Abstract:
Die Erfindung betrifft eine Schaltanlage für die Mittelspannung mit Kurzschließereinheit, gemäß Oberbegriff des Patentanspruches 1. Um hierbei zu erreichen, dass die Funktionalität eines extrem schnellen Kurzschließers auf leichte Weise mit implementiert, bzw leicht nachgerüstet werden kann, ist erfindungsgemäß vorgeschlagen, dass die Kurzschließer als dreiphasige Einheit auf einem Support angeordnet sind, welcher in einen offenbaren Ausschnitt eines Schaltanlagengehäuses über eine Einschub/Ausschubbühne beweglich ein und ausschiebbar ist.
Abstract:
Resettable circuit interrupting devices, such as GFCI devices (ground fault circuit interrupters), ALCI devices (arc fault circuit interrupters), ICDI devices (immersion detection circuit interrupteurs), RCDs (residual current devices), that include reverse wiring protection (fig. 62), and optionally an independent trip portions (fig. 24) and/or a reset lockout portion (60, 330) are provided. Further is a signaling system employing indicator lamp means (64) and an audible alarm (236) is employed to remind a user to periodically test his GFCIs and to provide information regarding the status of the GFCI. The power lines that supply the GFCI with power are also coupled to the circuits on the PCB (122) to disconnect power to those circuits of the GFCI that trips due to faults or tests.
Abstract:
A two-pole miniature circuit breaker is configured for calibration of both pole mechanisms with the circuit breaker fully assembled. The identical pole mechanisms are mounted in the same orientation in parallel outer compartments of a molded housing with the metal support frame of one pole against the outer housing wall and the frame of the other spaced from the associated outer wall. A coupler couples the two-pole mechanisms together for simultaneous opening of both poles when either pole is tripped has an actuating member on each end which engages the trip device of the associated pole. The actuating member, at least of the pole with the metal frame spaced from the housing outer wall, is configured to provide direct access for a calibration tool inserted through a calibration opening in the housing to engage a calibration slot in the metal frame.
Abstract:
A circuit breaker includes a pair of separable contacts forming a pole, an operating mechanism for operating the electrical contacts, an electronic trip circuit responsive to currents flowing through the pole for operating the operating contacts, and a fail-safe mechanism for operating the operating mechanism in solenoid that is electrically connected to be energized in response to a failure in the electronic trip circuit and a linkage that operates the operating mechanism in response to operation of the solenoid. An operating arm that moves in response to the solenoid, interacts with operating mechanism to prevent resetting of the operating mechanism following actuation of the solenoid.
Abstract:
Resettable circuit breakers (10) having an independent trip mechanism (26) and a reset lockout (60) are provided. The trip mechanism operates (26) independently of the fault protection operations, and the reset lockout (60) prevents the resetting of the circuit breaker if the fault protection is non-operational or if an open neutral exists.
Abstract:
A circuit breaker including a switch assembly for initiating one of at least two test conditions. The switch assembly is coupled ot a circuit board, an integrated circuit mounted thereon, and a solenoid, such that upon the initiation of either of the two conditions, the solenoid engages the armature latch in a circuit trip assembly within the breaker so as to cause the armature latch to initiate its movement from a first position to a second position. In this way, the circuit breaker can simulate a plurality of test conditions, such as fault conditions.
Abstract:
An arc fault circuit breaker (10) conducting an electric current to a protected load is presented. The circuit breaker (10) has a first (mechanical) compartment (24) and a second (electrical) compartment (62). A bimetal resistor (50) is disposed within the first compartment (24) and conducts the current therethrough. The bimetal resistor (50) has a stud (56) extending into the second compartment (62). A single sense line (60) is electrically connected to the bimetal resistor (50) and routed into the second compartment (62). The sense line (60) and said stud (56) conduct a voltage signal indicative of arcing of the current. A circuit board (84) is disposed within the second compartment (62) and is connected to the sense line (60) and stud (56) within the second compartment (62) to process the voltage signal. The circuit board (84) has a first conductive path (104) electrically connected to the stud (56), and a second conductive path (106) electrically connected to the sense line (60). The first and second conductive paths (104, 106) run substantially parallel and proximate to each other such that electromagnetic interference of the voltage signal is substantially reduced.
Abstract:
An arc fault circuit breaker (10) comprising an electronics portion (22) that is interconnected with a mechanical portion (12) is presented. A plunger arm (50) affixed to the end of a plunger shaft (42) of a solenoid (40) connects the electronics portion (22) with the mechanical portion (12). A protrusion (64) is provided to assist in assembly of the circuit breaker (10). The protrusion (64) depends from the plunger arm (34). An assembler applies a light downward force with one finger (60) on the protrusion (64) and the plunger arm (34) tends to assume a position at right angles to the surface of the printed circuit board (38). When the electronics portion (22) is connected with the mechanical portion (12), the plunger arm (34) is properly aligned and it enters into the slot (46). If the electronics portion (22) is slightly offset, the finger (60) on the protrusion (64) can move the plunger arm (34) slightly to align the plunger arm (34). Thus, the invention enables an assembler to hold and guide the plunger arm (34) into the correct position with one hand while assembling the circuit breaker (10).
Abstract:
An instantaneous trip power transformer particularly well suited for residential circuit breaker applications includes a high current main outer winding wound to have one or more turns, for providing the main breaker contact current path and for serving as the transformer primary winding for providing power to the breaker electronic components. The transformer includes a secondary winding configured to provide power to trip circuit electronic components. The secondary winding is wound in a substantially cylindrical shape and has a bore therethrough. The main outer winding is wound around an outer surface of the secondary winding. Leads electrically connected to the secondary winding supply power to the trip circuit. A third, or trip, winding is located within the secondary winding bore, and is configured to trip the breaker under electronic control. The third winding is wound in a substantially cylindrical shape and leads to a trip circuit are electrically connected to the third winding. A tripping mechanism activation plunger, adapted to be driven by the main outer winding and/or the trip winding, extends from one end of the third winding and is adapted to be coupled to the breaker switch.