Re ee ee 1 11 Serial number labels ee EE EE ER ER ER ee ee ee 1 12 460 User Manual H Identification Chapter1 IDENTIFYING THE THYRISTOR UNITS GENERAL INTRODUCTION TO THE 460 SERIES The 460 series power thyristor units are designed for the control of industrial single phase loads The 460 series is designed to control e inductive loads transformer primary circuits in particular or high temperature coefficient resistive loads A thyristor unit contains a pair of thyristors mounted in parallel on a heat dissipator The 460 series thyristors control currents between 15 A and 150 A The nominal line to line voltage varies between 120 V and 500 V The control signal which can be reconfigured by the user has three voltage levels 0 5 V 0 10 V and 1 5 V and four current levels 0 5 mA 0 10 mA 0 20 mA and 4 20 mA Manual control using external potentiometers is possible The 460 series is equipped with the following functions e electrical power control of inductive and resistive loads e different thyristor firing modes e decrease in the current requirement of high tempera
18. IBITION The 460 thyristor units possess an active operation inhibition which reguires a voltage to be applied to a control terminal block The absence of the inhibition voltage enables the operation of the thyristor unit The inhibition input is available between terminal 16 Enable input and terminal 6 0 V of the driver board The inhibition is active when a dc voltage of 10 V 4 V minimum 32 V maximum relative to terminal 6 0 V is applied to terminal 16 Inhibition see page 3 19 To inhibit the thyristor unit the Enable input terminal can be connected by a normally closed switch to the 10 V user voltage terminal 12 If the thyristor unit is inhibited the thyristor firing signals are suppressed whatever the input signal To enable the thyristor unit terminal 16 must not be connected to a voltage specified above MASTER SLAVE OPERATION The logic signal 10 Vdc 10 mA is available between terminals 13 Slave Output and 6 OV when the 460 thyristor unit is in slow cycle fast cycle or single cycle firing mode The Slave output is used to control solid state contactors Using this logic signal output it is possible to configure a 460 thyristor unit Master for Master Slave operation controlling one or two 450 series solid state contactors Slaves for the economical control of single phase or three phase loads see Cabling chapter 5 14 460 User Manual Commissioning Chapt
19. Power thyristor units 460 series Control of single phase resistive and inductive loads User Manual Copyright Eurotherm Automation 1996 All rights reserved All reproduction or transmission in any form or using any procedure electronic or mechanical including photocopying and recording without the written permission of EUROTHERM AUTOMATION is strictly prohibited EUROTHERM AUTOMATION have taken particular care to ensure the accuracy of these specifications However in order to maintain our technological lead we are dedicated to the continual improvement of our products and this may lead to modifications or omissions in the current specifications We cannot be held responsible for any material or bodily damage losses or costs incurred Part No HA 174913 ENG Issue2 Printed in France 11 96 CE EUROPEAN DIRECTIVES SAFETY The 460 products installed and used in accordance with this User Manual are designedto comply with the essential protection requirements of the European Low Voltage Directive 73 23 EEC dated 19 02 73 amended by Directive 93 68 EEC dated 22 07 93 CE MARK The CE Mark of 460 products implies that the essential protection requirements of the European Low Voltage Directive are observed The 460 Technical Construction File is approved by a Notified Body LCIE Laboratoire Central des Industries flectriques C DECLARATION OF CONFORMITY A CE Declaration of Conformity is available on request For fur
20. V 1 5 V or 0 10 V Current 0 5 mA 0 10 mA 0 20 mA or 4 20 mA Voltage 100 KO Current 250 Q or 1000 Q External potentiometer 10 KQ The following can be reconfigured by the user e Phase angle e Single firing burst firing with a firing or non firing cycle e Fast cycle typical modulation time at 50 power 0 8 s e Slow cycle typical modulation time at 50 power 8 s e Fast cycle with adjustable soft start between 0 and 250 ms with or without soft end e Slow cycle with adjustable soft start between 0 and 250 ms with or without soft end For inductive loads the delayed firing of the first alternation of the burst mode firing without soft operation eliminates transient currents Using external switch or external voltage on the control terminal block Response time enable 2 s inhibition lt 25 ms Connector for diagnostic unit used to adjust and control the thyristor unit using 20 test signals Squared load current or squared voltage control Supply variation compensation Shielded cable connected to ground at both extremities 0 5 mm to 2 5 mm wires Tightening 0 7 N m The control terminals are insulated from the power and the load circuit 460 User Manual Identification Retransmissions Signal outputs Current limit Linear limit Threshold limit Retransmission output on the control terminal block e Instantaneous load current The full wave rectified signal 0 to 5 V proportion
21. al to the real load current image e Instantaneous load voltage Proportional load current limit 0 to 110 of the nominal current Adjustment using potentiometer on front fascia Maximum load current limit 0 to 110 of the nominal current Adjustment possible using an external potentiometer or an external voltage Partial load failure detection Alarm Test Signalling Slave firing output 20 current decrease detection Adjustment on front fascia using Adjust Seuil potentiometer Using front fascia Test push button Load Fail indicator light on the front fascia Alarm relay switch open in alarm status in standard version Switch closed in alarm status option 83 e Logic signal 10 Vdc 10 mA max available on the control terminal block Attention Due to the continual improvement of products Eurotherm may be required to N modify specifications without prior notice For any further information and in the event of doubt contact your Eurotherm Office 1 8 460 User Manual Identification CODING Thyristor unit Series Nominal Nominal Electronics supply Input Thyristor firing Options 00 Current voltage voltage signal mode Nominal Input signal Code Current Without pulse locking 461 With pulse locking 462 Thyristor firing mode 463 464 Phase angle Single cycle Nominal voltage Fast cycle 0 8 s 115 V Fast cycle 240 V wit
22. alarm status when the thyristor unit power is on The alarm switch cut off capacity 0 25 A at 250 Vac or 30 Vdc in the standard version is open in alarm status or in the event of a supply failure The switch cut off capacity must not exceed 250 V in any circumstances As an option code 83 this switch is closed in alarm status The PLF alarm is acknowledged either by switching off the thyristor unit or by a return to the nominal current 5 12 460 User Manual Operation RETRANSMISSION The 460 thyristor units possess retransmission of load current and voltage images in the form of a signal available on the control terminal block Load current image The load current retransmission signal is available on the control terminal block between terminals 3 Current image and 6 0V The current image can be used for tests or for an external measurement external impedance 20 kQ max The full wave rectified output signal is proportional to the instantaneous load current 4 8V mean for the nominal current of the thyristor unit in full firing Load voltage image The load voltage retransmission signal is available between terminals 15 Load voltage image and 6 0V on the user terminal block on the driver board This is a full wave rectified signal 4 3 V for the load voltage in full firing generated using the electronics power supply external impedance 5 kQ max 460 User Manual 513 Operation INH
23. ave 3 single phase transformers Three phase transformer Three 460 thyristor units or one TC3001 series three phase thyristor unit One TC3001 series three phase thyristor unit Star without neutral Closed delta Direct One 460 thyristor unit plus one two phase control 450 solid state contactor Master Slave Closed delta Star with neutral Open delta Three phase transformer Direct or 3 single phase transformers Three phase transformer One TC 3001 series three phase thyristor unit or one TC2001 series thyristor unit in two phase control Three 460 thyristor units in phase angle with current limit or one TC3001 three phase thyristor unit One TC3001 thyristor unit Table 3 4 Possible three phase configurations 460 User Manual Cabling The Slave logic output signal is provided on the control terminal block of the 460 for Master Slave operation with solid state contactors The connection of the reference voltage for 450 series solid state contactors is described in the 450 User Manual Part N HA 174910 ENG Attention For two phase control of a 3 phase application 460 Master and 450 Slave and 2 with 450 series PLF option auxiliary supply voltage must be the same as 3 phase line to line voltage The inputs of the 450 solid state contactors should be configured for 10 V logic signals and connected in parallel or in series Attenti
