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Electrical Engineering Interview Questions

do we need NGR panel when the output of the genset is LV but after that it is step up to 22 kv. condition is 12 genset 400v are operating in parallel.

4107

132 KV TRFO BUSHING BURNT WHEN A 6.6KV HAS BEEN APPLIED TO IT .WHY .ANY REASON ?

MRF,

6795

Why is it that North America uses 60 hz frequency while Europe uses 50 hz?

6069

Why ACB is used in LT why not in HT and why VCB is used in HT why not in LT

GE,

19958

Name of the relay of low lub oil presuure in DG sets

1141

why most of the induction are delta connected?

5415

sometimes, eventhough the HV side of the transformer is opened there is a voltage in LV side .How is it possible?

4361

how can we calculate that how much capacitor is needed for a system to increase the pf?

5868

how will calculate the winding ohmic value in 3phase motors in h.p wise? ex.10 h.p motor winding value ph to ph ? 5 h.p motor any calculation please send me.

4334

what different in delta & star connection in motor?explain

10180

why the CT ratio secondary is always divided by 5 for eg( 75/5,80/5,50/5)

12179

what is the voltage present in the telephone?

7955

why do we connect droop ct{in gensets}in y_phase only

5403

HOW DG WORKS ?

14565

Does the dg syncronization sucessful in practical.

2757

Un-Answered Questions { Electrical Engineering }

1.what is difference in maintain Hz again Hz in USA ? 2.how to calculate the battery AH? 3.why are yearly maintained in transformer how many tests in required?

1694

How Calculet The UPS AH In Load

581

how do i commission a distribution transformer knowing all its ratings and transformation ratios?d

3213

What is step signal?

154

how power is generated,and transmitted to our home..pls explain briefly in simple words.

1287

If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.

1177

why the NGR (neutral grounding resistor) always OFF during DG off?

2588

1.4 What is meant by CT knee point voltage and how would you determine it

571

What is meant by stator? What is meant by rotor?

167

i am in need of AC SYNCHRONUS MOTOR 30KW. ANY ONE KNOWS THE MANUFACTURER OF SAME. ALSO MOSFET AC CONVERTER 20KVA CONT.OUTPUT.

1028

what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1006

how we calculate the withstansing current capacity of wires&cables?

1017

how to compute kvar in substation feeder to improve power factor and sending voltage

1202

what irequirment need to be followed when working on live equipment

834

What is the function of attenuator in cro?

187