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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 508 (60947-1, 60947-4-1) November 17, 2006 SUMMARY OF TOPICS The following topics were discussed at the meeting: 1. UL 60947-1 and from d) and put it on the end of e).This proposal will proceed to ballot. Change heading of Section
2、 18.5 from Open-Phase Protection to Phase Loss Protection.This proposal will proceed to ballot. In paragraph 23.1, the following statement should be placed before Temperature Test, Section 43., .applicable construction requirements in Sections 4 41 of this standard and the. in paragraph 23.1. This p
3、roposal will proceed to ballot. Add f) minimum 14 AWG for power circuits. to paragraph 25.5.1.Paragraph 25.5.1 was revised and defi nitions for feeder and power circuit were added from UL 508A. These proposals will proceed to ballot. Change reference in paragraph 26.1 from UL 1950 to UL 60950-1. Add
4、 this standard to Appendix A.This proposal will proceed to ballot. The exception to paragraph 37.3 should be adjusted (indented more) to the left. It appears that it is an exception to part 3) of (c) but it is an exception to all of (c).The exception was revised to clarify which item it applies to.
5、This proposal will proceed to ballot. The reference in paragraph 44.4 should be to 44.1 instead of 45.1.This proposal will proceed to ballot. The UL 840 references in paragraph 45.2 should be to Section 7 and Table 7.1 instead of Section 5 and Table 5.1.This proposal will proceed to ballot. In Table
6、 46.1, change AC Electrical Discharge Lamps (Electronic Ballast) to AC Electrical Discharge Lamps (Electronic Fluorescent Ballast).This proposal will proceed to ballot. NOVEMBER 17, 2006SUBJECT 508-14- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carol
7、ina State University/5618801100 Not for Resale, 11/22/2006 00:15:01 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Add new paragraph 51.1.2.3 as follows: 51.1.2.3 Testing shall be conducted with Class H and K fu
8、ses. Change numbering of existing paragraphs 51.1.2.3 and 51.1.2.4 to 51.1.2.4 and 51.1.2.5 respectively. Proposed new paragraph 51.1.2.3 was revised and it was decided to proceed to ballot this item as a separate ballot item from the other miscellaneous revisions. Add following sentence to the end
9、of paragraph 51.2.1 Samples for the test are to be selected among motor control devices employing the largest and smallest size current element that may be used with the protective device specifi ed for the motor control device.This proposal will proceed to ballot. Change the heading of Section 61C
10、from Electronic Ballasts to Electronic Fluorescent Ballasts.This proposal will proceed to ballot. Change paragraph 106.3 as follows, A polymeric material that is used as the enclosure for a fl oat switch or encloses or acts as a partial enclosure of electrical components in a fl oat operated switch
11、shall comply with 6.5.1 and the Water Exposure and Immersion Tests in the Standard for Polymeric Materials Use in Electrical Equipment Evaluations, UL746C.This proposal will proceed to ballot. Change paragraph 106.4 as follows, The enclosures of a fl oat-operated switches, incorporating complete or
12、partial enclosures of electrical components, such as those constructions meant to be mounted to the wall of a vessel, and pressure operated switches incorporating complete or partial enclosures of electrical components, such as those constructions meant to be mounted to the wall of a vessel shall co
13、mply with the construction, performance, and marking requirements for enclosures in Sections 6 11 of UL 508. This proposal will proceed to ballot. Revise Table 148.1 as follows: Remove the 2 (calibration test) from column 3. Add a new column between columns 1 and 2, name 2 and put a number 1 in the
14、calibration row. Renumber columns 2, 3 and 4 as 3, 4 and 5 respectively.This proposal will proceed to ballot. Revise paragraph 151.1 as follows, After the short-circuit tests in 149.1 and 150.1, The device shall comply with the calibration testing specifi ed in Section 48.This proposal will proceed
15、to ballot. Remove exception to paragraph 174B.1.1.Based upon STP feedback, it was decided to proceed to ballot this item as a separate ballot item from the other miscellaneous revisions. PROPOSALS 2.9.1 FEEDER CIRCUIT The conductors and circuitry on the supply side of the branch circuit overcurrent
16、protective device. 2.20.1 POWER CIRCUIT Conductors and components of branch and feeder circuits. 18.5 Phase loss Open-phase protection 23.1 A transformer employed in industrial control equipment shall comply with the appropriate UL standards for transformers, unless the load is part of the equipment
