what is diffential relay? testing proceure?and
transformer reach Over load thet time differencilal relay
operate or not ?
- 5 Answers
- 7605 Views
- I also Faced
- E-Mail Answers
Answer Posted / m raviteja
differential relay is the difference of current from
primary and secondary of the transformer.Normally setting
is at 0.6% if more than that the transformer will tripped
on that relay fault.
the primary current and secondary currents are connected to
individual ct's and that terminals are connected to relay.
differential relay is of two types voltage based and
current based.Normally current based is used in industries.
testing procedure:both primary and secondary currents are
induced to relay and make the required setting if current
difference is more than that the relay acts.
differential relay will not operate when overload the
transformer unless the difference in primary and secondary
currents
| Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
What is current divider rule (cdr)?
Where voltage are high and current to be interrupted is low the breaker preferred is:
what is the current density of copper & alluminium.
I AM GOING TO ATTEND APTRANSCO ON 26TH OCT 08.PLEASE SEND ME ANY MATERIAL OR TYPE OF QUESTIONS OR EXP QUESTIONS.
how much LT load can bear by the 100 KW HT connection.
What is the difference between Static and servo controlled voltage stablizer?
how to calculate earth fault relay current and CBCT ratio
diff b/w elcb and rccb
DG Earth Value?
Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?
How does a transformer contribute towards the widespread popularity of ac system over dc?
what is deffrence between squirral cage and wound rotor in IM?
DRAW ACIRCUIT DIAGRAM OF 100 KVA 415V/55-0-55V DELTA TO STAR TRANSFORMER
What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?
can anyone give an idea about dia calculation in cold rolling mill
