(ACB)

(ATS)

(MCCB)

(MCB)

(SF)

(LMC)

(RCCB) (RCBO)

(CB)

(DB)

Low Voltage miniature circuit breakers

Application

The function of the Miniature Circuit Breaker (MCB) is to protect cables and conductors against overloads and short circuits, and electrical equipment from overheating. Under certain fault conditions, the MCB can protect against shock currents caused by excessive touch voltage due to insulation failure. Designed according to IEC 898 and EN60898 standards, the MCB also conforms to other international standards which has the equivalent requirements of tripping characteristics.

 

Features

• High-rated breaking capacity up to 6kA, according to IEC 898 or BS 3871.
• Excellent current limiting and selectivity.
• Type ‘A, B, C & D ’ curve tripping characteristic, suitable for most applications.
• Add-on accessories for added flexibility.
• Combined terminal allows busbar and feeder cable to be simultaneously connected.
• Finger-safe shield to protect accidental contact between user and live terminals.
• Fire-retardent material used for the base and covers.
• Terminals allow easy termination of up to 25mm cables.

Tripping Characteristics

At higher operating temperatures of more than 40� C, the currents of the delayed tripping have to be derated by 5% for each 10K temperature difference. The decrease in operating temperature means an increase in the rated current. The table below shows the tripping performance of the MCB in accordance to IEC 898 standards.

Tripping Characteristic A

Tripping Characteristic B

Tripping Characteristic C

Tripping Characteristic D