Siemens RGZESDI User's Manual
Contents
1. approved method of mea suring insulation resistance may be used provided the voltage across the insulation is at a safe value for the type and condition of the insula tion A hand cranked megger of not over 500 volts is the most conve nient and safest method Standards of the Institute of Electrical and Electronics Engineers Inc IEEE recommend that the insulation resistance of stator windings at 75 C measure at 500 volts DC after one Minute should not be less than Rated Voltage of Insulation Machine 1000 resistance in 1000 Megohms This formula is satisfactory for most checks For more information see IEEE Standard No 43 Recommended Practice for Insulation Resistance Testing of AC Rotating Machinery AAN WARNING Entanglement Can cause death serious injury or property damage To avoid the danger do not attempt to clean motor while it is operating Contact with rotating parts can cause severe personal injury or property damage Stop the motor and lock out switch before cleaning Siemens Energy amp Automation Inc Industrial Products Division 14000 Dineen Drive Little Rock Arkansas 72206 1999 Siemens Energy amp Automation Inc Bulletin NMIM L1006 15M1199Tl Printed in U S A2. grease that is satisfactory Re lubricate bearings every six months more often if conditions require as follows 1 Stop the motor Lock out the switch 2 Thoroughly clean off pipe plugs and remove from housings CLEANING The motor exterior must be keep free of oil dust dirt water and chemicals For fan cooled motors it is particularly important to keep the air intake openings free of foreign material Do not block air outlet or inlet On non explosion proof TEFC motors a removable plug in the bottom of the motor bearing hous ing permits removal of accumulated moisture Drain regularly SERVICE For immediate action on your motor problems call your certified service center or contact your nearest Siemens District Office JAN CAUTION Entanglement May cause injury or property damage To avoid the danger do not lubricate motor while in operation since excess grease will be forced through the bearings and into the motor before it will force its way out of the drain plug Excess grease accumulation on windings reduces the insulation life 3 Remove hardened grease from drains with stiff wire or rod 4 Add grease to inlet until small amount of new grease is forced out of the drain 5 Remove excess grease from ports replace inlet plugs and run motor 1 2 hour before replacing drain plugs 6 Put motor back in operation INSULATION RESISTANCE Check insulation resistance periodi cally Any
3. in rendering first aid S E M E N S November 1999 TABLE OF CONTENTS INTRODUCTION asssssnssnnssnnnnsnnnnsnnussnnnsnnnnunnnsusnsssnnussnuununsnnunnnnnnnnn 4 INSPECTION ca ii iaaa a Wa a aaa ee ee ne ewe eee ee 4 STORAGE ii aaaea i aiaa a AA AE aaa a E Ia 5 INSTALLATION iii pinnu a oora aE aa eee eee eee ee A 5 OPERATION iii AA eieaa TE ea AA e ae Ra s dois Ba ee a ia aa 5 VED OPERATION ii iii iwa n a EA eee eee ee o Ya 6 ACCESSORIES THERMOSTATS pai a aa A woe ae a ee a aa ee a a eer ee a 6 BLOWERS viii osetia aie anune E cn ee a Sa UA Bee A a ERA 6 7 ENCODERS v ino aaa a nea WA aa ees Ia meee aa 7 MAINTENANCE e BEARING LUBRICATION 0c ccc eee eee 7 e INSULATION RESISTANCE ccc cence eee eee eee 8 CLEANING iia wa ai ee in eee ce se fe ee wn paa ween ee cee ee ee ee 8 IMPORTANT These instructions do not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation operation or maintenance Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser s purposes the matter should be referred to the local Siemens sales office The contents of this instruction manual shall not become part of or modify any prior or existing agreement commitment or relationship The sales contract con tains the entire obligation of Siemens The warranty contained in
4. S i E M E N S November 1999 RGZESDI Inverter Duty AC Induction M otors Installation Operation Maintenance Instructions Frames 143T through S449SS LS ee o iE ma Gi ii EEr JE zi CE KA Sa Jr Ia SS H Zi Na Via Siiip pO EEF eua es ________L_ adq JI Ponvartar pe pii inyartar SIGNAL WORDS The signal words Danger Warning and Caution used in this manual indicate the degrees of hazard that may be encountered by the user These words are defined as Danger Indicates death or serious injury will result if proper precautions are not taken Waming Indicates death or serious injury or property damage can result if proper precautions are not taken Caution Indicates some injury or property damage may result if proper precautions are not taken QUALIFIED PERSON For the purposes of this manual and product labels a qualified person is one who is familiar with the installation construction operation or maintenance of the equipment and the hazards involved In addition this person has the following qualifications a Is trained and authorized to energize de energize clear ground and tag circuits and equipment in accor dance with established safety practices b Is trained in the proper care and use of protective equipment such as rubber gloves hard hat safety glasses or face shields flash clothing etc in accordance with established safety practices c is trained
