what is formula in determining the size of Circuit Breaker
for transformer with the following specifications. 7 units
of 1600 volts (primary) and 400 volts (secondary). Both
Primary and Secondary will have a circuit breaker which is
SF6. What should be the Switchgear Main Breaker Size anf
the sizes of each brances Circuit Breaker for Primary.
why supervision relay is used in incoming feeders?
transformer 3 ph, 225 kva pri 480v, sec 208v. primary neutral connected to system, is secondary neutral to be grounded and how
how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc
WE HAVE A PROBLEM THAT THE MAIN DRIVE OF OUR CEMENT MILL HAS AN EARTHING PROBLEM?TWO OF STATOR WINDINGS INSULATION HAS BEEN COLLAPSED DUE TO AGING PROBLEM.THE PHASES HAVE BEEN BYPASSED AND NOW THE LOAD HAS BEEN INCREASED.WE CAN'T REPLACE THE MOTOR.KINDLY HELP ME BY GIVING SUGGESTION THAT HOW TO MAINTAIN THE STARTING TORQUE AND CURRENT FOR HIGH LOADS.
why capacitor do not switch ON the DG power? (I had checked, capacitor ON in DG power that time current rating was reduced.)
WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.
What is different between MCB & MCC & isolator switch
What is Control & Relay Panel? And Remote Control Center?
Advantage of LT panel vs HT panel ?
I've heard that most of the substations are rated in multiples of 1.11 because of form factor.What is form factor?
What is the fuction of UV & how it works in circut breakers? is it one type of relay?
how to find ratio of CT & PT in 66/11kv 12 mva supply system ? explain with calculation.