which is batter in construction job,ELCB or RCCB?

Answer Posted / s.saravanan

--> RCCB is better than ELCB...
--> ELCBs senses the fault current flowing through the
ground only...
--> But fault currents can still flow through other
conducting elements such as an adjacent conductor which is
unenergized and whose insulation is incidently got damaged
and coming in contact with the conductor which is live and
its insulation also got damaged...
--> In this instant fault current flowing through the
ground is nil and the ELCB fails to sense it...
--> But RCCB works in core balancing technique and
therefore any difference in current flowing in through a
Line conductor and current flowing out of the neutral
conductor during faulty conditions will be sensed by the
detector coil and trips the circuit...
--> Let us widen our knowledge over the fault currents
since fault current doesn't flow only through ground but
also in some other unplanned paths...
--> Hope my answer will be more convincing to all...
--> All the best...
--> Have a nice day forever...

Is This Answer Correct ?    13 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why we are using earth pit in sub stations.?

1552


why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

1725


33kv Rated output avilable in market (any where in india)

1619


how can maintaince the acb contactor moveing and fixing kit

1583


How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?

1745






how technical is calculated in 11kv line and lt line

1455


A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

1575


How to calculate multiplying factor of dc energy meter

1201


What are the types of windings according to the construction?

596


Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

1570


wish of these transformer uses oil?

1161


I am using submission of two ct in one and half scheme for 67/67N protection. Both CTs star point is grounded separately near ct box.Will two point ground give wrong tripping to 67/67N during fault or no matter.

1643


How can we design a HVAC Plant room which includes AHU,FCU,Chillers,Cooling towers, Pumps etc & how will they work? any Drawing if possible?

1862


Draw a SLD of HT distribution EB grid up to users Transformer?

5648


What is the importance of counter based plan & how is it scheduled?

1558