Abstract: The invention relates to a plug connector (300), having: a receiving element (10) for receiving a plug-in element of the first type (100) or a plug-in element of the second type (200) at least in certain areas; and - a push-pull locking system (20) for producing a push-pull locking between the connector (300) and the plug-in element of the first type (100); wherein the push-pull locking system (20) has at least one locking element (13) which is arranged at least regionally in a recess (14) of the receiving element (10) provided for the at least one locking element (13), and wherein the receiving element (10) has at least one latching means (12) which is provided and designed to with at least one complementary latching means (230) of the plug element, of the second type (200) to be brought into engagement.

Abstract: The present invention discloses a method and apparatus for photovoltaic DC direct-fed power generation based on controllable power supply. According to the present invention, the photovoltaic cells are directly connected to the DC microgrid, and the DC bus voltage is flexibly regulated by the controllable power supply in the DC microgrid to enable the photovoltaic cells to operate at the maximum power, thus eliminating the need for a DC interface converter when the photovoltaic cells are connected to the DC bus and reducing the cost and size of the distributed PV power generation system.

Abstract: A modular power distribution terminal includes an outer housing containing a chamber and a bottom opening. The outer housing includes a top wall, a pair of spaced end walls and a pair of spaced parallel side walls having first fasteners. At least one module slice is arranged in the outer housing chamber and includes a slice housing including a pair of spaced parallel side walls having first fasteners configured for fastening with the first fasteners of one of the outer housing side walls and a current bar connected with and extending along a length of the slice housing. An input screw connection terminal and at least two output push-in connection terminals are connected with the current bar.

Abstract: An adaptor is provided for connecting an electrical cable with an electrical connector. The adaptor includes a housing and an insert which are coaxially arranged and connected for free rotation relative to each other. The outer surface of the insert contains an annular recess and at least one pin is arranged on an inner surface of the housing. When a portion of the insert including the recess is arranged within a portion of the housing, the pin is inserted into the recess to connect the insert with the housing while permitting rotation therebetween. The free rotation prevent torque from being transmitted to an electrical cable connected with the insert.

Abstract: An adaptor is provided for connecting an electrical cable with an electrical connector. The adaptor includes a housing and an insert which are coaxially arranged and connected for free rotation relative to each other. The outer surface of the insert contains an annular recess and at least one pin is arranged on an inner surface of the housing. When a portion of the insert including the recess is arranged within a portion of the housing, the pin is inserted into the recess to connect the insert with the housing while permitting rotation therebetween. The free rotation prevent torque from being transmitted to an electrical cable connected with the insert.

Abstract: An elevator belt monitoring apparatus includes a housing for receiving an elevator belt and a plurality of screws or pins which are operable to pierce the belt and the spaced parallel cords arranged within the belt. One screw or pin engages each belt. A plurality of bridge contacts are connected with adjacent pairs of screws or pins and signal contacts are connected with the screws or pins adjacent to the outer edges of the belts. The signal contacts are connected with a monitoring device which sends and receives signals to the contacts to provide an indication of the condition or deterioration of the belt.

Abstract: A push-pull connector for a panel containing at least one opening corresponding with at least one circuit board includes a housing with a spring hook and a shell connected therewith. The housing has an outer surface, at least one circuit board connector arranged at a first open end thereof, and a second end configured to receive an electrical cable for connection with at least one circuit board connector. The spring hook is connected with the housing outer surface and is operable between a hold position where the housing is connected with the panel at the at least one panel opening and a release position wherein the housing is disconnected from the panel. The shell is slidably connected with the housing outer surface for displacement between a release position and a hold position, wherein the shell or housing are moved toward and away from each other to operate the spring hook toward the release and hold position, respectively.

Abstract: A rotary plug electrical connector includes a plug and a socket, both of which include power contacts and signal contacts. The plug is rotatable within the socket between operable and inoperable positions. The power contacts of the socket include opposed surfaces which are engaged by resilient blade power contacts of the plug. The signal contact of the socket preferably includes a pair of contacts, and the signal contact of the plug preferably is a bridge contact that engages the socket signal contacts in the operable position and disengages the socket signal contacts in the inoperable position. When the signal contacts are disengaged, no power is transferred by the connector.

Abstract: Disclosed is a fault current controller for a direct current power grid, which includes a primary circuit and a controller. The primary circuit includes an inductor, a filter capacitor, a resistor, an IGBT switch, a diode, a contactor and a Hall current sensor. The inductor, a first resistor and a second contactor are connected in series and are connected to a first contactor in parallel. A first branch including a second resistor and a first diode, a second branch including a third resistor and a second diode, and the inductor are connected in parallel; the filter capacitor, the IGBT switch and the first resistor are connected in parallel. The Hall current sensor is arranged in the series circuit. The controller controls the IGBT switch and the two contactors in the primary circuit to form different on-off combinations.

Abstract: Disclosed is a fault current controller for a direct current power grid, which includes a primary circuit and a controller. The primary circuit includes an inductor, a filter capacitor, a resistor, an IGBT switch, a diode, a contactor and a Hall current sensor. The inductor, a first resistor and a second contactor are connected in series and are connected to a first contactor in parallel. A first branch including a second resistor and a first diode, a second branch including a third resistor and a second diode, and the inductor are connected in parallel; the filter capacitor, the IGBT switch and the first resistor are connected in parallel. The Hall current sensor is arranged in the series circuit. The controller controls the IGBT switch and the two contactors in the primary circuit to form different on-off combinations.