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Application

HR3 series fuse switch-disconnector with fuse is applicable in the circuit of AC50Hz, rated voltage AC380V and below, rated current up to 1000A. HR3 series are infrequently manually operated multipolar fuse combination switches, They break or switch off on load and provide safely isolation and protection against overcurrent for any voltage electrical circuit.
Standard: IEC/EN 60947-3.

Ambient temperature: -5°C~+40°C

Altitude: ≤2000m;
When the ambient air temperature is +40°C, the relative humidity of the air shall not be higher than 50%; a higher relative humidity is allowed at a lower temperature; for example, for the wettest month, the maximum relative humidity averaged shall be 90% while the lowest temperature averaged in that month +20°C, and special measures shall be taken for the condensation occasionally produced due to temperature change.
Pollution degree: 3
The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt.

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