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1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Subject 489 September 25, 2007 SUMMARY OF TOPICS The following is being proposed for preliminary review and comment only: 1. For Preliminary Review Only: Revision to Ampacity Requirements to Align with NEC Section 110.14(C)(1) 2. For Prel
2、iminary Review Only: Revision to Clarify that Steel is an Acceptable Metal for Use as a Current-Carrying Part 3. For Preliminary Review Only: Reconciling Type B Test Conditions 4. For Preliminary Review Only: Revision of the Ignition-Protected Devices Test Requirements to Refer to UL 1500, the Stand
3、ard for Ignition-Protection Test for Marine Products 5. For Preliminary Review Only: Clarifi cation of the Performance Requirements of the Interrupting Test 6. For Preliminary Review Only: Revision to the Overload Test Operation Requirements 7. For Preliminary Review Only: Revision to the Voltage Ra
4、tings of Circuit Breakers and Circuit Breaker Accessories 8. For Preliminary Review Only: Deletion of Requirements for HACR Circuit Breakers 9. For Preliminary Review Only: Revision to Requirements for Single-Pole 1200-A Circuit Breakers 10. For Preliminary Review Only: Clarifi cation of the 135-Per
5、cent Calibration Test 11. For Preliminary Review Only: Revision to the Requirements for Naval-Use Circuit Breakers to Allow a 50 C Marked Rating 12. For Preliminary Review Only: Inclusion of Requirements for Lock-On Devices 13. For Preliminary Review Only: Revision of Requirements for Non-Time Delay
6、 Circuit Breakers 14. For Preliminary Review Only: Clarifi cation of Flammability Test Requirements to No Longer Reference Outdated CSA Standard COMMENTS DUE: OCTOBER 9, 2007 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Spiller
7、, Kevin Not for Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION These proposals are for review and comment only (no ballot at this time). Many of these proposals were developed after p
8、reliminary discussions at the March 2006 Meeting of the 489 STP. While discussion of these topics was considered to satisfy ULs preliminary review process, STP members have not had the opportunity to provide comment on the actual text of the majority of these proposals. In addition, UL 489 is a trin
9、ational standard and any revisions must be coordinated with CSA and ANCE. CSA and ANCE are now in the midst of conducting their respective preliminary review processes. Therefore, while the other SDOs complete their preliminary processes, UL feels it would be prudent to conduct a short, formal preli
10、minary review of these proposals. This would make the best use of time and facilitate the ballot process that will follow. Please note that comments on a preliminary review document will not receive a response from the proposal author through CSDS. Instead, the proposal author will be asked to revie
11、w the comments and adjust the proposals and/or supporting rationale as the author determines to be appropriate. The preliminary review process is an informal mechanism that provides authors with the opportunity to refi ne their proposals before they advance to the next stage in ULs standards develop
12、ment process. In some cases, the author of the proposals may choose to discontinue them. In this case, the author need not do anything after preliminary review has ended. Normally, the next step in the process is the more formal STP ballot and stakeholder review process. Only comments posted during
13、the STP ballot and stakeholder review process will be provided with a response in CSDS. For your convenience in review, proposed additions to existing requirements are shown underlined and proposed deletions are shown lined-out. 1. Revision to Ampacity Requirements to Align with NEC Section 110.14(C
14、)(1) RATIONALE Proposal submitted by: John Young, Siemens Energy at 277, 347, 480, or 600 V; No. 12 AWG (3.3 mm2) wire shall be permitted to be used instead of No. 14 AWG (2.1 mm2) wire. f See 7.1.11.3.1.11 and 7.1.11.3.1.12. Table 7.2.3.2 Test leads Manner tested AmpacityAmpere rating relative to f
15、rame or group within frame Size of copper test leadsa,b LineLoadc Tested with leads 100 A and above Maximum Minimum Rated wire Rated wire Rated wire Rated wire Less than 100 A Maximum Minimum Rated wire Rated wiree Rated wired Rated wiree Tested under bus bar condition 100 A and lessMaximum Minimum
