摘要:
A matrix assembly is provided for an electrical system such as, for example, a power distribution unit for an aircraft. The electrical system includes an enclosure and a number of current carrying components such as, for example, electrical bus members, electrical switching apparatus, and/or fuses. The matrix assembly includes a matrix member having a generally planar portion, a plurality of attachment points for attaching the current carrying components to the generally planar portion, and a plurality of mounting points for attaching the generally planar portion to a thermally conductive structure such as, for example, an aluminum airframe structure. The matrix member is a thermally conductive liquid crystalline polymer. In addition to providing dielectric insulation, the matrix member also effectively transfers heat away from the current carrying components to the aluminum airframe structure, thereby reducing the temperature and corresponding electrical resistance within the electrical system and improving performance.
摘要:
An electrical switching apparatus such as, for example, a subminiature or aircraft circuit breaker, is provided for a circuit protection module of an electrical system, such as an aerospace power distribution unit. The circuit protection module includes a panel member. The electrical switching apparatus includes a housing, separable contacts enclosed by the housing, an operating mechanism for opening and closing the separable contacts, and a mounting element for attaching the housing to the panel member. The housing is a thermally conductive liquid crystalline polymer. The panel member and mounting element are thermally conductive. Heat generated by the separable contacts is transferred away from the separable contacts, through the housing and the thermally conductive mounting element, and into the thermally conductive panel member. A circuit protection module and an electrical system are also disclosed.
摘要:
A thermally managed electromagnetic switching device (2) is provided that includes a current carrying component set (4) switchable between a closed, current carrying state and an open, current interrupting state. A thermally dissipating component set (6) functionally supports and electrically isolates the current carrying component set (4) in the open state. The thermally dissipating component set (6) includes at least in part a thermally conductive polymer and is cooperatively configured to transfer heat away from the current carrying component set (4) in the closed state to dissipate thermal energy.
摘要:
An electrical switching apparatus (130) includes a coil (54), a magnetic frame (50) cooperating with the coil, a number of separable contacts (137) controlled by the coil, a number of auxiliary switches (22), a current sensor (114) structured to sense a current (108) flowing through the coil, and a magnetic sensor (120) structured to sense a magnetic field (66,106) of the magnetic frame. A circuit (24) is structured (180) to detect a predetermined characteristic (94) of the sensed current (126) flowing through the coil and output a control signal (27) responsive to the magnetic field being greater than a predetermined value (112) and the predetermined characteristic being detected. The control signal is structured to cause a change in state of the number of auxiliary switches.
摘要:
A circuit breaker module (4, 6) is provided. The circuit breaker module (4, 6) includes: a frame assembly (80), a faceplate assembly (100), and a number of circuit breakers (34), the circuit breakers (34) having an electrically conductive surface and an extending handle (39), the frame assembly (80) having a front member (82) and a back member (84), the frame assembly front member (82) and the frame assembly back member (84) being spaced from each other and defining an enclosed space (86), the frame assembly front member (82) being electrically conductive, the faceplate assembly (100) having an electrically conductive faceplate (110), the faceplate (1100 being a planar member (112) with a number of openings (118) therein, the faceplate (110) coupled to the frame assembly front member (82), the circuit breaker (34) disposed in the frame assembly enclosed space (86), and wherein the circuit breaker (34) is in electrical communication with the faceplate (110) and the frame assembly front member (82), whereby a current may pass from the circuit breaker (34) to the frame assembly front member (82).
摘要:
An electrical switching apparatus, such as a subminiature circuit breaker (2), includes a housing assembly (4), separable contacts (6), an operating mechanism (8) having an actuator device (14) and a latching assembly (40), a first trip device (10) for tripping open the separable contacts in response to an overcurrent condition, and a second trip device (12) for tripping open the separable contacts (6) in response to an arc fault, a ground fault or a remotely transmitted signal. The subminiature circuit breaker (2) includes a reset solenoid (50) and a trip solenoid (60). The resent solenoid (50) is coupled to the actuator device (14), and includes a coil (52) operable to electrically reset the separable contacts (6). The trip solenoid (60) is coupled to the latching assembly (40), and includes a coil (52) operable to move the catch lever (42), thereby electrically tripping open the separable contacts (6).
摘要:
An improved electrical switching apparatus comprises a plurality of electrical switching assemblies in a ganged configuration. A bridging device mechanically connects together the actuator devices of the electrical switching assemblies to cause the simultaneous tripping of all of the electrical switching assemblies when an overload or an arc fault is detected on any electrical switching assembly of the gang.