The present disclosure relates to an arc extinguishing chamber base of a molded case circuit breaker and, more specifically, to an arc extinguishing chamber base of a molded case circuit breaker, manufactured using a thermoplastic resin. The present disclosure enables an arc extinguishing chamber base for forming a molded case circuit breaker to be manufactured using an aromatic polyamide-based thermoplastic resin, thereby enabling an increase in productivity, a decrease in component weight, a reduction in component production time, an eco-friendly effect, and recycling. Furthermore, component lifespan increases.

A circuit interrupter includes a fixed terminal, a movable contactor, a moving mechanism, a squib, and accommodation. The fixed terminal includes a fixed contact. The movable contactor includes a movable contact connected to the fixed contact. The moving mechanism is configured to move the movable contactor from a closed position where the movable contact is connected to the fixed contact to an open position where the movable contact is separated from the fixed contact. The squib is configured to generate gas by combustion. The accommodation is for accommodating the fixed contact and the movable contactor. In the circuit interrupter, the gas is introduced into the accommodation.

An electric switching unit comprises a casing and a plurality of arc extinguishing chambers formed inside the casing, each arc extinguishing chamber comprising a gas discharge orifice opening to outside the casing.

The electric switching unit comprises a filtering device positioned outside the casing and comprising: a plurality of inlet openings placed on a lower region of the filtering device, each one being configured to collaborate fluidically with one of the said gas discharge orifices; an outlet opening placed on a lateral region of the filtering device; a common internal chamber which places the inlet openings in fluidic communication with the outlet opening; and a filter located inside the internal chamber between the inlet openings and the outlet opening.

An electric switching unit comprises a casing and a plurality of arc extinguishing chambers formed inside the casing, each arc extinguishing chamber comprising a gas discharge orifice opening to outside the casing.

The electric switching unit comprises a filtering device positioned outside the casing and comprising: a plurality of inlet openings placed on a lower region of the filtering device, each one being configured to collaborate fluidically with one of the said gas discharge orifices; an outlet opening placed on a lateral region of the filtering device; a common internal chamber which places the inlet openings in fluidic communication with the outlet opening; and a filter located inside the internal chamber between the inlet openings and the outlet opening.

A circuit interrupting device is provided. In some configurations, the circuit interrupting device includes a base and an arc chamber assembly received within the base. The arc chamber assembly includes an arc chamber framework and a plurality of splitter plates received within the arc chamber framework. The arc chamber framework includes a first plurality of protrusions and a second plurality of protrusions that laterally extend in a direction toward one another. Adjacent pairs of the first plurality of protrusions and the second plurality of protrusions are arranged on opposing sides of each of the plurality of splitter plates.

A circuit interrupting device is provided. In some configurations, the circuit interrupting device includes a base and an arc chamber assembly received within the base. The arc chamber assembly includes an arc chamber framework and a plurality of splitter plates received within the arc chamber framework. The arc chamber framework includes a first plurality of protrusions and a second plurality of protrusions that laterally extend in a direction toward one another. Adjacent pairs of the first plurality of protrusions and the second plurality of protrusions are arranged on opposing sides of each of the plurality of splitter plates.

A method of making a fuse including inserting a fuse element into a cavity in a hollow fuse body, attaching a first end cap to the hollow fuse body and electrically connecting a first end of the fuse element to the first end cap, adding a mixture of particles including a melamine compound and a steatite of at least 2 times the melamine compound by weightto the cavity such that the mixture of particles are disposed around the fuse element, and attaching a second end cap to the hollow fuse body and electrically connecting a second end of the fuse element to the second end cap.

A gas circuit breaker includes: a fixed arc contact extending along an operating axis; a moving arc contact allowed to move to a position where the moving arc contact contacts the fixed arc contact and a position where the moving arc contact is separated from the fixed arc contact; a frame forming a puffer chamber around the moving arc contact; a nozzle having a cylindrical shape centered on the operating axis, the nozzle being fixed to the frame and projecting in a direction toward the fixed arc contact from the moving arc contact; and an arc extinction assisting portion provided on an inner surface of the nozzle and made of an ablation material. The nozzle and the arc extinction assisting portion are provided with a fall-off preventing portion to prevent the arc extinction assisting portion from falling off the nozzle.

This electric switch comprises an arc-blasting unit with a compression cylinder (25) enclosing a compression chamber (27) mobile together with the mobile contacts (2), and a stationary piston (13) at an end of the compression chamber, provided with a support rod made up as a blowpipe (9) which channels the gas compressed in the chamber when the contacts separate to a nozzle (10) that directs the flow to a separation place (12) of the contacts so as to efficiently blast electric arcs. The arrangement is lightweight and occupies little space.

An electronic circuit breaker comprises an arc interruption mechanism that would enhance arc attraction to arc plates and would reduce the possibilities of an arc escaping from the arc plates. The arc interruption mechanism includes an enhanced arc extinguishing chamber. The arc extinguishing chamber includes a plurality of arc plates having first and second sides. The circuit breaker further comprises a stationary contact plate that includes a first arc runner disposed near the first side of the plurality of arc plates. The circuit breaker further comprises a load terminal that includes a second arc runner disposed near the second side of the plurality of arc plates. As an arc is attracted by the plurality of arc plates and the arc enters the plurality of arc plates, a length of a current path associated with the arc is reduced through the first arc runner and the second arc runner by reducing a resistance of the current path for the arc or by reducing a voltage across the circuit breaker.