0614CT1701

Selecting Masterpact MTZ2 Circuit Breakers

Ratings for UL489 Masterpact MTZ2 Circuit Breakers

Frame Rating

800/1200/1600/2000 A

2500/3000 A

Number of Poles

3/4

Interrupting Rating Code

N

H

L

LF

H

L

Interrupting Current (kAIR)

240 Vac 50/60 Hz

65

100

200

200

100

200

480 Vac 50/60 Hz

65

100

150

150

100

150

600 Vac 50/60 Hz

50

85

100

100

85

100

Short-Time Withstand Current (kA)

Vac 50/60 Hz, 0.5 s

42

65

30*

22

65

65

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

90

90

80

55

150

150

Close and Latch Ratings (Peak kA)

Vac 50/60 Hz

90

90

55*

50

90

90

Tested to show arc flash hazard risk category (NFPA70E)

Yes

Breaking Time

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

Closing Time

70 ms

Sensor Rating

400–800 A / 600–1200 A /
800–1600 A / 1000–2000 A

1200–2500 A /
1600–3000 A

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

Mechanical

12,500*

12,500*

12,500*

12,500*

10,000

10,000

Electrical

2800*

2800*

2800*

2800*

1000

1000

Ratings for ANSI C37 Certified Masterpact MTZ2 Circuit Breakers

Frame Rating

800/1600 A

2000 A

3200/4000 A

Number of Poles

3/4

Interrupting Rating Code

N1

H1

H2

H3

L1* *

L1F*

H1

H2

H3

L1* *

L1F*

H1

H2

H3

L1* *

Interrupting Current (kAIR)
(50/60 Hz)

254 Vac

42

65

85

100

200

200

65

85

100

200

200

65

85

100

200

508 Vac

42

65

85

100

200

200

65

85

100

200

200

65

85

100

200

635 Vac

42

65

85

85

130

130

65

85

85

130

130

65

85

85

130

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

Vac, 0.5 s

42

65

85

85

30

22

65

85

85

30

22

65

85

85

100

Built In Instantaneous Override (Peak kA ±10%)

190

80

55

190

80

55

190

270

Close and Latch Ratings (Peak kA)

Vac
(50/60 Hz)

90

150

90

90

55

50

150

90

90

55

50

150

90

90

90

Tested to show arc flash hazard risk category (NFPA70E)

Yes

Yes

Breaking Time

25 to 30 ms (with no intentional delay) 9 ms for L1 and L1F

Closing Time

70 ms

Sensor Rating

400–800 A, 800–1600 A

1000–2000 A

1600–4000 A

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

Mechanical

12,500

10,000

10,000

5000

Electrical

2800

1000

1000

1000

Ratings for IEC60947–2 Rated Masterpact MTZ2 Circuit Breakers

Frame Rating

800/1000/1250/1600 A

2000 A

2500/3200/4000 A

Interrupting Rating Code

N1

H1

H2

L1

H10

N1

H1

H2

H3

L1

H10

H1

H2

H3

H10

Ultimate Breaking Capacity (kA) 50/60 Hz

Icu

220/415 Vac

42

65

100

150

42

65

100

150

150

65

100

150

440 Vac

42

65

100

150

42

65

100

150

150

65

100

150

525 Vac

42

65

85

130

42

65

85

130

130

65

85

130

690 Vac

42

65

85

100

42

65

85

100

100

65

85

100

1150 Vac

50

50

50

Service Breaking Capacity (%)

Ics

% Icu

100

100

100

100

100

100

100

100

100

100

100

100

100

100

100

Short-Time Withstand Current (kA)

Icw

Vac 50/60 Hz, 1 s

42

65

85

30

50

42

65

85

65

30

50

65

85

65

50

Vac 50/60 Hz, 3 s

22

36

50

30

50

22

36

75

65

30

50

65

75

65

50

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

190

80

190

150

80

190

150

Rated making Current (Peak kA) 50/60 Hz

Icm

220/415 Vac

88

143

220

330

88

143

220

330

330

143

220

330

440 Vac

88

143

220

330

88

143

220

330

330

143

220

330

525 Vac

88

143

187

286

88

143

187

286

286

143

187

286

690 Vac

88

143

187

220

88

143

187

220

220

143

187

220

1150 Vac

105

105

105

Breaking Time

ms

25

25

25

10

25

25

25

25

25

10

25

25

25

25

25

Closing Time

ms

< 70

< 70

< 70

Sensor Rating

400–800 A / 800–1600 A

1000–2000 A

1600–4000 A

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

Mechanical

12.5

10

10

Electrical 440 V

10

10

10

3

8

8

8

3

3

5

5

1.25

Electrical 1150 V

0.5

0.5

0.5

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