Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / guest
ELCB is basically voltage operated tripping mechanism.When a
voltage exists between the earth and frame the tripping coil
is activated.If the earth connection is bad the tripping coil
will not operate.
RCCB is an improvement of the voltage operated tripping
mechanism.This is current operated. If the leakage current is
of the designed minimum amount the tripping mechanism is
activated.So if the earthing connection to the ground is bad
but the leakage occurred through a person to the ground the
RCCB will still trip.
| Is This Answer Correct ? | 11 Yes | 4 No |
Post New Answer View All Answers
where was current transformer protection units used and why??
Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.
what are the different sizes of U.G. cable & where these cabl;es are used according to voltage ..
what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....
What is the abbreviation of NGT panel
How to maintain ac plant?
Compare salient pole and cylindrical rotor machines.
HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.
Difference between megger test equipment and contact resistance meter test instruments?
How to calculate no of EARTH PIT? Describe the formula as per IS standard?
i want some interview related questions with their answers which can help for attend the interviews...
What is PEC??Applications........
we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?
What happen when change order of CT in GIS feeder?
what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:
