Answer / waqa ahmed

mcb
miniature circuit breaker
mccb
moulded cage circuit breaker
elcb
earth leakage circuit breaker

Answer / g.t.manikandan

MCB is miniature circuit breaker which is thermal operated and use for short circuit protection in small current rating circuit,Normally it is used where normal current is less than 100A,
MCCB moulded case circuit breaker and is thermal operated for over load current and magnetic operation for instant trip in short circuit condition,Normally it is used where normal current is more than 100A.
RCCB is used to detect earth leakage fault.once there is a ground fault in the load side,current from phase will directly pass through earth and it will not return through netural through RCCB,that means one side current is going and not returning and hence beacuse of this difference in current RCCB will trip and it will safe guard the other circuits for fault loads,that why cost of RCCB also costly

Answer / dixit

mcb
is a circuit protecting device which has a definite current rating which protects selective rating of the MCB which we choose.

MCCB
is also a circuit protective device we can change minimum to maxium value of current rating which can select .

ELCB

which sens the leakage current if any in the circuit,and trip the circuit immediatly

how dg's working of 1000kva.

1 Answers  

---

can i use 10 mfd + 6 mfd instead of 15 mfd capacitor in single phase motor as running capacitor

3 Answers  

---

In case of 11kV dual delta bank what are the recommended protections with specific CT / VT requirements? The capacitor bank is to be connected to the main 11kV switchgear from where the H.V.Motors and auxiliary 440V loads.

1 Answers  

---

what happen when we add mentos in cold drink?& why?

0 Answers  

---

How REF protects transformer alone? explain with diagram.

0 Answers  

---

what is meant by bus bar and outgoing/incoming breaker in an electrical/electronic circuit

3 Answers  

---

what is the mean of short circuuit current ( for ex. 50KA)?

2 Answers   Weltech Engineering,

---

I am an American living in Vietnam and I have recently gotten a refrigerator from Japan and it is rated for 100 vac, but the power here is 220 so I bought a voltage stabilizer it has a 1 kva output rating. Can you please tell me what the amperage is? I'm confused and without a working fridge.

0 Answers   BSL,

---

can we use ac ameter as dc ameter with ct

1 Answers  

---

if i conncet ct with ct ratio of 600/5 to an energy meter having ct ratio of 100/5, the reading show by the meter will correct, if wrong is there any method to calculate correct value with shown value, if yes please state it.....

2 Answers  

---

what is mean by descripiency relay? & wht is its ansi code?

0 Answers  

---

How much amps carry in single phase R-phase,in D63A 4-pole MCB

1 Answers   TCS,

---