Answer / farhan hashmat

ELCB mean earth leakage circuit breaker,and it is the old
name of RCCB(Residual current circuit breaker, further ELCB
is voltage depended operation and RCCB is current depended
phenomena.and MCB is miniature circuit breaker which is
operated on thermal or magmatic effect of current.

Answer / guest

ELCB

Hi, I've just got into my electrical engineering course and I need some help with a question of mine here. During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz. From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.

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