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NDW3Z-2500/4000 Series Air Circuit Breaker
Updated：July 17,2026 17:32PM

The NDW3Z-2500/4000 DC air circuit breaker hereinafter referred to as the circuit breaker is suitable for DC distribution networks with rated currents from 800A to 4000A rated insulation voltage of DC1500V and rated operational voltages of DC500V/750V and DC1000V/1500V.It is used to distribute electrical energy and protect circuits and power supply equipment from faults such as overload undervoltage and short circuit. It also provides reliable isolation.
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NDW3Z-2500/4000
NDW3Z-2500/4000
NDW3Z-2500/4000
NDW3Z-2500/4000

Features of NDW3Z-2500/4000 Series

  • Supports multiple protection functions, including overload and short-circuit protection.
  • Available in both fixed type and withdrawable type structures.

Technology data of NDW3Z-2500/4000 Series

Circuit Breaker NDW3Z-2500 NDW3Z-4000
Number of poles in series (P) 2、3、4 3、4
Rated current In (A) 800、1000、1250、1600、2000、2500 1600、2000、2500、3200、3600、4000
Rated operational voltage Ue (V) DC500V/750V(2P、3P)、
DC1000V/1500V(4P)		 DC500V/750V(3P)、
DC1000V/1500V(4P)
Breaking type (Note 1) / S H
Rated ultimate short-circuit breaking capacity Icu (kA)
(Note 2)		 DC500V 2P 50 / /
3P 65 80 120
750V DC 2P 40 / /
3P 55 65 80
DC1000V 4P 50 55 75
DC1500V 4P 40 50 60
Rated service short-circuit breaking capacity Ics (kA)
(Note 2)		 100%Icu 100%lcu
Rated short-circuit making capacity Icm (kA) (Note 2) 100%Icu 100%lcu
Rated short-time withstand current Icw (kA) / 1s (Note 2) 100%Icu 100%lcu
Controller
 		 NWK20Z Controller ● ●
NWK22Z Controller ● ●
Installation method Fixed type ○ ●
Withdrawable type ● ●
Note 1: S indicates standard breaking capacity, and H indicates high breaking capacity.
Note 2: The time constant is 15 ms.
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Factory Address：Pudong, Shanghai, China / Jiaxing, Zhejiang, China
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Email：rfq@nader-circuit-breaker.com