17、, in which case the transformer shall comply with the applicable construction requirements in Sections 4 41 of this standard and the Temperature Test, Section 43, and the Dielectric Voltage-Withstand Test, Section 49, in this standard. Exception:Pulse and current transformers constructed in a manner
18、 other than allowed by the applicable UL transformer standard are considered to be in compliance with this requirement if they can withstand, without breakdown, a dielectric voltage withstand potential in accordance with Section 49, applied NOVEMBER 17, 2006SUBJECT 508-15- Copyright Underwriters Lab
19、oratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 11/22/2006 00:15:01 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION between the primary and
20、the secondary windings. An example of transformer constructions for which this exception would apply are those that may rely upon magnet wire coating to provide isolation instead of inter-winding tape. 25.5.1 Except as noted in 25.5A.5, industrial control equipment shall be provided with wiring term
21、inals or leads for connection of conductors having an ampacity or wire size not less than the largest of the following for each fi eld wiring terminal: a) The ampere rating of the circuit equipment. b) One-hundred twenty-fi ve percent of the full-load motor current specifi ed in Table 45.2 or 45.3 f
22、or the horsepower rating, or, in the case of power conversion equipment, in which the input current is different from motor full-load current, 125 percent of maximum rated input current. c) One-hundred twenty-fi ve percent of the resistive ampere rating of the devices intended to control fi xed elec
23、tric space-heating equipment loads. d) For equipment controlling a direct-current motor intended to be operated from a rectifi ed single-phase power supply; 1) One-hundred ninety percent of full load current when a half wave rectifi er is used. 2) One-hundred fi fty percent of full load current when
24、 a full wave rectifi er is used. Exception:Item (d) does not apply when the product is marked in accordance with 65.9. e) 14 AWG (2.1 mm2) for control, signal, or sensor circuits unless the terminals are intended and marked (on product or installation instructions) for the connection of smaller cond
25、uctor size or sizes. f) Minimum 14 AWG (2.1 mm2) for power circuits. 26.1 Auxiliary units such as portable programmers intended to be used only on a temporary basis, to diagnose or program industrial controls shall comply with the Standard for Information Technology Equipment Safety - Part 1: Genera
26、l Requirements, UL 60950-1 Information Technology Equipment, UL 1950. These units may be considered as a subsystem of the industrial electronic control equipment. 37.3 When a barrier is used to comply with spacing requirements, the insulating material used shall comply with at least one of the follo
27、wing criteria: a) Be a generic direct support material provided in the thickness indicated in Table 15.2; b) Be a generic barrier material provided in the thickness indicated in Table 37.1 when the insulating barrier does not physically support or maintain the relative position of the uninsulated pa
28、rts involved; or c) Comply with the direct support requirements in Table 15.1 at a thickness that meets at least one of the following: 1) Not less than 0.028 inch (0.71 mm) thick; 2) Not less than 0.013 inch (0.33 mm) thick plus one-half required clearance spacings when the barrier is provided in li
29、eu of required clearance distance only; or NOVEMBER 17, 2006SUBJECT 508-16- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 11/22/2006 00:15:01 MSTNo reproduction or networking permitted without license
30、 from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION 3) Capable of withstanding the 5000V ac Dielectric Strength Test in accordance with the internal barrier requirements in the Standard for Polymeric Materials - Use In Electrical Equipment Evaluations, UL 746C. Exception:Wi
31、th regard to 37.3(c), when the barrier is provided in lieu of clearance distance only, is not within 1/32 inch (0.8 mm) of uninsulated live parts, and does not physically support or maintain the relative position of uninsulated parts involved, the insulating material is only required to comply with
32、the RTI and HAI values in Table 15.1. 44.4 The control circuit voltage is to be increased to the overvoltage test value stated explained in 44.1 45.1 until constant temperatures are observed using the thermocouple method. The voltage is then to be rapidly reduced to the temperature test voltage and
33、the control circuit is to be immediately opened and closed several times to determine if full closure of the armature results. 45.2 Line and load terminals of industrial control equipment having clearances in accordance with Clearance B (Controlled Overvoltage), Section 7 5, in the requirements of t