24. contactors TTL inputs in parallel e four 450 series solid state contactors Multi control inputs in series 3 20 460 User Manual Cabling SINGLE PHASE LOAD WIRING DIAGRAM The load current passes through the power terminals L Line and amp Load The other load end is either connected to the neutral or the 2nd phase of the supply depending on the power configuration The terminal L must be connected to the line of the supply It is essential to comply with this configuration in order to avoid incorrect operation The 51 to 53 terminals must be connected depending on the supply voltage see page 3 6 Line Line protection and E main circuit breaker 230 V user installation Neutral l External fuse for 150A PLF switch 1 A fuse Slee L1 Voltage other than 230 V L2 51 52 53 41 42 51 52 53 wy Ae HL 3 Gil 4 Safety earth Figure 3 15 460 thyristor unit single phase configuration controlled by an external signal 460 User Manual 321 Cabling THREE PHASE LOAD WIRING DIAGRAMS Although the 460 series thyristor units are single phase units they can be used to control three phase units In three phase operation the configuration of the power and the
25. d It will be automatically reenabled if the voltage returns to a value greater than or equal to 85 of its nominal value A compensation circuit simultaneously adjusts the thyristor firing time as a function of the supply variations This compensation prevents power fluctuations and the intervention of the feedback loop enabling a quicker response 5 8 460 User Manual Operation Selective trigger pulse locking The 460 thyristor unit thyristors are fired by a trigger pulse train of a maximum duration of5 ms In most single phase applications it is possible to send trigger pulses every 10 ms so that the thyristors are polarised in direct mode positive anode in relation to the cathode or in inverse mode negative anode Each thyristor is only fired when its voltage is positive when it is negative the anti parallel thyristor is fired In certain applications the trigger pulses on the polarised thyristor in inverse mode can lead to operating problems firing instability fuse blow out It is therefore necessary to eliminate the trigger pulses when the thyristor is polarised in inverse mode This function is performed by the selective trigger pulse locking circuit available for 460 thyristor units This selective trigger pulse locking is essential for configurations in which multiple thyristor units are distributed between the phases of a three phase supply and have an electrical configuration which could induce a volta
26. d is controlled by firing the thyristors for a part of the supply voltage alternation see figure 5 1 The firing angle varies in the same direction as the input signal with the control system The power emitted is not a linear function of the firing angle Resistive Supply load voltage voltage Suppl ke Inductive load voltage at Figure 5 1 Phase angle firing mode 5 2 460 User Manual Operation Burst firing mode The Burst firing mode is a proportional cycle which consists of supplying a series of complete supply cycles to the load Thyristor firing and non firing are synchronised with the supply and are performed at zero voltage for a resistive load This firing eliminates the steep fronts of the supply voltage applied to the load does not produce interference on the supply and in particular prevents the generation of parasites In the Burst firing thyristor firing mode the power supplied to the load depends on firing periods T and non firing periods Typ The load power is proportional to the firing rate t and is defined by the ratio of the thyristor firing period T and the modulation period Tu Ty Typ The firing rate or cyclic ratio is expressed by the following ratio Tr Tr Typ The load power can be expressed by P T7 Pyray where P represents the load power during thyristor firing MAX Load voltage A t 0 i TF gt lt TNE gt
27. d ramp absent see table 6 4 e Switch on the thyristor unit e On the external input terminal 4 of the control terminal block apply a signal corresponding to 0 of the control signal Using an ammeter measure the RMS current and check that the load current does not pass e On the external input terminal 4 or manual input terminal 5 apply a signal corresponding to 100 of the control signal Using an ammeter measure the RMS current and check that the current is equal to the nominal load current Resistive load with high resistance variations For loads with high temperature coefficients use the soft start of Phase angle thyristor firing mode The start or start and end time is adjusted using potentiometer P4 on the driver board for the following thyristor firing modes e slow cycle with soft start code 056 e fast cycle with soft start code 055 e slow cycle with soft start and end code SDS e fast cycle with soft start and end code SDF The soft start or start and end ramp can be adjusted between 0 and 250 ms The maximum ramp is obtained with potentiometer P4 turned completely clockwise When the unit is shipped the potentiometer is adjusted to its maximum position see table 6 4 In the case of the control of a load with very high resistance variations as a function of temperature Kanthal Super for example use the Special 677 except for Phase angle firing 460 User Manual 69 Commissioni
28. e voltage If the short code is used the 460 thyristor unit is supplied with the standard configuration e the input configured for 4 20 mA e the thyristor firing mode firing angle variation Phase angle e frequency 50 Hz e the thyristor firing delay potentiometer on maximum maximum start ramp 1 10 460 User Manual Identification CODING EXAMPLE 460 series thyristor unit and installation parameters Nominal load current 45 amperes Nominal supply voltage 440 volts line to line 60 Hz Electronics supply voltage 440 Vac Input signal 0 10 volts Firing mode Fast cycle burst mode firing with soft start Triggering With selective pulse locking Options e Partial load failure detection switch closed in alarm status e Unit without baseplate Thyristor unit coding 462 062 28 47 060 055 69 83 76 00 Attention N The nominal voltage of the 460 series thyristor unit must correspond to the supply voltage used to prevent problems of non operation for voltages lower than 70 of the nominal voltage 460 User Manual HI Identification SERIAL NUMBER LABELS An identification label specifying the coding of the thyristor unit and a configuration label give all the information relating to the factory settings of the thyristor unit An identification label is externally located at the top of the right hand side panel of the unit El EUROTHERM 2 20 WORTHING ENGLAND 1903 26
29. electronics power Supply voltages is determined by the load type and configuration Three phase configurations use 46 series thyristor units or 460 thyristors which drive the 450 series solid state contactors in Master Slave operation Important Three phase operation of three 460 power thyristor units is only possible for a load in a star with neutral 4 wire configuration or an open delta 6 wire configuration It is preferable to use a three phase Eurotherm TC3001 series thyristor unit e In the case of a3 wire configuration load in start without neutral or in closed delta it is not possible to control the three phases with 460 thyristor units Instead use a 460 thyristor unit Master and two 450 solid state contactors Slaves e In three phase Master Slave operation only Burst thyristor firing modes Single cycle fast or slow without soft start or end are possible e It is essential to supply the control electronics with a voltage which is in phase with the supply voltage for the loads and the thyristors 3 22 460 User Manual Cabling The choice of the three phase configuration can be made according to the guidelines in the following table Low temperature coefficient High temperature coefficient Type of configuration Star with neutral Open delta Unit Load connection Three phase configuration One 460 thyristor unit plus two 450 solid state contactors Master Sl
