摘要:
A switching device (1) for low or medium voltage electric power distribution networks, said switching device comprising: - at least an electric pole (2) comprising a movable contact (4) and a fixed contact (5), which are coupleable/decoupleable one to another; - a circuit assembly (6), which comprises a chain (60) of semiconductor devices (601, 602, 603, 604, 605, 606) adapted to switch in an ON state or in an OFF state depending on the voltage applied thereto, said semiconductor devices being electrically connected in series one to another in such a way that a current can flow according to a predefined conduction direction (CD) when said semiconductor devices are in an ON state. The circuit assembly (6) comprises an input terminal (61), an output terminal (62) and at least an intermediate terminal (63) electrically connected with at least an intermediate electric node (64) positioned between two subsequent semiconductor devices (602, 603, 604, 605). The input terminal (61) is electrically connected with said fixed contact; The input terminal (61), the output terminal (62) and the at least an intermediate terminal (63) are electrically coupleable/decoupleable with/from said movable contact (4) when said movable contact reaches different positions (P 1 , P 2 , P 3 , P 4 ) during a movement towards/away from said fixed contact (5) in such a way that different groups (611, 612) of semiconductor devices switch in an ON state or in an OFF state at different instants (t 2 , t 3 , t 4 , t 6 , t 7 , t 8 ) during the movement of said movable contact, depending on the position reached by said movable contact.
摘要:
A DC breaker 1 includes a mechanical disconnection switch 2 provided at a power transmission line 100, a mechanical circuit breaker 20 connected in series to the mechanical disconnection switch 2, and a parallel circuit 3 connected in parallel with the mechanical disconnection switch 2 and the mechanical circuit breaker 20. The parallel circuit 3 includes a semiconductor circuit breaker 4 that changes a supply or a breaking of the current from the power transmission line 100 to the parallel circuit 3, and a reactor 55 connected in series to the semiconductor circuit breaker 4. An H-bridge circuit 5 which connects one point between the mechanical disconnection switch 2 and the mechanical circuit breaker 20 to one point between the semiconductor circuit breaker 4 and the reactor 55 is provided. The H-bridge circuit 5 includes an H-bridge unit 50 including a plurality of switching elements 51 and a capacitor 53. The H-bridge circuit 5 controls the current flowing through the mechanical circuit breaker 20 by an output voltage control.
摘要:
Provided is a DC current breaker having a high-speed breaking function appropriate to a voltage-type converter and a DC current breaking method. In addition, provided is a DC current breaker and a DC current breaking method capable of reducing cost of the breaker and securing economical competiveness by using a relatively simple configuration. The DC current breaker for breaking a DC current at the time of occurrence of an accident includes: a main conduction unit including three high-speed mechanical switches installed to be connected in series to a main conduction path for conducting a normal-operation-state current; a power semiconductor switch installed to be connected in parallel to one high-speed mechanical switch among the high-speed mechanical switches installed in the main conduction unit for current breaking of the main conduction unit; a capacitor installed on a circuit connected in parallel to the main conduction path; and a surge arrester installed to be connected in parallel to the capacitor connected in parallel to the main conduction path. The DC current breaking method uses the DC current breaker.
摘要:
A high voltage circuit breaker is presented. The circuit breaker includes a vacuum interrupter module, a drive module, and an actuator. The vacuum interrupter module includes a vacuum interrupter housing and at least two electrical contacts in the vacuum interrupter housing - where at least one of the two electrical contacts is movable relative to the other allowing the two electrical contacts to engage and disengage one from another for switching on and off a high voltage. The drive module includes a drive module housing and an electrically insulating drive member, at least a part of the electrically insulating drive member being contained in the drive module housing insulating said part from ambient air, with said electrically insulating drive member being coupled with the at least one movable contact. The actuator is coupled to the electrically insulating drive member for providing a relative movement of said at least two electrical contacts.
摘要:
A switching apparatus (30) comprises a plurality of parallel-connected current-conductive branches (32), each current-conductive branch (32) including at least one respective gas tube switch (34), wherein the switching apparatus (30) further includes an electrical circuit, the electrical circuit including at least one switching element (36) configured to be operable to selectively synthesise a or a respective voltage difference in series with one or more of the gas tube switches (34) so as to control the distribution of current between the current-conductive branches (32).
摘要:
The invention relates to an interrupter device (10) for interrupting a direct current between a direct-current source (2) and an electric device (6), in particular between a photovoltaic generator and an inverter. The interrupter device (10) comprises a mechanical switch (16) which has a first fixed contact (18), a second fixed contact (20), and a contact bridge (22) that can be moved between a first position (32) and a second position (34). In the first position (32), the first fixed contact (18) and the second fixed contact (20) are electrically contacted by means of the contact bridge (22), and in the second position (34), the contact bridge (22) is arranged at a distance from the first fixed contact (18) and the second fixed contact (20). The contact bridge (22) and the first fixed contact (18) are electrically contacted by a semiconductor switch (40) which blocks a current when the contact bridge (22) is in the first position (32). A control input (44) of the semiconductor switch (40) is connected to the mechanical switch (16) such that an arcing voltage (64) generated as a result of an arc (60) across the switch (16) connects the semiconductor switch (40) so as to conduct a current when the contact bridge (22) is moved into the second position (34).
摘要:
The at least one spring is operatively connected to the rotating element in such a way to tilt towards the rotation axis moving above a surface of the rotating element which is transversal to the rotation axis, during the rotation of the rotating element from the first position to the second position.
摘要:
A servo actuator controlling system includes a master controller and a number of servo actuators coupled to at least one interface of the master controller. The master controller includes a master MCU and a number of interfaces connected to the master MCU via a first bus. Each servo actuator includes a servo MCU, a first interface coupled to the servo MCU via a second bus, a second interface coupled the first interface and the servo MCU, a first servo switch connected between the first interface and the servo MCU, and a second servo switch connected between the second interface and the servo MCU. The first servo switch is set to turn on or off the first interface and the second servo switch is set to turn on or off the second interface.
摘要:
In accordance with an example embodiment of the present invention, a system is disclosed. The system includes a sensing unit adapted to perform measurement of a parameter and produce an electrical signal based on the measurement; a memristive unit electrically coupled to the sensing unit and adapted to receive the produced electrical signal from the sensing unit, wherein the memristive unit is further adapted to produce a cumulative value of the received electrical signal over time; and a processing unit electrically coupled to the memristive unit and adapted to receive the produced cumulative value from the memristive unit, wherein the processing unit is further adapted to digitize the received cumulative value. A method and apparatuses are also disclosed.
摘要:
The invention relates to a circuit breaker for interrupting an electrical circuit when current limit values are exceeded, said circuit-breaker having a current sensor for determining the electrical current flowing through the circuit-breaker and being connected to a control device of the circuit-breaker. When current limit values are exceeded, the electrical circuit is interrupted. Defined are: a nominal current of the circuit-breaker; a first current limit value, which is a multiple of the nominal current and which, when exceeded, results in an immediate interruption; a second current limit value, which is less than or equal to the nominal current and which, when exceeded, results in a time-delayed interruption, such that the second interruption time reduces as the current increases. The circuit-breaker has only one control element for setting a current limit value, said element defining the second current limit value for the time-delayed interruption of the electrical circuit. The other parameters are either set in a fixed manner and/or are related to the settable or set second current limit value Ir.