Today, Xiaobian continues to introduce some relevant knowledge of the explosion-proof pressure switch. In the past few days, I have introduced the overview of the explosion-proof pressure switch, the principle, and so on. I will explain the maintenance process of the explosion-proof pressure switch here today. . This is similar to the maintenance of the pressure switch, but slightly different, Xiaobian began to introduce.
Explosion-proof pressure switch overhaul
1 Open the wiring chamber end cover, check whether the terminal screw is complete, whether the bolt is deformed, and whether the terminal base has cracks.
2 Open the main chamber by placing the isolation handle in the zero position.
3 Check whether the components are intact and complete. Check whether the transformer, contactor or relay coil, voltage (current) transformer is burnt, whether there is crack in the isolation switch casing, whether the contact has been burnt by the arc, and whether the wire is complete.
4 Power on, further electrical maintenance of the switch.
5 When the power is on and over, the components are sensitive and the test action is sensitive and reliable, in line with the manufacturer's regulations.
6 Check the synchronism of the vacuum contactor.
7 Check that the coil temperature of the transformer and various contactors or relays is normal.
8 Check if the display of the switch is normal.
9 Check the ground screw of the switch to meet the switch maintenance standards.
10 Use a multimeter to measure the load side voltage.
11 switch connected to the motor, carry out load test, the test time should not be less than 2 hours.
12 With the iron plug, iron ring and rubber ring of the switch wiring bell mouth.
13 If the explosion-proof surface does not meet the explosion-proof regulations, it must be phosphatized with sandpaper.
14 Remove the crust from the switch casing, wipe the casing with a rag, and paint the casing.
15 The inspection is completed and stored in the warehouse.
