Answer / saravanan.p

MCCB ( Molded Case Circuit Breaker) - This CB used to
isolate the fault circuit while fault current >63 Amps.
(<63 Amps, we use MCB [Miniature Circuit Breaker]).

RCCB (Residual Current Circuit Breaker) - This is an
electrical wiring device that disconnects a circuit
whenever it detects that the electric current is not
balanced between the energized conductor and the return
neutral conductor.

ELCCB (Earth Leakage Circuit Breaker) - It is a safety
device used in electrical installations with high earth
impedance to prevent shock.

Answer / parasu

All are circuit breakers
MCCB - Molded case circuit breaker.. its function is to
protect the equipmet from fault conditon with the guidline
of relays information.
RCCB/ELCB -Residual current circuit breaker / earth leakage
CB

If 3-Ph motor of same rating connected in Delta & Star for same load one by one then which connection take more current in running (not in starting)for full load.(eg 8.5 KW,3-Ph 400 V)

1 Answers   GE,

---

what are the settings is there for ABB REM543 Generator Protection Relay

1 Answers  

---

A cylindrical wire is compressed in length by 10%. The percentage decrease in the resistance will be?????

0 Answers  

---

I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.

0 Answers  

---

Why the standard of ambient teperature mentioned as 40 degree celcius in machines.

0 Answers  

---

What is AVR in Generators and How is it working.

4 Answers  

---

i have 400/230v transformer and didnt done the neutral eatrhing. i connected one lamp to one phase and neutral to the earth. but the lamp is not glowing. again i connected neutral to earth and repeated the same. then the lamp is glowing. in the first condition i tested with a line tester also, at that time the tesrer is glowing what is happening i dont know can any one help me?

1 Answers  

---

what is meant by re-rolling motor? how it differs from standard motor?

0 Answers  

---

Two electronic energy meters are connected to seperate phase wires, but connected to a looped neutral. Are these going to function correctly?

8 Answers   DRDO,

---

Efficient electrical earthing in hard rock area

0 Answers  

---

1. How many types of mangers? 2.How many types of capacitors? 3.pls tell me normally types alternator problems?

0 Answers   APCPDCL, Voith,

---

What is Diff. btw Cat-5 & Cat-6 Network Cables???

3 Answers   Emerson,

---