Question { 2711 }
A group of machines (wind turbines) connected with 33KV
feeder and each machines are having individual VCB. The 33KV
feeder connected with 110KV/33KV substation. The 33KV feeder
tripped by over current at Substation and fault recorded at
Substation as OC-R&Y phase. Same time the group of machines
VCB tripped by over voltage, the fault recorded voltage was
above 66KV by numerical Under/Over voltage relay. While grid
drop time, this much of voltage hike is possible?
Answer
Is This Answer Correct ? | 1 Yes | 0 No |
Question { HBL Power Systems, 5442 }
What is the permissible value of earth resistance and as per
which standard / act / rule ?
Answer
Is This Answer Correct ? | 0 Yes | 0 No |
Question { 3019 }
in magnetic field we send current to generate flux,why not
voltage?
Answer
Is This Answer Correct ? | 0 Yes | 0 No |
why battery dc voltage become Half when we check with
respect to ground for example 120volts + and - terminals
and when we check + terminal with Earth thats 60volts why
60volts we can not ground the battery.
Answer
Is This Answer Correct ? | 6 Yes | 3 No |
why battery dc voltage become Half when we check with
respect to ground for example 120volts + and - terminals
and when we check + terminal with Earth thats 60volts why
60volts we can not ground the battery.
Answer
Is This Answer Correct ? | 0 Yes | 0 No |
Question { 6344 }
HOW TO CALCULATE BATTERY BACKUP TIME & AH CAPACITY AGAINST UPS
KVA RATING?
Answer
Is This Answer Correct ? | 3 Yes | 0 No |
DEAR ALL
I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm
but new local pwer is 220v 60 hz
requierd rpm should be 1000
pleas what the beast solution is used frequncy converter or
rewinding all motos or chang all motors
thanks
Answer
Is This Answer Correct ? | 1 Yes | 0 No |
why battery dc voltage become Half when we check with
respect to ground for example 120volts + and - terminals
and when we check + terminal with Earth thats 60volts why
60volts same result on 24Volts and with ground 12Volts only
expert answer that thanks
we can not ground the battery.
Answer
Is This Answer Correct ? | 0 Yes | 0 No |
Question { 4206 }
In a incandescent bulb, if the glass is punctured, and then
power is supplied, the tungsten filament blows up with a
flash.Why?
Answer
Is This Answer Correct ? | 2 Yes | 1 No |
Question { 3146 }
how to calc. current for 5MVAR,50hz,33kv
Answer
Is This Answer Correct ? | 5 Yes | 3 No |
Question { 4204 }
what are the reasons for overheating in electrical machines?
Answer
Is This Answer Correct ? | 0 Yes | 6 No |
Question { 35884 }
What happen when the AVR of the generator fails? Will it cause
power instability and total failure of the alternator?
Answer
Is This Answer Correct ? | 1 Yes | 0 No |
Question { 35884 }
What happen when the AVR of the generator fails? Will it cause
power instability and total failure of the alternator?
Answer
Is This Answer Correct ? | 0 Yes | 0 No |