16、No. 1 AWGf (42.4 mm2) Rated wire (2 and 3 pole) No. 1 AWG (42.4 mm2) (1 pole)f a Rated wire refers to size as specifi ed in Table 6.1.4.2.1. For a circuit breaker rated 125 100 A or less or that is not marked for use with wire sizes of 1/0 or larger, the 60C (140F) wire shall be used. b Circuit brea
17、kers of frame size rated 1600 A or more shall be permitted to be tested with bus bars of a size shown in Table 7.1.4.1.3. c A copper bus bar may be substituted for the load leads if the ampacity is equal to or greater than the required lead ampacity. d See 7.2.3.14 and 7.2.3.15. e For circuit breake
18、rs rated 15 A; at 277, 347, 480, or 600 V; No. 12 AWG (3.3 mm2) wire shall be permitted instead of No. 14 AWG (2.1 mm2) wire. f See 7.2.3.16 SEPTEMBER 25, 2007SUBJECT 489-4- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Spiller,
19、 Kevin Not for Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 9.1 Location of markings circuit breaker (Table abbreviated for ease of review) Clause numbersSubjectLocation categ
20、oriesa (See notes) General 9.1.1.1Location 9.1.1.2Type designationB 9.1.1.2Manufacturers nameB 9.1.1.2Voltage ratingB 9.1.1.2FrequencyB 9.1.1.3Durability b) Inability of a multipole common-trip circuit breaker to open all poles during the interrupting test; c) Breakage of or holes in the circuit bre
21、aker case. See 7.1.11.6.4; d) Welding of contacts; e)Ejection of wire from the wire connector or burn off of leads during the interrupting test; f)Inability of more than one pole of a multipole circuit breaker to trip during the trip-out test; g)Ground fuse clearing; SEPTEMBER 25, 2007SUBJECT 489-8-
22、 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Spiller, Kevin Not for Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIB
23、UTION h)Dielectric voltage-withstand test breakdown; i) Inability of a multi-pole circuit breaker that includes a common - trip element to open all poles upon the tripping of any pole being tested during the trip-out test; j)Circuit breaker handle remains in the “on” position after the test circuit
24、has been cleared and all poles have opened; j) (k) Other types of similar results. 6. Revision to the Overload Test Operation Requirements RATIONALE Proposal submitted by: John Kovacik, UL It has come to ULs attention that Table 7.1.3.1 does not specify the overload test operation requirements for a
25、 250 amp frame size circuit breaker. Current practice is to use the requirements specifi ed for a 400 amp frame size for a 250 amp frame size circuit breaker. In lieu of adding an entry to Table 7.1.3.1 for the 250 amp frame size circuit breaker, it is recommended to revise the title of the fi rst c
26、olumn of the Table to Maximum frame size in Amperes. This would allow the Table to cover the 250 amp frame size circuit breaker as well as any other frame size currently not specifi ed in the Table. The revision would also make the title of the fi rst column consistent with the title of the fi rst c
27、olumn of Table 7.1.5.1 covering endurance test operation requirements. UL therefore proposes to revise Table 7.1.3.1 accordingly. PROPOSAL Table 7.1.3.1 Overload test operationsa Maximum fFrame size in Amperes Number of operationsNumber of cycles of operation per minute Circuit breakersSwitches Clos
28、e and open manuallyb,c,d Close manually, open automatically 503515506 1003515506 12550ee505 15050ee505 20050505 22550505 40050504f 60050504f 80050501f SEPTEMBER 25, 2007SUBJECT 489-9- Table 7.1.3.1 Continued on Next Page Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULL
29、icensee=IHS Employees/1111111001, User=Spiller, Kevin Not for Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Table 7.1.3.1 Continued Maximum fFrame size in Amperes Number of operation
30、sNumber of cycles of operation per minute Circuit breakersSwitches Close and open manuallyb,c,d Close manually, open automatically 120050501f 160050501f 200025251f 250025251f 300028g28g1g 400028g28g1g 500028g28g1g 600028g28g1g a The operations may be performed by a machine simulating manual operatio
31、n. b If the test sample trips during manual operation, it is still considered as a manual operation. c At the option of the manufacturer, the adjustable instantaneous response of a circuit breaker rated 400 A or more may be adjusted to less than the maximum position. d The minimum closed time shall
32、be one cycle, unless the sample trips. e In the case of a multipole breaker without a common trip, and rated at more than 100 A, 35 cycles of operation shall be made manually and 15 automatically as specifi ed in 7.1.3.14. f Operation may be conducted in groups of 5, with 15 minutes maximum between
