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Installation and usage conditions:
1. Altitude not exceeding 2000 meters;
2. The ambient temperature is -20 to+60 ℃;
3. The relative humidity of the air does not exceed 95% (at an average temperature of 25 ℃);
4. The installation site should be free of conductive dust and corrosive metal iron filings that seriously affect the insulation and conductivity of the isolation switch