Answer / desingurajan

MCBs are miniature circuit breakers with optimum protection facilities of overcurrent only.These are manufactured for fault level of up to 10KA only with operating current range of 0.5 to 63 Amps (the ranges are fixed), single,double and three pole verson.These are used for smaller loads -electronic circuits,house wiring etc.
MCCBs are Moulded case Circuit breakers,with protection facilities of overcurrent, earth fault.it has a variable range of 50% to 100% operating current.They can be wired for remote as well as local operation both.They are manufactured for fault levels of 16KA to 50KA and operating current range of 25A to 630Amps.They are used for aplication related with larger power flow requirement.

Desingh
RAjapalayam

Answer / kadher.304

mcb its thermal operated and use for short circit rating of
mcb 63amp(max)
mccb is thermal operated for over load current and magnetic
oprataion for instant trip in short circuit condition.rating
of 63amp(9min)

why they were using TRIAC instead relay in some controllers and what is the advantages.

0 Answers  

---

How one can check the faulty capacitor, diode when connected in the circuit ? and when you can not take them out ?

4 Answers  

---

WHY KVAR IMPORTANT WHEN ANY PLANT IS RUNNING ON IT'S OWN POWER PLANT?

1 Answers  

---

What is mean by Power factor

5 Answers   Fenner,

---

What is servo motor? what is its purpose?

0 Answers  

---

State The Difference Between Generator And Alternator?

0 Answers   ABB,

---

why the the electrical machine coil are damage ? How to prevent it?

2 Answers  

---

How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

0 Answers  

---

diff. between star, delta connection?

4 Answers  

---

what happens when we give ac supply to the dc motor?and why?

4 Answers  

---

When VFD is connected to a 3 phase main supply there is load current difference between incomer to VFD and outgoing from VFD.

1 Answers   Shasun Chemicals,

---

Why Stabilising Resistor used in REF circuit ?

0 Answers  

---