Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / a.p.nanjappa
Nothing happen. DC ground fault alarm persists. Generator
works as usaual.a single dc earth fault will not damage the
device.Just annouces there is weak insulation, trouble
shoot it. rotor is a dc circuit.
Do you mean DC circuit earth fault in avr
caabinet,slipring.
AVR means automatic voltage regulation -i.e when generator
voltage is high or low ,it corrects the filed current and
correct the voltage.
Now if there is a rotor earth fault, the AVR maintains the
voltage but there is current leaking. rotor fault should be
conveys through the air gap or oil film to ground. It is
detected by by a separat rotor earth fault detector known
as singlerotor earth fault. This single rotor must become
double rotor earth fault .Then there is circulating current
flowing and completes grund circuit , till the double earth
fault relay annuciate and isolate the generator.
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
Is a direct shorth ciruit on a branch MCCB in a Low Voltage Switchboard a correct means of tesing the performance for discrimination?
Can anyone please give me the parameters , formula needed to calculate the circuit breakers for building services.Thanks
what is ic 01,ic 06 ?is it types of cooling?
FOR 16/20 MVA 132/33 KV ONAN/ONAF TYPE TRANSFORMER IT IS DESIGNED FOR 16 MVA WITH ONAN CONDITION.IT BECOMES 20 MVA UNDER ONAF CONDITION.LOAD LOSS IS GUARANTEED FOR 65KW AT 20 MVA AND % IMPEDANCE 13.75. PLEASE TELL US AT WHAT LOAD LOSS AND % IMPEDANCE IT SHOULD BE DESIGNED FOR 16 MVA AND WHAT WILL BE ITS EFFICIENCY AT 20 MVA?
pls tell what are doing the three phase motor star and delta connetion with circuit diagram and control wiring .
A cotter joint is generally used to transmit
Define cuttoff frequency?
What is instrumental error?
HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com
why only exciting current is shown not primary current in transformer???
What types of CMOS memories have you designed? What were their size? Speed? Configuration Process technology?
The size and construction of bushings in a transformer depend upon?
difference between Ac and Dc mcb ????
How to calculate the Efficiency of Chiller
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?
