How does a VOLTAGE OPERATED DIFFERENTIAL RELAY work??
Answers were Sorted based on User's Feedback
differential relay which operates on two or more similar
quantities i.e voltage,current.
in this relay under normal condition, no voltage flow
through coil i.e vi+v2=0 but in abnormal the differnce of
two voltage i.e v1+v2 will not equal to zero. so that
voltage will flow through the coil further protection of
equipment/devie/system etc.
Is This Answer Correct ? | 4 Yes | 5 No |
Answer / akhilesh
suppose pri side of pt(3 no's) is connected to any 3 phase
winding n sec of pt is open delta or connected to relay. in
balance cond Vr+Vy+Vb=0 n under unbalance cond not equal to
zero.so that some current fkow through sec of pt n relay
operates
that is ans
Is This Answer Correct ? | 3 Yes | 6 No |
what are check points to be checked while charging switchyard?(CT,PT,BREAKER,POWER TRANSFORMER)
diff between UPS and inverter?
Generally the incandescent lamps in bathrooms fuse due to high voltage at night.What is the simple solution of this problem?
What is the difference b/w earthing & grounding?
What is the permissable nutral current of three phase system as per IS standards?
30 kva ups may kitne output voltage hote h
Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?
want happens when a dc is given to a commutator
What is magneto on a gas generator. how it functions. its out put is d.c or a.c. how it can be checked for correct functioning
what is the long transmission lines
Q) Write VBscript code along with QTPscript code in QTP tool for below scenario 1. Launch yahoo site(i know) 2. Do loogin(i know) 3.Click inbox link(i know) 4.Go to every page of mail box and count no.of read mails and no.of unread mails(i know) 5.Store page numbers, read mail count and unread mail count in a new excel file sheet 6.Create 10 types of graphs on that data 7.Do logout and close site(i know) 8.Save new excel files with graph
Types of circuit breaker