As for dry-type transformers and core body exposed to the air, if the humidity in the environment, it will cause insulation resistance drop, what are we supposed to? See it.

If insulation resistance can reach 10 M /KV (Core right to resistance than an M) above, As long as no Dewing surface coil products will be able to directly vote Network Operation, with the course running transformer temperature rise Insulation resistance will be gradually restored to normal.

If insulation resistance of less than 10 M /KV (right to the core resistance of less than 1 M), which according to the following methods to deal with it.

A. If the transformer minor moisturizing, can be used directly as large lamp for baking, but a longer time, usually 10 days. Baking pm Fans drive better results; attention from the main bulb not too close to, uh, half a meter again. Ontology might otherwise damage the insulation.

B. If the insulation resistance greater than 2 M /KV (Core right to resistance is greater than 0.1 M), use empty baking method. What is empty now? HV will open the way for low-voltage Tuanthong rated voltage (LV products generally rated voltage of 400V. Will the voltage of 380V City) baking four hours it can meet the conditions for networks. However, it must be noted high side voltage of up to 10,000 volts of electricity when Canada must do security work to prevent intrusion.

C. If the transformer serious moisturizing, in particular has been immersed in water, to adopt short-circuit method. Act! Short circuit, the low pressure Copper shorted (shorted copper and low-emission cross section Copper considerable wit). HV Tuanthong not exceed impedance voltage three-phase power supply. For example, 10KV high pressure, or hypertension impedance 4%/6%; Rank, impedance 6% products, Hypertension can direct three-phase 380V electricity for Baking. But HV power cables into line not less than 3A/mm2 section.