How does a VOLTAGE OPERATED DIFFERENTIAL RELAY work??
Answer Posted / 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 |
Post New Answer View All Answers
how do you choose the cable size as per amps rating & the voltage drop for the same.
how we calculate the short circuit capacity of the busbar in LV & HT?
What is nyquist contour?
What are the weight of 800KV DA,DB and DC type tower ?
what is the meaning of the symbol << >> put in transformer drawing
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
how to get bearing & winding temperature of an induction motor?
how the CT and PT is connected in the circuit during testing of transformer explain with diagram
i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400
What is an automatic controller?
How to measure the earth resistance value in a concrete pavement(flood light area)?
What difference between ref protection and differential protection ?
What is a slack bus?
Define the term factor of inertia.
What will be the effect if I use inverter as UPS mood?