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

The product meets the following standards:

IEC60947-2 （GB/T14048.2）；

ASTM B633 II。

work environment

2.1 The maximum temperature range for storage and transportation is -10 ℃ to 85 ℃, the operating range is -10 ℃ to 75 ℃, and the reference temperature is 55 ℃.

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

2.3 The external magnetic field of the installation site shall not exceed 5 times the geomagnetic field in any direction, and large electromagnetic interference (such as high-power motors or frequency converters) shall be avoided as much as possible near the product. There shall be no explosive or corrosive gases, no rain or snow invasion, and it shall be dry and ventilated.

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

technical requirement

3.1 Rated working voltage: Ue AC400V/AC230V.

3.2 Rated operating frequency: 60Hz.

3.3 Rated insulation voltage Ui AC800V.

3.4 Rated withstand impulse voltage: Uimp 8kV.

3.5 ECB circuit breaker protection level IP30.

3.6 Insulation resistance ≥ 1000M Ω.

3.7 Contact resistance between incoming and outgoing lines ≤ 500 μ Ω.

3.8 The distance between the dynamic and static contacts (incoming and outgoing lines) should be ≥ 2000V AC/1min.

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

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

3.11 Rated ultimate short-circuit breaking capacity Icu Rated operating short-circuit breaking capacity is shown in Table 1.

Table 1

3.12 The electric operating mechanism should be able to reliably close the circuit breaker at 85% of the rated control power supply voltage; At 110% rated control power supply voltage, the closing operation should not cause any damage to the circuit breaker (10 times for each test operation).

3.13 The power supply for the motor operating mechanism should be independent of the presence or absence of power in the main circuit. Under the condition of no power supply in the main circuit and power supply in the control circuit, the motor operating mechanism should be able to work normally, and the circuit breaker should open and close normally according to the prescribed logic.