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‣  Protection of Transformer‣  Equivalent Circuit diagram of single phase Transformer ‣  Core type Transformer and Shell type Transformer‣  Transformer with winding Resistance and Magnetic Leakage‣  Transformer with winding Resistance but No Magnetic Leakage‣  Equivalent Resistance of single phase Transformer‣  Magnetic leakage of Single Phase Transformer‣  Oil Flow Indicator of the pump of Power Transformer‣  Silica Gel Breather of Transformer‣  Oil Pump of Transformer ‣  Radiator of Transformer and working of Radiator‣  PRD of Transformer‣  MOG ( magnetic oil gauge ) of Transformer‣  Bushing of Transformer ( for H.V side and L.V side )‣  WTI and OTI of Transformer‣  Buchholz Relay of Transformer and Working of Buchholz Relay‣  Conservator tank of Transformer‣  What is a Power Transformer ?‣  Short Circuit Test or Full load Cu loss of Transformer ‣  Open circuit test or No load Test of Transformer ‣  Parallel operation of 3-phase Transformer‣  Earthing or Neutral Grounding Transformer ‣  Transformer on On load Condition ‣  What is a Transformer ?‣  E.m.f Equation of Transformer ‣  Transformer on No load Condition

Index

Radiator of Transformer and working of Radiator

Radiator is a bank of hollow pipe line which is used to transfer the thermal energy from one medium to another for the purpose of cooling. Some Bank are used at the power transformer for cooling the transformer oil as well as reduces the winding temperature under loading condition. The radiators are connected to the transformer through pipe line at upper and lower side of the transformer which is shown in fig.

Working principal:

When the transformer is under loading condition, the transformer will be heated enormously and that heat has to be reduced under limited value otherwise the transformer may me damaged due over heating. We can easily reduce the temperature of the transformer by applying radiator bank.Now , we describe how it is reduce the temperature of transformer oil . As per convection heat transfer law, warm oil increases in volume and comes to the upper portion of the main tank and this heated oil enters in the radiator through top valve and cools down by dissipating heat through the thin radiator wall. This cold oil comes back to the main tank through the bottom valve. This cycle is repeated continuously till the load is connected to the transformer. Dissipation of heat radiator can be get faster by force air provided by means of fans. At higher ratting transformer( i.e <= 50 MVA Tr.), an oil pump may be used for speeding up oil circulation.

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