33、groups. g Three operations at 600 percent of rating at the rate of 1 cycle per minute, followed by 25 operations at 200 percent of rating at the rate of 1 cycle per minute (may be conducted in groups of 5 with 15 minutes maximum between groups). 7. Revision to the Voltage Ratings of Circuit Breakers
34、 and Circuit Breaker Accessories RATIONALE Proposal submitted by: John Kovacik, UL UL has received numerous requests to List circuit breakers and circuit breaker accessories having voltage ratings not currently allowed by UL 489. The standard needs to be revised to provide more fl exibility than is
35、currently allowed. The deletion of paragraph 16.2 which specifi es the acceptable voltage ratings for accessories would provide such fl exibility for circuit breaker accessories. The rationale for allowing any voltage rating for accessories is they may be connected to a myriad of different sources o
36、f supply which are independent of the source of supply to which the circuit breaker is connected. Circuit breakers are limited to connection to the available sources provided by a utility or separately derived source of power. Therefore the circuit breaker voltage should be limited to only those rat
37、ings of available sources. It was noted that current 8.2 does not contain all of the available ratings and should be revised to include additional ratings. UL therefore proposes to delete 16.2 and revise 8.2 accordingly. In concert with the revision to 8.2, it is proposed to revise Table 7.1.7.1 to
38、recognize the additional AC voltage ratings in the requirements for the interrupting test. Other paragraphs also require revision to include the 208Y/120 V rating in the test and marking requirements. SEPTEMBER 25, 2007SUBJECT 489-10- Copyright Underwriters Laboratories Inc. Provided by IHS under li
39、cense with ULLicensee=IHS Employees/1111111001, User=Spiller, Kevin Not for Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION PROPOSAL 16.2 2 An accessory for a circuit breaker or switch
40、 shall have one or more of the following voltage ratings 60, 125, 125/250, 160, 250, 500, and 600 V for dc; and 120, 127, 120/240, 220, 240, 254, 277, 347, 440, 480Y/277, 480, 600Y/347, and 600 V for ac. 8.2 A circuit breaker shall have one or more of the following voltage ratings 24, 48, 60, 65, 80
41、, 125, 125/250, 160, 250, 500, and 600 V for dc; and 120, 127, 120/240, 208, 208Y/120, 240, 277, 347, 480Y/277, 480, 600Y/347, and 600 V for ac. Table 7.1.7.1 Interrupting test operationsa PolesFrame rating Circuit breaker AC voltage rating Letters indicate diagram in Figure 7.1.7.1Total number of o
42、perations Operations on each poleCommon operations OCOOOCOO 1All120, 127, 208, 240, 277, 347, 480, or 600 AAA3 1All120/240 (tested in pairs)BBB3 2All240, 480, or 600EED5 2All120/240CCC3 20 1200 A208Y/120, 480Y/277, or 600Y/347LLC5 2All1 3EEH5 30 1200 A240, 480, 600GGF7 31200 Up240, 480, 600GGF7 3All
43、120/240JJJ3 30 1200 A208Y/120, 480Y/277, 600Y/347KKI7 31201 Up208Y/120, 480Y/277, 600Y/347KKI7 a For the 125/250 V dc rating, the number of operations is the same as for the 120/240 V ac rating. For the 250 V dc rating, the number of operations is the same as for the 240 V ac rating. SEPTEMBER 25, 2
44、007SUBJECT 489-11- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Spiller, Kevin Not for Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT F
45、OR OUTSIDE DISTRIBUTION Figure 7.1.3.1 Overload test connection diagrams A 1Pole B, C 1-Pole Tested in Pairs (also represents 2-Pole independent-trip type circuit breaker) D 2-Pole Common-Trip slant (120/240, 125/250 V) Rating E 2-Pole Common-Trip Rating other than D F 3-Pole G 3-Pole 208Y/120 V, 48
46、0Y/277 V or 600Y/347 V Rating H 2-Pole Common-Trip for 3-Phase Rating N Neutral Z Load Impedance f 30 A ground Fuse Enclosure SEPTEMBER 25, 2007SUBJECT 489-12- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Spiller, Kevin Not for
47、 Resale, 10/07/2007 21:55:06 MDTNo reproduction or networking permitted without license from IHS -,-,- FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION Figure 7.1.5.1 Endurance test connection diagrams A 1Pole B 1-Pole Tested in Pairs (also represents 2-Pole independent-trip type circui
48、t breaker) C 2-Pole Common-Trip slant (120/240, 125/250 V) Rating D 2-Pole Common-Trip Rating other than C E 3-Pole F 3-Pole 208Y/120 V, 480Y/277 V or 600Y/347 V Rating G 2-Pole Common-Trip for 3-Phase Rating N Neutral Z Load Impedance f 30 A ground Fuse Enclosure SEPTEMBER 25, 2007SUBJECT 489-13- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Spiller, Kevin Not for Re