34、he Standard for Insulation Coordination Including Clearances and Creepage Distances for Electrical Equipment, UL 840, are to be monitored for overvoltages during operation at rated operational voltage under load and no-load conditions. Generated voltages shall not be greater than the lowest impulse
35、withstand voltage rating specifi ed in Table 7.1 5.1 of UL 840. This monitoring is to be done during the overload test by an oscillographic study. Table 46.1 Endurance test Intended device application Test current, amperes Power factorNumber of cyclesTest cycle times, seconds OnOff Across-the-Line A
36、C Motor Startinga Twice Full-Load Current 0.40 0.501000bff Across-the-Line DC Motor Starting Twice Full-Load Current dch1000bff DC General UseRated Currentdch60001d9d AC General UseRated Current0.75 0.80c60001d9d DC ResistanceRated Currentdch60001d9d AC ResistanceRated Current1.060001d9d DC Resistan
37、ce Air Heatingi Rated Currentdch100,0001d9d AC Resistance Air Heatingi Rated Current1.0100,0001d9d AC Incandescent Lamps (Tungsten) Rated Current. See 46.4 46.7. 1.06000g1e59e DC Incandescent Lamps (Tungsten) Rated Current. See 46.4 46.7. dc6000g1e59e AC Electrical Discharge Lamps (Standard Ballast)
38、 Twice Rated Current 0.40 0.50600019 AC Electrical Discharge Lamps (Electronic Fluorescent Ballast) kk600019 Elevator Control, AC hp Twice Full-Load Current 0.40 0.50500,00019 NOVEMBER 17, 2006SUBJECT 508-17- Table 46.1 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS
39、under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 11/22/2006 00:15:01 MSTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 46.1 Continued Intended device application Test c
40、urrent, amperes Power factorNumber of cyclesTest cycle times, seconds OnOff Elevator Control, DC hp Twice Full-Load Current dch500,00019 Capacitive Switching (kVar) Rated Currentj60001d9d a For an alternating current combination controller, the manual switch is to be tested for 6000 cycles at the ra
41、te of 6 cycles per minute at 0.75 0.80 power factor, and at rated full-load current. b These devices are to be subjected to at least 6000 mechanical cycles at any convenient rate. c If the device is marked resistance only in accordance with 63.7, the test may be conducted using a noninductive resist
42、ance load. This resistance only rating is different than a resistance heating rating or a resistance air heating rating. d The cycle times are to be shown or as described in 45.12. e A control may be operated faster than 1 cycle per minute if synthetic loads are used or if a sufficient number of ban
43、ks of lamps controlled by a commutator are employed so that each bank will cool for at least 59 seconds between successive applications. f Other than as noted in note a, the test cycle is to be as indicated in Table 46.2. g For a magnetic relay intended to turn a television receiver on and off, and
44、marked in accordance with 63.22, the number of test cycles is to be 25,000. h Load is a noninductive resistive load. i 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 required by the
45、end product standard. j The load is to consist of commercially available capacitors. The available test current at the test terminals shall not be less than 3000A or the marked short circuit rating of the capacitors, whichever is greater. The available current capacity is able to be determined by an
46、alytical evaluation. k Devices rated 120 and 277 VAC, intended to control electronic fl uorescent ballast loads up to 16 amps of steady state current shall be endurance tested using the load in accordance with Section 61C. Alternately, they may be tested on the specifi c model electronic ballast(s)
47、they are intended to control and marked according to 63.7.1. 50.1.3 A short circuit test is to be conducted on: a) A motor control device that is rated more than 1 hp (746 W) at voltages greater than 300 V or more than 2 hp (1492 W) at all voltages; b) A starter; c) An overload relay; d) Industrial
48、control equipment incorporating an overload relay; and e) Combination motor controllers; and f) Bus bar systems. Exception:Short circuit tests on a motor control device rated more than 1 horsepower (746 W) at voltages greater than 300 V or more than 2 horsepower (1492 W output) at all voltages and m
49、arked for use only with specifi c overload relays are able to be performed with the motor control device installed as part of a starter. A marking shall be provided as specifi ed in 63.30. (NEW 51.1.2.3 or not more than 15 amperes at 51 150 volts, 10 amperes at 151 300 volts, or 5 amperes at 301 600 volts. 2)Which is the type described above which con