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Willmall isolator switches provide a defined point of disconnection for circuits and equipment, supporting safe isolation during maintenance and service work.
It provides a visible point of disconnection between a supply and the circuit or equipment, so the downstream side can be made dead for maintenance and service work.
A circuit breaker provides protection trip functions, while an isolator is primarily for safe disconnection. Isolators that can make and break normal load current are described as switch-disconnectors.
They are rated by operating voltage, current, and pole configuration, matched to the supply system and the load current that the switch must be able to disconnect.
They are commonly fitted as main switches, machine isolators, and disconnection points inside distribution boards and on equipment incoming supplies.
A lockable handle allows the switch to be secured in the off position, supporting lockout-tagout procedures that require controlled re-energisation after maintenance.
