Why we Specify Transformer rating 433 V Instead of 415V
?
- 8 Answers
- 33562 Views
- ABB, ERA, Uddans, I also Faced
- E-Mail Answers
Answer Posted / andy d
It is to do with the transformer % impedance, As mentioned open circuit LV side of a transformer would measure 433V, Fully loaded the transformer volt drop is equal to the % impedance. A typical 1MVA DY11 transformer would be around 5% impedance at full load, i.e. the secondary voltage reduces voltage to 411V. This is a lower value then 415V however it is not advisable to run transformers at 100% if you want a long life.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
what is the earth current,reverse power,electrical trip generator short circuit,low voltage, high voltage please discribe me
what is the carona effects meaning in HT line transmmission system
A cable with concentric PE conductor must be used with frequency converter circuits what does its means.?
c++ write a program to use a fuction call "max"which accepts an intger arrey of size5.as an arrument and return the larger and smallest of the arrey to main without changing. the original changing of the original position of the element of the arrey.
What is difference between safe PLC and normal PLC
What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.
How will you utilise electrical power? You can start from the generating station.
What should be the percentage increase in length of the dead end clamp for bus bar conductor (Hawthorn) after hydraulic pressing and what should be the applied pressure?
what is current check gurd relay?
What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?
1. Why is the speed of shunt motor practically constant? 2. Why dc series motor use to start with heavy loads? 3. advantages & disadvantages of separately excited generator over self excited generator?
Sir, plz tell me how droop setting is done in parellel operation od DG set ? please give practical example ?
How do u analyse protection fault when vcb tripping on load
why actual valve timing diagram is different than ideal valve timing digram of a 4 stroke engine?
What is mean by Sensitive Earth fault & what are the effects
