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LED explosion-proof lamp - analysis of the line of the explosion-proof lamp
Author: source: Datetime: 2018-09-04 15:21:23
LED explosion-proof lamp 1, location selection
Electrical wiring should be routed where the risk of explosion is small or remote from the source of release.
2, laying method selection
The electrical lines in the explosion hazardous environment mainly include explosion-proof steel pipe wiring and cable wiring.
3. Isolation seal
Non-combustible materials should be tightly blocked when laying the electrical circuit's channel and protecting the pipe, cable or steel pipe through the partition or floor between areas with different levels of explosion hazardous environment.
4, wire material selection
In the area of explosion hazardous environment hazard level 1, the distribution line shall be copper conductor or cable. In the case of severe vibration, a multi-strand copper core cable or a multi-strand copper core cable should be used. Aluminum core power cables shall not be used in coal mines.
In the range of explosion hazard environment hazard level 2, the power line shall adopt aluminum core wire or cable with a cross-sectional area of 4mm2 and above, and the lighting circuit may adopt a cross-sectional area of 2.5 mm2. And above aluminum wire or cable.
5, allow current carrying capacity
For the selection of insulated conductor sections and cable sections in Zone 1 and Zone 2, the allowable current carrying capacity of the conductor shall not be less than 1.25 times the rated current of the fuse and the set current of the long-delay overcurrent release of the circuit breaker. The allowable current carrying current to the branch of the low-voltage cage induction motor shall not be less than 1.25 times the rated current of the motor.
6, the connection of electrical lines
The intermediate connections of the electrical lines in Zones 1 and 2 must be in the vicinity of the explosion-proof junction box or splice box that is compatible with the hazardous environment. The explosion-proof junction box should be used in Zone 1, and the increased safety junction box can be used in Zone 2.
If the aluminum line cable or wire is used in the electrical circuit of Zone 2, it must be reliable for the correct installation and maintenance of the user.