Insulated Case Circuit Breakers

Class 600, 800

Masterpact NT, NW Molded Case Circuit Breakers

 

Masterpact 1200 A

Masterpact 6000 A

 

Circuit Breaker Type

NT-N

NT-H

NT-L1

NT-L

NT-LF [1]

NW-N

NW-H

NW-L

NW-LF [1]

NW-H

NW-L

NW-H

NW-L

Number of Poles

3  , 4

3, 4

3

3 

3  

3 , 4

3, 4

3

3

3  , 4

3

3  , 4

3

Current Range

100–1200

100–1200

100–1200

100–1200

100–1200

100–2000

100–2000

100–2000

100–2000

640–3000

640–3000

1200–6000

1200–6000

Interrupting Ratings

UL/CSA/NOM

Rating

(kA RMS)

(50/60 Hz)

240 Vac

50

65

100

200

200

65

100

200

200

100

200

100

200

480Y/277 Vac

50

50

65

100

100

65

100

150

150

100

150

100

150

480 Vac

50

50

65

100

100

65

100

150

150

100

150

100

150

600Y/347 Vac

35

50

50

85

100

100

85

100

85

100

600 Vac

35

50

50

85

100

100

85

100

85

100

DC Ratings

250 Vdc

500 Vdc

IEC [2]

(kA RMS) Icu/Ics

240 Vac

415 Vac

Special Ratings

 

CCC

 

Fed. Specs W-C-375B/GEN

 

HACR (2P, 3P)

Connections/Terminations

 

Unit Mount

X

X

X

X

X

X

X

X

X

X

X

X

X

 

I-Line™

 

Rear Connection

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Drawout

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Optional Lugs

Accessories and Modifications

 

Shunt Trip

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Undervoltage Trip

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Auxiliary Switches

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Alarm Switch

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Motor Operator

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Handle Operators

 

Mechanical Interlocks

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Padlock Attachment

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Cylinder Lock

 

Optional GF Protection

X

X

X

X

X

X

X

X

X

X

X

X

X

Trip System Type

 

Thermal-magnetic

 

Instantaneous-only (MCP)

 

Molded Case Switch (Automatic)

X

X

X

X

X

X

X

X

X

X

X

X

X

 

Electronic

X

X

X

X

X

X

X

X

X

X

X

X

X

Enclosures

 

General Purpose (NEMA 1)

 

Raintight (NEMA 3R)

 

Dust-tight (NEMA 12)

 

Watertight (NEMA 4, 4X, 5)

 

Explosion Proof (NEMA 7, 9)

Dimensions
(3P Unit Mount)

in. (mm)

Height

12.67 (322)

17.28 (439)

17.28 (439)

17.28 (439)

Width

11.25 (286)

17.74 (450)

17.74 (450)

30.94 (786)

Depth

13.00 (331)

18.38 (467)

18.38 (467)

18.38 (467)

Pages

Full-Featured Performance and Catalog 0613CT0001

Full-Featured Performance and Catalog 0613CT0001

note

All circuit breakers on this chart are UL Listed and CSA Certified unless otherwise noted.

Footnotes

  1. Tested to show arc flash hazard risk category as reference by NFPA70E.
  2. See Catalog 0613CT0001 for additional ratings and other information.

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