Maintenance of Medium Frequency Spot Welding Transformer

2021-10-19 09:14

1. Primary ground insulation inspection
 
Requirements for primary ground insulation inspection 1. Tools: 1000v shaking table 2. Measurement method: First, remove the incoming wire of the primary transformer, clamp one of the two pens of the shaking table at the terminal of the primary incoming wire of the transformer, and clamp the other on the screw fixing the transformer. Shake 3 to 4 turns to observe the change in the block. If there is no group size, it proves that the transformer is well insulated to the ground. If the resistance is less than 2 megohms should be abandoned. And notify the maintenance.
 
2. Inspection of secondary rectifier diode
 
It is relatively simple to check the secondary rectifier diode. Use a digital display multimeter to hit the diode position. The red stylus is on the top and the black stylus is on the bottom. It is normal if the multimeter displays between 0.35 and 0.4. If the value is below 0.01 it indicates that the diode has broken down. Unable to use
 
3. Inspection of cooling water circuit
 
When the welding machine is working, there is a large current through the transformer, so the transformer will produce a certain amount of heat. Therefore, the unobstructed cooling water will be particularly important. How to ensure that the cooling water path is unobstructed? First of all, to ensure that the water added to the ice water machine matching the welding machine is pure water or distilled water. Secondly, the cold water shortage pipe should be dredged by high-pressure air gun every other quarter. Clean the water tank and condensate sheet of the ice water machine.

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