5. closed blower cooled TEBC motors Blower should be checked for correct rotation Air movement should be from non drive end toward drive end of the motor The nameplate voltage and fre AM WARNING Hazardous Voltages and Entanglement Can cause death serious injury or property damage To avoid the danger the control circuit should be designed to prevent the automatic starting of the motor when the thermostat resets Always de energize all power sources and ground the equipment before maintenance Only qualified personnel should perform maintenance quency should agree with the power supply Motors will operate successfully on line voltage within 10 of the nameplate value or frequency within 5 The com bined variation shall not exceed 10 Wiring of Blower motor should meet the National Electric Code and local building codes Encoders if Equipped Follow encoder instructions sup plied with the RGZESDI motor for encoder operation and wiring MAINTENANCE MAINTENANCE Failure to properly maintain the equipment can result in severe per sonal injury and product failure The instructions contained herein should be carefully reviewed understood and followed The fol lowing maintenance procedures should be performed regularly 1 Bearing Lubrication 2 Insulation resistance check 3 Cleaning This checklist does not represent an exhaustive survey of mainte nance steps necessary to ensu
6. lerated to a slow speed Carefully observe for unusual conditions as motor coasts to a stop 4 When checks are satisfactory operate at minimum load and look for unusual conditions Increase load slowly to a maxi mum Check unit for satisfactory operation Electric motors operating under nor mal conditions become quite warm Although some places may feel too hot to touch the unit may be within operational limits Use a thermo couple to measure winding temper ature when there is any concem The total temperature not the tem perature rise is the measure of safe operation Investigate the operating conditions if the total temperature measured by a ther mocouple placed on the winding exceeds e 275 F 135 C for class F insula tion e 302 F 150 C for class H insula tion life A motor subjected to a 10 C temperature rise above the maximum limit for the insulation may cause the insulation life to be reduced by 50 To avoid overloading be sure motor cur rent does not exceed nameplate current when nameplate voltage is applied Electrical Overload May cause property damage To avoid the danger guard against overloading Overloading causes overheating and overheating means shortened insulation g Electrical Overload May cause property damage To avoid damage to the motor caution must be observed when applying standard motors for continuous low speed constant torque operation A standa
7. ling or damage in shipping file a claim at once with the carrier and notify your Siemens Sales Office Examine the outside of the motor carefully for damage with particular attention to conduit box fans and covers Inspect and tighten all hard ware and accessories which may have become loosened during ship ping and handling Turn the shaft by hand to be sure that it rotates freely If the motor has been mis handled sufficiently to break exter nal parts the end shield should also be removed to check for internal damage unless the motor is explo sion proof See waming below on explosion proof motors Ay WARNING Explosion Can cause death serious injury or property damage When repairing and reassembling a motor that has an under writer s label it is imperative that the unit be re inspected and 1 All original fits and tolerances are maintained 2 All plugs and hardware be securely fastened 3 Any parts replacements including hardware be accurate duplicates of the Originals Repair work on explosion proof motors can only be performed by the original manufacturer or U L certified shops Violations of any of the above items will invalidate the significance of the U L Label ture Drain regularly if storage atmosphere results in formation of condensation INSTALLATION Qualified service or maintenance personnel must handle installation The motor foundation must rigidly support all four feet in the sa
8. lower is supplied check to see that it is wired and operating properly The blower should be wired to a separate 60 hz power source 3 If possible remove extemal load and turn shaft by hand to ensure free rotation This may have been done during installation pro cedure if so and conditions have not changed since this check may not be necessary VFD OPERATION Special consideration must be paid to ensure that the motor is operat ed within recommended guidelines for torque and speed for the type and size of RGZESDI motors select ed Under no circumstances should the motor be operated at frequen cies beyond the safe mechanical limits shown below in this docu ment RGZESDI Constant Torque motors provide full rated torque within their listed speed range without exceed ing their Class F temperature rating Maximum Safe Mechanical Speed Limits Direct Connected Loads does not imply constant horsepower capability Motor 3600 1800 1200 rpm rpm 324 326 4500 3600 2700 364 365 4500 2700 2700 404 445 3600 2700 1800 447 449 3600 2250 1800 Frame pm a If load is disconnected run motor at no load long enough to be certain that no unusual conditions develop Listen and feel for excessive noise vibra tion clicking or pounding If present stop motor immedi ately Investigate the cause and correct before putting motor in service b If load is not disconnected interrupt the starting cycle after motor has dece
