DAA series Low Voltage Air circuit breaker is suitable for the circuit of AC 50Hz/60Hz with rated service voltage 400V, 690V and rated service current up to 6300A. It is mainly used to distribute electric energy and protect circuits and electric equipment against over-load, under-voltage, short-circuit and single-phase earthing fault.

With intelligentized and selective protection functions, the breaker can improve the reliability of power supply, and avoid unnecessary power failure. The breaker is applicable for power stations, factories, mines (for 690V) and modern high-buildings, especially for the distribution system of intelligentized building.

Ambient Temperature: Range from -5ºC to +40ºC. 24h average does not exceed +35ºC.
Altitude: Installation site altitude should not exceed 2000m.
Humidity: Relative humidity ≤ 50% at +40ºC. Higher humidity permitted at lower temperatures (e.g., 90% at +25ºC).
Vertical Inclination: Should not exceed 5° during installation.