Related Topics

  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

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generators

Protection of Transformer

The power transformer is costly equipment and highly reliable pieces of equipment of the Sub-station. So, the protection of transformer is the most vital. Different types of faults may occur in the transformer, if the fault sustains for a long time, the transformer will damage. Therefore, it is required to trip the transformer from both ends i.e H.V & L.V side of the transformer as soon as possible when any fault occurs. The power transformer should also be protected from lightning surges, switching surges, arcing grounds etc. For protecting from the surges, lighting arrester are used at both end of the transformer.

The others different protections for the transformer are given below:

  1. Over current and Earth fault protection.
  2. Differential protection for transformer.
  3. Differential magnetic-balance protection.
  4. Restriction Earth fault (REF) protection.
  5. Buchholze Relay protection.
  6. Thermal protection ( i.e WTI & OTI protection ).
  7. Pressure released Device ( PRD ) protection.
  8. Fuse Protection.

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