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Most people would agree that hv Transformers, if that means transformers for over 1000 v, are never small.
The size of a transformer is determined by physical limits. The iron-based magnetic core of a transformer is a material with a limit to the permitted flux-density allowed if losses are to be kept to a reasonable level. Therefore the core size is determined by the maximum magnetic flux required, whch in turn sets the volts-per-turn figure for the windings.
The current in the windings is set by the size of wire used, which depends on the number of turns required. A large core allows fewer turns for a given voltage, therfore thicker wire can be used. Therefore a larger core allows thicker wire and more current.
Thus the size of a transformer is set by its power-handling requirement. HV transformers are increased in size by the need to maintain adequate insulation on the high-voltage windings.
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What is the meaning of 32Yd1 on a transformer?
This is 3 Nos Two Winding Transformers put together to form of Three Phase transformer, HV is Star Connected & LV is Delta Connected in the LV phase is leading by 30 Degree with respect to HV phase
What is the output voltage of a transformer if the turns ratio is 0.5?
It is a Step-Up Transformer which has 2 times voltage in secondary(HV) than primary(LV)
What is the meaning of suffix YNaOd1 in vector group of transformer?
i understand that YNaOd1 represent an auto transformer with HV winding as wye connected and loaded tertiary. Please correct me if i am wrong.
What is the purpose of a high voltage transformer?
if the transformer is distributing transformer then we shoud have to give more prefer to the high volatage to reduce losses if we distibute power at low volage there is more current which causes more losses and in hv system there is high volage and low is current so the losses are also low
How do you carry out short circuit test on power transformers?
For carrying Short Circuit Test on Power Transformer Do the following: 1] Isolate the Power Transformer from service. 2] Remove HV/LV Jumps and Disconnect Neutral from Earth/Ground. 3] Short LV Phases by Cu/Al plate which could withstand short circuit current and connect these short circuited terminals to Neutral 4] Energise HV side by LV supply (440 3ph Supply) with OLTC tap position on Normal. 5] Measure Current in Neutral, LV line voltages, HV Volatage and HV Line Currents on various OLTC Tap position. Analysis: If Neutral current is near to zero transformer windings are OK If Neutral current is higher or equal to Line current between LV Phase one of the winding is Open.
