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Masterpact™ NT and NW Universal Power Circuit Breakers
Selection
164
05/2014
Y-Frame Circuit Breaker Selection
Table 79: IEC 60947-3 Rated, Non-Automatic Switch
Frame Rating
Model
Number
Interrupting Rating
1
1
When used in conjunction with an overcurrent relay, circuit breaker, or fuse.
Short-Time (0.5 s)
Rating
240 V 440 V 690 V 1150 V
800 A
NW08NA 42 kA 42 kA 42 kA — 42 kA
NW08HA 50 kA 50 kA 50 kA — 50 kA
NW08HA10
2
2
Not available for fixed-mounted circuit breakers.
— — — 50 kA 50 kA
1000 A
NW10NA 42 kA 42 kA 42 kA — 42 kA
NW10HA 50 kA 50 kA 50 kA — 50 kA
NW10HA10
2
— — — 50 kA 50 kA
1250 A
NW12NA 42 kA 42 kA 42 kA — 42 kA
NW12HA 50 kA 50 kA 50 kA — 50 kA
NW12HA10
2
— — — 50 kA 50 kA
1600 A
NW16NA 42 kA 42 kA 42 kA — 42 kA
NW16HA 50 kA 50 kA 50 kA — 50 kA
NW16HA10
2
— — — 50 kA 50 kA
2000 A
NW20HA 50 kA 50 kA 50 kA — 50 kA
NW20HA10
2
— — — 50 kA 50 kA
2500 A
NW25HA 50 kA 50 kA 50 kA — 50 kA
NW25HA10
2
— — — 50 kA 50 kA
3200 A
NW32HA 50 kA 50 kA 50 kA — 50 kA
NW32HA10
2
— — — 50 kA 50 kA
4000 A
NW40HA 50 kA 50 kA 50 kA — 50 kA
NW40HA10
2
— — — 50 kA 50 kA
Table 80: ANSI C37 Certified/UL 1066 Listed Y-Frame Circuit Breakers
Frame Rating
Model
Number
Interrupting Rating (kA)
Sensor Plug Rating (A)
254 V 508 V 635 V
3200 A to 4000 A
NW32L1
1
1
Not available for fixed-mounted or 4P drawout circuit breakers.
200 kA 200 kA 130 kA 2000 A, 2500 A, 3000 A, 3200 A
NW40H2 85 kA 85 kA 85 kA 2000 A, 2500 A, 3000 A, 3200 A, 4000 A
NW40H3 100 kA 100 kA 85 kA 2000 A, 2500 A, 3000 A, 3200 A, 4000 A
NW40L1
1
200 kA 200 kA 130 kA 2000 A, 2500 A, 3000 A, 3200 A, 4000 A
5000 A
NW50H2 85 kA 85 kA 85 kA 2500 A, 3000 A, 3200 A, 4000 A, 5000 A
NW50H3 100 kA 100 kA 85 kA 2500 A, 3000 A, 3200 A, 4000 A, 5000 A
NW50L1
1
200 kA 200 kA 130 kA 2500 A, 3000 A, 3200 A, 4000 A, 5000 A
Table 81: UL 489 Listed Y-Frame Circuit Breakers
Frame Rating
Model
Number
Interrupting Rating
Sensor Plug Rating
240 V 480 V 600 V
4000 A
NW40H 100 kA 100 kA 85 kA 2000 A, 2500 A, 3000 A, 4000 A
NW40L
1
1
Not available for fixed-mounted or 4P drawout circuit breakers.
200 kA 150 kA 100 kA 2000 A, 2500 A, 3000 A, 4000 A
5000 A
NW50H 100 kA 100 kA 85 kA 2500 A, 3000 A, 4000 A, 5000 A
NW50L
1
200 kA 150 kA 100 kA 2500 A, 3000 A, 4000 A, 5000 A
6000 A
NW60H 100 kA 100 kA 85 kA 3000 A, 4000 A, 5000 A, 6000 A
NW60L
1
200 kA 150 kA 100 kA 3000 A, 4000 A, 5000 A, 6000 A