if the synchronizing b/w generator and busbar not complete and we close the

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

Question Posted / sam

4 Answers
5320 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

if the synchronizing b/w generator and busbar not complete and we close the out going circuit ..

Answer / sheikh

if synchronization b/w generator and busbar would not be
completed and if you close the out going CB then generator
have gone to over current tripped or reverse power tripped

Is This Answer Correct ?

3 Yes

0 No

if the synchronizing b/w generator and busbar not complete and we close the out going circuit ..

Answer / hamuel vilho

the generator winding wire will become hot and get broken which lead to linkage and it will get damaged,NB it is very expensive to repair winding wire, never try to close the circuit breaker if they are not in the same phases, frequency,

Is This Answer Correct ?

1 Yes

0 No

if the synchronizing b/w generator and busbar not complete and we close the out going circuit ..

Answer / milinda4p

IF the synchronization does not complete and if you close a cct breaker a severe arcing may occur and generator will trip instantaneously. Because the Generator sides voltages and bus side voltages do not match. To match the volatges following has to satisfied.
1. voltage magnitude
2. phase angle difference - 0
3. phase sequence - same
So at this condition there might be present voltage or phase angles or phase position mismatches. Say for example there exists a voltage magntude mismatch of 1 kV and when you close the cct breaker contact points have that voltage across them and this will cause severe current through contact points of breaker

Is This Answer Correct ?

0 Yes

0 No

if the synchronizing b/w generator and busbar not complete and we close the out going circuit ..

Answer / kk

First of all check sync relay will not permit to sync due to control ckt configuration, perhaps if it did then gen bkr would tripped in reverse power (32P relay) acted.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

How many no. of earthing pits required for commisioning a new 320KVC DG Set????How????

6 Answers Emerson,

what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

0 Answers Suparco,

Why CT secondary should not be kept open?

7 Answers Anna University,

If a ACB breaker is tripping and closing problem, then what will we check internal..?

3 Answers

what will happen if i commission a transformer without connecting the neutral?

2 Answers L&T, Sail,

the 230 value of voltage which is use in our home . is that value is rms, aerage or peack value of voltage?

5 Answers L&T,

what happen when dc supply is given to the transformer

9 Answers Bhel,

CTs Ratio

2 Answers

how we can do the insulation on secondary of ct explain and so that tan delta will within limit

0 Answers

This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers

which metal use as a electrical shunt?

2 Answers

What does the term “voltage regulation” means?

0 Answers

For more Electrical Engineering Interview Questions Click Here