30. er 6 COMMISSIONING PROCEDURE Contents Commissioning procedure safety ee Re Checking the characteristics iese ee ee ee ke ee Load ufreNE 2 EER ETE DE EN ARE ER DE REGSE Ge ts Supply voltage ere Electronics supply voltage e ees esse ee ese ee ee ee ee ee ee Te ESRUE ORR GR EE OE OE Partial load failure detection ese ee ee DiagnostE UNIE ist EE tien EE Ee GE de GE n eg Preliminary adjustments iese ee ee ee Re ee ee ee Resistive load with low resistance variations Resistive load with high resistance variations Non saturable inductive load iese ee ee Partial load failure detection adjustment sees ees Current limit adjustment ese ee ee Re ee Bl AE EE RE OE EE ONE Threshold limits EE EE IE ER ee eg Re Ee Gee ig Checks in the event of abnormal operation 460 User Manual 61 Commissioning Chapter 6 COMMISSIONING PROCEDURE Read this chapter carefully before commissioning the thyristor unit COMMISSIONNING PROCEDURE SAFETY Important N Eurotherm cannot be held responsible for any damage to persons or property or for any financial loss or costs resulting from the incorrect use of the product or the failure to observe the instructions contained in this manual It is therefore the user s responsibility to ensure that all the nominal values of the power unit are compatible with the conditions of use and installation before commissioning the unit
31. er supply powers the following e the electronic control e the fan for fan cooled units e the partial load failure detection circuit Terminal 51 is the neutral or the reference phase Terminal 52 is used when the electronic control circuit is powered at 230 V in the voltage range 200 V to 260 V Terminals 51 and 53 are used for voltages outside the range 200 260 V 110 or 400 V for example The electronics power supply voltage is specified in the unit code see page 1 9 Attention N The phases arriving on terminals 51 to 53 must be identical to those on the unit s power terminals especially if several units are distributed amongst several phases of a three phase network The control must be powered up after the power or at the same time The control must be powered down before or at the same time as the power The electronics power supply is protected from the electrical disturbances on the supply network in common mode Each connection wire from the electronics power supply to a phase must be protected by a 1A fuse 3 6 460 User Manual Cabling Alarm relay switch The connection of the partial load failure detection relay switch PLF alarm which signals the active alarm status is made on the user terminal block located in the upper part of the thyristor unit on the left The switch output terminals are marked 41 and 42 on the terminal block label The PLF alarm relay is non energised in a
32. ge phase shift For example e control of heating electrodes in transformer secondary coil immersed in the same molten glass bath e load in star with neutral with the central point of the star connected to the supply neutral by a wire of a non negligible resistance with reference to that of the load 460 User Manual 59 Operation CURRENT LIMIT TThe 460 thyristor units possess two types of current limit with the load current measurement on P alinear current limit and e a threshold current limit These two limits are independent Linear current limit This function linear limits the squared RMS load current P In current limit the correspondence between the load current and the input signal can be adjusted using the potentiometer labelled I limit Limit I on the front fascia 125 100 50 Without current limit 120 2 110 Aminal current 1009 6 linear limit 75 limit 50 limit 50 100 Setpoint Figure 5 7 Linear current limit The power feedback in V2 and the current limit in P provide the best control in all the feedback zones 5 10 460 User Manual Operation Threshold current limit This type of limit is used to limit the load current to a desired value independently of the input signal and the linear current limit The Current limit input terminal 14 of the control terminal block can be controlled e by
33. h soft start 277V Fast cycle 440 V with soft start and soft end 480 V and 500 V Slow cycle 8 s Slow cycle For other voltages contact your with soft start EUROTHERM Office slow eycik with soft start and soft end Electronics supply voltage Two voltage 100 V and 230 V 115 V and 230 V Options 200 V and 230 V 277 V and 230 V 380 V and 230 V 440 V and 230 V 480 V or 500 V and 230 V Frequency 60 Hz PLF alarm switch closed in alarm status Unit without baseplate 460 User Manual 19 Identification Baseplate Thyristor unit series Nominal current Baseplate code 00 For advance installation order the attachment baseplate without a unit Thyristor Nominal Baseplate unit series current code 15 Ato 55 A LA 017912 55 Ato 75A LA 017959 100A LA 171068 125 A to 150A LA 171128 For deferred orders of units for pre installed baseplates use the thyristor unit coding option Unit without baseplate code 76 Short or full code The full code for the 460 series thyristor units shown on page 1 9 in Coding specifies all the technical characteristics specified by the client To simplify the process for ordering thyristor units the short code can be used specifying the model the nominal current and the operating voltage The short code is presented as follows Series Nominal Nominal Electronics supply 00 current voltag
34. her otherwise the threshold current limit is at zero and the thyristor unit cannot operate 460 User Manual 317 Cabling Potentiometer adjustment For the threshold current limit it is possible to use an external potentiometer This 10 KO potentiometer should be connected between terminals 6 0 V and 12 10 V of the control terminal block The wiper should be connected to terminal 14 Current limit External signal Min Max current current 10 V 10k potentiometer Control terminal block Figure 3 12 External potentiometer configuration for the threshold current limit 3 18 460 User Manual Cabling Retransmission signal configuration The load current and voltage images are available on the control terminal block e The voltage image is available between terminals 15 Load voltage and 6 0 V The voltage image is retransmitted as a full wave rectified signal produced from the electronics power supply The value of this signal is 4 3 V mean for the nominal voltage The current image is retransmitted as a full wave rectified signal This signal is available between terminals 3 and 6 0V The current image retransmission signal is proportional to the load current The value of the retransmitted signal is 4 8 V mean approximately for the nominal current of the thyristor unit in full firing a
35. hree phase filtre PLF option fan cooled 380 V supply 3 26 460 User Manual Cabling Load in star with neutral Li Line protection and main circuit breaker user installation L2 L3 N 1A Fuse 2 aiais 51 5253 ER ESE ES RE 460 series 450 series 450 series thyristor solid state solid state ae unit contactor contactor o OMasterO OSlaveO OSlaveO OV common Three phase load in star with neutral configuration Figure 3 18 Configuration of a 460 thyristor unit Master and two 450 solid state contactors Slaves Without PLF option non fan cooled voltage 230 V 460 User Manual 327 Cabling Load in open delta For the open delta load configuration 6 wire configuration three 460 series power thyristor units can be used in all available firing modes The power configuration shown in the figure below must be observed Danger The thyristor units and the e
36. ion may have serious consequences for the installation ATTENTION result in the incorrect functioning of the power unit These marks must indicate specific points The entire manual remains applicable PERSONNEL The installation configuration commissioning and maintenance of the power unit must only be performed by a person qualified and authorised to perform work in an industrial low voltage electrical environment INDEPENDENT SAFETY It is the responsibility of the user and it is highly recommended given the value of the equipment controlled using 460 to install independent safety devices This alarm must be tested regularly Eurotherm can supply suitable equipment FURTHER INFORMATION For any further information and if in doubt please contact your EUROTHERM office where technicians are at your disposal should you require advice or assistance with the commissioning of your installation IV 460 User Manual Identification Chapter 1 IDENTIFYING THE THYRISTOR UNITS Contents page General introduction to the 460 series cccccc 1 2 Techinicaldata es Ee SEE Re EE Ee SG Ge NR se ds 1 6 do RE EE EE EE DO 1 6 Environment ees sesse ese ee ee ee ee RE Ee ee ee ee ee ee ER ee ee 1 6 oet EE ER EE E Oe 1 7 RettanstmissION ss EE SERE SE Ee Ek ENE DE ER Ee EE 1 8 C rent lM aa ececececeeeeeeeeeeseseeseesssessssnaaeees 1 8 Partial load failure detection eie 1 8 GOING arrana ER EE RE e e ad Bee tae at 1
