0614CT1701

Selecting Masterpact MTZ1 Circuit Breakers

NOTE: Throughout this catalog, UL489 means UL489/CSA C22.2 No 5 and ANSI C37 means ANSI C37/CSA C22.2 No 268.

Ratings for UL489 Masterpact MTZ1 Circuit Breakers

Frame Rating

800 A

1200 A

1600 A*

Interrupting Rating Code

N

H

L1

L

LF

N

H

L1

L

LF

N

H

L1

L

Number of poles

3/4

Interrupting Current (kAIR)

240 Vac, 60 Hz

50

65

100

200

200

50

65

100

200

200

50

65

100

200

480 Vac, 60 Hz

50

50

65

100

100

50

50

65

100

100

50

50

65

100

600 Vac, 60 Hz

35

50

35

50

35

50

Short-Time Withstand Current Rating (kA)

Vac 60 Hz, 0.5 s

35

35

10

10

10

35

35

10

10

10

35

35

10

10

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

90

90

22

22

22

90

90

22

22

22

90

90

22

22

Close and Latch Ratings (Peak kA)

Vac 60 Hz

55

55

22

22

22

55

55

22

22

22

55

55

22

22

Tested to show arc flash hazard risk category as referenced by NFPA70E

Yes

Yes

Breaking Time

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

Closing Time

< 50 ms

Sensor Rating

400–800 A

600–1200 A

800–1600 A

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

Mechanical

12,500

Electrical

2,800

Ratings for ANSI C37 Certified Masterpact MTZ1 Circuit Breakers

Frame Rating

800 A

Interrupting Rating Code

N1

Number of Poles

3/4

Interrupting Current (kAIR)

254 Vac 60 Hz

42

508 Vac 60 Hz

42

635 Vac 60 Hz

Short-Time Withstand Current (kA)

Vac 60 Hz, 0.5 s

42

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

Close and Latch Ratings (Peak kA)

Vac 60 Hz

90

Tested to show arc flash hazard risk category as referenced by NFPA70E

Breaking Time (with no intentional time delay)

25 to 30 ms

Closing Time

< 50 ms

Sensor Rating

400 to 800 A

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

Mechanical

12,500

Electrical

2800

Ratings for IEC 60947-2 Rated Masterpact MTZ1 Circuit Breakers

Frame Rating

800/1000 A

1250/1600 A

Interrupting Rating Code

H1

H2

H3

L1

H1

H2

H3

Ultimate Breaking Capacity (kA)

Icu

220/415 Vac, 50/60 Hz

42

50

65

150

42

50

65

440 Vac, 50/60 Hz

42

50

65

130

42

50

65

525 Vac, 50/60 Hz

42

42

100

42

42

690 Vac, 50/60 Hz

42

42

25

42

42

1150 Vac, 50/60 Hz

Service Breaking Capacity (kA)

Ics

%Icu

100%

100%

75%

100%

100%

100%

75%

Short-Time Withstand Current (kA)

Icw

Vac 50/60 Hz, 1 s

42

42

50

10 x In

42

42

50

Built-In Instantaneous Override (kA ±10%)

90

110

10

110

Rated Making Capacity (Peak kA)

Icm

220/415 Vac, 50/60 Hz

88

105

145

330

88

105

145

440 Vac, 50/60 Hz

88

105

145

286

88

105

145

525 Vac, 50/60 Hz

88

88

200

88

88

690 Vac, 50/60 Hz

88

88

52

88

88

1000 Vac, 50/60 Hz

Breaking Time

ms

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

Closing Time

ms

50

Sensor Rating

400 to 800 A

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

Mechanical

12,500

12,500

10,000

12,500

12,500

12,500

10,000

Electrical 440 V

6000

6000

6000

3000

6000

6000*

6000*

Electrical 1000 V

QR code for this page

Was this helpful?