A power feeding path switching device includes a relay (RL1). The relay becomes excited when a power supply current flows across the relay in a first direction of a power feeding path, and becomes unexcited when a power supply current flows across the relay in a second direction opposite to the first direction, or when a power supply current does not flow across the relay. The relay in an unexcited state connects the power feeding path with ground, and the relay in an excited state does not connect the power feeding path with ground.

Intelligent safety disconnect switching methods and arrangements for PhotoVoltaic (PV) panels are disclosed. A determination is made as to whether a reconnect condition, for reconnecting a PV panel to a power system from which the PV panel is disconnected, is satisfied. The PV panel is automatically reconnected to the power system responsive to determining that the reconnect condition is satisfied. A determination is then made as to whether a power system operating condition is satisfied on reconnection of the PV panel, and the PV panel is automatically disconnected from the power system responsive to determining that the power system operating condition is not satisfied on reconnection of the PV panel.

Intelligent safety disconnect switching methods and arrangements for PhotoVoltaic (PV) panels are disclosed. A determination is made as to whether a reconnect condition, for reconnecting a PV panel to a power system from which the PV panel is disconnected, is satisfied. The PV panel is automatically reconnected to the power system responsive to determining that the reconnect condition is satisfied. A determination is then made as to whether a power system operating condition is satisfied on reconnection of the PV panel, and the PV panel is automatically disconnected from the power system responsive to determining that the power system operating condition is not satisfied on reconnection of the PV panel.

The invention proposes a control device (20) generating electrical signals of the type comprising a bottom support (22), a first, a second, and a third fixed contacts, a first (48-1), a second (48-2), and a third (40) moving contacts, each of which is elastically deformable, an intermediate control cradle (24) which comprises a first (62-1), a second (62-2) and a third (66) actuating pawls, which is suitable for occupying an inactive position in which at least one first (S1), one second (S2) and one third (S3A, S3B) bearing points of the intermediate cradle (24) are in abutment, vertically upwards, each against an associated surface portion facing the bottom support (22), and a single top control member (26) in the form of a drum.

A power feeding path switching device includes a relay (RL1). The relay becomes excited when a power supply current flows across the relay in a first direction of a power feeding path, and becomes unexcited when a power supply current flows across the relay in a second direction opposite to the first direction, or when a power supply current does not flow across the relay. The relay in an unexcited state connects the power feeding path with ground, and the relay in an excited state does not connect the power feeding path with ground.

In a switch module which is arranged in opposition to a key substrate, the switch module is provided which is able to reduce an amount of light leaking out from the vicinity of an edge portion of a light reflection member in the direction of key parts, so that the key parts can be illuminated in a uniform manner by the light which advances in the interior of a light guiding member. A switch module (1) is provided with a circuit substrate (6) that has a metal dome sheet (4) mounted on a surface thereof which is arranged in opposition to a key substrate (8), a light guiding sheet (4) that is arranged between the key substrate (8) and the circuit substrate (6), an LED (2), and a reflector (9) that makes the light emitted from the LED (2) incident into the light guiding sheet (3) from an end thereof, wherein key parts (7) are able to be illuminated by the switch module 1. At an inner side of the reflector (9) in the light guiding sheet (3), there is formed a printed pattern (12) of white ink for scattering light on an optical path of the light which transmits through a first surface (3b) from the vicinity of an edge portion of the reflector (9).

A housing of a circuit breaker, which is satisfactory in impact resistance and can be applied to high breaking capacity use, and is satisfactory in flame retardancy and strength properties and exhibits less mottled blooming.

The base of a circuit breaker includes 20 wt% of nylon 66, 9 wt% of nylon 6, 4 wt% of nylon 6T, 42 wt% of a glass fiber, 13 wt% of polybromostyrene, 4 wt% of antimony trioxide, 8 wt% of an ethylene/α-olefin copolymer, and 0.3 wt% of carbon black.

There is disclosed a switch including a molded article composed of a flame retardant material, which flame retardant material includes from 35 to 50% by weight of a resin, from 20 to 60% by weight of a reinforcement, from 5 to 40% by weight of an inorganic compound and from 0.3 to 1.8% by weight of red phosphorus flame retarder, and which inorganic compound undergoes dehydration reaction at temperatures equal to or higher than a predetermined temperature. The switch according to the invention is satisfactory in flame retardancy and resistance to metal contamination or metal corrosion.

Die Erfindung betrifft eine Kontaktbrückenhalterung für elektrische Schaltgeräte, insbesondere für häufig schaltende Schaltgeräte, wie Schütze. Durch hitzebeständige flächige Zwischenelemente (28), die zwischen der den zugehörigen Festkontakten (18; 28) zugewandten Seite jeder Kontaktbrücke (8) und den zugehörigen Anlagebereichen der fensterartigen Ausbrüche (6) des Kontaktbrückenträgers (4) wird ein Anbacken, Anschmelzen oder Verschweißen zwischen den erhitzen, in ihre Offenstellung bewegten Kontaktbrücken (8) und dem Kontaktbrückenträger (4) sowie eine Verformung des Kontaktbrückenträgers (4) in diesen Bereichen verhindert.