Install the main power switch of explosion -proof electric gourds in non -explosive gas dangerous environment: In the dangerous environment of explosive gas, once fires and explosions occur, it can easily cause chain explosion and larger fires. At this time, ambulance personnel will not be able to enter the scene for operation. It must be required to install the main power switch outside the dangerous place to cut off the power supply in the dangerous environmental area of the explosive gas to prevent the accident from expanding (except for not being powered off). The main power supply is equipped with overload protection, short -circuit protection, and ground failure protection for low -pressure circuit breakers.

Adopt TN-S system and equal potential connection: The introduction line of the explosion-proof gourd is 5 × 2.5mm2 heavy rubber set copper core multi-share mobile cable. Among them, the yellow-green two-color ground wire is drawn from the PE of the distribution cabinet. The rubber The total length of the cable is 135m, and there is no connector in the middle. Use the flat steel with yellow -green stripes and the copper nude line with 4mm2 to connect the steel track of the explosion -proof electric gourd, the metal architecture of the spray lacquer room, the explosion -free electrical cabinet on the ground, and the heating pipe to the ground. Equal potential connection.

Limator: In order to prevent the hook from surpassing the limit position, the hook hook impact roll tube, the roller was collisted and deformed, and even the steel wire rope was pulled out; The rope is squeezed and damaged by each other, causing the steel wire rope to leave the roller accident. The lift height limiter is used to ensure that the hook reaches the upper and lower limit positions, and the power supply of the lift motivation will be cut off in time to ensure safety.

Rolling wheel material for cable: explosion -proof electric gourd cables Bald wheels use engineering plastic materials to avoid sparks produced due to friction.

The voltage drop of the length of the 135M rubber sleeve cable: The "Code of the Design of the crane" (GB/T 3811-2008) stipulates that the power supply is powered on the power supply. The total voltage drop of the power supply shall not exceed 15%of the rated voltage. Due to the long length of the mobile cable and the small cross -sectional area, the voltage drop of the cable is required.

The lifting motor is 1.5kW, the rated current is 4.3A, the starting current is 24A; the motor is 0.2kW, the rated current is 0.72A, and the starting current is 4A.