摘要:
A high- and medium-voltage gas-insulated switchgear device, the peculiarity of which resides in the fact that it comprises a casing which contains: at least an interruption unit having at least one fixed contact and one moving contact which can couple each other, and first actuation means which are operatively connected to the moving contact; at least a disconnection unit electrically connected to the interruption unit, having at least one fixed contact and one moving contact which can couple each other, and second actuation means which are operatively connected to the moving contact; and in that at least one of said actuation means comprises a motor with position control.
摘要:
A power supply device for an electronic protection unit for AC/DC low- and/or medium-voltage power networks, comprising: first electronic means, which are suitable to transduce electric power from an AC/DC low- and/or medium-voltage power distribution line in nominal operating conditions; and second electronic means, which are suitable to transduce energy from an AC/DC low- and/or medium-voltage power distribution line in current transient conditions.
摘要:
A circuit breaker comprising at least one moving contact and at least one fixed contact, an actuator for moving the moving contact, said circuit breaker comprising an active device which is operatively connected to the moving contact and is suitable to modulate the motion of the moving contact by applying an adjustable force.
摘要:
A device for interrupting and protecting a load supply circuit against ground faults, comprising: an interruption unit which has input terminals for connection to a load supply circuit, and at least one fixed contact and one moving contact which are operatively connected to actuation means for opening/closing the power supply circuit; a residual-current protection unit, operatively associated with the interruption unit and comprising a current sensor which is suitable to detect the presence of a residual current, and a control unit which is operatively associated with the sensor and with the actuation means and is suitable to check whether the detected residual current is higher than a preset limit and to cause, in this case, the intervention of the actuation means; the particularity of which resides in the fact that load supply conductors are directly connected to output terminals of the interruption unit and that the current sensor is arranged directly on the conductors.
摘要:
An accessory device for protection against permanent overvoltages in a low voltage power distribution line. The accessory device is aimed at coupling to a RCCB, which comprises:
a couple of a electrical contacts including a fixed contact and a movable contact, said movable contact being uncoupled from said fixed contact, during an opening operation of said RCCB; and sensor means, suitable to generate one or more sensing signals, which are indicative of the presence of an imbalance current between the phase and/or neutral conductors of said power distribution line; and release means, which are electrically coupled to said sensor means, said release means being operatively connected to said movable contact in order to uncouple said movable contact from said fixed contact upon activation by said sensor means.
The accessory device, comprises first electronic means, suitable to generate an electrical intervention signal, when the voltage value of the power distribution line exceeds a first preset threshold value. The electrical intervention signal is suitable to determine an opening operation of the RCCB, so as to provoke the interruption of the power distribution line.
摘要:
A device for interrupting and protecting a load supply circuit against ground faults, comprising: an interruption unit which has input terminals for connection to a load supply circuit, and at least one fixed contact and one moving contact which are operatively connected to actuation means for opening/closing the power supply circuit; a residual-current protection unit, operatively associated with the interruption unit and comprising a current sensor which is suitable to detect the presence of a residual current, and a control unit which is operatively associated with the sensor and with the actuation means and is suitable to check whether the detected residual current is higher than a preset limit and to cause, in this case, the intervention of the actuation means; the particularity of which resides in the fact that load supply conductors are directly connected to output terminals of the interruption unit and that the current sensor is arranged directly on the conductors.
摘要:
A connection device for a low-voltage power circuit breaker, wherein the circuit breaker comprises: a fixed part, provided with terminals for connection to an electric circuit in which the circuit breaker is inserted, and with disconnection contacts; a movable part, which can be coupled to the fixed part and comprises an auxiliary module which has contact means, and an interruption block which contains at least one fixed contact and a moving contact which can be mutually coupled and are electrically connected to the contact means; its particularity consists of the fact that is comprises a first conducting element which is suitable to be connected to a corresponding disconnection contact and a second conducting element which is suitable to be connected, respectively, to the first conducting element and to the contact means.
摘要:
A support for cellular telephony antennas, whose particularity consists of the fact that it comprises: a base supporting element, which lies substantially vertically and can be operatively connected to an anchoring surface; and coupling means for the connection of at least one antenna, which are suitable to operatively interconnect, in a substantially bracket-like fashion, the antenna to the base element.
摘要:
A supporting base for a low-voltage power circuit breaker of the draw-out or removable type, comprising a substantially parallelepipedal body that has a rear wall, a front wall, two side walls, an upper wall and a lower wall, first and second terminals being provided respectively on the upper and lower walls in order to provide direct or indirect electrical connection to corresponding conductors of a power supply circuit; its particularity consists of the fact that third and fourth terminals are provided on the front wall and are suitable to facilitate electrical coupling to corresponding coupling terminals provided on the circuit breaker, the thrid and fourth electrical terminals being spaced from and electrically connected to, respectively, the first and second terminals.
摘要:
A multipole current limiting circuit breaker comprising an insulating enclosure that contains: a) for each pole, at least one fixed contact and at least one movable contact, which can be mutually coupled/uncoupled upon closure/opening of the circuit breaker; b) actuation means which provide the energy for moving said movable contacts and determines their coupling/uncoupling with the corresponding fixed contacts, said actuation means comprising a rotating actuation bar that is operatively coupled to the movable contacts of the poles; characterized in that said movable contacts have a fork-shaped body having a base element that supports two arms provided with plates for electrical contact with corresponding coupling surfaces of the fixed contact, and in that said fork-like body is connected to the actuation bar by virtue of elastic means accommodated at least partially in a seat formed in the bar, said elastic means being anchored to said bar and being fixed to said base element so as to support the movable contact and facilitate a substantially uniform distribution of the pressure applied by the contact plates to said corresponding coupling surfaces of the fixed contact.