What is the Difference Between MCCB & ACB & VCB ?
| MCCB | ACB | VCB |
|---|---|---|
| MCCB is stands for Moulded Case Circuit Breaker. |
ACB is stands for Air Circuit Breaker. | VCB is stands for Vacuum Circuit Breaker. |
| The moulded case circuit breaker which use ark quenching device as AIR which is used upto 500 Amps only. |
The Air Circuit Breaker which use quenching device as air and used upto 3000 Amps at 415 volts. |
The Vaccum Circuit Breaker which use ark quenching device as a vaccum and used for 415 volts.6.6 KV,11 KV,33 KV,132 KV,220 KV also. |
| Thermomagnetic operaton-For large surges in ct- In distribution boards-bimetallic strip responding to less extreme but longer_term over_current conditions-applicable for low voltages. |
Low volt power cb-trip characteristics r adjustable-air s the arc quenching medium applicable upto 440V. |
Medium volt power cb-trip char. Adjustable-mechanical sys. used for trip & open-Vaccuum s the arc quenching medium-applicable upto 36kV. |
| MCCB s the used low rating Lt pannel. | ACB s the used high rating Lt pannel. | VCB s the used high rating Ht pannel. |
| MCCB is used for load purpose and is should used up to 1200-1500A only. |
ACB is used for low tension (LT) panel it should carry up to 4000A and more. |
VCB is used for high tension (HT) panel it means carry 11KV and low amps rating it can withstand at long time at high Voltage also. |