The power supply for the 50 ton underhung crane is three-phase AC (three-phase four-wire system) with a frequency of 50Hz/60Hz and a voltage of ≤1000V (3kV, 6kV, or 10kV as required). The voltage fluctuation of the power supply system where the crane feeder is connected shall not exceed ±10% of the rated voltage. The orbital installation of cranes shall meet the GB/T tolerance requirements. However, do you the working condition of 50 ton underhung crane?
Working condition of 50 ton underhung crane:
(1) The temperature of the radiant heat at the hook part of the hoisting article does not exceed 300°C.
(2) Climatic conditions when the crane works indoors:
The ambient temperature does not exceed +40°C, and the average temperature within 24 hours does not exceed +35°C;
The ambient temperature is not lower than a 5°C; the relative humidity does not exceed 50% at a temperature of +40°C.
(3) Climatic conditions when the crane works outdoors:
The ambient temperature does not exceed +40°C, the average temperature within 24 hours does not exceed +35°C, and the ambient temperature does not fall below -20°C. The relative humidity when the ambient temperature does not exceed +25°C allows temporarily up to 100%.
(4) Working pressure should not be greater than: Inland 150 Pa (equivalent to 5 winds), coastal 250 Pa (equivalent to 6 winds); non-working maximum wind pressure: generally 800 Pa (equivalent to 10 winds), Can also be agreed separately.
The grounding resistance of crane running track should not exceed 4Ω. The altitude at which the crane is installed and used shall not exceed 1000m (if the distance exceeds 1000m, the capacity of the motor shall be checked in accordance with the provisions of GB 755, and the capacity of the electric device shall be checked when exceeding 2000m).
