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CTW5Z Series DC Intelligent Air Circuit Breaker

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  • CTW5Z Series DC Intelligent Air Circuit Breaker
  • CTW5Z Series DC Intelligent Air Circuit Breaker
Zhejiang Chengtong Electric Power Technology Co.,Ltd.

CTW5Z Series DC Intelligent Air Circuit Breaker

Model: CTW5Z

The DC type has 2P, 3P, and 4P shapes, which can be selected in various ways to meet the different needs of various DC power supply systems, such as negative grounding, neutral grounding, and insulation system.

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  • Product Details
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Model CTW5-2500 CTW5Z-2500
Pole Only DC/3/4
Rated current(adjustable)In(A) 800,1000,1250,1600,2000,2500
Rated working voltage Ue(V) AC400,AC690,AC800,AC1000,AC1140
DC250,DC500,DC750,DC1000,DC1500
Impulse withstand voltage Uimp(kV) 12
Breaking Class None-Normal, S-High capacity, H-Ultra-high capacity
Rated limit short-circuit breaking capacity lcu(kA) DC-Type AC-Normal AC-S AC-G
DC250V 2P/3P    80 4P    85 AC400V 50 AC400V 65 AC400V 85
DC500V 2P/3P    70 4P    75 AC690V 40 AC690V 50 AC690V 75
DC750V 2P/3P   60 4P    65 AC800V 36 AC800V 42 AC800V 65
DC1000V 2P/3P    50 4P    55 AC1000V 32 AC1000V 36 AC1000V 50
DC1500V 2P/3P   40 4P   45 AC1140V 32 AC1140V 36 AC1140V 50
Rated short time withstand current Icw(kA)/1s 100%lcu
Rated running short-circuit breaking capacity lcs(kA) 100%lcu
Installation Fixed, Drawer
Main circuit wiring Horizontal wiring, Vertical wiring


1. Apply to -40°C~ +70°C, average value in 24h not higher than 35°C
2. When higher than +40°C, users should reduce capacity, see data in Table below

Ambient temperature +40℃ +45℃ +50℃ +55℃ +60℃ +70℃
2500 800A 800A 800A 800A 800A 800A 800A
1000A 1000A 1000A 1000A 1000A 1000A 1000A
1250A 1250A 1250A 1250A 1250A 1250A 1250A
1600A 1600A 1600A 1600A 1600A 1600A 1600A
2000A 2000A 2000A 2000A 2000A 2000A 2000A
2500A 2500A 2500A 2500A 2350A 2200A 2100A

DC wiring method

Note 1. Only CTW5Z-2500 selectable
Note 2. The 4P series negative grounding system requires this connection method to ensure that the positive pole of the power supply is connected in series with three sets of contacts.

Wiring method example

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