UL 984 CRD-2011 UL Standard for Safety Hermetic Refrigerant Motor-Compressors - Section Paragraph Reference 1 1 2 Table 13 4 16 41 Appendix B and C Subject Hermetic Refrigerant Mot.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a

2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): SLIS2, SLLG2, SLLX2, SLNU2Standard Number: UL 984Edition Date: May 31, 1996Edition Number: 7Section / Paragraph Reference: 1.1, 2, Table 13.4, 16, 41, Append

3、ix B and CSubject: Hermetic Refrigerant Motor-Compressors High-Voltage Motor-Compressors Rated Over 7,200 V and up to 15,000 VDECISION:1 Scope(REVISED) 1.1 This Standard applies to hermetic refrigerant motor-compressors (hereinafter referred toas motor-compressors) rated 15,0007200 V or less, for us

4、e in air-conditioning and refrigerating equipmentthat comply with the Standards applicable to such equipment.2 Definitions(NEW) Form wound motor A motor using insulated rectangular shaped conductors that are wrappedwith additional electrical insulation over the entire coil prior to insertion and are

5、 precisely positioned andformed into coils.(NEW) Random wound motor A motor using insulated round conductors in which the winding turnsoccupy random positions in a slot.13 Electrical SpacingsTable 13.4Spacingsdfor high voltage circuits greater than 750 V inside and outside motor-compressorenclosureM

6、inimum spacing, mm (in)Voltage range, V Through spacecOver surface751 1000 10 (3/8) 13 (1/2)1001 2000 19 (3/4) 34 (1-3/8)2001 3000 25 (1) 50 (2)3001 5000a63 (2-1/2) 75 (3)3001 5000b82 (3-1/4) 100 (4)5001 7200a75 (3) 88 (3-1/2)5001 7200b100 (4) 125 (5)7,201 12,500a112 (4-3/8) 127 (5)7,201 12,500b134

7、(5-1/4) 178 (7)12,501 15,000a127 (5) 146 (6)12,501 15,000b152 (6) 203 (8)aBetween uninsulated live parts and grounded noncurrent-carrying metal parts.bBetween uninsulated live parts of opposite polarity.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION

8、 FROM ULTable 13.4 ContinuedMinimum spacing, mm (in)Voltage range, V Through spacecOver surfacecThrough air for outside of the motor-compressor enclosure.dFor form wound motors, the spacings in the table are not specified if the wiring is covered with insulation complying with thecompatibility tests

9、 in Section 41 and provided in addition to the film coating.16 Short-circuit protection(REVISED) 16.1 Motor overload protective devices and thermal protective devices shall comply with theapplicable limited short-circuit requirements for the class of protective device. For devices rated 600 voltsor

10、less, see Section 31.(NEW) 16.2 In reference to 16.1, protective devices rated over 600 volts shall comply with the Standardfor Medium-Voltage AC Contactors, Controllers and Control Centers, UL 347.(REVISED) 41.7 For random wound motors, Motorettes motorettes shall are to be prepared as describedin

11、Appendix B. IEEE 117-1974 (R 1991), Test Procedure for Evaluation of Systems of Insulating Materialsfor Random Wound AC Electric Machinery. Coilettes are to include a typical slot assembly fabricated fromtwo metal plates bolted together. The slot section of the motorette or coilette shall be fabrica

12、ted from steelsheets, such as AISI 1010 cold-rolled steel or other motor-steel sheets. The assembled slot portion shallcontain two coils approximately 15 to 20 turns each, insulated from ground by slot cells, insulated fromeach other by phase insulation if used in the motor application, and held in

13、place with slot wedges. Eachcoil shall be wound with two parallel wires so that turn-to-turn tests may be made. Film-coated magnetwire, No. 18 AWG (0.82 mm2), is to be used for coil construction. Minor modifications of the motorette orcoilette assemblies can be made to simulate intended uses.(NEW) 4

14、1.7.1 Form wound motorettes shall be prepared as described in Appendix C. Minor modificationsof the motorette assemblies can be made to simulate intended uses.(REVISED) 41.8 For random wound motors, as As an electrical check, prior to the refrigerant and oilexposure, the test specimens shall withsta

15、nd a 60 Hz ac potential of 2000 V applied for 1 minute betweencoils and between coils and dead metal parts; and a 60 Hz ac potential of 400 V applied for 1 minutebetween the parallel wires described in Clause 41.7 to simulate the turn-to-turn condition.(NEW) 41.8.1 For form wound motors and as an el

16、ectrical check, the test specimens shall withstand for1 minute a 60 Hz ac potential of 1000 volts plus twice rated voltage applied between coils, and betweencoils and dead metal parts; and shall withstand a 60 Hz potential of 500 volts applied for 1 minute betweenthe parallel wires to simulate the t

