How is the interlock for the positive pressure chamber implemented?
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In GB50058-2014, 5.2.4.2: “Electrical equipment shall be interlocked with the ventilation system.” Ventilation should be carried out prior to operation, and the main power supply of the equipment should be connected only when the ventilation volume is more than 5 times the volume of the electrical equipment and its ventilation system ducts. I would like to ask the teachers how this is achieved?
This large motor is equipped with positive pressure fume hoods, within which positive pressure ventilation switches are connected to the DCS to enable interlocking
Large motors, especially those with a voltage of 10,000V or more, have this feature; it is necessary to purge them before turning them on