1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 21, 20161UL 489GOutline of Investigation for Molded-Case Circuit Breakers, Molded-CaseSwitches, and Circuit-Breaker Enclosures, 650 1000 Volts AC and 650 1500 Volts DCIssue No. 1December
2、 21, 2016Summary of TopicsThis First issue of the Outline of Investigation for Molded-Case CircuitBreakers, Molded-Case Switches, and Circuit-Breaker Enclosures, 650 1000 Volts AC and 650 1500 Volts DC, covers molded-case circuitbreakers, molded-case switches, and circuit-breaker enclosures, rated a
3、t650 1000 volts AC and 650 1500 volts DC, 6000 amperes or less.ULs Outlines of Investigation are copyrighted by UL LLC. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights reg
4、ardingthose Outlines of Investigation shall remain the sole and exclusive property of ULLLC.COPYRIGHT 2016 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 21, 2016UL 489G2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZE
5、D FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTS1 Scope .46 Construction 47 Tests 57.1.3 Overload Test 57.1.5 Endurance Test 77.1.7 Interrupting Test .97.1.9 Dielectric Voltage-Withstand Test 107.1.11 High Available Fault Current Test Sequence .107.2.3 Interrupting and Le
6、t-Through Measurement Test .118 Ratings .1214 Construction .1219 Performance .13DECEMBER 21, 2016 UL 489G 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL1 Scope1.1 These requirements cover molded-case circuit breakers, molded-case switches,
7、and circuit-breakerenclosures, rated at 650 1000 volts AC and 650 1500 volts DC, 6000 amperes or less. This Outlineis intended to be used with the Standard for Molded-Case Circuit Breakers, Molded-Case Switches, andCircuit-Breaker Enclosures, UL 489. Only the sections that are modified from UL 489 a
8、re included in thisOutline, all other Sections apply as written in UL 489.6 ConstructionSection 6 of UL 489 is modified as follows:Table 6.1.6.1.1Minimum spacings in millimeterse,f,gAt terminals Other than at terminalsBetween terminalsofopposite polarityBetween terminalsand anygrounded metalaBetween
9、uninsulatedlive parts ofopposite polaritybBetween uninsulatedlive parts and anyground metalaABCDcEdVoltagebetweenpartsThroughairOversurfaceThroughairOversurfaceThroughairOversurfaceThroughairOversurfaceThroughairOversurface0 130 12.7 19.1 12.7 12.7 6.4 9.5 12.7 12.7 6.4 9.5131 30019.1 31.8 12.7 12.7
10、 6.4 9.5 12.7 12.7 6.4 9.5301 60025.4 50.8 12.7 25.4 9.5 12.7 12.7 25.4 9.5 12.7650 100025.4 50.8 12.7 25.4 9.5 12.7 12.7 25.4 9.5 12.7aThe spacing to the enclosure or mounting means shall be permitted to be reduced if an acceptable liner of insulating material,not less than 0.8 mm (1/32 inch) thick
11、, is used to provide the required spacing through air.bNot applicable for spacings between parts of opposite polarity on a control circuit printed wiring board with conformal coating.See Table 6.1.6.2.1 and Printed Circuit and Wiring Board Assembly, 6.1.6.2.cIf indentation or deformation of the over
12、all enclosure or circuit breaker mounting means could reduce spacings to less thanthose indicated in Column E.dIf indentation or deformation of the overall enclosure or circuit breaker mounting means would not affect spacings.eAn isolated dead metal part (such as a screw head or a washer) interposed
13、 between uninsulated live parts of opposite polarityor between an uninsulated live part and a grounded dead metal part is considered to reduce the spacing by an amount equal tothe dimension of the interposed part along the path of measurement.fIn measuring an over surface spacing, any slot, groove,
14、or the like, 0.33 mm (0.013 inch) wide or less in the contour ofinsulating material shall be disregarded.gIn measuring spacings, an air spacing of 0.33 mm (0.013 inch) or less between a live part and an insulating surface shall bedisregarded, and the live part considered in contact with the insulati
15、ng material.mm 0.8 6.4 9.5 12.7 19.1 25.4 31.8 50.8inches 1/32 1/4 3/8 1/2 3/4 1 1-1/4 2DECEMBER 21, 2016UL 489G4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 6.1.6.2.1Minimum opposite polarity spacings on printed-wiringassemblies with
16、 conformal coatingsaMinimum spacingsVoltage between parts Power available mm Inch0 600 Unlimited 0.8 (1/32)650 1000 Unlimited 1.6 (1/16)1001 1500cUnlimited 2.4 (1/8)0 30 Limitedb0.4 (1/64)aMinimum spacing between live parts of opposite polarity. Spacing between live parts and dead metal shall comply
17、 withTable 6.1.6.1.1.bSee 6.1.6.3.1 and 6.1.6.3.2.cVolts dc.7 TestsSection 7 of UL 489 is modified as follows:7.1.3 Overload TestThis is generated text for figtxt.DECEMBER 21, 2016 UL 489G 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigur
