Megger psi410 phase sequence indicator megger 1001 612 the megger psi410 phase rotation indicator provides rapid indication of correct phase sequence utilising a three bi coloured led display and a specific audible tone clockwise rotation is indicated by clockwise rotating green leds with a continuous tone and counter clockwise rotation has counter clockwise rotating red leds and a warbling tone fused test leads croc clips and prods are provided the prods are insulated to leave less than