9. me plane Place shims under the motor feet as required so they will not be pulled out of plane when mount ing bolts are tightened All wiring to the motor and control must be in accordance with the National Electrical Code and all local regula tions Before load is connected momentarily energize motor to check that the direction of rotation is proper For direct connected loads accurate alignment is 0 004 inch ft Radius to dial Indicator one foot Any change in shims requires re checking alignment When align ment is within limits dowel two feet of each unit When installing V belt sheave spur or helical pinion or chain drives be certain that they are within NEMA limitations Refer to NEMA motor and general stan dards MG1 14 07 and 14 41 OPERATION Repeated trial starts can over heat the motor and result in motor bumout particularly for across the line starting If repeated trial starts are made allow sufficient time between trials to permit heat to dis sipate from windings and rotor to prevent overheating Starting cur rents are several times running cur rents and heating varies as the square of the current After installation is completed but before motor is put into regular ser vice make an initial start as fol lows 1 Check motor connections and VFD connections against wiring diagrams 2 Check voltage phase and all loaded drive parameters against motor nameplate If an auxiliary b
10. rd motor s self cooling capacity depends upon self ventilation schemes that are greatly reduced at decreased operating speeds Electrical Overload May cause property damage To avoid damage to the motor it is the responsibility of the startup personnel during commissioning of the VFD motor combination to properly tune the drive to the motor for the specific application Application of motors which are not per the guidelines of this document may void the warranty if they are not specifically approved by Siemens on PWM pulse width modulated inverter power Speed ranges are based on use with vector type IGBT inverters set at a minimum 3 kHz switching frequency and are designed for operation at 150 of rated torque for one minute up to the base speed of the motor over load capacity declines as the motor reaches maximum speed 5 ACCESSORIES Thermostats All RGZESDI motors are equipped with Class F normally closed ther mostats for detection of overload conditions The thermostat is a device that is intended to be used in the alarm or protective circuit of an RGZESDI motor It is in direct contact with the stator coil and is useful in guarding against loss of normal ventilation air high ambient temperature and prolonged opere tion of self ventilated motors at very low speeds Blowers if Equipped Blower motors where supplied must be in operation to supply cool ing air before loading totally en
11. re safe operations of the equipment AR DANGER Hazardous Voltages Will cause death or serious injury To avoid the danger always de energize all power sources and ground the eguipment before maintenance Only gualified personnel should perform maintenance Particular applications may reguire further procedures Should further information be desired or should particular problems arise which are not covered sufficiently for the pur chaser s purposes the matter should be referred to the local Siemens Sales Offices The use of unauthorized parts in the repair of the equipment tam pering by unqualified personnel or removal or alterations of guards or conduit covers will result in danger ous conditions which can cause severe personal injury or equipment damage Follow all safety instruc tions contained herein BEARING LUBRICATION Bearing life is assured by maintain ing proper alignment proper belt or chain tension and good lubrication at all times Prior to shipment motor bearings are lubricated with the proper amount and grade to provide six months of satisfactory service under normal operating conditions For best results grease should be compounded from a polyurea base and a good grade of petroleum oil It should be of No 2 consistency and stabilized against oxidation Operating temperature range should be from 15 F to 300 F for class F and H Most leading oil companies have special bearing
12. the contract between the parties is the sole warranty of Siemens Any statements contained herein do not create new warranties or modify the existing warranty SIEMENS November 1999 INSTALLATION amp OPERATION INTRODUCTION THIS EQUIPMENT CONTAINS HAZARDOUS VOLTAGES ROTATING PARTS AND HOT SURFACES SEVERE PERSONAL INJ URY OR PROPERTY DAM AGE CAN RESULT IF SAFETY INSTRUCTIONS ARE NOT FOL LOWED ONLY QUALIFIED PER SONNEL SHOULD WORK ON OR AROUND THIS EQUIPMENT AFTER BECOMING THOR OUGHLY FAMILIAR WITH ALL WARNINGS SAFETY NOTICES AND MAINTENANCE PROCE DURES CONTAINED HEREIN THE SUCCESSFUL AND SAFE OPERATION OF THIS EQUIP MENT IS DEPENDENT UPON PROPER HANDLING INSTALLA TION OPERATION AND MAIN TENANCE STORAGE Motors must be stored in a clean dry well ventilated location free from vibration and rapid or wide temperature variations If the unit is to be stored longer than three months consult the factory Ball bearing motors are shipped from the factory properly lubricated and ready to operate When in storage the motor shaft must be tumed several rotations every month and the bearing re lubricated every year On non explosion proof TEFC motors a removable plug in the bottom of the frame or housing per mits removal of accumulated mois 4 INSPECTION Care is taken at the factory to assure that the motor arrives at its destination in first class condition If there is evidence of rough hand
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