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Supplementary Protectors - Miniature Cicuit Breakers
Siemens' UL 1077 Supplementary Protectors are designed to provide additional protection along with a branch circuit protection device. Since our Supplementary protectors are made to trip faster than a standard UL 489 Circuit Breaker they are able to provide additional protection for more sensitive devices inside the panel. Supplementary protectors can used in a number of industrial applications such as to provide selectivity for multiple motor control circuits on the secondary side of a control transformer or power supply by allowing the user to quickly find the problem circuit should a fault occur with out having to shut down all of the other control circuits. Supplementary protectors may also be used as a local disconnecting means inside the panel when a branch circuit protection device is already present.
5SY Supplementary Protector Benefits
High rated breaking capacity of up to 14,000 A
Identical terminals at both sides for an optional infeed from the top or the bottom
No tool required for mounting or dismounting
Separate switch position indication