摘要:
A control apparatus for controlling electrical switchgear, the control apparatus being designed such that it is capable of performing the following in succession: during an opening stage for opening the moving contact, causing the connection end for connection to the moving contact and provided on an output member to go from the point P1 to the point P2, under the effect of an opening mechanical spring moving a moving abutment element that drives the output member by abutment; during a re-cocking stage for re-cocking the spring, moving the moving abutment element under the effect of switching on a motor, while keeping the connection end at the point P2; and during a closure stage for closing the moving contact, causing the connection end to go from the point P2 to the point P1, also under the effect of switching on the motor.
摘要:
An alternator disconnector circuit-breaker of the invention presents a resistance (30) in series with the circuit-breaker switch (20′); the resistance (30) is of fixed ohmic value that is about 104 times greater than the value of the resistance of the main circuit of the circuit-breaker. By means of this configuration, it is possible to use a vacuum chamber as the circuit-breaker switch (20′), and to dimension the main switch (10), which, de facto, breaks the current even for very high short-circuit currents, under more advantageous conditions.
摘要:
In an electrical connection for high-voltage or medium-voltage switchgear, a bar (2) is inserted in a recess (6) provided with a projection (10). In the invention, the dimensions are established so that the axes (AA, BB) of the bar (2) and of the projection (10) can be inclined relative to each other. Spring-forming conductor elements (12, 14) establish the electrical connection even in the event of tilt. A high-performance electrical contact can thus be obtained compactly, which makes it possible to perform assembly/disassembly operations on electrical equipment without any additional element of the telescopic ferrule or separable bar type.
摘要:
A switch unit comprising a circuit breaker and a disconnector disposed in one plane and fixed to a metal casing.Common drive means comprise: a single insulating drive bar adapted to move in a straight line in the same plane as the plane of straight line movement of the movable contacts of the circuit breaker and disconnector; and at least one mechanical assembly mounted in the metal casing, at least part of the mechanical assembly being driven by the single insulating drive rod while permitting non-simultaneous straight-line movement of the two movable contacts.
摘要:
An alternator disconnector circuit-breaker of the invention presents a compact structure. The axes of opening/closure of the change-over first switch (12, 14), of the circuit-breaker second switch (22, 24), and of the disconnector switch (32, 34) are such that an angle of 90° is present between two of them. Actuator means (40) associated with synchronization means (52, 54, 56, 58) make it possible to ensure that each switch is operated in a time-shifted manner by common control means.
摘要:
A first switch (10) has a first pair of contacts (12, 14) that are mounted to move relative to each other in translation. A circuit-breaker second switch (20) has a second pair of contacts (21, 24) that are mounted to move relative to each other in translation, the second switch (20) being put in parallel with the first switch (10). A disconnector third switch (30) has a third pair of contacts (32, 34) that are mounted to move relative to each other. Synchronization means (50, 50′) make it possible, while breaking is taking place, for the contacts of the first switch (10) to separate before the contacts of the second switch (20) separate, the contacts of the second switch themselves separating before the third contacts (32, 34) separate fully. The synchronization means are actuated by a servomotor (40).
摘要:
In order to reduce the breaking energy of a high-voltage or medium-voltage circuit-breaker, the interrupting chamber (10) contains two contacts (12, 14) mounted to move in opposite directions, and actuated via a single device (20). The two contacts (12, 14) are surrounded by an insulating casing (18) of tubular shape, coupled in fixed manner to the main contact (12). The contacts (12, 14) are actuated by a device having a lever (24) in which each lever arm is coupled to a link, one of the links (32) being secured to the insulating casing (18) and the other link (34) being secured to the second contact (14). The guiding of the drive tube (18) on the main contacts (12b, 14b) makes it possible to improve breaking by keeping clean gas between said main contacts.
摘要:
A switch unit comprising a circuit breaker and a disconnector disposed in one plane and fixed to a metal casing.Common drive means comprise: a single insulating drive bar adapted to move in a straight line in the same plane as the plane of straight line movement of the movable contacts of the circuit breaker and disconnector; and at least one mechanical assembly mounted in the metal casing, at least part of the mechanical assembly being driven by the single insulating drive rod while permitting non-simultaneous straight-line movement of the two movable contacts.
摘要:
The present invention relates to an electrical insulator (1) comprising a tube (3) surrounded by an insulating sheath (5) that may be smooth or provided with fins (7). The insulating sheath is composed of a filled, hardened, flexibilised, hydrophobic, cycloaliphatic epoxy resin containing from 25 to 75% by weight of mineral filler. The process for manufacturing this insulator comprises the steps consisting of installing the insulator tube or a precursor of the tube, in an electrical insulator mould possibly provided with fins, feeding the filled unhardened hydrophobic cycloaliphatic epoxy resin in the mould so as to form the sheath and the fins of the insulator around the said tube or its precursor, hardening the resin inserted in the mould so as to obtain the insulator, and extracting the insulator obtained from the mould. The electrical insulator according to the invention can be used in a high voltage application.
摘要:
A device for the actuation of the movable contacts of a hybrid circuit breaker allows the following time diagram to be implemented: command the opening of the interrupting chamber, offset the opening of the vacuum switch so as to allow the interrupting chamber contacts to separate at a minimum speed and in a way that is synchronous with the separation of the vacuum switch contacts, close the vacuum switch while keeping the interrupting chamber in the open position. Moreover, closing the interrupting chamber does not act upon the contacts of the vacuum switch.