17、urn-to-turn condition.(REVISED) 41.14 For random wound motors, afterAfter the final temperature cycle, the test samples shallwithstand for a period of 1 minute each, a 60 Hz ac potential of 600 V applied betweena) windings; andb) windings and grounded metal;and a 60 Hz ac potential of 120 V for moto

18、rs rated 0 600 V and a potential equal to the maximum ratingof the motor for motors rated 601 7200 V applied between turn-to-turn insulation. The acceptance of theinsulation system is to be based on the performance of five of the six samples if six samples are tested.If two samples are tested, both

19、must meet the test criteria.STANDARD NUMBER: UL 984 -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL(NEW) 41.14.1 For form wound motors, following the final temperature cycle, the test samples shallwithstand for a period of 1 minute each, a

20、 60 Hz ac potential equal to:a) The maximum rating of the motor applied between coil windings as well as between coilwindings and dead metal parts; and,b) 500 volts applied between the turn-to-turn windings.(NEW) 41.14.2 In reference to 41.14.1, five of the six specimens shall comply with the test c

21、riteria if sixspecimens are tested, or all specimens shall comply with the test criteria if two specimens are tested.(REVISED) 41.18 Six twisted pairs of film-coated magnet wire made in accordance with Test Method forRelative Thermal Endurance of Film-Insulated Round Magnet Wire, ASTM D2307-94, or s

22、ix straightlengths of fibrous-covered or turn-taped square, rectangular, or round magnet wire, whichever isapplicable, are to be placed in sealed vessels and exposed to the refrigerant and oil mixtures andtemperature-time-pressure values as described in Clause 41.13. Other parts of the insulating sy

23、stem ofan amount approximately proportional to their use in the system shall also be included. If one or more ofthese parts are involved in the change, six samples of each new part of a size sufficient to conduct thetest specified in Table 41.2 are also to be included.(REVISED) 41.21 At the end of t

24、he refrigerant and oil exposure, the magnet wire samples shall besubjected to a dielectric strength test in accordance with Test Methods for Dielectric Breakdown Voltageand Dielectric Strength of Solid Insulating Materials at Commercial Power Frequencies, ASTM D149-93a.For straight lengths of fibrou

25、s-covered or turn-taped square, rectangular, or round magnet wire, samplesare to be prepared in accordance to the “Foil Electrode Method” in NEMA MW 1000. For other functionalparts involved in minor changes, such as leads, tubing, tapes, barriers, and tie cords, applicablecomparative dielectric stre

26、ngth or mechanical tests, as stated in Table 41.2, shall be conducted todetermine the effects of the refrigerant-oil exposure.(NEW)Appendix B Random Wound Motorette Construction(Informative)B.1 This annex suggests appropriate test specimens for evaluating insulating materials and systems usedon the

27、inside of motor-compressor housings if motorettes are used in accordance with 41.7. The type ofmotorette as defined in the following will adequately represent random-wound motors of 600 V rating orless.B.2 Figure B.1 shows typical components of the motorette before final assembly. Each of thesecompo

28、nents should be subjected to separate screening tests to establish uniformity and normality beforethey are assembled. For example, a number of representative samples of the wire, slot insulation, phaseinsulation and so forth, may be subjected to dielectric voltage-withstand or other tests. Everythin

29、g possibleshould be done to assure that the individual components are uniform and representative of the materialsused in actual service.This is generated text for figtxt.STANDARD NUMBER: UL 984 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM

30、ULB.3 The finished motorette shown in Figure B.2 is to consist of a rigid supporting metal frame with foursuitable stand-off porcelain insulators bolted to one end and with a slot portion, made from an inner andouter plate, bolted to the other end. The motorette frame has holes for mounting the fixt

31、ure during testing.The slot sections are fabricated from 1,52 mm (0,060 in.) thick steel sheets. The assembled slot portioncontains two coils insulated from ground by slot insulation, insulated from each other by phase insulationand held in place with slot wedges. These components are to be typical

32、parts used in actual motors. Thecoils are each wound with two parallel wires so that conductor-to-conductor electrical tests may be made.They can be machine wound on pins or forms, as in ordinary shop practice. In special cases, theconstruction and processing procedures may be modified to simulate t

33、he intended use.This is generated text for figtxt.Figure B.1Components of motorette before final assemblySTANDARD NUMBER: UL 984 -4-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULB.4 The following is a detailed description of the motorette co

34、mponents:B.4.1 Wire Film coated magnet wire, sized 0,82 mm2(18 AWG).B.4.2 Slot Insulation Maximum 0,25 mm (0,01 in.) thick sheet insulation. Sized 70 mm (2-3/4 in.) wideby approximately 51 mm (2 in.) long such that it completely insulates the wire coils from the metal innerand outer slot plates. The

