KR19980013616A - Wiper control device of breaker - Google Patents

Abstract

The apparatus for controlling a wipe of a circuit breaker according to the present invention is an apparatus for controlling a wipe of a circuit breaker having an upper insulating push rod and a lower insulating push rod for vertically moving a movable contact in a vacuum convergence pipe, By providing a bolt on the rod and providing a wipe adjusting nut therebetween, the wipe was easily adjusted using only the adjusting nut.

Description

Wiper control device of breaker

The present invention relates to a wiping device for a vacuum circuit breaker (VCB). More particularly, the present invention relates to a wiping device for a vacuum circuit breaker (VCB), in particular a wiping device, The present invention relates to a wiping device for a circuit breaker.

Vacuum circuit breaker is a circuit and device protection device that quickly isolates a circuit by arc in a vacuum container (Vauum interrupter) arising from opening and closing of normal load and fault current interruption. At this time, the arc extinguisher is called a vacuum interrupter because it is executed in a vacuum in a closed container. This vacuum circuit breaker is one of the most widely used high-voltage AC circuit breakers and is mainly used in the Americas, Southeast Asia and Japan, and has various models ranging from 3 kV to 36 kV according to the rated voltage. This is a circuit breaker which improves the reliability of opening and closing operation by using a vacuum circuit breaker using a link opening / closing device, and greatly enhances the breaking performance and the opening / closing life.

As shown in Figs. 1 to 3, the vacuum circuit breaker comprises a main circuit portion 10, a mechanical portion 20, and an auxiliary device according to functions, and the main circuit portion is divided into three portions.

Firstly, there is a current interruption section 11. The most important part of the circuit breaker is the peripheral element that constitutes the contact point. The contact is composed of a movable contact and a fixed contact. The movable contact is interlocked with the moving part of the circuit breaker. When the circuit breaker is 'on', the movable contact is in contact with the fixed contact and does not suppress the current flowing in the circuit due to contact resistance. Sufficient pressure is applied to the movable contact surface. On the other hand, when shutting off, the movable contact is separated to a suitable cut-off distance at a suitable speed. Next is the insulation. The conductive part with high voltage current should be electrically insulated from the earth. When the movable contact is open, the same phase gap must be insulated. In particular, the insulation between phases is required. The insulating part having such an insulating function is usually composed of an epoxy mold or a BMC resin.

Next, there is a SOHO device. It is a part that extinguishes the arc generated when the contact of the circuit breaker is closed and the fault current is cut off. In the case of the vacuum circuit breaker, it refers to a vacuum interrupter.

Next, there is a mechanism section 20. Means a mechanical mechanism for performing the operation of opening and closing the contact point of the breaker, and means all the actuators constituted at the front of the breaker.

Finally, there is an auxiliary device. Interlocks, interlocks, withdrawals, etc., which are necessary for normal operation of the circuit breaker.

In the figure, reference numeral 15 denotes a connection terminal, 30 denotes a cradle, 31 denotes a bushing, and 32 denotes a safety shutter.

A conventional wiping device for a circuit breaker according to the related art will be described with reference to FIGS. 3 to 5. FIG.

The rotation of the mechanism driving cam 24 moves the tripping latch 25 to move the three change levers 22 provided at the end of the cross bar 23, The insulating push rod 42 fixed to the end of the change lever is pushed up by the rotation of the lever 22 to move the movable contact in the vacuum discharge tube 16 to operate the breaker. That is, when the lower support plate 46 is pushed by the pivotal piece 51 pivotably attached to the end of the change lever 22, the lower support plate 46 elastically pushes the bias spring 47, The bias spring 47 pushes the upper support plate 45 and pushes the upper and lower insulation push rods 41 and 42 together with the center pipe 48 to operate. At this time, the contact point between the movable contact and the fixed contact is consumed. In order to adjust the contact, the center pipe 48 is rotated by using the screw 44 formed at the upper end of the center pipe 48, And the lower insulating push rod 42, thereby adjusting the wipe.

