A B S T R A C T VARIABLE OVERLOAD PROTECTION FOR MCCB The present invention relates to a system for variable overload protection in moulded case circuit breakers. The system comprises a current carrying part (1) having two arms of unequal length, a bimetallic strip means (2) having predetermined active length for deflection being fixed to the current carrying part at its one end, a slider means (4) wherein engaged with the strip means (2) such that sliding motion of said slider means varies the active length of said strip means, a carrier element (5) holding the slider means such that the slider means is movable in a substantially vertical direction. The current carrying part comprises a slot means having length substantially equal to said strip means so as to accommodate said slider means and said carrier element in a manner that vertical movement of said carrier element being restricted, rotation of the carrier element allows said slider means to be vertically adjustable at various length position thereby providing various active lengths for said bimetallic strip. Figure 3
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