Burnout of current transformer in high-voltage motor
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The motor of the reciprocating compressor has a voltage of 10,000 volts and a current of 160 A. After starting under no load, it stopped automatically after a short time; inspection revealed that the current transformer in the power distribution room was damaged. After inspection, the mechanical components of the compressor are in good condition, and the crankshaft rotation is normal. What could be the reasons for this to happen?
1. A secondary open circuit generates a high voltage. 2. When a current transformer is in use for an excessive period of time, its insulation deteriorates, leading to local breakdowns or discharges that generate overvoltage. 3. The primary connection surface of the current transformer is severely oxidized, resulting in high contact resistance.