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Masterpact™ NT and NW Universal Power Circuit Breakers
Selection
162
05/2014
W-Frame Switch Selection
A
Table 73: ANSI C37 Certified/UL 1066 Listed, 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
254 V 508 V 635 V
800 A NW08HA 65 kA 65 kA 65 kA 65 kA
1600 A NW16HA 65 kA 65 kA 65 kA 65 kA
2000 A NW20HA 65 kA 65 kA 65 kA 65 kA
3200 A NW32HA 65 kA 65 kA 65 kA 65 kA
Table 74: ANSI C37 Certified/UL 1066 Listed, Drawout Automatic Switch
Frame Rating
(W-Frame)
Model
Number
Interrupting Rating
1
1
When used in conjunction with an overcurrent relay, circuit breaker, or fuse.
Short-Time (0.5 s)
Rating
254 V 508 V 635 V
800 A
NW08HF 100 kA 100 kA 85 kA 85 kA
NW08HC
2
2
Not available in 4P.
200 kA 200 kA 130 kA 30 kA
1600 A
NW16HF 100 kA 100 kA 85 kA 85 kA
NW16HC
2
200 kA 200 kA 130 kA 30 kA
2000 A
NW20HF 100 kA 100 kA 85 kA 85 kA
NW20HC
2
200 kA 200 kA 130 kA 30 kA
3200 A NW32HF 100 kA 100 kA 85 kA 85 kA
Table 75: ANSI C37 Certified/UL 1066 Listed, Fixed Automatic Switch
Frame Rating
(W-Frame)
Model
Number
Interrupting Rating
1
1
When used in conjunction with an overcurrent relay, circuit breaker, or fuse.
Short-Time (0.5 s)
Rating
254 V 508 V 635 V
800 A NW08HF 100 kA 100 kA 85 kA 85 kA
1600 A NW16HF 100 kA 100 kA 85 kA 85 kA
2000 A NW20HF 100 kA 100 kA 85 kA 85 kA
3200 A NW32HF 100 kA 100 kA 85 kA 85 kA
Table 76: UL 489 Listed, Fixed Automatic Switch
Frame Rating
Model
Number
Withstand Rating
1
1
The withstand rating is the fault current (at rated voltage) that the switch will withstand without damage when protected by a circuit
breaker with an equal continuous current rating.
Instantaneous Override
240 V 480 V 600 V
800 A NW08HF 100 kA 100 kA 85 kA 40 kA
1200 A NW12HF 100 kA 100 kA 85 kA 40 kA
1600 A NW16HF 100 kA 100 kA 85 kA 40 kA
2000 A NW20HF 100 kA 100 kA 85 kA 40 kA
2500 A NW25HF 100 kA 100 kA 85 kA 65 kA
3000 A NW30HF 100 kA 100 kA 85 kA 65 kA
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