35、 edges of the insulation should be turned back 3,2 mm (1/8 in.) reducing the finalwidth to 64 mm (2-1/2 in.). Approximately 4,8 mm (3/16 in.) of the insulation can then be made to projectfrom each end of the slot plates.B.4.3 Phase Insulation Maximum 0.25 mm (0.01 in.) thick sheet insulation consist

36、s of two strips eachsized 76 by 13 mm (3 by 1/2 in.) and one circular piece 64 mm (2-1/2 in.) diameter with a 38 mm (1-1/2in.) diameter hole in center. The circular pieces are then cut in half to form two semi-circles. The insulationis to be placed between the two coils such that an overlap of appro

37、ximately 6,4 mm (1/4 in.) existsbetween each semi-circle of insulation and each rectangular piece.NOTE: The thickness specified for the slot and phase insulation is given as a maximum value. A lesser thickness for these partsmay be required if the actual thickness of the parts will be less than the

38、specified value.B.4.4 Slot Wedges Should be cut from preformed U-shaped stock sized 9.5 mm (3/8 in.) wide at thebase and 76 mm (3 in.) long. One end of the wedge should be rounded to ensure easy passage throughthe slot.B.4.5 Protective Sleeving Sized to cover each lead from the mid-point inside the

39、slot to each terminal.B.4.6 Tie Cord Sufficiently long to tie coil and leads togetherFigure B.2Completely assembled and varnished motoretteSTANDARD NUMBER: UL 984 -5-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULB.4.7 Binding Tape 13 mm (1/2

40、 in.) wide electrical tape intended for securing wires within each coils.B.4.8 Insulating Varnish Electrical grade.B.4.9 Motorette Frame See Figure B.3; frame is sheet steel approximately 1,52 mm (0,060 in.) thick.Overall sized 206 mm (8-1/8 in) long by 51 mm (2 in.) wide. Three part construction co

41、nsists of the baseframe, outer slot plate and inner slot plate described in B.4.9.1 to B.4.9.3. Two approximately 7 mm (1/4in.) diameter hex bolts and appropriately sized nuts are used to secure the outer and inner slot plates tothe base frame.B.4.9.1 Base Frame 9,5 mm (3/8 in.) high. A supporting b

42、lock for the inner and outer slot platesprotrudes 13 mm (1/2 in.) above the base frame such that the overall height of the base and supportingblock is 22 mm (7/8 in.) high. Four 4 mm (5/32 in.) diameter openings are provided at one end of the baseframe for mounting the insulators. Centers of two ope

43、nings are located 11 mm (7/16 in.) from edge of baseand centers of the other two openings are located 30 mm (1-3/16 in.) from the edge of the base. Openingsare 19 mm (3/4 in.) apart with an opening in each row located 11 mm (7/16 in.) from each side. Two 5mm (3/16 in.) diameter mounting holes are ce

44、ntered within the frame and 157 mm (6-3/16 in.) apart withone of the openings located 11 mm (7/16 in.) from the end of the base. Two 8 mm (5/16 in.) openings forthe bolts are centered on the support block with the center of each opening 13 mm (1/2 in.) from eachedge of the supporting block.B.4.9.2 O

45、uter Slot Plate Overall sized 54 mm (2-1/8 in.) long by 64 mm (2-1/2 in.) wide by approximately22 mm (7/8 in. high) with two 8 mm (5/16 in.) bolt openings centered on the plate with the center of eachopening 13 mm (1/2 in.) from each edge of the supporting block. Upturned edges at each side are bent

46、inward toward the bolt holes approximately 5 from the vertical with the uppermost 3 mm (1/8 in.) bentfurther inward 45.B.4.9.3 Inner Slot Plate Overall sized 54 mm (2-1/8 in.) long by 38 mm (1-1/2 in.) wide by approximately21 mm (13/16 in. high) with two 8 mm (5/16 in.) bolt openings centered on the

47、 plate with the center ofeach opening 13 mm (1/2 in.) from each edge of the supporting block. Upturned edges at each side arebent outward away from the bolt holes approximately 5 from the vertical with the uppermost 3 mm (1/8in.) bent further outward 45. Fits on top of the outer slot plate.This is g

48、enerated text for figtxt.STANDARD NUMBER: UL 984 -6-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULB.5 A motorette is to be assembled as described in B.5.1 B.5.10.B.5.1 Winding Coils Each coil is to be composed of two parallel wires such that

49、 each coil is wound with20 turns of wire (for a total of 40 wires per coil and 80 wires in each slot since there are two coils). Thecoils are to be tightly wound in the form of an oval with parallel sides extending that are approximately 64mm (2-1/2 in.) long. The parallel sides are to be separated by 44 mm (1-3/4 in). The round end of the ovalis to be a 44 mm (1-3/4 in.) diameter semicircle. Four ends of each coil are to be located such that theends forming the leads (active ends) are to be separated and taped with one l