UL-508-BULLETINS-2004.pdf

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1、Subject 508 (60947-1, 60947-4-1) (in reply, refer to Subject 508) 12 Laboratory Drive Research Triangle Park, NC 27709 December 13, 2004 TO: Standards Technical Panel (STP) for Industrial Control Equipment, STP 508 Subscribers to ULs Standards Service for Other Interested Parties Industrial Control

2、Equipment SUBJECT: Report of the Meeting of the Standards Technical Panel of UL for STP 508; Request for Comments on the Proposed Requirements for the Seventeenth Edition of the Standard for Industrial Control Equipment, UL 508; PROPOSED EFFECTIVE DATES Summary of Topics The following topics were di

3、scussed at the meeting: I ) UL 60947-5-1 Harmonization Effort 2) UL 60947-5-2 Harmonization Effort 3) UL 61131-2 Harmonization Effort 4) UL 60947-1 b) Each input terminal shorted to referenced ground terminal; c) Each output terminal shorted to referenced ground terminal; d) Each input terminal shor

4、ted to each power supply; e) Each output terminal shorted to each power supply; and f) Each terminal open-circuited. 8) CONTROL TRANSFORMER PROTECTION (Only affected part of Table 67. I shown) -,-,- SUBJECT 508 Marking reference -A2- Required markinga Locationb Enclosed I Open DECEMBER 13,2004 - 75.

5、7 Table 67.1 Marking location for industrial control equipment Control transformer Drotection - G - G instructions 73.1.3 A manual motor controller that complies with 73.1.2 is able to provide overcurrent protection for a control transformer when provided with installation instructions in 75.7. 75.7

6、 A manual motor controller as described in 73.1.3 shall be provided with instructions that include the following: a) The device is to be installed only on the load side of branch circuit protection; b) The current adjustment of the manual motor controller set at not more than the rated input current

7、 of the control transformer; c) A wiring diagram specifying the proper connections for use as a control transformer overcurrent protection device; d) Manual motor controllers marked as in 75.4, can only be used in the specific supply voltage system as marked on the device, such as 120/240, 480Y/277,

8、 or 600Y/347. 9) RESISTORS WITH INTERMITTENT DUTY RATINGS 174B.1.1 A resistor with non-continuous duty ratings shall be subjected to a current equal to the maximum non-continuous current rating throughout the whole or any part of the resistance elements until the operation of an integral protective

9、device or constant temperatures. Exception: A non-continuous duty resistor intended for use only as an integral part of an adjustable speed drive shall be evaluated to the requirements in the Standard for Power Conversion Equipment, UL 508C. I O ) DEFINITE PURPOSE CONTROLLERS 163.1 A definite purpos

10、e controller for use with hermetic refriaeration cornmessors shall be rated in full load and locked rotor amperes followed bv “hermetic refriaeration cornmessor“ or “herm. refria. comD.“ 6 -, volts, and frequency. The rating shall include the number of phases unless the controller is obviously inten

11、ded for single phase use. 11) FLOAT SWITCHES FOR USE WITH SUMP PUMPS (Only affected part of Table 67. I shown) SUBJECT 508 Marking reference -A3- Required markinga Locationb Enclosed I Open DECEMBER 13,2004 - 116.3 Float switch for use with thermallv orotected sumo Table 67.1 Marking location for in

12、dustrial control equipment - A - 108.1 AV , cord-connected device shall be provided with a length of hard service or junior hard service flexible cord and shall comply with 25.6.1.2 and 25.6.1.4. Exception: A cord-connected float switch orovided with a 15A attachment olua and receotacle intended for

13、 use with sinale ohase thermallv orotected sumo oumos shall be: Provided with an 18 A WG cord when rated not more than 7.2 FLA. or orovided with a 16A WG cord when rated not more than 9.8 FLA: and Marked as in I 16.3. 116.3 A float switch constructed as described in the exception to 108.1 shall be m

14、arked, “For use only with thermally protected sump pumps“, or the equivalent. 12) SWITCHES WITH IDENTIFIED “OFF POSITION 16.7 A switch intended for mounting in an outlet box and with an identified “off“ function, such as a marked “OFF“ or “O“ switch position, shall be constructed such that when the

15、switch is in the “off“ mode, all ungrounded conductors are completely opened by means of an air gap between the line and load terminals. %wWeMwt G : C GE I p- GE G For examde, switches incorporating in-line components, such as 8 neon indicators, jhat Dass CU rrent jhrouah the load when the switch is

16、 oDe n, shall not be marked “OFF“ or “O“. nnrrn _r rinn . . nb I W I L U 13) MISCELLANEOUS REVISIONS 6.3.1 The thickness of a sheet-metal enclosure shall not be less than that specified in Tables 6.1 and 6.2, except that at points to which a wiring system is to be connected, uncoated steel shall be

17、at least 0.032 inch (0.81 mm) thick, MC CG- C.CM-trxF ( C . - , and nonferrous metal at least 0.045 inch (1.14 mm) thick. Exception: Enclosure thickness at points other than where a wiring system is to be connected f?ee or b) The device complies with 6.17. I for the accessibility of live parts with

