Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is different between Difnit time and instatous over current relay

NCC,

1970

an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

1 1734

is synchrnous pannel is need for two eqal rating transformers to run in parallel

1 2817

How to calculat the ratio of HT\LT in energy meter

2104

What is difference between SMC supportg and Glass Fibre Reinforced Plastic Support.

1844

what is the highest voltage for transmitting electrical power in india

5 6516

how rectifier transformer work in electroststic precipetatore(esp?

2084

how to calculate current carrying capacity in power cable?

1 4427

checking procedure of capacitor based motors.used in fans etc?

Badve,

1599

draw tube light circuit

Badve, KPTL,

1809

I have a 5KVA UPS. Total load to be connected almost 3KW. Ordering a battery pack with capacity of 1920VAh. How long will the backup time be?

1 3449

why in a transformer frequency remains constant? if frequency is changing what will happen?

5 21568

SUTIABLE FOR ohm's law super conductor

1508

if the synchronizing b/w generator and busbar not complete and we close the out going circuit breaker of generator then what happen ?

4 4045

diffrence between windings of high tension side and low tension side of transformer

1 10085


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

What are the basic properties of signal flow graph?

677


Is there any Institution for giving M-tech in Electrical engineering for those who r in service? Give the details please.

1556


What is the working principle of servo motor? And explain it.

1397


what is capacitor voltage transformer?? how it is different from potential transformer?

1679


pls tell me function of closing coil of A.C.B.

2876






Why using synchronising methed in DG's sets?

1708


How npn and pnp transistor works

628


Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

980


if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.

1119


What is the lockout relay

1049


WHAT IS THE FUNCTION OF SHORT CIRCUIT MAINTENANCE CT

2010


Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction

2459


hi friends how 3 phase converter functioning ?what is working principle of rotory phase converter ?

1610


WHAT IS DEGREE OF COMPOUNDING IN D.C MACHINE MEANS? HOW TO READ THE OPERATING CHART FOR ANY ELECTRICAL MACHINES?

4257


Dear all, how we select the cable size according  to current with or without including different correction factor , is there any direct method for sizing of cable... 

1692