how to check the stabilty test for generator differential
protection
- 1 Answers
- 3287 Views
- I also Faced
- E-Mail Answers
Answer Posted / raghavendran
Checking of the pickup and dropout value
When checking the pickup value, the analogue input signals
of the single phase alternating test current have to be fed
to the relay via terminals.When testing the pickup value,
the alternating test current must first be lower than the
set pickup value.
Then the current will be increased until the relay picks up.
The value that can be read from the ammeter may not deviate
by more than ± 2.5% of the setting value. The tripping
values for the other current inputs should be checked
accordingly.
Function test
Disconnect all leads for adjusting the interposing C.T.s and
perform the following function test:
Load the generator with minimum 50% load. Assure that the
tripping of the generator C.B. does not cause un-wanted
damages (blackout).
To operate the differential relay use a shorting link
between one of the phase measuring sockets
and GND, e.g. connect Line to GND. The relay should trip
immediately. If no trip occurs, make sure
that the load current exceeds the set value.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
What are the advantages and disadvantages of open loop control system?
What is A check, B check, C Check & D check for a diesel Generat
How to detect voltage vector shifting in interconnection protection.
I am abt to give IOCL intrv.Plz sir guide me for IOCL intrvw (Electrical).Which subject to be consider. questions are generally asked from which subject.Plz help me out.
During Starter Panel Com missing I Found The Main Incomer 40Amp MCB 10KA Trip When Motor Change Star To Delta Motor Rating 20HP BUT When We Use Same MCB To Other Motor It Does Not trip Or What Is Necessaries for Star Delta Starter MCB SFU MPCB OR MCCB And What are The Breaking Capacity of MCCB in the Motor above 15HP
What is cut-off rate?
What is the meaning of loop in transformer
my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.
how to calculate the cable current ratingand and how much of distance the rating will be ok will the distance is incresed what the action we take
what is the major difference between LIBBP & HIBBP.. which one is most preferable..
which cable is used for 15 Hp monoblock pump 3phase and service wire Distance is 210 feet please tell me cable size Armaured
defult setting in p220 micom motor proction relay for 11kv,640kw,f.l.a.-40a,1440rpm ht motor?
Explain the advantages and disadvantages of thermal power plant?
The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?
Why negative feedback is preferred in the control system?
