Phase busbar Steg Multi 9 for C60 (UL1077). 2-pole, nominal current 63A, 12 pitch units, step width 18mm, operating voltage (Ue) 480Y/277V, insulation voltage (Ui) 690V. These comb busbars are only used for C60SP miniature circuit breakers according to UL 1077. They generate a voltage supply directly in the cage of the miniature circuit breaker. Compatible with the breaking capacity of the C60SP miniature circuit breakers and the additional protective device. The phase busbar Steg for C60SP meets the following UL 1077 standards.