TH41277A - Electrical circuit breakers with safety shielding. - Google Patents

Abstract

The DC60 (08/01/41) fitted circuit breaker comprises an insulated, shielded enclosure 48 arranged between the swivel base 29 of the handle 18 and the intermediate chamber separation 36 of the electromagnetic interrupter to prevent the ejection of ionized gas through the air vent 27 of the front panel during the arc extinguishing phase. This shielding comprises a first separate partition panel 44A molded to the 10A fitting of a second separate partition panel 44B molded to the 10B cover. The first and second partition panels meet when the 10B cover is connected to the 10A fitting. The first partition panel 44A protrudes between the front panel 28 and the raised section 46 connected to the insulated support lever 34 of the movable contact arm 32. The aforementioned raised sections operate in conjunction in the position. The first partition panel 44A is molded to the 10B cover, providing continuity with shield 48. The second partition panel 44B of the 10B cover is positioned between the front panel 28 and the axially rotating support plate 16 of the operating mechanism 14. The fitted circuit breaker comprises a shielded insulating enclosure 48, positioned between the rotating base 29 of the handle 18 and the intermediate chamber separation 36 of the electromagnetic interrupter. To prevent the ejection of ionized gas through the front panel's air vent 27 during the arc extinguishing phase, the shield consists of a first separate partition panel 44A molded to the 10A cover of the second separate partition panel 44B molded to the 10B cover. The first and second partition panels meet when the 10B cover is attached. Connected to the 10A cover, the first barrier panel 44A protrudes between the front panel 28 and the raised section 46, which is linked to the insulated support lever 34 of the movable contact arm 32. The aforementioned raised section operates in the open position with the first barrier panel 44A to provide continuity to the shield 48. The second barrier panel 44B of the 10B cover is positioned between the front panel 28 and the axially rotating support plate 16 of the actuating mechanism 14.

Claims (5)

1. An electrical circuit breaker fitted into a molded insulating enclosure, which consists of a fitting (1OA) and a cover (1OB) in the form of an outer shell half that is interlocked at the level of the assembly connection (12) and the inner boundary - upper chamber separation (68) which is fitted to the handle. (18) and the operating mechanism (14) with a support plate rotating around an axis (16) to drive the movable contact arm (32). The aforementioned handle (18) protrudes from the enclosure through the vents (27) provided in the front panel (28) and on the other hand is mechanically connected to the plate (16) by a power rod (20) - recessed slots (22A,22B,24A,24B) provided near the opposite surfaces of the enclosure to accommodate the two connecting poles (60,66) - the central section which is subdivided into an intermediate chamber (36) for the assembly of the electromagnetic cutoff device (54) and a lower chamber (38) which is fitted to the arc extinguishing chamber (56) - and exhaust ports (42A,42B) for the outlet of the cutting gas when the arc extinguishing occurs in the aforementioned chamber (56). It is uniquely designed with an additional shield (48) fitted between the rotating base (29) of the handle (18) and the intermediate chamber separator (36) to prevent the ionization of gases through the vent (27) of the front panel (28) during the arc extinguishing phase. 2. An electrical circuit breaker conforming to claim 1 is characterized in which such shield (48) is formed by a first separate partition panel (44A) which is molded to have a fitting (10A) and a second partition panel (44B) which is molded to have a cover (10B). The aforementioned first and second partition panels (44A,44B) meet when such cover (10B) is connected to the fitting (10A). 3. An electrical circuit breaker conforming to claim 1 is characterized in which the first barrier (44A) protrudes between the front panel (28) and the raised section (46) which is connected to the insulated support lever (34) of the movable contact arm (32). The aforementioned raised section operates in the open position with the first barrier (44A) to provide continuity of the shield (48). 4. An electrical circuit breaker conforming to claim 2 or 3 is made specifically where a second partition panel (44BO) of the cover (10B) is placed between the front panel (28) and the rotating support plate (16) of the operating mechanism (14). 5. Electrical circuit breakers conforming to claims 1 through 4 are characterized in which the vent opening (42A, 42B) is placed opposite the vent opening (27) which is fitted to the base (29) of the handle (18).