After installation, due to negligence, the transport locking pins (or positioning nails) on the tank cover were not flipped back or removed, causing the core to touch the tank shell. Other causes include: core clamping limbs touching the core limbs/columns; warped silicon steel sheets touching the clamping limbs; cardboard spacers between the lower core clamp feet and the iron yoke falling off, causing the clamp feet to touch the silicon steel sheets; or the thermometer socket being too long and touching the clamps, yoke, or core column. Read More

The two key conditions for demagnetization are: alternating magnetic poles and decreasing magnetic field strength. To demagnetize a ferromagnetic material, the uniformity of its magnetic domain alignment must be disrupted, making the arrangement of the magnetic domains completely random so that no magnetism is exhibited externally. Read More

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