{"v":"2.0","page_type":"product","title":"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 without 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. Supplementary protectors are equipped with a delayed overload/time-dependent thermal release (thermal bimetal) for low over currents and with an instantaneous electromagnetic release for high overload and short-circuit currents. The thermal trip point on all versions is 1.13 to 1.45 times the supplementary protector rating.","breadcrumbs":[{"label":"Home","href":"/python/html6/index.html"},{"label":"Brands","href":"/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html"},{"label":"Siemens","href":"/python/html6/menu_brand_products/1000/133000/menu_brand_products_SIEMENS_1_e104ef7ab5.html"},{"label":"B000UW2W8G","href":null}],"content":{"product":{"mpn":"B000UW2W8G","manufacturer":"Siemens","brand":"Siemens","brand_url":"/python/html6/menu_brand_products/1000/133000/menu_brand_products_SIEMENS_1_e104ef7ab5.html","title":"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 without 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. Supplementary protectors are equipped with a delayed overload/time-dependent thermal release (thermal bimetal) for low over currents and with an instantaneous electromagnetic release for high overload and short-circuit currents. 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