Abstract:
A joint including two sections of an electric power cable, each cable section including at least one core member surrounded by a first armoring layer for protecting the core member from tensile forces acting on the cable, the first armoring layer including a plurality of armoring wires arranged along the length of the cable and twisted in a first direction with respect to the longitudinal direction of the cable. The joint includes at least one core joint between the core members of the cable sections, and an outer mechanical casing surrounding the at least one core joint and mechanically connected to the first armoring layers of the cable sections, and a second armoring layer positioned in an area neighboring the casing, surrounding at least one of the cable sections, and having one end mechanically connected to the casing and the other end terminated at a distance from the casing.
Abstract:
An actuator for a tap changer of an electrical transformer, including a piston, being hollow to define a piston space; a cylinder arranged around the piston such that the piston is arranged to be movable axially into and out of the cylinder; a piston ring fixed to the outside surface of the piston such that a cylinder space is formed between the piston and the cylinder and delimited by the piston ring, the cylinder space having a variable volume which is configured to vary with axial movement of the piston; and a spring engaging both the piston and the cylinder such that the spring is able to be compressed and elongated, respectively, with axial movement of the piston. The piston space is connected to the cylinder space via at least one hole through the hollow piston. The piston space is connected to an outside of the piston.
Abstract:
A three-phase stacked triangular transformer core is provided. The transformer has three legs and six yoke parts therebetween, wherein the legs include stacked laminations. In a cross-sectional plane perpendicular to a central transformer core axis, the stacked laminations are oriented in substantially radial direction, and each leg has two leg halves, wherein each leg half has a plurality of outer corners facing a corresponding leg half of a neighboring leg. For each of the leg halves the plurality of outer corners lie on a respective straight line within a lateral tolerance, and for each leg half the straight line defined by this leg half and the straight line defined by the corresponding leg half of the neighboring leg are parallel.
Abstract:
A method is disclosed of performing point on wave switching in a multiphase electrical system having a first circuit breaker connected a first bus, the first circuit breaker being operated by a first controller, a second circuit breaker connected to a second bus, the second circuit breaker being operated by a second controller, and a subsystem transferred from the first bus to the second bus. The method can include receiving, by the second controller, system characteristics data of the subsystem, estimating, by the second controller, a time for switching based on the received system characteristics data of the subsystem and operating time of the second circuit breaker, and operating, by the second controller, the second circuit breaker at the estimated time for switching, for switching the subsystem.
Abstract:
A modular voltage source converter (100) comprises a plurality of cells conformal to a basic cell design comprising a first and a second terminal, a capacitor and at least two switches arranged in a half-bridge or full-bridge configuration. In the converter, a first group is formed by a number n of cells (101-k, k=1, . . . , n) connected serially at their terminals, and a second group is formed by an equal number n of cells (102-k, k=1, . . . , n) connected serially at their terminals. The terminals of the cells (101-k) in said first group are connected, via a resistive or inductive connection element (110-k), to the terminals of corresponding cells(102-k) in said second group.
Abstract:
The present invention discloses an electronic inductance circuit for the power supply of a 2-wire bus intercom system and a device thereof. The electronic inductance circuit comprises a main circuit path along an inductor and a source terminal and a drain terminal of a FET between the input terminal and the output terminal of said electronic inductance circuit, in which said inductor is connected to said source terminal of said FET; a resistor and a freewheeling diode individually connected to said inductor in parallel; and a secondary circuit path along a capacitor connected with a second resistor in series between said input terminal and said output terminal, which is connected to said main circuit path in parallel. The solutions of the present invention achieve larger direct current power supply for the 2-wire intercom system and stable alternating current impedance with fast response to the DC power supply.
Abstract:
An exemplary energy auditing system and a method for obtaining a validated performance solution for a plant are provided. An exemplary system and method includes at least one processor that obtains plant data for calculating one or more performance metrics. An initial benchmark is generated using performance metrics, a tunable process model and an optimizer. A rules engine is used for applying rules based on a dynamic input on the initial benchmark and current performance metrics, and for generating an output. A decision analysis module is used for validating if the output meets the specifications of the dynamic input using a what-if analysis. If the specifications are met, then the output is provided as a validated performance solution. If the specifications are not met, then the benchmark is evolved and the validating steps are repeated.
Abstract:
Stripping structure strips insulation from ends of a plurality of leads of a lead bundle. Each lead includes a conductor member coated with the insulation. The structure includes a housing having wall structure defining a stripping chamber, an inlet in fluid communication with the stripping chamber, and an outlet in fluid communication with the stripping chamber. A cover has an opening for receiving an end of the lead bundle in a sealing manner so that the leads thereof are received in the stripping chamber. Chemical stripping solution is in communication with the inlet. When the lead bundle is received through the opening with the leads in the stripping chamber and when the chemical stripping solution is provided though inlet and in the stripping chamber, the chemical stripping solution strips the insulation from the conductor members, with the stripping solution along with stripped insulation exiting through the outlet.