37. l 14 and connect the power voltage The RMS voltage at the load terminals must be zero e Increase the current limit input signal to 100 The load voltage must represent approximately 0 of the supply voltage Turn the current limit potentiometer gradually clockwise and check that the current rises slowly Adjust the I limit Limit I potentiometer in order to obtain the maximum current permitted by the load Attention For the current limit adjustment only use an ammeter which gives the N True RMS value to measure the load current in order to prevent risks of errors which may reach 50 For a three phase installation using two or three 460 thyristor units take care to turn each of the current limit potentiometers gradually in succession in order to maintain the balance of the currents in each phase Attention In the case of Star with neutral configurations the neutral current for a load when starting cold can be 1 7 times greater than the phase currents N limited by the current limit if the operation of three units is synchronised Redesign the installation as a conseguence 460 User Manual 6 13 Commissioning Threshold limit The threshold current limit is independent of the control signal it is one of the following e110 of the thyristor unit nominal current terminal 14 of the control terminal block directly connected to terminal 12 and the I limit Limit I current limit potentiome
38. l configuration For normal operation of the 460 series thyristor unit disconnect the Inhibition input terminal 16 from the 10 V user voltage terminal 12 The Current limit input terminal 14 should be connected to the 10 V user voltage The Manual input terminal 4 should be connected to terminal 6 0 V 460 User Manual 313 Cabling Control of multiple thyristor units Multiple thyristor unit inputs can be configured in parallel or in series For these types of configuration all the thyristor units must have the same type of firing and the inputs must be configured for the same signal Input parallel configuration The inputs must be configured for voltage The input impedance for each thyristor unit is 100 kQ The current required for each thyristor unit is 0 2 mA at full scale e External control signal ov Figure 3 8 Parallel input configuration Input serial configuration The inputs must be configured for current The input impedance when configured for 0 10 mA is 1 KQ For 0 20 mA and 4 20 mA inputs the input impedance is 250 Q At full scale a voltage of 5 V is needed for each thyristor unit for the 0 20 mA and 4 20 mA inputs 10V for the 0 10 mA input o External control signal 0 5 mA 0 10 mA 0 20 mA 4 20 mA oV Figure 3 9 Serial input configuration 3 14 460 User Manual Cabling Manual control configuration The po
39. larm status and when the unit is switched off On standard models the relay switch available between terminals 41 and 42 is open in alarm status and in the event of a power failure Optionally code 83 the alarm relay switch is closed in alarm status The partial load failure detection relay switch is protected by asnubber circuit on the control board The alarm switch cutoff capacity is 0 25 A under 250 Vac or 30 Vdc The switch cutoff voltage must not exceed 250 Vac in any circumstances The PLF alarm relay switch output is suitable for driving an alarm unit The PLF alarm relay is reset either by switching off the thyristor unit or by a return to the nominal current 460 User Manual 37 Cabling CONTROL CABLES Attention The control connections must be made with shielded cables connected to earth at both N ends in order to ensure satisfactory immunity against interference Separate the control cables from the power cables in the cable routes Fixing The control wires must be grouped together in a shielded cable passing through the cable clamp under the unit to the left of the power terminal block Baseplate Tightening screw for shielded cable mn m Stirrup Soma Control cableclamp cable clamp seen from below Figure 3 3 Control cable clamp location Important To facilitate the earthing of the cable shield and to ensure maximum immunity to electromagnetic in
40. le For the 150 A nominal current 464 model the high speed fuse and its holder are external and ordered separately from the thyristor unit If the internal fuse blows a red indicator light on the front fascia of the unit lights up except for the 150 A nominal current unit To replace the internal fuse e unplug the module from its base e loosen the two fuse attachment screws e fit the appropriate fuse the references are given in table 7 1 Tightening torque 3 5 N m ELECTRONICS POWER SUPPLY PROTECTION FUSES These fuses should be installed in the cables which connect the electronics power supply voltage see Cabling chapter Electronics 1A Fuse Fuse holder Overall power supply 6 3 x 32 mm isolator Fuse isolator voltage dimensions max mm CS174289U1A0 CP174293 63 x 15 x 52 Table 7 2 Recommended fuse for protection of the electronics power supply connection 7 4 460 User Manual Maintenance MAINTENANCE The 460 thyristor units must be mounted with the heat sink vertical with no obstructions above or below which could reduce or hinder the air flow Attention the air expelled by one unit is not taken in by the unit placed If several units are fitted in the same cabinet arrange them so that above it For correct cooling of the unit it is recommended that the heatsink and the fan protection mesh be cleaned periodically depending on the degree of pollution of the environme
41. lectronics voltage circuits are at the line to line voltage Line protection and main circuit breaker user installation ri L2 L3 1A Fuses e Oo 2 E o SEE o RIBER o lg 51 52 53 51 52 53 51 52 53 ES EE Control 460 series 460 series 460 series signal thyristor thyristor thyristor 0 5 unit 5 unit 5 unit o OV common Three phase load Open delta 6 wire configuration Figure 3 19 Wiring diagram for three 460 thyristor units in Open delta 380 V supply 3 28 460 User Manual Configuration Chapter 4 CONFIGURATION Contents page Safety during configuration ese ee ee RR ke ee ee 4 2 Configuration of the driver board iese siese ee eee 4 3 Apt Iy PO EE NA AE ai ih at esi 4 5 Automatic
42. ll the references of the original fuses as fitted in the factory and the fuses which are authorised for replacement during maintenance The thyristor unit guarantee is subject to the use of high speed fuses specified in this table N Attention The use of other fuses invalidates the thyristor unit guarantee Nominal Max References current voltage Suppliers Eurotherm Ferraz LR 240 V CH 380 163 Q076650 500 V CH 110 153 X220958 E 1000 15 240 V CH 380 253 R076651 500 V CH 110 253 V082450 E 1000 25 25ET GSG 1000 25 40 A 500 V CH 110 044 C220963 JE 1000 40 40 ET GSG 1000 40 55A 500 V_ CH 110 753 S075893 E 1000 75 75 ET 55A 500 V CH 120 094 A099958 EE 1000 90 90 EET 75A 500 V CH 120 114 B099959 EE 1000 110 110 EET GSG1000 110 100A 500 V CH 120 154 C099960 EE 1000 150 150 EET GSG1000 150 125A 500 V CH 120 154 C099960 EE 1000 150 150 EET GSG1000 150 150A Overall dimensions of Fuse and External fuse CH 340 025 H300019 fuse holder assembly mm Fuse holder CP 171 482 V98711 220 x 50 x 110 Table 7 1 Recommended high speed fuses for thyristor protection 460 User Manual 3 Maintenance REPLACEMENT OF THE HIGH SPEED INTERNAL FUSE The 460 series power thyristor units nominal current from 15 to 125 A are fitted with high speed internal fuses These fuses are mounted at the rear of the pluggable modu
43. n lead to incorrect operation of the thyristor unit and can have serious consequences for the installation Nominal current ISAto55A Capacity of the power and earth terminals mm 2 5 to 16 M4 Tightening torque N m 75 A and 100 A 2 5 to 50 M6 125 A and 150 A Power 50 or 70 M8 Earth 2 5 to 50 M4 Table 3 1 Details of power cabling for 460 units 460 User Manual Cabling Without terminal covers 461 to 463 Models Baseplate 1 mm bare cable Terminal cover Terminal cover Figure 3 1 Power and safety earth cable fixing points The cross section of the connecting conductors used must comply with the IEC 943 standard Distance between terminals mm 16 mm tunnel terminal 35 mm tunnel terminal 35 mm tunnel terminal M10 Screw Table 3 2 Power cabling details for 460 units 3 4 460 User Manual Cabling USER TERMINAL BLOCKS The terminal blocks used to connect the electronics power supply and the PLF alarm relay contact are located at the top left of the baseplate The unit must be unplugged from the baseplate in order to access the user terminal blocks The connections are made using screw terminals The maximum wire cross section is 2 5 mm terminal tightening torque 0 7 N m Figure 3 2 User terminal blocks 460 User Manual 35 Cabling Electronics power supply The electronics pow
