Troubleshooting Finding Services

FAULT 1: ABNORMAL NOISE

1. External Noise: There may be a loose-fitting bolt or nut from the transformer main cover or some other loose metallic parts. Now, just tighten the fixing bolt or nut and metallic parts from the body of the transformer.
2. Internal Noise: There are two kinds of internal noise.

This noise can be generated when the transformer winding has slacks or noise due to capacitance discharging. Now coming to the solution for the first reason, if your transformer is small then just open the transformer body and take up slackness by tightening in the core fixing bold. 

For the second noise problem, you just need to get an expert opinion from the manufacturer. Because they will give you the best solution to this problem.

FAULT 2: ABNORMAL TEMPERATURE RISING

1. Transformer Overheated: If you find out that the transformer is overheated then just reduce the loading to at least rated load.
2. Transformer Room: If the transformer room is not properly ventilated then try to improve the ventilation of the transformer room. 
3. Transformer Winding: Transformer temperature can rise if certain turns of the winding are short-circuited, increasing contact resistance at the tap changing system or any local short circuit in the main iron core. Now for troubleshooting this problem you just need to measure the per phase (If 3 Phase Transformer) resistance, measure the insulation resistance, and measure the load current (3-10% of rated current will be necessary)
4. Poor Termination: If there is poor termination either inside or outside of the transformer then check the external contract. 

FAULT 3: LOCAL FAULTS

1. Winding Short Circuit: If there is any short circuit in the transformer winding, then just flow the step from Fault 2: Problem 3.
2. Insulation: If there is any damage to insulation then just dismantle the transformer.