Application
The MCCB Standard and Superior series are suitable for circuit protection in individual enclosures, switchboards, lighting and power panels as well as motor-control centres. The MCCB is designed to protect systems against overload and short circuits.

Mechanism
Both the Standard and Superior series are designed to be trip-free. This applies when the breaker contacts open under overload and short circuit conditions and even if the breaker handle is held at the ON position. To eliminate single phasing, should an overload or short circuit occur on any one phase, a common trip mechanism will disconnect all phase contacts of a multipole breaker.

Material
The Superior series circuit breakers’ housing is made of BMC material, which is unbreakable and has a very high dielectric strength, to ensure the highest level of insulation.

Accessories
To enhance the Superior series, internal and external modules can be fitted onto the breaker. They are as follows (with ordering codes for reference):

International standards
The MCCB standard and superior series conform and meet the requirements of these international governing bodies :

• IEC 947-2  from the International Electrotechnical Committee
• BS EN60947-2  from British Standards
• BT/T14048-2  from American Standards
• VDE 0660  from Germany