Perbedaan MCB, MCCB DAN ACB

MCB Mini Circuit Breaker

The miniature circuit breaker is a protection device that prevents damage to an equipment /circuit on the event of an overload or short circuit faults. During overload and short circuits excessive current flows to the load that may damage the equipment.

MCBs are most commonly used in the distribution board at home.

MCBs can safely act during short circuits resulting in the current flow up to 15kA, depending on its short circuit breaking capacity.

MCBs are available in single, double, triple and four pole versions and continuous current rating from 0.5A up to 100A.

Miniature circuit breakers perform four important functions:

1. Switching
2. Overcurrent protection
3. Short Circuit Protection
4. Arc Quenching

MCCB – Moulded Case Circuit breakers

Similar to Miniature Circuit Breakers, Moulded Case Circuit Breakers are also overload and short circuit protection devices. Moulded Case Circuit Breakers can withstand more short circuit current more than miniature circuit breakers. Also, the continuous current rating of the same can be adjusted as per requirement.

• May be Thermal/ Thermo-Magnetic/Electronic trip type

      •      Primarily provide protection against over-current and short circuit.
•      Can provide protection against Earth Fault, Residual Currents, Under voltage etc
•      Available up to the rating of2500A.
•      The trip level can be varied in adjustable trip type MCCBs.
•      Remote ON/OFF is possible with additional accessories
•      Commonly used is loads over 100A and motor protection circuits.
•      Some MCCBs are microcontroller based.
•      Available in single, two, three and four pole versions.

MPCB – Motor Protection Circuit Breaker

MPCB (Motor Protection Circuit Breaker) is a short circuit and overload protection device dedicated used for the safe operation of motors. But unlike MCCBs and MCBs, the trip characteristics of an MPCB allows the high inrush current during the motor start without allowing overcurrent that may damage the motor winding

MPCBs are available only in three pole versions and has a maximum short-circuit current withstand capability of 100kA. MPCBs are a cost-effective and efficient solution to conventional motor starters, which use fuse-thermal overload relay combinations

The short circuit capacity of MPCBs is very high compared to that of MCBs. Also, MPCBs are more compact than MCCB. The overcurrent set point of the MPCB can be adjusted as required. Moreover, MPCBs can protect the motor against phase loss or phase imbalance. MPCBs once tripped has to be manually reset after the clearance of fault

RCCB/RCD – Residual Current Circuit Breaker/Residual current device

RCBO – Residual Current Circuit Breaker with Overload

Residual current circuit breakers are devices that protect against electric shock. It senses earth leakages and residual currents and ensures protection against electric shock

Residual current circuit breaker with overload (RCBO) is a combination of RCCB and MCB. It constitutes short circuit, overload and residual current protection features

RCBO is available in two pole and four pole versions. The leakage current sensing range of RCBO ranges as 10Ma, 30mA, 100mA and 300mA. Also, continuous current ratings of 25A, 40A, 63A, 80A, 100A and 125A are available. The short circuit breaking capacity breaking capacity of an RCBO varies up to 15kA

Isolator/ Disconnector dan Contactor

Change Over switch, Command Control, are devices used to isolate a circuit or equipment from the power supply during maintenance, in order to ensure the safety of workman. Isolators are offload devices, meaning the current flow through the isolator should be zero before the operation. They do not offer any kind of protection to the circuit or device

ACB – Air Circuit Breaker

Overcurrent and short-circuit protection for electric circuits over 800 Amps to 6.3K Amps

Air circuit breaker is circuit operation breaker that operates in the air as an arc extinguishing medium, at a given atmospheric pressure

PERBEDAAN
MCCB	ACB
Sampai dengan 3200 A	Sampai dengan 6300 Amps
Lebih murah	Lebih mahal
Lebih kecil	Lebih besar
Magnetik dan thermal-magnetik	Thermal-magnetik
Magnetik, elektronik, dan thermal-magnetik	Thermal-magnetik atau elektronik
A	B