Answer / vivek

open and short circuit fault is commonly cheked by megger.
earth fault also checked by megger or multimetter.

Answer / gulshan goyal

MAINLY THERE ARE TWO TYPES OF FAULTS SHORT CIRCUIT AND OPEN
CIRCUIT FAULTS.IN SHORT CIRCUIT FAULTS WE STUDY ABOUT
SYMMETRICAL AND UNSYMMETRICAL FAULTS.THE THREE PHASE FAULT
WHICH IS RARE MOST SEVERE FAULT IS SYMMETRICAL FAULT.AND
LL.LG ,LLG ARE UNSYMMETRICAL FAULTS.By performing short
circuit MVA analysis for positive, negative and zero
sequences, symmetrical three phase
and unsymmetrical phase-to-ground, phase-to-phase and
double phase-to-ground fault currents can be resolved.

Answer / mahaboob

plz send correct answers

Answer / monalisa rout

unsymmetrical faults,symmetrical faults,ground-to-
ground,line to ground ,nline to line and megger is a unit
to measure it.

Answer / barkha jha

Above answer is very correct
i want to add some value
for short circuit protection we use fuse as primary
protection & overload load relay for backup protection
for earth fault- we check phase to ground insulation
resistance,in case of earth fault its value comes to zero
For open circuit - check the continuity of supply

Answer / ankit goel

in addition to above ans i would like to add that for earth faults core balance transformers can be used.

which tap of the transormer you will use in critical condition(worst)?

1 Answers  

What will happen to transformer if we gave 5HZ input instead of 50/60Hz??? explain with reason

2 Answers  

why test lamp didn't glow across 500v megger?

4 Answers   Aurobindo,

minimum ohm for lighting minimum ohm for Earthing

3 Answers  

what is Aircraft earthing and what does it do?

6 Answers  

what is grounding & what is the value of groumding rod 2.5m?

3 Answers  

what is potentiometer & rheostat

3 Answers  

why connecting surge unit in contactor coil

0 Answers  

6. A DC AMMETER HAS R=0.1 OHM & CURRENT RANGE IS 0-100 A IF THE RANGE IS TO BE EXTENDED TO 0-500 A THEN METER REQUIRES SHUNT RESISTANCE OF ..........

2 Answers   SSC,

Require Generator Capcity ( KVA ) for 3 Phase Motor having 4.7Kw with starting current of 16amps?

1 Answers  

what is the purpose of reactor in electrical substations ?

2 Answers  

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

0 Answers