JPS6347096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a contact opening control device having a Thomson effect thrust member (a member driven by electromagnetic repulsion) that rapidly moves a movable mechanism in the direction of opening a contact; and a device for locking the mechanism in the open position (locking the mechanism in a fixed state), and the conductive unlocking disc is moved to the unlocking position by supplying power to the winding for unlocking (releasing the locking state). The present invention relates to a high-speed shear disconnector equipped with an unlocking mechanism whose disc is placed at a rest position facing the front (front end surface) of the unlocking winding at a small distance so as to be repelled by the locking winding.

Known severance cutters of the type mentioned above (French patent no.
No. 2377087) uses the Thomson effect to rapidly open a contact to limit short-circuit current, and to maintain the open position of the contact against the biasing force of a closing spring that tends to return the released contact to the closed position. This is made possible by a controlled locking device. Attempting to rapidly move the contact points through abrupt control may generate an impact, which may cause an inadvertent unlocking operation. The rapid release of the contacts creates an impact, which is transmitted through the unlocking coil to the unlocking disc, which moves to the unlocking position and activates the movable mechanism. The movable mechanism may cause the contacts to return to the closed position. Such malfunctions can have serious consequences.

The present invention aims to eliminate such drawbacks and realize a high-speed shingle disconnector that operates reliably.

The high speed shear disconnector according to this invention has a shock prevention device 3.
2, 34, 38, this device 32, 34, 3
8 includes a return spring 34 cooperating with the unlocking disc 24, the action of which returning the unlocking disc 24 to the rest position is limited by a stop member 30; Thereby winding 2
The front side (front end surface) of 6 and the disk 2 facing it
A small gap is formed between 4 and 4.

A gap is created between the disk 24 and the front surface (front end surface) of the winding 26;
It has been confirmed that the repulsion force of the disk 24 due to the Thomson effect generated when discharging through the tube is not actually affected, that is, the repulsion force is not weakened. On the other hand, this small gap prevents the impact from being transmitted to the disc 24 in the unlocking direction, and eliminates the risk of the disc being opened inadvertently.

A return spring returns the conductive disc to its rest position.
It is preferable to act on the head of the headed pin which is in contact with the front side of the winding. In order to precisely limit the play between the disk and the winding, the length or height of the headed pin is slightly greater than the height of the disk. A spacing spring having a force considerably less than that of the return spring springs the disk away from the winding. The headed pin transmits the impact directly to the strong return spring, which serves to dampen the impact. Of course, a plurality of headed pins and return springs can be placed along the outer periphery of the disk, with the pins passing through holes in the disk.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

In particular, in the accompanying drawings, which partially correspond to the drawings of the above-mentioned French patent No. 2377087,
Two movable contacts 10 are shown. This contact point 10
can be moved to the open position by means of a Thomson effect control device, which includes a conductive disk 14 arranged in a closed contact position opposite the control winding 16 . This disc 14 is connected to a control rod 18, one end of which is adapted to impinge on the movable contact 10, and the other end cooperating with a locking device comprising a wedging roller 20. These rollers 20 can be moved to an unlocked position by pushers 22, which are carried by electrically conductive discs 24, which are in a rest position opposite the front side of the winding 26. It is located in

To understand the operation of this breaker, reference is made to the above-identified patents. Here, the opening control by discharging through the winding 16 from the capacitor is carried out very rapidly due to the Thomson repulsion effect of the conductive disc 14, and the movable contact 10 is connected to a locking device with rollers 20. Note that it is therefore held in the open position. Power is supplied to the winding 26 to cause repulsion of the disk 24, and the roller 20
Closing of the switch is carried out by moving the rod 18 to the unlocked position and closing the movable contact under the action of the closing spring.

