Product Introduction
This MCCB is designed for distribution and protection in industrial and commercial power systems, where selective coordination and fault isolation are required. The TMA trip unit provides thermal-magnetic overload and short-circuit protection, adjustable to match downstream load characteristics.
For a panel builder or site engineer, this determines the feeder size and the upstream transformer or bus rating it can protect. The TMA trip unit's thermal element responds to sustained overloads with an inverse-time curve, while the magnetic element clears short-circuit faults instantaneously — a combination that suits motor circuits and general distribution where nuisance tripping on inrush must be avoided.