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Masterpact™ NT/NW Circuit Breakers Masterpact™ Power Circuit Breakers
Class 613 / Refer to Catalog 0613CT0001
Masterpact NT and NW Circuit Breakers
Masterpact NT Masterpact NW
The Masterpact NT and NW universal power circuit breakers offer 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.
•
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 7.152: Masterpact NW Circuit Breaker Ratings
Standard
Frame Rating
Interrupting Code
ANSI C37 Certified/UL 1066 Listed UL 489 Listed
800–1600 A 2000 A
3200/4000 A [14]
4000/5000 A 800/1200/1600/2000 A
2500/
3000 A
4000/
5000/
6000 A
N1 H1 H2 H3
L1
[15]
L1F
[15]
H1 H2 H3
L1
[15]
L1F
[15]
H1 H2 H3
L1
[15]
H2 H3
L1
[15]
N H
L
[15]
LF
[15]
H
L
[15]
H
L
[15]
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
42
[16]
65
[16]
30
[16]
[17]
22 65 65 85 100
Built-in Instantaneous
Override
(kA RMS ±10%)
35
[18]
35
[18]
35
[18]
85
35
[18]
24 — — 85 35 24 — — 85 117 — — 117 40 40
35
[16]
[17]
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
25
[19]
22 40 40 40 40
Tested to show arc flash
hazard risk category as
referenced by NFPA70E
— — — — — Yes — — — — Yes — — — — — — — — — — Yes — — — —
Breaking time 25–30 ms with no intentional delay (9 ms for L1, L1F, L and LF)
Closing time
70 ms
Sensor Rating
100–250 A
400–800 A
800–1600 A
1000–2000 A 1600–3200 A
2000–4000 A
2500–5000 A
100–250 A
400–800 A
600–1200 A
800–1600 A
1000–2000 A
1200–
2500 A
1600–
3000 A
2000–
4000 A
2500–
5000 A
3000–
6000 A
Endurance
Rating (C/O
Cycles)
With No
Mainte-
nance
Mechanical
12,500 10,000 10,000
5k
5,000
12,500 [20]
10,000 5,000
Electrical 2800
1,000 1,000
1k
1,000
2800 [20]
1,000 1,000
7
MINIATURE AND MOLDED CASE
CIRCUIT BREAKERS
[14] 4000 A standard width circuit breaker is not available in L1 interrupting rating code or drawout construction (fixed mounting only).
[15] Drawout mounted only.
[16] 24 kA RMS for 800 A circuit breaker frame with 100 A or 250 A sensor.
[17] 65 kA RMS for 2000 A.
[18] None except 24 kA RMS for 800 A circuit breaker frame with 100 A or 250 A sensor.
[19] 40 kA RMS for 2000 A.
[20] The endurance rating for 2000 A, N/H/L/LF is 10,000 for mechanical and 1000 for electrical.
9/13/2019