It is provided with a viewing window that allows visual access to an indicator flag for the purpose of identifying the true status of the electrical power connectors and secondary test connectors extending from the rear surface of the circuit breaker.
Features and Benefits. Description. Drawout type generator circuit breakers for use in type GM-SG metal-clad switchgear are available. These circuit breakers are derived from the same type 3AH3 family of circuit breaker operating mechanisms as our standard non-generator circuit breakers. Drawout MCCB Panelboard. Eaton’s drawout molded-case Pow-R-Line 4D (PRL4D) panelboard is the industry’s first solution that offers an innovative draw-out mechanism.  The front cover of a draw-out circuit breaker is provided with a viewing window that allows visual access to an indicator flag for the purpose of identifying the true status of the electrical power connectors and secondary test connectors extending from the rear surface of the circuit breaker. FIG. 1 is a top perspective view of an industrial rated draw-out circuit breaker that utilizes the electrical indication system in accordance with the invention; FIG. 2 is an enlarged top perspective view of the electrical indication system used with the circuit breaker of FIG. 1; A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow. Circuit breakers are usually able to terminate all current very quickly: typically the arc is extinguished between 30 ms and 150 ms after the mechanism has been tripped, depending upon age and construction of the device. The maximum current value and let-through energy determine the quality of the circuit breakers. (2) That portion of an interchangeable trip molded case circuit breaker remaining when the interchangeable trip unit is removed. close button = A button for manually closing the main contacts after the closing springs are charged. close button cover = A cover which fits over the close button and blocks access to it. ambient temperature rating = Temperature at which the continuous current rating (handle rating) of a circuit breaker is based; the temperature of the air immediately surrounding the circuit breaker which can affect the thermal (overload) tripping characteristics of thermal-magnetic circuit breakers. The basic design of the circuit breakers is the same, making maintenance and operation of the generator circuit breakers the same as for non-generator circuit breakers. This means that there is no incremental or additional training needed for your maintenance or operational personnel. These circuit breakers are derived from the same type 3AH3 family of circuit breaker operating mechanisms as our standard The front cover of an industrial draw-out circuit breaker is provided with a viewing window that allows visual access to an indicator flag for the purpose of identifying the true status of the electrical power connectors and secondary test connectors extending from the rear surface of the circuit breaker.... FIG. 1 is a top perspective view of an industrial rated draw-out circuit breaker that utilizes the electrical indication system in accordance with the invention; FIG. 2 is an enlarged top perspective view of the electrical indication system used with the circuit breaker of FIG. 1; Making the world better, one answer at a time. A drawout breaker has two parts (base and breaker). The base is wired to the load frame and bolted in. The breaker slides in and out of the base, and connects physically and electrically to the base (so it's easy to rack out for maintenance). A fixed mounted circuit breaker is bolted directly to the enclosure and wired to the load frame. 1 Power feeing the circuit breaker must be turned off in order to remove and replace the circuit breaker. 2  Drawout Mounted-A drawout circuit breaker also has two parts: a base, which is bolted and hard wired to the frame and the actual breaker, which slides into the base. 1 Power feeding the circuit breaker must be turned off in order to remove and replace this unit. 2  Removable-A removable circuit breaker has two parts: a base, which is bolted and hard-wired to the frame, and the actual breaker, which is plugged The circuit breaker must detect a fault condition; in low voltage circuit breakers this is usually done within the breaker enclosure. Circuit breakers for large currents or high voltages are usually arranged with protective relay pilot devices to sense a fault condition and to operate the trip opening mechanism. Circuit breakers are usually able to terminate all current very quickly: typically the arc is extinguished between 30 ms and 150 ms after the mechanism has been tripped, depending upon age and construction of the device. The maximum current value and let-through energy determine the quality of the circuit breakers.
http://w3.usa.siemens.com/powerdistribution/us/en/product-portfolio/Medium-Voltage-Switchgear/Pages/Medium-Voltage-Vacuum-Generator-Circuit-Breakers-Drawout-Type.aspx http://www.eaton.com/Eaton/ProductsServices/Electrical/ProductsandServices/ElectricalDistribution/Panelboards/Distribution/PRL4D/index.htm http://www.google.com/patents/US6005208 https://en.wikipedia.org/wiki/Circuit_breaker http://www.schneider-electric.us/sites/us/en/support/product-support-resources/ul-508a-support/definitions.page http://w3.usa.siemens.com/powerdistribution/us/en/product-portfolio/Medium-Voltage-Switchgear/Pages/Medium-Voltage-Vacuum-Generator-Circuit-Breakers-Drawout-Type.aspx http://www.google.com/patents/US6005208 http://www.answers.com/Q/What_is_the_difference_between_Draw-out_and_Fixed-air_circuit_breaker http://www.galco.com/comp/prod/circ.htm https://en.wikipedia.org/wiki/Circuit_breaker
what is a drawout circuit breaker