What are the requirements of the positive pressure explosion-proof distribution cabinet on the safet

 Type positive pressure explosion-proof power distribution cabinet is made of isolation medium clean non-flammable gas, through the protection device, control unit, the positive pressure cavity of the shielding gas and the external pressure has certain positive pressure, which can prevent the flammable explosive in positive pressure inside the shell. In accordance with the provisions of the relevant type of positive pressure explosion-proof power distribution cabinet in the security measures to satisfy the following four aspects.

1. Positive pressure explosion-proof power distribution cabinet must be processed in other explosion-proof forms before it is put into operation or after it is out of operation.

2. For the operation of the explosion-proof type positive pressure device before, it is the job of ventilation with adequate protection gas by positive pressure shell and pipe, this is for may exist in the internal of an explosive mixture concentration to minimize cannot. This involves two parameters of ventilation and ventilation time. This is related to the pipeline volume of each product.

3. Reliable measures should be taken to ensure that before forming the positive pressure housing, the electrical appliances installed inside and outside the positive pressure housing are not electrified. Only when the positive pressure value of 50Pa is satisfied after forming can the internal electrical appliances be electrified for use.

4. The setting of electrical equipment must be reliable automatic device, to ensure that in the start and operation, when the value of the shell of the positive pressure explosion-proof power distribution cabinet is lower than the regulation, the electrical equipment used in the internal can automatically switch power, and will issue alarm sound and alarm signal light.