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Masterpact® Universal Power Circuit Breakers

Masterpact® NT/NW Circuit Breakers

Class 631 / Refer to Catalog 0613CT0001

The new Masterpact universal power circuit breaker offers a family of circuit protection products meeting the most common world standards, ANSI, UL and IEC. The basic design platform for each is common. The final result is UL, ANSI and IEC circuit breakers with the same basic external dimensions, features and accessories.

Full-Featured Performance

●	Complete product offering up to 200 k AIR without fuses

●	Circuit breakers tested to show arc flash hazard risk category as referenced by NFPA70E

●	800 A to 6000 A frames, fixed and draw-out

●	Rated for AC voltage systems through 600 V (635 V ANSI)

●	Short-time withstand ratings up to 100 kA

●	Cradle position indicator: connected, test and disconnected

●	Simple, visual contact wear indicators

●	Full complement of field-installable accessories common to all standards

●	Four interchangeable Micrologic trip units to choose from

●	Available PowerLogic® based power metering and monitoring capabilities

●	Available protective relay functions as defined by ANSI C37.2 and C37.90

The following charts show the Masterpact NW and NT ratings for ANSI and UL 489. See Pricing Guide 0613PL0001 and Catalog 0613CT0001.

 

Table 7.107:

Masterpact NW Circuit Breaker Ratings

Standard		ANSI C37 Certified/UL 1066 Listed																		UL 489 Listed
Frame Rating		800–1600 A						2000 A					3200 A				4000/5000 A			800/1200/1600/2000 A				2500/3000 A		4000/5000/6000 A
Interrupting Code		N1	H1	H2	H3	L1	L1F	H1	H2	H3	L1	L1F	H1	H2	H3	L1	H2	H3	L1	N	H	L	LF	H	L	H	L
Interrupting Current (kA RMS) 50/60 Hz	240 Vac	42	65	85	100	200	200	65	85	100	200	200	65	85	100	200	85	100	200	65	100	200	200	100	200	100	200
	480 Vac	42	65	85	100	200	200	65	85	100	200	200	65	85	100	200	85	100	200	65	100	150	150	100	150	100	150
	600 Vac	42	65	85	85	130	130	65	85	85	130	130	65	85	85	130	85	85	130	50	85	100	100	85	100	85	100
Short-time Withstand Current (kA RMS)		42	65	85	85	30	22	65	85	85	30	22	65	85	85	100	85	85	100	42a	65a	30ab	22	65	65	85	100
Built-in Instantaneous Override (kA RMS ±10%)		c	c	c	85	35c	24	—	—	85	35	24	—	—	85	117	—	—	117	40	40	35ab	24	65	65	75	75
Close and latch rating (kA RMS)		42	65	40	40	25	22	65	40	40	25	22	65	40	40	40	85	75	40	40	40	25d	22	40	40