Loose yoke clamps or other metal components can cause vibration, leading to core overheating, discoloration, and scorched varnish film. Upon inspection, if the fault is severe, remove the faulty laminations for repair, leaving the intact parts untouched. When reassembling the damaged laminations, the repaired laminations should be interleaved and mixed with the intact ones. After the repair, core loss and temperature rise tests must be conducted. Read More

The magnitude of the main magnetic flux in a transformer core is determined by the excitation current. Since the no-load current of a transformer actually varies with its operating voltage, a higher voltage results in a larger no-load current, which in turn increases the excitation current. Conversely, a lower voltage leads to a smaller no-load current. Read More

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