Answer / sanju

ELCB:-An ELCB is a specialised type of latching relay that
has a building's incoming mains power connected through its
switching contacts so that the ELCB disconnects the power
in an earth leakage (unsafe) condition.The ELCB detects
fault currents passing from live (hot) to the earth
(ground) wire within the installation it protects. If
sufficient voltage appears across the ELCB's sense coil, it
will switch off the power, and remain off until manually
reset. An ELCB however, does not sense fault currents
passing from live to any other earthed body.

RCCB:-A residual current device (RCD), or residual current
circuit breaker (RCCB), is an electrical wiring device that
disconnects a circuit whenever it detects that the electric
current is not balanced between the phase ("hot") conductor
and the neutral conductor. Such an imbalance is sometimes
caused by current leakage through the body of a person who
is grounded and accidentally touching the energized part of
the circuit. A lethal shock can result from these
conditions; RCDs are designed to disconnect quickly enough
to mitigate the harm caused by such shocks

State four criteria's for selection of site for nuclear power station.

1 Answers  

---

When will you multiply and devide with derating factors to the actual value while sizing the cable?

0 Answers  

---

Why front mounted CT polarities are always towards breaker?

0 Answers  

---

in electrical fire which group fier Extinguisher as used

6 Answers  

---

For two systems transmitting the same amount of real power, the system with the lower power factor will have higher circulating currents due to energy that returns to the source from energy storage in the load.???

0 Answers   Bhel,

---

Pls anyone explain me the basics of wiring a house?

3 Answers  

---

what is the importance of fault level in power system and how is it decided

2 Answers  

---

how much allowable resistance that can be difference in motor all coils?

0 Answers  

---

how can calculate 1kva generator running time in 1 liter keroscene

0 Answers   Kirloskar,

---

What is Form factor?

2 Answers   NTPC,

---

why is electricity produced and distributed in multiples of 11. 440V, 11KV, 22KV, 132KV etc

2 Answers   Bhel,

---

The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?

0 Answers  

---