Applicatin:

M8 series Molded case circuit breaker(hereinafter referred to as MCCB) is the new series MCCB

which is developed strictly according to international standards and manufactured with advanced 

technology by US.This product complies with IEC60947-2.

The MCCB, having rated insulation voltage 500V(lnm160A) to (lnm250A) is designed to be used 

for distribution network of having rated current 10A to 1600A, rated operational voltage 380/400V to 

660/690 intended for power distribution, protection of electrical equipments and circuits against 

overload, short-circuit and under voltage, and also for unfrequent switching of electric circuits 

in most cases. 

MCCB with frame rating up to and including 400A can be used for unfrequent starting, and 

interruption of squirrel cage motors and for protection of motors against overload, short-circuit 

and undervoltage.

M8 series circuit breakers can be equipped with electric accessories and mechanical accessories

such as under voltage release shunt release, auxiliary contacts, alarm contact, electric operating 

mechanism and rotary mechanical operating handle etc.

SM8 series intelligent molded case circuit breakers are equipped with electronic release with 

the function of protection of electric circuits and equipments not only against overload,

short-circuit and under voltage, but also against earthing failure. 

The intelligent functions of it are: current failure; output of over-current signal and monitoring 

of circuit breaker open/close particularly, the intelligent trip unit is designed with interface available

for remote measuring, remote adjusting, remote controlling and remote communicating between 

circuit breakers and computers.

Technical features

with high short-circuit breaking capacity B-Basic type: general breaking capacity

N-Ordinary type: ordinary breaking capacity

S-Standard type: standard breaking capacity

H-Higher breaking type: higher breaking capacity

Complete range of current ratings which enable users to solve all protection requirements of installation

Wiring and mounting