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Electrical Engineering Interview Questions

In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

PPIL,

838

how to operate and maintenance of 1500 kva diesel generator set

894

If I have Energy Meter Ratio as 100:5 & Also I have CT Ratio as 50:5 then what will be my multiplying Factor(M.F.)

978

what is FS cable?? Difference between FS and FRLS??

4268

What is speed mode?

786

what maximum range of star & delta in hp or kw ?

856

what is the difference between OSR and BUCHHOLZ relay of transformer?

2748

if i am in front of transmission line how to know that current direction without any equipment

862

i am completed diploma in ece,and working in ht and lt lines.so is elligible diploma in ece for get electrical C Licence?plse give ur opinion?

954

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

BSNL,

767

HCL,

846

what is difference between speed mode and torque mode in motor?? explain in simple words please.

733

If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V

796

How to calculate voltage drop in copper and aluminium cable? I have laid 240Sq.mm Aluminium cable for the length of 600 Mtrs in 1 Mtrs underground. Normal load is 150A. Transformer is 630KVA, 6.KV/433V. But, I am getting only 395 Volts when load. How to calculate voltage drop and what is the permissible voltge drop for this circuit?

1099

11kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?

821

Un-Answered Questions { Electrical Engineering }

whit is 33kv power 300*300 cable full current with formula

1003

I need the recommended size for a 3 phase transformer at 13.8 KV Primary and connected loads of 3000 kVA at 4200 volts and 2375 kVA @ 480 volts AC.

1076

What does ampere turns shows?

272

I FINISHED MY B.TECH IN EEE . I AM IN NEED OF A GOOD TRAINING INSTITUTE TO DO COURSES .. CAN ANYONE SUGGEST GOOD CENTRES IN TAMILNADU ,BANGALORE ,OTHER AREAS???????

1033

How will calculate losses in an multi core Aluminium LT cable of different sizes & upto what length we can use a LT Cable ?

1275

technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"

1201

ow can i get certificate of competency as electrical supervisor and my diploma in electrical engineering from jalgaon.

1473

What is meant by cold loop test in instrument

1714

What are the various kind of cables used for transmission?

264

Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?

776

Advantages of using generator circuit breaker (GCB) scheme in a power station ?

4199

Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com

1183

what is Fault level? why it is calculated? how will u decide same for our plant?

1137

11 kv input, 66 kv input advantages

474

How to set the relay,,??

1248