18、the polymeric part removed and any internal parts that do pose a risk of fire or electric shock are enclosed by barriers that comply with 624 6 . 5 . 1 or 6.5.3, and 8.2. -,-,- SUBJECT 508 -A5- DECEMBER 13,2004 Table 6.6 Bonding conductor short-circuit test capacity HorseDower 112 112 over 112 to 1

19、1 to 3 over 3 to 7-112 over 7-112 to 4-0 a over 4-0 1 to 50 over 50 to 200 over 200 Controller rating IkW OutDut I Volts Circuit capacity amperes i (0.373) (0.373) (0.374 - 0.746) (0.747 - 2.24) (2.25 - 5.59) (5.60 - 7.46) (7.47 - 37.3) (37.4 - 149) (over 150) O - 250 251 -600 O - 600 O - 250 O - 25

20、0 O - 250 251 -600 O - 600 O - 600 200 1,000 1,000 2,000 3,500 5,000 5,000 10,000 a a See Table 51.3. 6.6.2 The continuity of a conduit system shall be provided by metal-to-metal contact not relying on a polymeric material. Exception: The continuity of the grounding system may rely on the integrity

21、of the polymeric enclosure if samples have been subjected to the creep test requirements in the Standard for Evaluations. UL 746C. Overcurrent Tests shall be conducted at 200 percent of the rated current of the branch circuit-pro tective de vice. A , I - l l f b f f I I , f 1y L Polvmeric Materials

22、- Use in Electrical EauiDment 6.8.2 No covering is required across the bottom of aft TvDe 1. 2. 3R. or 3RX enclosures of a floor-mounted controller if the enclosure is within 6 inches (152 mm) of the floor or less and if exfmxd uninsulated live parts within the device are at least 6 inches above the

23、 highest portion of the lower edge of the enclosure. 6.9.3 A ventilation opening in the top of a Type 1 enclosure shall be covered by a hood or protective shield spaced above the opening when there are metgeed yninsulated components below the opening, and shall be in accordance with 6.9.4. 11 .I .I

24、An enclosure having multiple compartments with different environmental ratings shall indicate on the nameplate, “Install in Type _ Environment“, or the equivalent where the marked type number is the type designation of the eempmmt comDartment affording the least protection from external conditions a

25、s specified in the table for enclosure types, in the Standard for Enclosures for Electrical Equipment, UL 50. Additional nameplate information regarding the level of protection provided for an individual compartment shall follow and be less prominent than the above marking. 15.1 A material that is u

26、sed for the direct support of an uninsulated live part shall comply with the Relative Thermal Index (RTI), Hot Wire Ignition (HWI), High-Current-Arc Resistance to Ignition (HAI), and Comparative Tracking Index (CTI) values indicated in Table 15.1. A material is in direct support of an uninsulated li

27、ve part when: a) It is in direct physical contact with the uninsulated live part; and b) It serves to physically support or maintain the relative position of the uninsulated live part with resDect to sDac na reauiremenb. SUBJECT 508 -A6- DECEMBER 13,2004 Exception: A generic material provided in the

28、 thickness indicated in Table 15.2 complies with 15.1 without additional evaluation. (CURRENT) (PROPOSED) 25.5A.1 A field-wiring pressure wire connector provided with or specified for use with industrial control equipment shall comply with one of the following, as applicable: a) The performance requ

29、irements in the Standard for Wire Connectors, UL 486A-486B; or b) The performance requirements in the Standard for Equipment Wiring Terminals for Use With Aluminum and/or Copper Conductors, UL 486E. (CURRENT) . . . . 25.5A.2 fr a be a8 spee or b) The cord is used in circuits which comply with Class

30、2 or Limited Voltaae/Cu rrent Isolated Secondary Circuits, Section 32. 25.6.1 .I Equipment is able to be cord-connected to the power supply when the equipment is: a) Portable; . . b) Free standing or stationary (mhked t a binidmg not Dermanentlv connected to bu ilding wiring); c) A pendant; or d) As

31、 described in 25.6.7 SUBJECT 508 Open circuit volts (peak) O - 20 O - 28.3) Over 20 - 30 128.3 - 42.4) -A8- amperes 5.0 1 O O W DECEMBER 13,2004 Voltage between Table 32.1 Rating for fuse or circuit protective device Minimum spacings in inches (mm) Between uninsulated parts of opposite polarity on I

32、 Between uninsulated parts on line side and any Equipment intended for installation in a .deder circuit line side I grounded dead metal parts involved Over surface I Thouah air Over surface I Throuah air 36.1.1 Other than as noted in Section 39. Clearance and CreeDaae Distances. the electrical spaci

33、ngs in industrial control equipment rated 601 - 1500V shall not be less than the applicable value specified in Table 36.1A. 36.5 The primary circuit spacings in industrial control pmee% eau iDment intended for use in a pollution degree 2 environment shall be at least those specified in Tables 36.3 a

