what is the std. earthing resistance for 440V system or
m/c, 33000/440 Volt substation? What is the std.?
Answer Posted / abdul wajid
The standard earthing for 440V system is less than 1 ohm ,
for 33000/440V the standard earth resistance is 5 ohm
| Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
What is the function of under voltage release ?
what is meant by poly phase induction motor ? how its operating by single phase or three phase?
What is mean 2XWY
what is earth pit , how we can measured it, what earth rods reference
pls tel me the electric train traction motors name plate details like rpm,torue,voltage,amps,watts..ect..
I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.
When is lag lead compensator is required?
Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............
what is the IS foe lightning arrester?
how we do Vector group ,magnetic balance and tap changer test in Transformer?
How to calculate the sag on transmission Lines.
when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)
HOW WE CHOOSE EARTH'S POTENTIAL AS ZERO V?
What do you mean by cogeneration? What its working principle?
In dc ckt. 24v or 110v, which one is more efficient and why?