A wire pilot is generally economical for distances up to 5 or 10 miles, beyond which a carrier-current pilot usually becomes more economical.
Related Question
MCCB stands for Moulded Case Circuit Breaker.
MCB stands for Miniature Circuit Breaker.
ELCB stands for Earth Leakage Circuit Breaker
RCCB stands for Residual Current Circuit Breaker.
P = 10 kW
VL = 400 V
IL = 20 A
3- phse power, P = √3*VL*IL*cosφ
cosφ = 10*1000/(√3*400*20)
= 0.7216
In single phase energy meter,
Current coil is made up from thick wire having few no. of turns.
Pressure coil is made up from thin wire having more no. of turns.