Answer / ektate prashant

ACB- Air circuit breaker
MCCB- Moulded case circuit breaker
Arc Quenching medium in both the breakers is air only.
The difference is ACBs are of higher capicity as compared
to MCCBs.

Answer / ashutosh

The Main Differnce in Acb & Mccb is that Acb is Used For
Higer Cureent Rating >800A While The MCCB is Used For Lower
Cureent Rating<800A

Answer / prince

ACB-Air Circuit Breaker ,MCCB-Moulded Case Circuit Breaker.
ACB using for higher current ratings and MCCB using for
lower current ratings.

Answer / akash-ncl

ACB- AIR CIRCUIT BREAKER
MCCB-Moulded case circuit breaker

Quenching media is same for both
Protection features which consumer can set will available
with acb i.e o/c,o/c time,sc amps,sc current interrupt time
and ground fault limitings

and lost and most,
short circuit limiting capability Isc is more with acb

selection of acb/mccb depends upon device,fault
level,application and economical calculation since cost
diff is most considerable here

Answer / nagaraja

ACB-Air Circuit Breaker ,MCCB-Moulded Case Circuit Breaker.
ACB using for higher current ratings and MCCB using for
lower current ratings.
ACB works under voltage as well as over current,But MCCB
will not works Under voltage.Only over current(new mccb
having under voltage fecility also through closing coil
intrudusing)

Answer / rajesh tewari

acb for more then 900 amp and mccb is less then 900amp.acb
protection in short ckt .open ckt. earth fault.ground
fault.unbalanced load.and dispaly it in digital vidio
dispaly.but mccb gives us protection bnut not dispaly

Answer / vijay kumar

air circuit breaker is use to open and close the circuit at normal and fault conditions

but motor control circuit board is used to control the motor current at starting and running conditions and also phase transformation like star to delta and delta to star connection
that is the basic deffence

Answer / ramya

ACB = Air circuit Breaker,
MCCB = motor controlled circuit breaker.

I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?

0 Answers  

SUPPOSE A CIRCUIT BREAKER HAS TRIPPED THE THE LINE WHEN A FAULT OCCUR ON IT.NOW WHEN THE FAULT HAS BEEN CLEARED, HOW THE CIRCUIT BREAKER WILL CLOSE AUTOMATICALLY NOT MANUALLY.

6 Answers   Bureau of Energy Efficiency, DVC,

What is the difference between ELCB and RCD

7 Answers  

difference between EMVT, PT & CVT ?

9 Answers  

how to determine motor size for a fan application?

0 Answers   EDC,

how much amps will get from a 360/11kv line

2 Answers  

THE ROTIO OF VOLTAGE AND CURRENT IN A CLOSED CIRCUIT

12 Answers   APGenco, Constant, Lanco,

for a machine R=130 KVA Y=132 KVA B=144 KVA Then what will be the total kva

3 Answers   ABB,

is harmonic useful or it distort the alternating quantity?

2 Answers  

What do you mean by creepage distance?

4 Answers   Amara Raja,

what is zero sequence curr ent ?

4 Answers  

What is minimum permicible value of leackage current for LT Panle when applying voltage up to 3 KV for 5 Minuits?

0 Answers   BFL,