Abstract:
The subject of the invention is a modular subsea power distribution system to which many individual subsea load units can be connected. A modular subsea power distribution system (1) comprises a base module (7) to which a load unit (10) is connected through a connection element (11) having a form of a split core transformer (11'/11") whose primary windings (13a) and a first part of the core (12a) are permanently attached to the base module (7) and the secondary windings (13b) and a second part of the core (12b) are permanently attached to the load unit (10). The invention is characterized in that the primary windings (13a) and secondary windings (13b) of the split core transformer (11'/11") are situated coaxially one within the other when the load unit (10) is connected to the base module (7) and at the same time the first part of the core (12a) and the second part of the core (12b) form closed magnetic core (12).
Abstract:
The invention deals with a method and device for controlling the ignition of electric arc in the intercontact break of a disconnector during the operation of opening and closing the disconnector used in gas-insulated switchgear. The invention is characterized by the control of the supply of additional pulses of electromagnetic radiation energy to the intercontact break of the disconnector depending on instantaneous voltage values uS(t) measured on the incoming side of the disconnector or depending on instantaneous voltage values uS(t) on the incoming side of the disconnector and instantaneous voltage values uL(t) on the load side of the disconnector, with defined voltage threshold values (U1, U2) and preset time boundary values (T1, T3) during opening the disconnector or (T2, T4) during closing the disconnector, while the preset time values (T1, T3) include time moments in which the supply of energy pulses to the intercontact break is stopped, and the preset time values (T2, T4) include time moments in which supply of energy pulses to the intercontact break starts.
Abstract:
The subject of the invention is a device for suppressing very fast transients (1,1a, 1b), applicable in protecting electric and/or electric power equipment, and especially transformers operating in electric power substations and in wind power plants, connected in the supply network circuit downstream of the circuit breaker and upstream of the protected equipment. The device according to the invention is a component of an induction character (1, 1a, 1b), comprising a high-frequency magnetic core (2) arranged around the current-conducting lead (3). On the magnetic core (2) there is wound at least one winding (4, 4a) with at least one pair of terminals (6) used for connecting at least one damping resistor (7). The inventive device contains an insulating body (8) in which there is located a magnetic core (2) together with a damping resistor (7) and a winding (4, 4a) or contains an insulating body (8a) in which there is located a magnetic core (2) together with a damping resistor (7), a winding (4, 4a) and a section of a current-conducting lead (3).
Abstract:
The subject of the invention is a cover (2) with an electrical lead through connector (1) for connecting MV or HV conductor (7) with a load (4) placed in a tank containing a dielectric liquid or dielectric gas. An electrical lead through connector (1) comprises a plug-in bushing member (5) made of insulating material, where a series filtering choke (6) is embedded. The filtering choke (6) has a first terminal (6a) which is electrically connected with an external HV or MV line (7) and has a second terminal (6b) which is connected to a load (4) placed inside the tank (3). The lead through connector (1) is further provided with an additional bushing member (9) which is mechanically connected with the plug-in bushing member (5) through a common insulating base (8). The additional bushing member (9) is equipped with a conductor (10) located inside the bushing member (9), where the conductor (10) is directly connected with the second terminal (6b) of the filtering choke (6) and with an external protective component (11) against electrical surges.
Abstract:
A transformer (10) includes a ferromagnetic core (14); winding structure (12) mounted on the core; electrical terminals (40, 40') connected to the winding structure; a fast transient mitigator circuit (52) including an impedance circuit serially connected between one of the terminals and the winding structure, and a capacitor connected from the one terminal to external ground. The mitigator circuit is constructed and arranged to reduce a frequency spectrum and magnitude of fast transients. An encasement (16), of an insulating resin, encapsulates the core, the winding structure and at least the impedance circuit of the mitigator circuit.
Abstract:
The subject of the invention is a device for suppressing very fast transients (1,1a, 1b), applicable in protecting electric and/or electric power equipment, and especially transformers operating in electric power substations and in wind power plants, connected in the supply network circuit downstream of the circuit breaker and upstream of the protected equipment. The device according to the invention is a component of an induction character (1, 1a, 1b), comprising a high-frequency magnetic core (2) arranged around the current-conducting lead (3). On the magnetic core (2) there is wound at least one winding (4, 4a) with at least one pair of terminals (6) used for connecting at least one damping resistor (7). The inventive device contains an insulating body (8) in which there is located a magnetic core (2) together with a damping resistor (7) and a winding (4, 4a) or contains an insulating body (8a) in which there is located a magnetic core (2) together with a damping resistor (7), a winding (4, 4a) and a section of a current-conducting lead (3).