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.