1. The water-cooled generator insulation resistance tester is also called the generator insulation tester, and the main part is defective.
Detection method: the imbalance rate of DC resistance three-phase is much higher. greater than 4%, or a certain Phase* cannot pass.
Processing method: core inspection to determine the defect location, poor contact can be repolished and compacted, and poor quality welding can be rewelded. Insufficient welding area should be increased. If the lead part is insufficient, it must be replaced (added) to meet the demand.
2. Water Cooled Generator Insulation Resistance Tester Socket Switch Failure
Detection method: Measure the DC resistance of different sockets. If it's not connected at all, that means the switch is blown; if the DC resistance of the tap is turned offbalanced, this means that individual contacts are blown; if there is a strong burning smell, it means overheating or electrical arcing.
Processing method: basic inspection. If the switch contacts only show signs of overheating, poor contact, or minor arcing, they can be removed, serviced, and reused. If the burn is severe or the contacts discharge to the ground, the switch must be replaced. When the contacts are released to the ground, it will generally cause direction deformation of the voltage regulating section of the high voltage coil and the coil. needs to be revised or rewound (replaced).
3. Water-cooled generator insulation resistance tester coil failure Detection method: Generally, in oil conservator, fuel injection, fuel tank swelling , burning oil and other parts. occuroften, and the insulation resistance and DC resistance can be measured. The insulation resistance is zero and the DC resistance increases and is unstable.
Treatment method: Check the suspended core to determine the fault. If the damage is minor, it can be repaired and used. If the fault is serious, please consider replacing the coil. not tightly closed, technical modifications must be made.
4. Insulation drop of water-cooled generator insulation resistance tester
Detection method: Perform insulation and oil resistance tests on the transformer regularly. If the measured value changes significantly or is lower than the specified requirements, it can be determined that the transformer is wet or the oil insulation resistance has dropped.
Treatment method: transformer insulation resistance should be kept dry, insulation with moistureit must be replaced or filtered and the transformer's sealing and moisture absorption defects must be repaired.
5. Iron core failure of water-cooled generator insulation resistance tester
Detection method: measure the insulation resistance of the screw. If it is less than 10 megohms, it should be inspected.
Treatment method: After hanging the core, remove the damaged core screws and replace the insulation.