protection used for alternator , feeder , transmission line
- 3 Answers
- 9280 Views
- NHPC, Perfetti, I also Faced
- E-Mail Answers
Answer Posted / vinodh.t
fallowing protection are used for alternator
1.differential
2.negative phase sequence
3.over voltage
4.over current
5.thermal overload
6.under frequency
7.earth fault
8.over fluxing
9.over frequency,etc
feeder protection
1.over current
2.earth fault
transmission protection
1.over current
2.earth fault
| Is This Answer Correct ? | 29 Yes | 1 No |
Post New Answer View All Answers
I am an American living in Vietnam and I have recently gotten a refrigerator from Japan and it is rated for 100 vac, but the power here is 220 so I bought a voltage stabilizer it has a 1 kva output rating. Can you please tell me what the amperage is? I'm confused and without a working fridge.
HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.
the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?
Block diagram of Power line communication?
xpression 'document.FrmQF.myemail' [
Whata are the types of Cables?
I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?
What type of wiring series or parallel is used for conventional and addressable type FAS & why?
what is control supply rating of a machine
What is the different between conventional MCC and intelligent MCC? Common controller or controller for each bucket
Dear Sir I am living in Jaipur Rajasthan now I did complete my b tech degree in electrical engineering in 2012 Sir how I gate certificate of competency for electrical supervisor
i want bhel placement paper for electrical if anybody having pl send to my id kavitha867@myway.com immediately
send me all basic electrical question and answers
A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?
Meaning of ingrace protection for motor.for ex IPXY
