0614CT1701

Selecting Masterpact MTZ3 Circuit Breakers

Ratings for UL489 Masterpact MTZ3 Circuit Breakers

Frame Rating

4000/5000/6000 A

Number of Poles

3/4

Interrupting Rating Code

H

L

Interrupting Current (kAIR)

240 Vac 50/60 Hz

100

200

480 Vac 50/60 Hz

100

150

600 Vac 50/60 Hz

85

100

Short-Time Withstand Current (kA)

Vac 50/60 Hz, 0.5 s

85

100

Built-In Instantaneous Override (Peak kA ±10%)

170

170

Close and Latch Ratings (Peak kA)

Vac 50/60 Hz

90

90

Tested to show arc flash hazard risk category (NFPA70E)

Breaking Time

25 to 30 ms (with no intentional delay)
9 ms for L

Closing Time

70 ms

Sensor Rating

2000–4000 A
2500–5000 A
3000–6000 A

Endurance Rating (C/O Cycles)
(with no maintenance)

Mechanical

5000

5000

Electrical

1000

Ratings for ANSI C37 Certified Masterpact MTZ3 Circuit Breakers

Frame Rating

 

Interrupting Rating Code

H2

H3

L1* *

Interrupting Current (kAIR) (50/60 Hz)

254 Vac

85

100

200

508 Vac

85

100

200

635 Vac

85

85

130

Short-Time Withstand Current (kA) (50/60 Hz)

Vac, 0.5 s

85

85

100

Built In Instantaneous Override (Peak kA ±10%)

270

Close and Latch Ratings (Peak kA) (50/60 Hz)

Vac

170

170

90

Tested to show arc flash hazard risk category (NFPA70E)

Breaking Time

25 to 30 ms (with no intentional delay)
9 ms for L1

Closing Time

70 ms

Sensor Rating

2000–4000 A
2500–5000 A
3000–6000 A

Endurance Rating (C/O Cycles) (with no maintenance)

Mechanical

5000

Electrical

1000

Ratings for IEC60947–2 Rated Masterpact MTZ3 Circuit Breakers

Frame Rating

4000B/5000/6300 A

Interrupting Rating Code

H1

H2

Ultimate Breaking Capacity
(kA) 50/60 Hz

Icu

220/415 Vac

100

150

440 Vac

100

150

525 Vac

100

130

690 Vac

100

100

1150 Vac

Service Breaking Capacity

Ics

%Icu

100%

100%

Short-Time Withstand Current (kA)

Icw

Vac 50/60 Hz, 1 s

100

100

Vac 50/60 Hz, 3 s

100

100

Built-In Instantaneous Override (Peak kA ±10%)

117

Rated making Current
(Peak kA) 50/60 Hz

Icm

220/415 Vac

220

330

440 Vac

220

330

525 Vac

187

286

690 Vac

187

220

1150 Vac

Breaking Time

25 ms

Closing Time

ms

< 80

Sensor Rating

2000–4000 A
2500–5000 A
3000–6000 A

Endurance Rating (with no maint.)
(C/O Cycles x 1000)

Mechanical

5

Electrical 440 V

1.5

1.5

Electrical 1150 V

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