5LSIG Cutler Hammer – Trip Units Programmers. 5LSIG, Cutler Hammer, Magnum DS, interchangeable Digitrip 520 trip unit or programmer, LSIG LongTime, ShortTime, Instantaneous and Ground Fault trip functions, rated for 200 6000A, suitable for Magnum DS MDS, MDN low voltage air circuit breaker frames, solid state electronic trip units