In the drawings, reference numeral 11 denotes an insulating mold frame, 12 denotes an insulating frame, 13 denotes a top and a bottom busbar, 17 denotes a moving terminal, 18 denotes a flexible shunt (FLEXIBLE SHUNT ), 41 is a fixing pin, and 52 is a U-nut.

The wiping device for a circuit breaker according to the related art adjusts the interval between the latching jaw and the lower insulative push rod by using the threaded portion of the center pipe to adjust the wiping according to the contact consumption, It is an object of the present invention to provide an apparatus for adjusting a wipe of a circuit breaker which facilitates easy wipe control.

1 is a front view showing a general circuit breaker,

2 is a side view showing a general circuit breaker,

3 is a side view showing a main circuit portion of a general circuit breaker,

4 is a cross-sectional view showing a wipe-adjusting device of a breaker according to a conventional technique,

Fig. 5 is an exploded cross-sectional view showing a wipe-adjusting device of a circuit breaker according to the prior art,

6 is a cross-sectional view of a device for controlling a wipe of a circuit breaker according to the present invention,

FIG. 7 is an exploded cross-sectional view of a device for controlling a wipe of a circuit breaker according to the present invention. FIG.

Description of the Related Art [0002]

16; A vacuum discharge tube 41; Upper insulated push rod

42; A lower insulating push rod 61; Wipe adjustment nut

62; Bolt

It is an object of the present invention to provide a wipe control device for a circuit breaker having an upper insulated push rod and a lower insulated push rod for vertically moving a movable contact in a vacuum fitting tube, And a wipe adjusting nut is interposed therebetween.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for adjusting a wipe of a circuit breaker according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a side view showing a general circuit breaker, FIG. 3 is a side view showing a main circuit part of a general circuit breaker, FIG. 6 is a sectional view showing a wipe control device of a circuit breaker according to the present invention, 7 is an exploded cross-sectional view showing a wipe control device for a circuit breaker according to the present invention, respectively.

As shown in the drawing, the apparatus for controlling a wiper of a breaker according to the present invention includes an upper insulating push rod 41 for moving a movable contact in the vacuum discharge tube 16 up and down, and a wiper for a breaker having a lower insulating push rod 42 In the adjusting device, a bolt (62) is interposed between the upper insulating push rod and the lower insulating push rod, and a wipe adjusting nut (61) is provided therebetween.

The same reference numerals are given to the same parts as in the conventional configuration.

The operation of the wipe controller of the circuit breaker according to the present invention will now be described.

The lower support plate 46 elastically pushes the bias spring 47 when the lower support plate 46 is pushed by the rotary piece 51 rotatably provided at the end of the change lever 22, The bias spring 47 pushes the upper support plate 45 and pushes the upper and lower insulation push rods 41 and 42 together with the center pipe 48 to operate. The release preventing protrusions 45 'and 46' are formed on the upper and lower support plates 45 and 46 to fix the position of the spring 47. At this time, the contact wear between the movable contact and the fixed contact occurs. To this end, the wiping adjusting nut 61 between the upper insulative push rod 41 and the lower insulative push rod 42 is rotated, To adjust the wipe.

As described above, the apparatus for controlling a wipe of a circuit breaker according to the present invention is an apparatus for controlling a wipe of a circuit breaker having an upper insulating push rod and a lower insulating push rod for vertically moving a movable contact in a pipe, By providing a bolt in the push rod and the lower insulating push rod and providing a wipe adjusting nut therebetween, the wipe can be easily adjusted using only the adjusting nut.

Claims (1)

A wipe adjusting device for a circuit breaker having an upper insulated push rod and a lower insulated push rod for vertically moving movable contacts in a conduit for gas communication, comprising: a bolt interposed between the upper insulated push rod and the lower insulated push rod, Wherein a wipe adjusting nut is provided on the wiper.