Electrical Engineering Interview Questions
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How to synchoronize the generator (with gcb,GT) to grid????? ????? from Grid iam getting power (rated 400kv/20kv) through GT and its goes to UAT.,,ST.,, now my generator(rated 20kv ) ready.,, now iam closing my GCB.,, in GT iam suddenly giving 20kv on that Gt.,, what will happend

1541

what is the response time of relays when a FAULT OCCURS IN A POWER SYSTEM?

2 4037

What is the role of power pack in substation protection system?

Facor,

2171

why there is a high voltage line in multiplication of 11?i.e.- -66kv,11,kv,22kv

Bhel,

4 7752

how capacitor pass ac voltage practically?with increase frequency and cpacitance?

DELL,

1 3818

What is battery Amphere-hour? How the battery back up time period is calculated?

2 11097

What is Difference Between static & Dynamic Pressure of Fan & Blowers

2 10105

WHY IS THE NO LOAD CURRENT SMALL FOR A TRANSFORMER COMPARED TO OTHER ROTATING ELECTRICAL MACHINES??

1 3536

Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

2 3389

What is the real function of reverse power relay in generator panel while syncronising?

Triveni,

1519

What is the Minimum winding resistance of motors ( small & big)? referance range

TATA,

1756

What is core CT & it's function?

1520

A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?

1438

A 6.6 KV/ 440V Xformer. what are the imporatant parts & equipment required for it's protection panel.

APTransco,

1775

what are the main Parts of VCB

1 4414


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Un-Answered Questions { Electrical Engineering }

condition Autotrip facia come on control panel of electrical transmission line?

1014


i have 3500 amp load and select current transformer and perches.how i calculate .please understand

1649


What is the purpose of stablization resistor in high impedance bus bar protection

1458


What is the IS standard for MCCB to be use (As per capacity of AMP)& for ACB also.

1509


I PURCHASED A DEISEL GENARATOR SET OF AVR TYPE& RATING 125KVA BUT SOME TIMES THE OUTPUT VOLTAGE IS FLUCTUATING WHAT ARE THE PROBABLE REASONS GIVE ME

1331






What is the distance between body earthing and neutral earthing.?

3955


Why insulation level follows this order? transformer < bus bar < circuit breaker & Isolator < transmission line.

1622


What are the Full Forms of TVM, MTL, CVT ?

808


what is per unit calculation?looking for simple and strong explanation thk u

2370


how much allowable resistance that can be difference in motor all coils?

1754


BRIEFLY EXPLAIN THE STORAGE CLASSES AND THEIR TYPES IN C

1787


Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.

1227


Write the force balance equation of ideal spring element.

692


i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

775


As we know induction squirrel cage motor torque Directly praprortinal to applied voltage in star connection & delta also. If I connect 55KW Motor to DOL starter in load condition does motor withstand the load & what will be the current withdrawn ? motor will not fail ?

1334