Answer / suthanprabhu

1.Body earthing
2.Neutral earthing
3.Winding Temperature
4.Over current protection
5.Over/Under voltage protection
6.Over/Under frequency protection
7.Earth fault protection
8.Reverse power protection
9.Loss of field protection

Answer / j.suresh

BODY EARTHING
NEUTRAL EARTHING
OVER CURRENT PROTECTION
OVER / UNDER VOLTAGE PROTECTION
OVER / UNDER FREQUENCY

Answer / indrajeet

1.Body earthing
2.Neutral earthing
3.Winding Temperature
4.Over current protection
5.Over/Under voltage protection
6.Over/Under frequency protection
7.Earth fault protection
8.Reverse power protection
9.Loss of field protection
10.Bearing Temperature
11.Loss of Exciation
13.Neutral current maxium.

Answer / uday

AVR

Answer / pradeep bhadouria

safety measure of alternator are
a) over current relay
b) over voltage and under voltage
c) reverse power relay
d) low frequency

Answer / maruthi

1.Body earthing
2.Neutral earthing
3.Winding Temperature
4.Over current protection
5.Over/Under voltage protection
6.Over/Under frequency protection
7.Earth fault protection
8.Reverse power protection
9.Loss of field protection
10.Bearing Temperature
11.Loss of Exciation
13.Neutral current maxium.

Answer / shanker

AVR,CT's, PT'S

Answer / rahul

Overcurrent trip
Overvoltage trip
Under voltage trip
Over frequency trip
Under frequency trip
Reverse power trip

Answer / munesh prajapati

avr
under/over voltage
reversr power

Answer / lohithkumar

RPR relay( Reverse power relay)
Over speed relay.(OSR)
Over/Under voltage protection
Bearing tepmerature relay. (BTR)
Winding temperature relary.(WTR)
Over current relay (OCR)
Auto voltage regulator relay.(AVRR)
Earth leakage relay.(ELR)
Low lube oil temperature relay.(LLO)
High water tempreature trip relay.(HWTTR)

for 100 HP Induction motor service factor is 1.2(SF) we placed a VFD at the motor side load is balance with 0.3 Amp's Phase to Phase but at incoming of VFD load is un-balance with 10 to 20 Amp's what will be cause of load un balance

0 Answers  

what is our body resistance value?

11 Answers   Bhel,

how can I improve the current at same voltage? if yes is there any circuits?

2 Answers  

speed of an electric wave

3 Answers  

I am applying for NTPC examination.Can we please provide previous paper to my mail prasad.chintala108340@gmail.com

0 Answers  

If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??

0 Answers   Jindal,

derive the formula of amp hours is calculated for 12v battery.where no. of plates is given

1 Answers  

is this the formula of building wiring to get the main breaker.Watts/volts*.8%+higher motor*(25%)=ampere. yes or no or send the correct formula for building wiring.

0 Answers  

Are Refrigerators & Deep Freezers the Inductive load ? How to calculate the Power Factor & hence the Output Power for them ?

0 Answers  

why neutral can not used in three phase motor connection?

1 Answers   HSL,

I am interested to know what does 15 KVA DG set actually means? If I dont know the DG rating, is it possible to identify KW by simply knowing the diesel consumption?

0 Answers  

what is rated current and operating current?

1 Answers