how did the differential relay work to protect the power
transformer
Answers were Sorted based on User's Feedback
Answer / vishal
differential relay operates when the phasor difference of two or more electrical quty exceeds a pre determined limit.
in case of power transformers the vectors compared are the current entering and leaving the winding
..if the current entering is more ,indication of fault and relay operates
Is This Answer Correct ? | 13 Yes | 1 No |
Answer / vasim
CT connections from primary side & secondary side are
connected together in the differential relay if there is
any difference current or fault current flows there above
the preset time & value of current than the relay operates.
Is This Answer Correct ? | 5 Yes | 1 No |
Answer / ashutosh
in differential relay we use to the differential principle
means in it we compare to the similar actuating Quantity.
Differential relays are used to determine the inter turn
Fault
Is This Answer Correct ? | 4 Yes | 6 No |
Differential relay will operate with differential current between phase and neautral of the generator. it is operated with CT CONNECTIONS
Is This Answer Correct ? | 2 Yes | 7 No |
how we calculate the withstansing current capacity of wires&cables?
while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends
define ac reactor? thier application;
which type of capacitor store high amount of energy for long time ? ( polarized or unpolarized )
Why in medium voltage system(3.3kv to 33kv, neutral is earthed with either resistance, reactance or neutral grounding resistance?
IN A HT CABLES i.e. 1.9/3/3 kv, what is the meaning of 1.9 and 3.3.
Welding machine
What are the advantages of speed control using thyristor?
what is difference between speed mode and torque mode in motor?? explain in simple words please.
Why do not we prefer non conventional sources of energy to conventional sources?
if the back emf eqution for dc motor EB=(QPNZ/60A) THEN what is the value of A for PMDC MOTOR OR how can dicide the value of "A"
WHAT IS VFD,FUNCTION, PURPOSE,