Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the location of lighting switch of battery room

1 2926

how many percent setting of motor over load relay of its full load current

6 9528

i want to do a project on PLC.... please give me an idea.....

1 2096




what is the diff b/w HP and KW

10 7880

how many amps in 1KVA?

TATA,

16 82915

how to amps calculate from 1KVA?

11 19916

what is meant by earth fault and how it happens....

3 27971

what ll happen to current if two phases get short circuited

Kirloskar,

2 6646




how many amps in 1 KVA? V=440v, PF=0.8 and FREQ=50Hz

22 27501

A three phase load, around 4 km away from the 11/0.433KV distribution transformer (Neutral of Transformer is solidily earthed) and consisting of mainly very costly and sensitive electronic equipments is giving trouble due to high voltage difference between neutral and body earth. Whether this problem can addressed by connecting neutral at the load point solidly to earth?

3 2945

On load tap changer (OLTC) explode? Transformer Vector group: Ynd11 Rated Power: 353MVA Rated Current: 693A Voltage:294/20KV OLTC Type: T III Y1000 110/c 12193w Max Operation Current: 295A Step Voltage: 550V Arrangement in Tx windings: Y Connection Problem: Damage of Unit 1 Generator Transformer On Load Tap Changer (OLTC) Description of Incident: 9.00 a.m. :- Generator No Load test on excitation system started 10.30 a.m :- Carried out AVR change over test 11.30 a.m :- Preparation for Generator Manual Synchronizing test 12.00 a.m :- Manual Synshronizing test started. Observed incoming generator voltage higher than running voltage. CECR operator operated Generator Transformer OLTC to bring down the incoming generator voltage 12.03 a.m :-Generator Transformer abnormal alarm operated at Gen.Control Desk (CECR) CECR operater at Generator transformer bay informed that the transformer oil splashed out from OLTC. CECR operater informed that he heard explosion inside OLTC. Observed Oil level & Oil Flow alaram operated at Tranformer local annunciator. 12.05 am :- CECR operator 'Open Gen Field Breaker” 12.10 a.m. :- Elec1 team inspected the OLTC and found the OLTC rupture disk was broken and oil spilled at OLTC area. - Elec1 found the OLTC top cover bulging. Do anyone know why and possibility cause happen in this OLTC.

9 13439

Is it posssible to obtain the higher speed(3000rpm) for adiferentiallly cascaded induction motors(with 8 and 6 poles)

3 1925

what deffrence between KW $ KVA ?

7 5251

why transformer rated in KVA not in KW ? we know that W= v*i

6 4557

What do you mean by Frame 5 Gas Turbine as well as Mark II.

1258


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Un-Answered Questions { Electrical Engineering }

what happen when we add mentos in cold drink?& why?

721


WHAT ARE THE DATAS REQUIRED FOR PROTECTION AND METERING AND CONTROL AND LOGIC PREPARATION,HOW TO STUDY THE PROTECTION AND METERING?

758


working principle of AC Servo Motor with its construction

7433


my project load is 6 MW so please suggest the size of cable.. ALU 3c 400 aqmm cable can be sufficient.. is there any thumb rule for calculation of cable size please help me

425


how to calculate the capacitor to maintain power factor?

830






if flux and load static in dc motor and supply voltage increases 20% then what happened in speed

603


what is the meaning of 5% droop or 7% droop in AVR?

1061


boiler is running in rankine cycle and deisel generator is....?

753


diameter of cable and core is doubled then the value of capacitance is

1889


HOW MUCH CURRENT DOES SYNCHRONOUS MOTOR TAKES AT SYNCHRONOUS SPEED IN NO LOAD CONDITION ?

655


which protection used in power plant?

744


IN induction motor pf is increased using capacitors.what will be the effect on motor and system when very large capacitor is accidently installed and pf goes leading.

785


In motors how many types of cooling systems were used?

822


Anybody know how schematic diagram for reverse power relay? RPR for generator protection

824


1.what is mean by 8/20 micro sec waveshape

835