2. Differential protection is the active protection of the transformer, and the gas protection is the active protection when the internal fault of the transformer.
3. Different protection scopes:
A oil immersed power transformer differential protection:
1) Multi-phase short circuit occurs in the main transformer lead-out line and the transformer coil.
2) Single-phase severe inter-turn short circuit.
3) Protect the grounding fault of the coil and the lead wire in the high current grounding system.
B gas protection:
1) Multiphase short circuit inside the oil immersed distribution transformer.
2) Short circuit between turns, short circuit between turn and iron core or outside.
3) Oil-immersed transformer core failure (heating burn).
4) Oil leakage under the oil surface.
6) Poor contact of the tap-changer or wire welding is not tight
ZTELEC oil-immersed power transformer, explosion-proof, maintenance-free.
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