44. n saturable induc tive loads can be delayed with reference to the corresponding zero voltage figure 5 5 b The optimum delay angle must be adjusted with the potentiometer on the driver board see adjustment as a function of the load max delay 90 Au i Over current ot gt a ot 00 Delay angle Figure 5 5 Inductive load switching at zero voltage a and with delay angle b This firing mode is not suitable for saturable loads transformer primaries 5 6 460 User Manual Operation CONTROL Feedback function The 460 series power thyristor units contain an internal feedback loop The thyristor unit output power is linear between 0 and 100 of the maximum power as the input signal varies between 4 and 84 of the maximum scale y2 100 50 0 4 50 84 100 Setpoint Figure 5 6 Controlled parameter as a function of the setpoint The squared RMS load voltage represents the power dissipated in a purely resistive load the value of which is constant with the temperature variation The accuracy of the power feedback is guaranteed to be within 2 of the maximum power The feedback system automatically selects the higher value of two parameters V ou I For loads with low resistance variation as a function of temperature iron alloys nickel chromium aluminium Inconel etc the feedback in V is sufficient Feedback with automatic tran
45. nfiguration esseere 3 19 INNIDITION sesso ER OE EE rei 3 20 Slavefiring OUP Ui EE EER EERS EERDER Ede REG ee ee EER 3 20 Single phase load wiring diagram iese ee ke Re Re 3 21 Three phase load wiring diagrams iese see ee ee ee ee 3 22 Load in star without neutral or in closed delta 2 phase control ii EER EE EDS Eg DEER ES ee ER Se EE Ge ee 3 25 EMC filter connection 2 phase Control sesse see eke 3 26 Load in star with neutral sesse ee ee ee RR ee ee 3 27 Load in open delta eie ee ee in 3 28 460 User Manual 31 Cabling Chapter 3 CABLING SAFETY DURING CABLING AN Danger Cabling must be performed by personnel who are gualified to work with low voltage electrical eguipment It is the user s responsibility to cable and protect the installation in accordance with current professional standards A suitable device guaranteeing electrical separation of the equipment and the supply must be installed upstream from the unit in order to perform the operation in complete safety All power and control connections are made to the terminal blocks located on the attachment baseplate and must be made without a unit present AN Danger Before any connection or disconnection make sure that the power and control cables and wires are insulated from the voltage sources For safety reasons the safety earth cable must be connected before any other connection during cabling and must be
46. ng Non saturable inductive load When the load has an inductive component an inductor for example firing at zero voltage generates transient operation which produces an over current Operation chapter and in some cases can cause the thyristor protection fuse to blow To avoid these over currents at the start of each burst the first firing of the thyristors must be delayed in relation to the corresponding zero voltage Phase angle firing mode can also be used The optimum delay angle 90 max must be adjusted with potentiometer P4 depending on the load used The thyristor firing delay only affects the first firing in each burst When shipped from the factory potentiometer P4 is adjusted as shown below Thyristor firing mode Fast cycle Slow cycle Single cycle Position of potentiometer P4 Completely anti clockwise Minimum delay Soft start Soft start and end Completely clockwise Maximum ramp Phase angle No effect Position irrelevant Table 6 4 Factory potentiometer settings To adjust for a non saturable inductive load Turn potentiometer P4 completely clockwise maximum delay equal to 90 e Set a control signal corresponding to approximately 20 of the maximum setpoint e Slowly turn potentiometer P4 anticlockwise in order to reduce the over current visible on an oscilloscope at the beginning of each burst as much as possible For controlling a saturable inductive
47. nominal voltage On the front fascia are located e the partial load failure detection adjustment potentiometer e the Test push button for testing the adjustment of the PLF alarm e the indicator light to show partial load failure detection e the current limit adjustment potentiometer e the indicator light showing if the internal thyristor protection fuse has blown e the diagnostic connector 460 series thyristor units have permanent fan cooling above 100 A nominal 1 4 460 User Manual Identification The 460 thyristor units have the following thyristor firing modes e thyristor firing angle variation Phase angle e cyclic firing ratio modulation from 0 to 100 Burst mode Burst mode firing is characterised by different modes e a firing or non firing cycle Single cycle e slow cycle modulation time 8 s at 50 setpoint e fast cycle modulation time 0 8 s at 50 setpoint burst firing fast or slow with soft start in thyristor firing angle variation burst firing fast or slow with soft start and end in thyristor firing angle variation The soft start for high temperature coefficient resistive loads and the delayed firing angle at the first alternation in the case of the control of inductive loads which may cause fuse blow out or trigger the protective circuit breaker minimise transient over currents The soft start and end time can be adjusted between 0 and 0 25 s using the potentiometer on the
48. nt Danger AN Every six months check that the screws holding the power cables and the safety earth are correctly tightened see Cabling 460 User Manual B Maintenance TOOLS Operation Attachment of the baseplate Safety earth connection Power connection supply side and load connection Thyristor fuse replacement Cable clamp tightening Control and electronics power supply voltage connection Commissioning and adjustment Flat screwdriver mm Depending on M4 screw heads selected 1 x 6 461 1 x 8 462 to 464 1 x 8 461 to 463 2x15 0 5 x 3 5 Table 7 3 Tools Wrench HEX17 M10 464 Electrical equipment RMS ammeter or clip Eurotherm type 260 diagnostic unit recommended 7 6 460 User Manual
49. ockwise and check that the Fail D faut indicator light on the front fascia is off Turn the Adjust Seuil potentiometer slowly clockwise until the indicator light comes on Turn the potentiometer slowly anti clockwise until the Load Fail indicator light has just gone off The potentiometer adjusted in this way is used to obtain maximum sensitivity for the partial load failure detection really connected with the thyristor unit The push button on the front fascia labelled Test which simulates a current drop of 10 in the load is used to check the operation of the PLF circuit without having to disconnect the load This button must place the thyristor unit in alarm status if the adjustment has been performed correctly Reminder The PLF detection circuit does not use the load voltage directly but the electronics supply voltage 6 12 460 User Manual Commissioning CURRENT LIMIT ADJUSTMENT Linear limit The linear current limit can be adjusted using the I limit Limit I potentiometer on the front fascia e Make sure that the load is connected When used in conjunction with the threshold current limit potentiometer or external signal make sure first of all that the Threshold limit setpoint terminal 14 on the control terminal block is at the maximum value Turn the I limit Limit I linear current limit potentiometer completely anti clockwise minimum current e Apply a0 V signal to termina
50. on In the case of loads with high temperature coefficients connected in a star with neutral the current in the neutral can be up to 1 7 times higher than the current N in the phases as the current in the phases is limited by the current limit of each thyristor unit For correct operation of 460 series thyristor units it is important to comply with the power and electronics power supply connections shown on figures 3 16 to 3 19 3 24 460 User Manual Cabling Load in star without neutral or in closed delta 2 phase control For three phase loads connected in star with neutral or in closed delta 3 wire configura tion the use of 2 phase control is recommended One phase of the supply is direct not controlled In the 2 controlled phases a 460 thyristor unit operating as the Master the logic control output terminal 13 and a Slave 450 solid state contactor should be connected Line protection and main circuit breaker user installation L1 m T m 1A Fuses 1A Fuses oie O OLOLO OPOTo oroto 51 52 53 51 52 53 FOON ES ans es Control of 460 series 450 series the 460 thyristor solid state 8 T ount 5 contactor de OMasterO 6 OSlaveO common
