Answer / wenceslaus hhindo

The deffence between RCCB and ELCB is that RCCB is one
which can detect a direct contac between live and live or
live and nutral while ELCB is an electrical divice can
protect and trip when the live contact with frame or there
is direct contact of live to ground.

Answer / k.prakashchandra

RCCB is based on current balancing.The phase and neutral
wires are taken through it.If there is earth fault current
RCCB will act as this current does not pass through it,
causing imbalance.In case of ELCB the earth wire is taken
through it and it will act if there is any current in the
earth wire.Nowadays RCCB is widely used and it is wrongly
reckoned as ELCB.

Answer / manish kumar

ELCB detects fault current passing from live wire to the earth wire within the installation it protects. if sufficient voltage appears across the elcb sense coil. it will switch off the power.
RCCB whenever it detected the circuit load unbalanced from r y b phases.

Bhel supervision exam question: If 2 generators are working in a network. And if suddenly the field of anyone generator weakens. What will happen in the network? 1. The generator will run as motor 2. The generator will run as motor in reverse direction 3. The generator will take lighter load 4. The generator will take more load

9 Answers   Bhel,

---

What is VFD, and how its work

5 Answers  

---

1)we r having one problem .one dry type transformer(6.6KV/433V)is taking high magnetizing current on delta connected HV side of "U" phase when compared to other two phases.could any body tell the reason why it is happening? 2)why CT secondary side protection core has got higher winding resistance when compared to that of metering core of same CT?

2 Answers  

---

HOW MANY EARTHINGS REQUIRED FOR GENERATER

10 Answers   Juniper Networks,

---

what are trouble functions of transformer?ex. prv trip,oltc,oti,wti.explain detail.

1 Answers  

---

---

With a phasor diagram show the effect of increasing the field current of a generator supplying a constant real power and connected to a grid system.

0 Answers   VECL,

---

WHY DIODE IS CONNECTING ACROSS SWITCHES

5 Answers  

---

In a 3 phase system a neutral exists so that any unbalanced currents can flow through it towards earth.... but a phase demands a particular current as per the load attached to it....then where does the extra current come from the goes in the neutral??....I mean in an unbalanced system a phase demands a current as per its load attached....then where does the unbalanced current come from??

1 Answers  

---

different between grounding & earthing?

23 Answers   L&T,

---

What is the armature mmf in a D.C machine?

0 Answers   HPCL,

---

If the generator will trip, what you will do as an electrical technician in charge.

1 Answers  

---

Define protection core in CTs Ex. 5P10, 5P20 etc.

1 Answers   HPL,

---