(1) The power supply of overhead crane for lifting is three-phase AC (three-phase four-wire system), the frequency is 50Hz/60Hz, and the voltage is less than or equal to 1000V (it can also be 3kV, 6kV or 10kV as required). The voltage fluctuation of the power supply system at the connection point of the crane feeder shall not exceed ±10% of the rated voltage.
(2) The rail installation of overhead crane for lifting operation should meet the GB/T level tolerance requirements.
(3) The radiant heat temperature of the lifting items to the hook of the crane shall not exceed 300 °C.
(4) Climatic conditions for overhead crane for lifting working indoors:
The ambient temperature does not exceed +40℃, and the average temperature within 24h does not exceed +35℃;
The ambient temperature should not be lower than -5°C; the relative humidity should not exceed 50% at a temperature of +40°C.
(5) Climatic conditions when overhead crane for lifting work outdoors:
The ambient temperature should not exceed +40℃, the average temperature within 24h should not exceed +35℃, and the ambient temperature should not be lower than -20℃. Relative humidity temporarily up to 100% is permitted when the ambient temperature does not exceed +25°C.
(6) The working wind pressure should not be greater than: 150Pa inland (equivalent to Grade 5 wind), 250Pa in coastal areas (equivalent to Grade 6 wind); the maximum wind pressure in non-working state: generally 800Pa (equivalent to Grade 10 wind), It can also be agreed otherwise.
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