51. on e the logic signal output to control a solid state contactor Slave firing output The terminal block is fixed on the baseplate and can be accessed after the 460 thyristor unit has been unplugged Danger Dangerous live parts may be accessible when the unit is unplugged OLOIJOLOLOI QO lo o Sie ee SS EE 1 2 3 4 5 8 6 a T 7 E 8 S 5 9 5 10 Oo 11 12 13 14 15 16 O I 4 1 2 Ie Control cable clamp C Figure 3 6 460 thyristor unit control terminal labelling Control terminal block capacity 0 5 mm to 2 5 mm Control terminal tightening torque 0 7 N m 3 10 460 User Manual Cabling Terminal number Description Not connected Load current image output Retransmission 0 5 V Full wave rectified signal Manual input External input Common 0 V Not connected 10 V user voltage Slave firing output 10 Vdc 10 mA max Current limit input Load voltage image output electronics power supply Retransmission 0 5 V Full wave rectified signal Thyristor unit operation inhibition input Table 3 3 Control terminal identification 460 User Manual 311 Cabling INPUT SIGNALS The control wires are connected to
52. per attachment by a quarter of a turn e tilt the unit forwards to approximately 20 degrees from the horizontal e free the unit from its baseplate Danger AN Before dismounting the unit ensure that it is switched off and that the heatsink is not hot 2 4 460 User Manual Cabling Chapter 3 CABLING Contents page Safety during cabling sisne ee ee ee ee ee Re ee Re ee ge ke 3 2 Fixing the power cables 0 0 0 ee ee ee Re ee Re ee 3 3 User terminal DIOCKS 2 0 0 eecceeesceeeeseeeeeneeeeeeneeeesnneeeenaeeeeeeeeesaaes 3 5 Electronics power SUPPLY iese ee ee Re ee ee ee 3 6 Alarm relay SWitCh ees ees see ee se ee ee ee ee ee Ge ee 3 7 Control cables st ST ER GEN BERE ee tected ag Poe ee 3 8 BE EE Oe 3 8 Connecting the shield to the ground iese ee ee ee 3 9 Control terminal DIOCK ee ee ee ee ee Re ee oea aeiia 3 10 ooie del SR EO EE el ies Ee 3 12 External control iis ESE SEER ESE EDE kate GEE El GED ea 3 13 Control of multiple thyristor units esse ee ee ee Re ee 3 14 Input parallel configuration sses 3 14 Input serial configuration eerren 3 14 Manual control configuration ee ee Re ee 3 15 Current limit configuration e ees ee RA Re ee ee 3 16 Linear current limit esse ee ee Re ee ee ee 3 16 Threshold current limit ee ee Re RR Re 3 17 External voltage adjustment sesse esse ee ee ee ee 3 17 Potentiometer adjustment ee ee RA Ee 3 18 Retransmission signal co
53. perating temperature Altitude Storage temperature Protection Thyristor protection External cabling Atmosphere Humidity Pollution 15 A to 150A 120 Vac to 500 Vac 10 15 Inhibition below 70 of the nominal voltage response time lt 10 ms automatic reset 2 s after return to 85 of the value 50 or 60 Hz 42 Hz 1 3 W approximately per ampere Permanent fan cooling above 100 A nominal Consumption 23 VA Powered by the electronics supply voltage Resistive with high temperature coefficient or inductive transformer primary circuit or inductor In the OFF state typically below 30 mA 0 C to 50 C in vertical position 2000 m maximum 10 C to 70 C IP00 can be opened without tools according to TEC 592 Internal high speed fuse fuse blown indicator light external fuse for 150 A model 464 Varistor and RC snubber To be performed according to the standards IEC 364 Non explosive non corrosive and non conducting RH of 5 to 95 without condensation Degree 2 admissible defined by IEC 664 1 6 460 User Manual Identification Control Power supply Signal type Setpoint Input impedance Manual control Thyristor firing modes Delayed thyristor firing Enable Inhibition Diagnostics Feedback type Configuration Connection Connection of the electronics power supply to the user terminal block Consumption 7 VA non fan cooled unit 30 VA fan cooled unit Analogue Voltage 0 5
54. pply voltage The nominal value of the thyristor unit voltage must be greater than or equal to the voltage of the supply used In three phase operation the nominal voltage of the thyristor unit must be greater than or equal to the line to line voltage Attention Given the inhibition at 70 of the nominal voltage it is essential that the nominal voltage of the thyristor unit is as close as possible to the nominal supply voltage Electronics supply voltage The electronics supply voltage must be in phase with the power voltage It is selected by the position of the soldered links and the choice of the transformers This selection is made in the factory depending on the electronics supply voltage code Input signals The configuration of the miniature switches on the driver board must be compatible with the selected control signal level see Configuration chapter page 4 6 Partial load failure detection The voltage used for the PLF detection circuit is that used for the electronics power supply This voltage must thus correspond to the power voltage Attention N The PLF alarm switch must be connected in the circuit with a voltage which never exceed 250 V single phase or three phase 230 V supply 460 User Manual 63 Commissioning DIAGNOSTIC UNIT For easier commissioning and adjustment operations and for the thyristor unit state diagnos tics it is advisable to use the EUROTHERM type 260 diagnostic unit
55. put power to change from 100 to 0 by varying the thyristor firing angle from full firing to 0 Soft start with Soft end with increase in the decrease in the firing angle firing angle d 1 Full firing yj Figure 5 4 Soft start and end in burst firing mode The duration of the soft start and end can be adjusted from 0 to 250 ms by the potentiometer on the driver board See Commissioning chapter The soft end time Te is not included in the firing period Tp but all the power sent to the load is taken into account in the feedback After the soft start by thyristor firing angle variation the thyristor unit remains in full firing during the firing time Note For soft starts of loads with very high resistance variations as a function of temperature e g Kanthal Super use the Special 677 which has an increased start time 460 User Manual 55 Operation Over current elimination for the inductive load The Fast cycle and Slow cycle Burst firing modes composed of whole periods start at zero voltage for purely resistive loads For inductive non saturable loads in Single cycle and Burst mode without soft start firing at zero voltage generates transient operation which could in certain cases induce the appearance of over currents figure 5 5 a and a blow out of the high speed fuse thyristor protection To prevent this over current the first firing of the thyristors for no
56. rrent limit The current limit regulates the square of the RMS load current I The current limit can be used with an external or manual control Linear current limit The linear current limit can be set by the internal voltage available on the control terminal block The linear current limit is maintained by connecting terminal 14 of the control terminal block to 10 V terminal 12 A Attention The terminals 14 and 12 must be connected together otherwise the threshold current limit is at zero and the thyristor unit cannot operate For linear current limit the ratio Load current Input signal can be adjusted by the potentiometer marked I limit Limit I on the front fascia 3 16 460 User Manual Cabling Threshold current limit The threshold current limit can be adjusted in 2 different ways e by an external voltage e by an external potentiometer External voltage adjustment For the threshold limit an external 0 10 V voltage should be connected between terminals 14 Current limit and 6 0 V terminal 14 is positive External control signal A OV External current limit voltage 10 V Inhibition A Enable Control terminal block Figure 3 11 External voltage configuration for the threshold current limit If the external current limit is not used terminals 14 and 12 must be connected toget
57. ser Manual 2 1 Installation Chapter 2 INSTALLATION SAFETY DURING INSTALLATION AN Danger 460 units must be installed by a person authorised to work in an industrial low voltage electrical environment Units must be installed in fan cooled electric cabinets guaranteeing the absence of condensation and pollution The cabinet must be closed and connected to the safety ground in accordance with the standards NFC 15 100 IEC 364 or the current national standards For installations in fan cooled cabinets it is recommended to place a fan failure detection device or a thermal safety control in the cabinet Bulkhead mountings are possible with 460 series units The units must be mounted with the heatsink positioned vertically and with no obstructions either above or below which could block the passage of the ventilation air If multiple units are installed in the same cabinet they should be arranged in such a way that the air expelled by one unit cannot be admitted into the unit located above it Leave a vertical gap of at least 80 mm between two units Leave a gap of at least 20 mm between two units installed side by side AN Attention The units are designed to be used at an ambient temperature less than or equal to 50 C Excessive overheating may cause incorrect operation of the unit which in turn may cause damage in the components 460 series power units have permanent fan cooling for nominal
