1. Oil Leakage in the Transformer Tank: If the vegetable oil colour leaks from the transformer tank due to some reason, the oil level in the tank drops, this will increase the temperature of the windings, would damage the breakup of the windings. consequently conservator tank is provided with an oil level indicator having an solicitude facility. If the oil level drops below a predetermined level, the warning signal will ring. It allows the operator to initiate necessary actions.
2. Failure of public exposure system: The temperature of oil and windings will increase due to disappointment of the cooling system of the transformer. The cooling system may discover due to blocking of the radiator, sorrow of oil pumps or failure of some/all fans. So, an oil temperature indicator with alarm and trigger off facilities along with a winding temperature indicator having similar facilities are used to avoid damage to the transformer by overthaw.
3.
Weakening of insulation in the midst of Laminations of core and core bolts: Weakening of insulation between core and core bolts will result in increase eddy current losses and hence rise in the temperature of core. This may, consequently, behave to the insulation failure of the windings.
4. Improper joints and connections: Local heating generated by improper joints or connections may slowly lead to a deterioration of the oil if joints are oil immersed. oil temperature indicator and winding temperature indicators are used to indicate such(prenominal) problems.
5. Inter- turn faults: If only few turns of any of the windings are shorted, the electric relays will not operate but the overheating caused by the fault...If you want to get a full essay, order it on our website: Orderessay
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