difference between local breaker backup relay or backup protection relay ?
- 1 Answers
- 2083 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
LBB relay is for failure of breaker to trip , and back up protection relay ( usually EM ) is for failure of main relay ( usually electronic )
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Write the analogous electrical elements in force voltage analogy for the elements of mechanical translational system.
How to know about the rating(voltage and other) of induction motor if its name plate is missing at the manufacturing site.
how mass curve differs from hydrograph.
my question is how to answer the question "you are from b.tech eee background and why do you want to go for banking
Why the output of OP-AMP is always less than Vcc?
calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.
i am an maintenance engineer. one distribution board have 5 feeder. recently its ELR trips frequently, but it take some times after trip( 10min,20min..)but 3 feeder no load. two feeder only loaded. i checked one feeder IR value all values are above 50Mohm.but B phase to Earth is only 9Mohm.any problem about low value
what is PID control in VFD drives?
'documenˁ
direction of tarbine& genrator
In ACS 1000 drive we are using 12 pulse converter,why don't use 3 pulse converter.
when qty of cable being purchased is not sufficient according to the standard,what should the inspector do to ensure its quality according to the standard?
A cylindrical wire is compressed in length by 10%. The percentage decrease in the resistance will be?????
How short circuit MVA(Fault MVA) in a power system calculated for calculating number of earth plates ?
What is inrush current? how can calculateit? what is the affect of it?
