furnace breaker switch

The protection at the upstream circuit breaker should be set to provide short-circuit protection for the cables and backup overcurrent protection for the arc furnace transformer and associated directly to the connected switching device.Considering the preceding discussions relevant to arc furnace applications, we recommend the following:The arc furnace transformer feeder circuit breaker at the switchgear should be a conventional drawout circuit breaker or an outdoor circuit breaker, used for backup protections of the arc furnace and its associated dedicated switching device, not for routine switching of the arc furnace.The arc furnace transformer should be switched routinely by a dedicated special purpose circuit breaker, such as our type 3AH4, located in the transformer vault.The connections between the arc furnace transformer and its associated routine switching device should be by means of open bus bars to minimize capacitance.A transient voltage study should be performed by an organization that is competent to perform high frequency transient voltage studies.

Thus, the switching operation for the circuit breaker is a no-load or light load operation, and accordingly, contact erosion is not really a significant issue. These circuit breakers are available only in a fixed-mount configuration not in a drawout form.Transient voltage phenomena present a second major issue that must be considered.The arc furnace transformer should be installed in a vault adjacent to the arc furnace. A gas or oil furnace (fossil fuel furnaces) will be powered by a single breaker feeding 120 volts to the furnace.

... Two Pole Vs Single Pole Breakers. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Regardless of your furnace’s age or brand, it has at least one regular wall switch located on or close to it. All About Electrical Wiring Types, Sizes, and Installation