Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to calcute the cable size for both HT and LT please specify the formula for that Regards Chethan C

Bhel, Student,

720

What is the meaning of CT 40/5, 100/5 or in HT lines 100/1 ????????

Amex,

3 17838

how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?

1443




What is fuction of NGT/NGR using in Generator.

9 32127

How many types are using in 220kv/400 kv swith yard

943

Can u tell me design of switch yard

NTPC,

835

How i can decide that HVDC line is best for transmission.

672

WHY FLEXI LINKS ARE USED INBETWEEN GENERATOR TERMINAL OUTPUT & BUS DUCT CONDUCTOR.

3 3077




why we r used APFC Panel in industrial area.when P.F. low then wat will be the effect in our system?

Piramal Healthcare, ABB, Zenith Engineering Corporation, Georgio Rocks,

10 30137

why we are used D.c. voltage in L.T.side or controling side.we can use UPS also ,in place d.c. voltage

ABB,

5 4569

why protection and metering CT's are always connected in star why not in delta?

Reliance,

5 7991

how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.

685

If any one's require of phoenix contact like( relay , termilnal block , surge protection device ) , product please contect me 09878206357 chetan verma

758

where this neutral connection goes after returning from the load(home ,factory,industries).Is it grounded at the transformer side or atthe generator side .If it is grounded then we also ground the earth connection.is there any problem with this.

IOCL,

1 929

why the difference arise between HT reading & LT reading (submeters fixed in complexes, apartments etc)if the power factos exceed from 0.9 to 1 can the ht meter reads fast?

945


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Un-Answered Questions { Electrical Engineering }

what is the difference between changer, converter and transformer?

129


Differenciate between circuit wiring and sub main wiring with illustrations

930


What was the Dg set radiator and lube oil temperatures trip in ACB

439


what is parellel power factor correction?

1965


what is the star delta connetion and how can do it a three phase motor with control witing with picture

928






please send me previous year questions of jspl through which i could prepare myself for the test.

568


what is mean by parallel operation of permanent magnet generators

635


how to calculate vfd o/p voltage by frequency

857


IF I USED VVVF DRIVE IN FAN APPLICATION MOTOR IN 6.6 KV ( 700 KW) MOTOR & DURING NORMAL RUN OPERATION TIME IF RPM SUDDENLY REDUCE IN MOTOR BY DRIVE(E. MOTOR RPM REDUCE SUDENLY 687 TO 550 RPM) WAHT WILL BE HAPPEND IN DRIVE

1075


Installation resistance for whole installation of 16 kva & 25 KVA DTRA a) Between each conductor b) between conductor to earth c) installation resistance for each apparatus, each conductor to earth d) earth resistance for the system of earthing

596


How to Calculate the Fault Level of Electrical Installation

910


what is the difference between "Rotary bypass isolation switch and Normal bypass switch" pls share indepth techs?

690


draw 3 phase rectifier diagram

753


Why do we use copper cable for HT Supply and why not Aluminium?

677


What is a Phase shift meter? Where can I get one?

812