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

Which motor will you choose which can operate in both lagging as well as leading power factors?

0 Answers   HPCL,

---

what is data block in plc ? How the values of data block are written and read by hmi ? what is the difference between function and function block ?

0 Answers  

---

Hi.I want to ask how to calculate contactor rating current? for example I have 460 V , 100 A (induction motor) calculate contactor rating current?

2 Answers  

---

1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.

0 Answers   ICS Integrated Computer Solutions,

---

what is the difference between directional & non directional earth fault with example please explain.

0 Answers  

---

---

why we use choke in tubelights nad other lighting fixer

1 Answers  

---

What are n circles?

0 Answers  

---

how could we calculate the no of outgoings from a 800 watt distribution board

0 Answers   United Engineering,

---

what kvrah y we need to take the readind of that

0 Answers  

---

why three phase system is not preferred in aircrafts power cckts if yes than explain reasons?

3 Answers  

---

some basic standard questions on transformer.

0 Answers   United Engineering,

---

Which protection detects both AC and DC?

3 Answers   Megatron Solutions,

---