18、e 7.1.3.1Overload test connection diagramsA 1PoleB,C1-PoleTested in Pairs (also represents 2-Pole independent-trip type circuit breaker)D 2-Pole Common-Trip slant (120/240, 125/250 V) RatingE 2-Pole Common-Trip Rating other than DF3-PoleG 3-Pole wye connected system ratings such as 1000Y/577 VH 2-Po
19、le Common-Trip for 3-Phase RatingI 4-Pole wye connected system ratings such as 1000Y/577 VN NeutralZ Load Impedancef30Aground Fuse EnclosureDECEMBER 21, 2016UL 489G6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.1.5 Endurance TestThis is ge
20、nerated text for figtxt.DECEMBER 21, 2016 UL 489G 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFigure 7.1.5.1Endurance test connection diagramsA 1PoleB1-PoleTested in Pairs (also represents 2-Pole independent-trip type circuit breaker)C 2-
21、Pole Common-Trip slant (120/240, 125/250 V) RatingD 2-Pole Common-Trip Rating other than CE3-PoleF 3-Pole wye connected system ratings such as 1000Y/577 VG 2-Pole Common-Trip for 3-Phase RatingH 4-Pole wye connected system ratings such as 1000Y/577 VN NeutralZ Load Impedancef30Aground Fuse Enclosure
22、DECEMBER 21, 2016UL 489G8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.1.7 Interrupting TestTable 7.1.7.1Interrupting test operationsPoles FrameratingCircuit breakerAC voltage ratingLetters indicate diagram in Figure 7.1.7.1 Totalnumber of
23、operationsOperations on each pole Common operationsOCOOOCOO1 All 650, 690, or 700 1000 A A A 32AlAny delta connected systemratings E E D 52 0 1200 AAny wye connected systemratings L L C 53 0 1200 AAny delta connected systemratings G G F 73 1200 UpAny delta connected systemratings G G F 73AlAny wye c
24、onnected systemratings K K I 74AlAny wye connected systemratings K K M 7Table 7.1.7.3Available current in test circuitsRMS symmetrical or DC amperes1 pole 2 pole 3 poleFrame rating IndividualaCommon IndividualaCommon100 A maximum, 251 1500 V 10,000 10,000 10,000 8,660b,c,d10,000aAt the option of the
25、 manufacturer, the adjustable response of a circuit breaker that incorporates a delayed-tripping elementmay be adjusted to less than the maximum position for the individual pole tests.bThis value is the current available when using two legs of the 3-phase circuit indicated under Common.cFor dc ratin
26、gs, the current indicated under Common shall be used for individual pole operation.dFor a wye connected system rating and 3-pole circuit breakers marked in accordance with 9.1.1.24, the current indicated for2pole under “Individual” shall be used.DECEMBER 21, 2016 UL 489G 9UL COPYRIGHTED MATERIAL NOT
27、 AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 7.1.7.4Available current in test circuitaRMS symmetrical or DC amperes1-pole 2-, 3-, and 4-poleFrame rating Common100 A maximum, 251 1500 Vmaximum 3000 3000aSequence of operations shall be O-t-CO, where t is a minimu
28、m of 2 minutes and a maximum of 1 hour.7.1.7.16 Each circuit breaker shall be subjected to all the operations of the interrupting test, withoutreplacement of any lead during the test. All leads shall consist of Type TW, TW75, RW75, THW, or THWNcopper wires of the size indicated in Table 6.1.4.2.1 co
29、rresponding to the current rating (In) and markingsof the circuit breaker, except as noted in 7.1.7.17, the leads for tests on circuit breakers rated both 15 Aor less and 650 V or more shall be permitted to be 12 AWG (3.3 mm2). For a circuit breaker rated 125 Aor less, the 60C (140F) wire shall be u
30、sed except as required by 7.1.7.17. A circuit breaker rated 1600A or more shall be permitted to be tested with copper bus bars having a cross-section not less thanindicated in Table 7.1.4.1.3. Line terminal leads shall be not more than 1.219 m (4 feet) in length. Loadterminal leads shall be not more
31、 than 254 mm (10 inches) in length per terminal for multipole operation,and not more than 1.219 m (4 feet) in length for single-pole operations. However, for 600 A frame sizeand larger, leads of any AWG size not more than 1.219 m (4 feet) in length and that were included in thecalibration circuit sh
32、all be permitted as load leads for multipole operation and as extension leads forsingle-pole operation. Leads shall be routed as described in 7.1.3.5.7.1.9 Dielectric Voltage-Withstand Test7.1.9.1 A circuit breaker shall be capable of withstanding for 1 minute without breakdown the applicationof a 4
33、8 62 Hz essentially sinusoidal potential of 1000 V plus twice the voltage that is to be appliedbetween the parts in question, when the breaker is connected in accordance with its maximum voltagerating:a) Between line and load terminals with the breaker open with the breaker in the tripped andoff pos
