3 injection explosion

Injection transformer explosion due to internal arc fault short circuit current and high temperature so that the rapid aging of transformer oil, and protection devices has failed to cut off the power, the fault persists a long time, so that the pressure within the tank continued to grow, high-pressure oil and gas pipe explosion or from the intensity of the vulnerabilities of other cabinet spray formation accident.

(1) Insulation damage: inter-turn short circuits overheating the insulation damage; water to wet insulation damage to the Transformer Manufacturer; lightning and other over-voltage damage to insulation and other fundamental factors leading to internal short circuit.

(2) break arc: poor welding wire line group, loose wire connections in the high-current shocks and other factors may cause disconnection, break arc at high temperature oil and gas led to increased internal pressure.

(3) tap changers fault: the regulating power distribution transformer high voltage winding section of the coil is connected through the tap, tap the contact in series with the high voltage winding circuit, and winding through the load current and with short-circuit current, such as tap-static and dynamic contact heat, arc flash, the voltage regulator section of the coil circuit.

4 serious oil spill

Leakage of transformer oil to run quite common in the oil level within the limits prescribed, or arrangements can continue to run scheduled maintenance. However, serious transformer oil leakage, or continuous spills from breakage constantly, so that the oil level gauge oil level has not seen, you should immediately stop operating the transformer, Trapping and refueling.

Oil transformer oil is too low, so that lead and tap the casing exposed to the air, insulation levels will be greatly reduced, so easy to cause breakdown discharge. Transformer caused by leakage of reasons: weld cracking or seal failure; run by the shock; external collision; tank corrosion and other serious damage.

5 tube flashover

Transformer bushing fouling, in fog or rain caused by flashover, the single-phase transformer or high voltage side and white shorts. Transformer casing due to external collision or mechanical stress, thermal stress and damage is caused by flashover factors. Transformer cover off the foreign body, such as the wind blew the branches when the lid or white short-circuit caused by the discharge tube.

Above the sound of the Buck boost Regulator, temperature, oil level, appearance and other phenomena to determine the distribution transformer failure, only as a preliminary to determine the visual scene. Because the transformer internal fault not only reflect a single visual area, it involves many factors, and sometimes may even be false. Characteristics of the transformer must be carried out when necessary tests and comprehensive analysis, in order to accurately and reliably identify the cause of the failure, identify the nature of the accident, made a more comprehensive and rational approach.