The shock prevention device includes a pin portion 32 and a return spring 34, each passing through a hole made in the disk 24.
It includes a headed pin 28 having a head portion 30 which is held in contact with the disk 24 by a pin. The length of the pin portion 32 is slightly larger than the thickness of the disk 24, and the lower end of this pin portion 32 is connected to the disk 24.
protrudes from the lower surface of and comes into contact with the front of the winding 26,
A small gap 36 is provided between the disk 24 and the winding 26.
It is designed to provide the following. Winding 26 and disk 24
A spacing spring 38 is interposed between the disk 24 and the disk 24 to spring the disk 24 upward in the figure and bring it into contact with the head portion 30 of the headed pin 28. In the rest position shown, the stress in the return spring 34 is
It is transmitted directly to the winding 26 by means of a headed pin 28 which rests on the front side of the winding 26. The pusher 22 and disk 24 component is forced upwardly by a spacing spring 38, the force of which is substantially lower than the force of the return spring 34. The thickness of the gap 36 can be very small, for example a few tenths of a millimeter, but this gap completely prevents mechanical contact between the parts 24 and 26. 2 along the outer periphery of the disk 24.
It is clear that one or more headed pins 28 can be arranged, the pin portions 32 of which can come into contact with the metal frame of the winding 26.

The shingle breaker according to the invention operates as follows.

When the device is in the closed position shown, the shock experienced by the pole 12, especially due to the sudden opening due to the Thomson effect, is transferred by the winding 26 to the headed pin 28.
is transmitted to the return spring 34. Since the disc 24 is not in contact with the winding 26, the roller 20 normally locks the movable mechanism in the open position without receiving any shock that would try to move it towards the unlocked position. Implemented. Note that the spacing spring 38 cannot transmit large impact effects. This would not be the case if the force of the separation spring 38 were comparable to the force of the return spring 34.
Unlocking is normally performed by supplying power to the winding 26. In that case, the disk 24 is repelled against the force of the return spring 34. Also, these return springs 3
4 acts on the head 30 of the headed pin 28 to return the conductor disc 24 to its rest position as soon as the unlocking operation is completed.

This anti-shock device has a particularly simple structure and does not affect the operation of the switch at all. The head portion 30 of the headed pin 28 constitutes a locking member which, together with the locking member consisting of the winding 26, surrounds the conductor 24 with a small gap.
Movement of the headed pin 28 towards the winding 26 is limited by its pin portion 32. It is clear that the unidirectional movement restriction of the movable member 30 can be implemented by any other operation mode.

[Brief explanation of drawings]

The attached figure is an axial sectional view of a rapid shear disconnector equipped with an impact protection device according to the invention. 10... Movable contact, 12... Pole, 14... Conductive disk, 16... Winding wire, 18... Rod, 2
0... Roller, 22... Pusher, 24... Conductive disk, 26... Winding wire, 28... Pin with head, 30... Head portion, 32... Pin portion, 34
...Return spring, 36...Gap, 38...Separation spring.

Claims (1)

[Scope of Claims] 1. An opening device that opens the contact 10 and a latching device 20 that latches the open state, the opening device having an electromagnetic repulsion drive for rapidly moving the movable part in the direction of opening the contact. members 14, 16, the latching device 20 is for latching the movable part in the open position of the contacts, and the latching device 20 has a latching release drive with a conductive disk 24 for unlatching. devices 24, 26, the drives 24, 26 being arranged so that when the unlatching winding 26 is energized, the unlatching disk 24 is repelled in the unlatching direction. In a high-speed breaker installed in a stationary position at a small distance from the front end face of the winding 26, a shock preventing device 32, 34, 38 having a return spring 34 and a spacing spring 38 is provided, the return spring 34 The elastic force of is larger than that of the separation spring 38, and the return spring 34 operates together with the disk 24, and when the disk 24 is in the rest position, the spring 34 with respect to the disk 24
The restoring action is limited by the head 30 which can only move in one direction, so that in the rest position the disc 24 is connected to the head 30 and the winding 2.
6, and the spacing spring 38 connects the disk 24 to the winding 26.
1. A high-speed shingle disconnector, characterized in that it is moved to a state in which it is in contact with a head portion 30 that is spaced apart from the front end surface of the head. 2. In the high speed shear breaker according to claim 1, the movable head portion 30 is configured as the head of a pin 28, and the pin 28 is slightly larger than the thickness of the disk 24. Features a high speed breaker.