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Masterpact™ NT and NW Universal Power Circuit Breakers
Masterpact™ Circuit Breakers
14
05/2014
Table 4: Ratings for UL 489 Listed Masterpact NW Circuit Breakers
Frame Rating 800/1200/1600/2000 A 2500/3000 A 4000/5000/6000 A
Interrupting Rating Code N H L LF H L H L
Interrupting Current
(kAIR)
240 Vac 50/60 Hz
480 Vac 50/60 Hz
600 Vac 50/60 Hz
65
65
50
100
100
85
200
150
100
200
150
100
100
100
85
200
150
100
100
100
85
200
150
100
Short-Time Withstand Current (kA) Vac 50/60 Hz, 0.5 s 42
1
1
24 kA for 800 A circuit breaker frame with 100 A or 250 A sensor.
65
1
30
1, 2
2
65 kA for 2000 A.
22 65 65 85 100
Built-In Instantaneous Override
(Peak kA ±10%)
90 90 80
3, 4
3
55 kA for 800 A circuit breaker frame with 100 A or 250 A sensor.
4
150 kA for 200 A sensor.
55 150 150 170 170
Close and Latch Ratings (Peak kA) Vac 50/60 Hz 90 90 55
5
5
90 kA for 2000 A.
50 90 90 90 90
Tested to show arc flash hazard risk category
as referenced by NFPA70E
———Yes——— —
Breaking Time 25 to 30 ms (with no intentional delay) 9 ms for L and LF
Closing Time 70 ms
Sensor Rating
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 maintenance)
Mechanical 12,500
6
6
The endurance rating for 2000 A, N/H/L/LF is 10,000 for mechanical and 1000 for electrical.
12,500
6
12,500
6
12,500
6
10,000 10,000 5000 5000
Electrical 2800
6
2800
6
2800
6
2800
6
1000 1000 1000 1000
Table 5: Ratings for UL 489 Listed Masterpact NW Automatic Switches
Frame Rating 800 A 1200 A 1600 A 2000 A 2500 A 3000 A 4000 A 5000 A 6000 A
Withstand Rating Code HF HB HF HB HF HB HF HB HF HB HF HB HF HB HF HB HF HB
Withstand Ratings
1
(kA) Vac, 50/60 Hz
240 100 200 100 200 100 200 100 200 100 200 100 200 100 200 100 200 100 200
480 100 150 100 150 100 150 100 150 100 150 100 150 100 150 100 150 100 150
600 85 100 85 100 85 100 85 100 85 100 85 100 85 100 85 100 85 100
Instantaneous Override (Peak kA) 90 80 90 50 90 80 90 80 150 150 150 150 170 170 170 170 170 170
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.
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