The rated insulation voltage of the three-phase three-wire automatic reclosing circuit breaker is 800V, suitable for distribution networks with an AC frequency of 60Hz, a rated voltage of 400V and below, and a rated current up to 1000A. Under normal circumstances, the circuit breaker can be used for infrequent line switching and infrequent motor starting.

The product complies with the following standards:

IEC60947-2  （GB/T14048.2）；

ASTM B633 II。

working environment

2.1 The extreme temperature range for storage and transportation is -10℃ to 85℃, with an operating range of -10℃ to 75℃, and a reference temperature of 55℃.

2.2 Atmospheric conditions: The maximum temperature is 40℃, and the maximum relative humidity is 95%.

2.3 The external magnetic field at the installation site should not exceed 5 times the strength of the geomagnetic field in any direction. Large electromagnetic interference (such as high-power motors or frequency converters) should be avoided in the vicinity of the product. The installation site should be free from explosive and corrosive gases, protected from rain and snow, and dry and ventilated.

2.4 Pollution level: Level 3; Installation category: III.

Technical Requirements

3.1 Rated operating voltage: Ue AC400V/AC230V.

3.2 Rated operating frequency: 60Hz.

3.3 Rated insulation voltage Ui is AC800V.

3.4 Rated withstand impulse voltage: Uimp 8kV.

3.5 The protection level of the ECB circuit breaker is IP30.

3.6 Insulation resistance ≥ 1000MΩ.

3.7 The contact resistance between the incoming and outgoing lines is ≤500μΩ.

3.8 The voltage between the moving and stationary contacts (between the incoming and outgoing lines) is ≥2000V AC for 1 minute.

3.9 The dielectric strength between phases is ≥4000V AC/1min.

3.10 Rated instantaneous short-circuit current setting value: 10In±15%.