34、itions. The test voltages shall be based on the voltage rating of the circuit breaker. Thetest voltage for a circuit breaker rated for a wye connected system shall be based on thephase-to-phase voltage;b) Between terminals of opposite polarity with the breaker closed. The test voltages shall bebased
35、 on the voltage rating of the circuit breaker. The test voltage for a circuit breaker rated fora wye connected system shall be based on the phase-to-phase voltage; andc) Between live parts and the overall enclosure, as described in 7.1.1.25, with the breaker bothopen and closed. The test voltage for
36、 a circuit breaker rated for a wye connected system shallbe based on the phase-to-neutral voltage.7.1.11 High Available Fault Current Test Sequence7.1.11.4.1.14 The test enclosure shall be connected through a fuse as indicated in 7.1.1.27 to the linelead least likely to arc to the enclosure, or the
37、neutral, if the circuit breakers are rated for a wye connectedsystem. The connection shall be made to the load side of the limiting impedance by means of 10 AWG(5.3 mm2) copper wire not more than 1.829 m (6 feet) in length.DECEMBER 21, 2016UL 489G10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
38、REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.1.11.7.2 The test potential shall be twice the voltage rating at which the interrupting test was conductedbut not less than 150 percent of rated voltage. Also, see 7.1.9 for circuit breakers rated for a wyeconnected system.7.2.3 Interrupting an
39、d Let-Through Measurement TestTable 7.2.3.2Test leadsMannertestedAmpacity Ampere ratingrelative to frame orgroup within frameSize of copper test leadsa,bLine LoadcTestedwithleads100 Aand aboveMaximumMinimumRated wireRated wireRated wireRated wireLess than100 AMaximumMinimumRated wireRated wireeRated
40、 wiredRated wireeTestedunderbus barcondition100 A and less MaximumMinimum1 AWGf(42.4 mm2)Rated wire(2 and 3 pole)1 AWG(42.4 mm2)(1 pole)faRated wire refers to size as specified in Table 6.1.4.2.1. For a circuit breaker rated 100 A or less or that is not marked foruse with wire sizes of 1/0 or larger
41、, the 60C (140F) wire shall be used.bCircuit breakers of frame size rated 1600 A or more shall be permitted to be tested with bus bars of a size shown in Table7.1.4.1.3.cA copper bus bar may be substituted for the load leads if the ampacity is equal to or greater than the required leadampacity.dSee
42、7.2.3.14 and 7.2.3.15.eFor circuit breakers rated 15 A at 650 V or more: 12 AWG (3.3 mm2) wire shall be permitted instead of 14 AWG (2.1 mm2)wire.fSee 7.2.3.16.7.2.3.19 A metallic test enclosure shall be connected through a 30-A fuse to the line lead least likely toarc to the enclosure, or the neutr
43、al, if the circuit breakers are rated and tested for a wye connectedsystem. The connection shall be made to the load side of the limiting impedance by means of 10 AWG(5.3 mm2) copper wire no more than 1.829 m (6 feet) in length. The fuse shall be acceptable forbranch-circuit protection and have a vo
44、ltage rating not less than the circuit breaker being tested.DECEMBER 21, 2016 UL 489G 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8 RatingsSection 8 of UL 489 is modified as follows:8.2 A circuit breaker shall have one or more of the fol
45、lowing voltage ratings:a) DC: 650 to 1500 Vdc, in 50 V increments.b) AC: 650, 690, and 700 to 1000 Vac in 50 volt increments. In addition, any wye connectedsystem voltage with the above mentioned values is also acceptable.14 ConstructionSection 14 of UL 489 is modified as follows:Table 14.1.6.1Minim
46、um acceptable spacings in millimeters (inches)a,b,cLocation Potential involved in volts0 130 131 300 301 600 650 1000Between anyuninsulated livepart anduninsulated liveparts of oppositepolarity, uninsulatedgrounded partsother than theenclosure, orexposed metalpartsThrough air 3.2 (1/8) 6.4 (1/4) 9.5
47、 (3/8) 9.5 (3/8)Over surface 6.4 (1/4) 9.5 (3/8) 12.7 (1/2) 12.7 (1/2)aAn isolated dead metal part (such as a screw head or a washer) interposed between uninsulated live parts of opposite polarityor between an uninsulated live part and a grounded dead metal part is considered to reduce the spacing b
48、y an amount equal tothe dimension of the interposed part along the path of measurement.bIn measuring an over surface spacing, any slot, groove, or the like, 0.33 mm (0.013 inch) wide or less in the contour ofinsulating material shall be disregarded.cIn measuring spacings, an air spacing of 0.33 mm (
49、0.013 inch) or less between a live part and an insulating surface shall bedisregarded, and the live part considered in contact with the insulating material.DECEMBER 21, 2016UL 489G12UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL19 PerformanceSection 19 of UL 489 is modified as follows:19.7.3 A circuit breaker enclosure rated for a wye connected system and inten