58. ses sesse ee ee ee 7 4 Maintend ae AE eenn N OR EE N ENE 7 5 460 User Manual 7 Maintenance Chapter 7 MAINTENANCE Danger The thyristor unit must be maintained by qualified personnel authorised to perform work in a low voltage industrial electrical environment THYRISTOR PROTECTION The thyristors of the 460 series power units are protected as follows e the internal high speed fuse against over currents e the RC snubber and the varistor against too fast voltage variations and transient over voltages when the thyristors are not firing e the thermal switch for models 463 and 464 In the event of accidental overheating of the cooler or if the fan stops the thermal switch opens which causes the thyristor firing to be stopped Danger The internal thyristor protection fuse does not protect the installation in any circumstances The user s installation must be protected upstream non high speed fuse thermal or electromagnetic circuit breaker appropriate fuse isolator and must comply with current standards 7 2 460 User Manual Maintenance THYRISTOR PROTECTION FUSE The 460 series power thyristor unit is supplied with the internal fuse fitted up to 125 A For the 150 A nominal current the external fuse must be ordered separately Attention N The high speed fuse is only used for the protection of the thyristors against wide amplitude over loads Table 7 1 contains a
59. sfer between the two controlled values is very important for loads with high resistance variation as a function of temperature molybdenum molybdenum bisilicide tungsten platinum etc For this type of load the operation is as follows P feedback at start when cold automatic feedback type change to V2 when hot which allows optimum control and feedback at all temperatures 460 User Manual 57 Operation Supply voltage variation compensation The supply variation compensation acts in the range 10 to 15 of the thyristor unit nominal voltage This voltage is self supplied on the power and reference phases Without a supply voltage variation compensation a 10 decrease or increase in the supply voltage would induce a 20 decrease or increase in the power supplied to the thyristor unit load For a constant resistive load the feedback with supply variation compensation is used to maintain the output power constant in spite of the supply voltage variations Supply voltage Setpoint Power supplied variation range With compensation Without compensation 0 to 10 100 to 121 5 to 10 81 to 109 10 to 10 65 to 97 15 to 10 50to 85 Table 5 1 Feedback with supply variation compensation Table 5 1 shows the stabilisation of the output power on a constant resistance as a function of the supply variations It the voltage falls below 70 of its nominal value the thyristor unit is inhibite
60. st firing with a delay eliminates the transient over current see Operation chapter This delay can be adjusted between 0 and 90 and only acts on the first alternation The preliminary adjustment is carried out using potentiometer P4 located on the driverboard see figures 4 1 and 4 2 To access the adjustment potentiometer the unit must be unplugged from its baseplate Danger AN Dangerous live parts are accessible when the unit is unplugged Only a qualified person authorised to work in a low voltage industrial electrical environment should access the inside of the unit The effect of the adjustment potentiometer depends on the thyristor firing mode Thyristor Action of potentiometer firing mode P4 Phase angle No action Single cycle Delay of the first firing of the Slow cycle thyristors at the start of each Fast cycle firing cycle Burst firing Soft start duration with soft start in thyristor firing angle variation Burst firing Wit Soft start and duration soft start and end in thyristor firing angle variation Table 6 3 Effect of the preliminary adjustment potentiometer 6 8 460 User Manual Commissioning Resistive load with low resistance variations For loads with low resistance variations as a function of temperature the adjustment must guarantee thyristor firing at zero voltage Ensure that potentiometer P4 on the driverboard is turned completely anticlockwise delay angle 0 an
61. ter on the front fascia is clockwise e controlled by an external potentiometer connected between terminal 12 10 V and terminal 6 0 V the wiper is connected to terminal 14 e controlled by an external dc voltage 0 10 V The Current limit input impedance terminal 14 is greater than or equal to 150k Q For the threshold current limit adjustment e After adjusting the linear limit using the potentiometer on the front fascia switch on the thyristor unit set the control to maximum Reduce the Threshold current limit setpoint gradually until the current starts to decrease e Mark the current limit setpoint corresponding to position 5 of the diagnostic unit and increase it by approximately 10 so that it is only activated as a back up for the linear current limit Attention A The threshold current limit can be pre adjusted when a thyristor unit is switched on but not firing The max value of the squared RMS load current is proportional to the Threshold current limit setpoint observed at position 5 of the diagnostic unit Current limit signal position 5 of the diagnostic unit Table 6 5 Example of the threshold current limit diagnostic for 100 setpoint 6 14 460 User Manual Commissioning CHECKS IN THE EVENT OF ABNORMAL OPERATION Symptom 1 The thyristor unit is not fired after a firing request Action 1 1 Check that the power is present if the power is absent but the elec
62. terference the metal cable clamp is fixed directly to the ground of the unit 460 User Manual Cabling Connecting the shield to the ground To insert the control cable and earth its shield Y Stripthe shielded cable as shown in figure 3 4 a The control wires must be long enough for the connection between the metal cable clamp and the control terminal block The cabling inside the unit must be as short as possible Control wires Shield Insulating sheath 20 to 40 cm Control wires Shield folded back b Figure 3 4 Control cable stripping Fold backthe shield on the insulating sheath figure 3 4 b Insert the cable in the metal cable clamp so that the shield is located in the stirrup and does not pass the cable clamp Tighten the stirrup 4 x 1 flat screwdriver tightening 0 7 N m Cable clamp gt Backeplate a Tightening screw eee Shield folded back Cable Left hand side view Figure 3 5 Cable tightening and shield grounding The possible diameters of the cables with the shield folded back are 5 to 10 mm per cable clamp 460 User Manual 39 Cabling CONTROL TERMINAL BLOCK The following connections are made on the driver board user terminal block e the external or manual input signal e the inhibition of the thyristor unit operation e the threshold current limit e the load current and voltage retransmissi
63. the driver board Configuration jumpers PLF detection Light indicator Setting Test button Current limi adjustment Front fascia socked Miniature configuration switches 1 fees Diagnostic Potentiometer Figure 4 1 Location of the configuration elements on the driver board of the 460 thyristor unit 460 User Manual 4 3 Configuration Driver board Potentiometer P4 SW1 Adjustment of the firing delay 4 or the soft start ramp a 4 7 Aa NDUOPOO NO Miniature configuration switches Figure 4 2 Location of the miniature switches rear view The positions of the miniature switches correspond to 1 switch lowered ON position 0 switch raised Unless otherwise specified in the order the thyristor units are delivered with the following configuration e the input configured for 4 20 mA e the thyristor firing mode set to firing angle variation Phase angle e frequency 50 Hz e the thyristor firing delay potentiometer set to the maximum maximum start ramp resistive load and 90 firing delay inductive load 4 4 460 User Manual Configuration Input type The input signal type is configured by miniature switches 1 to 4 In tables 4 1 to 4 4 the 1 indicates the lowered position of the switch ON position Automatic input external signal Automatic Position of the miniat
