K and UH
250Vac and 600Vac
Cable limiters are intended to provide short-circuit protection to electrical systems, typically between the transformer and service entrance. Should a short-circuit occur, the cable limiter removes the affected cable(s) from service and permits the other conductors to continue delivering power.
Cable limiters are often used in utility low voltage networks and large multi-cable per phase service entrances.
Unlike fuses, cable limiters are selected by cable size rather than amperage, e.g., a “4/0” limiter will carry the current of a 4/0 cable.
Limiters are stable, totally self-contained, static devices with unchanging characteristics that operate without venting of ionized gases or explosive action.
Under high short-circuit conditions, limiters cut off fault currents within one-half cycle (0.008 seconds) and reduce insulation damage from the immense heat that is developed by sustained fault current flow. They confine damage to the point of the short-circuit and stop long-length cable burn-back and striking of multiple arcs to minimize damage to or eliminate damage to adjacent conductors.