Why Choose CWNE Air Circuit Breakers

CWNE produces the WN45-2000 air circuit breaker under ISO 9001, ISO 14001 and OHSAS 18001 management systems with CCC-certified products. It is a high-current breaker for main incoming and feeder protection where intelligent, selective protection and remote communication are required.

Applications

Air Circuit Breaker FAQ

When should I use an air circuit breaker?

Use an air circuit breaker for high-current main incoming or feeder protection, typically in substations, industrial plants and large buildings where selective protection is required.

Can it connect to automation systems?

Yes. The WN45-2000 provides a standard RS485 interface supporting telemetry, remote signalling, remote control and remote adjustment.

What current range is available?

The WN45-2000 covers rated currents from 400 A to 6300 A.

How to Choose an Air Circuit Breaker

Choose an air circuit breaker where the current demand and short-circuit level are high, typically for main incoming or feeder protection.

Confirm the duty and rating

  • Rated current (the WN45-2000 covers 400 A to 6300 A).
  • System voltage (up to 690 V AC).
  • Breaking capacity against the prospective short-circuit current.

Decide the protection and control needs

Confirm the protection functions (overload, under-voltage, short circuit and single-phase earth fault) and whether RS485 communication is required to connect the breaker to a control or automation system.

What to send for a quotation

Provide the system voltage, required rated current, prospective short-circuit current, protection functions, communication requirement and quantity.

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