34、nd 36.4. 36.16 In a pushbutton, selector switch, limit switch, or the like, opposite polarity is not considered to exist on any one pole, including double-throw arrangements; but opposite polarity is considered to exist between poles and between live parts on adjacent units unless the parts in quest

35、ion are connected to the same line terminal or conductor and the device is marked as indicated in 64.12 or 140.4. SUBJECT 508 -Ag- DECEMBER 13,2004 HP 112 314 1 1-112 2 3 5 7-112 10 15 20 25 30 40 50 60 75 100 125 150 200 250 300 350 400 450 500 JOTES Table 45.4 Locked-rotor motor currents correspon

36、ding to various a-c horsepower ratings (3-phase) 110-120V Motor designations B, C, f D 40 40 50 53 60 68 80 88 100 =K 128 +46 184 %4 254 366 324 45 464 G4 580 848 730 W 870 4248 1160 %48 1450 286Q - - - - - - - - - - - - - - - - - - - - - - - - designations B, C, D 23 28.8 34.5 46 57.5 73.6 105.8 14

37、6 186.3 267 334 420 500 667 834 1001 1248 1668 2087 2496 3335 - - - - - - E 23 %- 2-4-5 46 57% 84 4-40 H 3 E 9 388 546 646 77% 948 +i% =Ma W and b) The equipment complies with the applicable requirements of this standard when incorporating the isolated secondary circuit that results from the failure

38、 of a single spacing or single component fault. SUBJECT 508 -A21 - DECEMBER 13,2004 Standard reference section 43 44 36.12 For other than providing isolation between different circuits, 8 in a safety circuit, or as defined in 34.1.2, spacings between traces of different potential on a printed wiring

39、 board are not required to comply with the spacing requirements of this Standard when: Test Sample numbera Number of cycles 1000b 1000b 6000 6000 6000 6000 100,000 100,000 6000s 6000s b) The printed wiring board base material has a minimum Comparative Tracking Index (CTI) of 100 volts: and Test cycl

40、e times, seconds On Off f f f f I d 9d I d 9d I d 9d I d 9d I d 9d I d 9d l e 59e l e 59e c) The equipment complies with the Printed Wiring Board Abnormal Operation Test, Section 60. Rated Current Rated Current. See Rated Current. See 46.4 - 46.7. 46.4 - 46.7. 18) ELECTRONIC BALLASTS 1 .o 1.0 dc Tab

41、le 42.1 Sequence of tests 45 Overload 46 Endurance I 1 2 49 I Dielectric Voltage Withstand I 3 I 3 a All or any combination of sequences may be conducted on a single sample if agreeable to those concerned. One sequence need not be completed as a prerequisite to the starting of another. and dielectri

42、c. Section 49. usina new untested samples and loads specified for electronic ballasts. See Table 46.1 and Section Devices intended for use with AC Electrical Discharae Lamps mav reauire additional test seauence for endurance, Section 46, Intended device application Across-the-Line AC Motor Startinga

43、 Across-the-Line DC Motor Starting DC General Use AC General Use DC Resistance AC Resistance DC Resistance Air Heating1 AC Resistance Air Heating1 AC Incandescent Lamps (Tungsten) DC Incandescent Lamps (Tunasten) Table 46.1 Endurance test Test current, Power factor amperes Twice Full-Load Current Tw

44、ice Full-Load Current Rated Current Rated Current Rated Current Rated Current Rated Current 0.40 - 0.50 0.75 - 0.80 1 .o Table 46.1 Continued on Next Page -,-,- SUBJECT 508 -A22- Table 46.1 Continued DECEMBER 13,2004 Intended device application AC Electrical Discharge Lamps (Standard Ballast) AC Ele

45、ctrical Discharae Lamps (Electronic Ballast) Elevator Control, AC hp Elevator Control, DC hp Capacitive Switching (kVar) Test current, amperes Twice Rated Current k Twice Full-Load Current Twice Full-Load Current Rated Current Power factor 0.40 - 0.50 k 0.40- 0.50 dch I Number of cycles 6000 500,000

46、 500,000 6000 Test cycle ti On ?s, seconds Off a For an alternating current combination controller, the manual switch is to be tested for 6000 cycles at the rate of 6 cycles per minute at 0.75 - 0.80 power factor, and at rated full-load current. These devices are to be subjected to at least 6000 mec

47、hanical cycles at any convenient rate. If the device is marked “resistance only “ in accordance with 63.7, the test may be conducted using a noninductive resistance The cycle times are to be shown or as described in 45.12. load. This “resistance only“ rating is different than a resistance heating ra

48、ting or a resistance air heating rating. e A control may be operated faster than 1 cycle per minute if synthetic loads are used or if a sufficient number of banks of lamps controlled by a commutator are employed so that each bank will cool for at least 59 seconds between successive applications. Oth

49、er than as noted in note a, the test cycle is to be as indicated in Table 46.2. For a magnetic relay intended to turn a television receiver on and off, and marked in accordance with 63.22, the number of Load is a noninductive resistive load. test cycles is to be 25,000. Applicable only to a device that controls the power to a resistance heating element used for comfort heating, and is controlled by an automatic reset safety control req