64. the screw terminal block control terminal block attached to the baseplate The terminal block is accessible with the 460 thyristor unit dismounted from the baseplate To dismount the thyristor unit from its baseplate e unlock the upper attachment by a quarter of a turn e tilt the unit forwards to approximately 20 degrees from the horizontal e free the unit from its baseplate Danger e Before dismounting the unit ensure that the heatsink is not hot e Dangerous live parts may be accessible if the unit is dismounted when the thyristor unit is switched on The thyristor units can be controlled by an external analogue signal from a controller or another signal source or manually by an external potentiometer connected to the control terminal block Note The following low level inputs outputs control signal load current image output load voltage image output Slave firing command output inhibition are isolated by transformers from the electronics supply voltage and from the power section 3 12 460 User Manual Cabling External control The 460 thyristor unit can be configured with the choice of 3 input signal voltage levels and 4 input signal current levels see technical data The external signal is applied to terminals 5 and 6 of the control terminal block on terminal 5 External control signal Enable Control terminal block Figure 3 7 External control signa
65. ther information on CE Mark please contact your nearest Eurotherm office ELECTROMAGNETIC COMPATIBILITY EMC For industrial environments excluding residential environments The 460 products are considered as components without any direct function as defined in the EMC Directive The system or installation in which these products are incorporated must complies with the essential protection requirements of the EMC Directive However Eurotherm certifies that the 460 products when installed and used in accordance with their User Manual meets the following EMC test standards and enables the system or installation in which there are installed to comply with the EMC Directive in regards to the 460 products ll 460 User Manual EMC STANDARDS Immunity Generic Standard EN 50082 2 Test Standards EN 61000 4 2 EN 61000 4 4 ENV 50140 ENV 50141 Emissions Generic Standard EN 50081 2 Test Standard EN 55011 Product Standard IEC1800 3 The choice of the Conducted Emission applicable standard depends on the application EN 50081 2 With a external filter IEC 1800 3 Without external filter Applies for the second environment EMC EXTERNAL SERIES FILTERS To reduce the conducted emissions that occur when using thyristor units Eurotherm can supply external filters Nominal current ENC filter ordering code of thyristor unit Single phase wiring Three phase application 15Aand25A FILTER MON 25A 00 FILTER TRI 63A
66. transient over current when starting up an inductive load is too high Burst mode or Single cycle firing 3 The thyristor is in full firing with an input signal at zero Action 2 1 Check that the load cabling is correct 2 2 Check the level of the oscillator input signal signal in position 15 of the diagnostic unit is 6 4V peak for measurement use an oscilloscope 2 3 The factory pre adjustment of potentiometer P4 of the firing delay angle to 0 has not been readjusted Increase this angle by turning potentiometer P4 on the driver board clockwise See Preliminary adjustment of the inductive load page 6 10 3 1 Check the configuration of the input signal and that the signal is really absent from terminals 4 and 5 of the control terminal block 3 2 By disconnecting the 4 gate cathode wires from the control circuit and insulating the connection lugs check that the thyristors are not short circuited 3 3 Check that the electronics supply voltage is correct and is in phase with the power If the fault persists after all these checks contact your nearest EUROTHERM office where technicians will be able to advise you and assist you during commissioning 6 16 460 User Manual Maintenance Chapter 7 MAINTENANCE Contents Thyristor Protection sastite ee Re Re ee Re ee ee Thyristor protection fuse Replacement of the high speed internal speed esse 7 4 Electronics power supply protection fu
67. tronics supply voltage is present the thyristor unit indicates a PLF alarm and the indicator light on the front fascia is lit 1 2 Check that the thyristor protection fuse has not blown 1 3 Check the connection of the electronics supply voltage on the user terminal block terminals 51 and 52 or 53 1 4 Check that the Inhibition input terminal 16 on the driver board is not connected to 10 V terminal 12 1 5 Check that the control signal arrives correctly on the driver board terminal block e on terminal 4 with the external control e on terminal 5 with manual control and that the control wires are correctly inserted in the screw connection system 1 6 Check that the polarity is correct 1 7 Check that the input signal type and level are compatible with the type and level of the configured signal 1 8 Check the cabling of the thermal switches on the power board 1 9 Check the presence of the thyristor firing pulses 20 V pulses for Phase angle firing e 26 V pulses for Burst firing mode in position 13 of the diagnostic unit 1 10 Check that the current limit is not at zero position 5 of the diagnostic unit 1 11 Check that the supply voltage is greater than or equal to 70 of the thyristor unit nominal voltage 1 12 Check that the electronics supply voltages are present 15V 15V 10V voltages present see tables 6 1 and 6 2 460 User Manual 615 Commissioning Symptom 2 The
68. ture coefficient loads using soft starts e elimination of over currents when starting inductive loads e current limit e partial load failure detection e logic output to control other power units Slave firing output e selective pulse locking circuit e inhibition available on the user terminal block e load current and voltage level image retransmission 1 2 460 User Manual Identification User terminal blocks Heat sink OIE 7 e amp gt EUROTHERM Fail O D faut O Adjust Seuil Test limit a Limit vi Fuse fail Cl D f fusible 240V 75A Diagnostic socked Control cable clamp Power terminals Figure 1 1 Overall view of the 460 series thyristor unit 460 User Manual Identification The 460 series thyristor units are fitted with e a driver board which generates the thyristor firing start signals and regulates the current and voltage measurements e a snubber board which protects the thyristors from fast voltage variations and generates the thyristor firing pulses Models 462 to 464 have a selective thyristor gate pulse locking board to avoid unstable firing in certain applications The control system regulates the square of the voltage or the square of the load current as a function of an analogue input signal automatic selection of the larger value 460 thyristor units compensate for supply variations in a range from 10 to 15 of the
69. ure switches external input signal 2 3 0 5 V 0 10 V 1 5 V 0 5 mA 0 10 mA 1 5 mA 0 20 mA 4 20 mA D QO H OTT m ma O a MAA RO OO AOOOSSOO Table 4 1 Configuration of the automatic input Manual input The manual input range controlled by the external potentiometer the wiper is connected to terminal 4 depends on the configuration of the automatic input Position of the miniature switches Manual input range 0 5 V 0 10 V 1 25 V 6 25 V Table 4 2 Configuration of the manual input 460 User Manual 4 5 Configuration Thyristor firing mode The thyristor firing modes available for the 460 series power thyristor units can be configured by miniature switches 5 to 7 and by two jumpers J1 and J2 located on the driver board Thyristor firing mode Firing angle variation Position Miniature switches Jumpers Ji Single cycle Fast cycle Slow cycle Fast cycle with soft start Slow cycle with soft start Fast cycle with soft start and end Slow cycle with soft start and end Table 4 3 Configuration of the firing mode n Frequency in table 4 3 indicates that the jumper position is irrelevant The frequency used is determined by miniature switch 8 Frequency Position of miniature switch 8 50 Hz 1 60 Hz Table 4 4 Configuration of the supply frequency used 0 4 6 460 User Manual
70. wer thyristor unit can be controlled by an external potentiometer manual control For manual control the external potentiometer should be connected between terminals 6 0 V and 12 10 V The wiper is connected to terminal 4 Manual input The potentiometers used are from 4 7 kQ to 10 kQ 100 0 OV Potentiometer 4 7k to10K HT Inhibition Enable Control terminal block Figure 3 10 460 thyristor unit manual input If manual control is used terminal 5 of the external input must be connected to 0 V Attention N If the input signal is not disconnected from terminal 5 the two signals external and manual are added together The inhibition circuit should be open terminal 16 is not connected to terminal 12 If the current limit is not used terminals 14 and 12 should be connected together 460 User Manual 315 Cabling Current limit configuration The 460 series power thyristor units have 2 types of current limit see Operation chapter e linear limit internal limit and threshold limit external limit For linear current limit the ratio Load current Input signal can be adjusted by the potentiometer marked I limit Limit I on the front fascia The threshold current limit is a function which is used to limit the load current to a specified value independently from the input signal and the linear cu

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