JPH0643985U - Disconnector operating device for gas insulated switchgear - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a disconnector operating device that does not require the use of limit switches. [Structure] The ball nut 54 is combined with the link 12, and the link is used to open and close the auxiliary switch 11 for detecting the completion of the open position and the completion of the closed position of the disconnector.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switch operating device for a gas insulated switchgear.

[0002]

[Prior art]

 Conventionally, in this type of disconnector operating device, as shown in FIG. 5, the speed of the main shaft of the electric motor 51 is reduced by a reduction mechanism 52, and the rotational movement of the output shaft of the reduction mechanism 52 is controlled by a ball screw 53, a ball nut. At 54, it is converted into a linear motion. Then, the main shaft (not shown) of the disconnector is driven by rotationally driving the lever 56 by the cam 55 provided on the ball nut 54. Detection of completion of the disconnecting position and completion of the disconnecting position of the disconnecting switch is detected by combining the limit switches LS1 and LS2 with the lever 56.

FIG. 6 shows a disconnector drive control circuit, and FIG. 7 shows a time chart of the operation of the limit switches LS1 and LS2. In FIG. 6, 89C1 is an electromagnetic contactor for closing a circuit, 89c1 and 89c2 are its contacts, 89D is an electromagnetic contactor for an open circuit, and 89d1 and 89d2 are its contacts.

To explain the operation, in FIG. 5, the disconnecting switch is in an open state, the limit switch LS1 is off, and the limit switch LS2 is on. When the disconnecting switch operating device is started from this state, the electric motor 51 is started and the ball nut 54 starts moving to the right in FIG. 5, and at time t1 in FIG. 7, the limit switch LS2 is turned off and the disconnecting switch is closed. Begins. When the ball nut 54 further moves and the limit switch LS1 is turned on at time t2, completion of the disconnecting position of the disconnector is detected.

[0005]

[Problems to be solved by the device]

 By the way, the above disconnector operating device has the following problems.

That is, since the timing for controlling the electric motor 51 is set by the lever 56 for driving the main shaft of the disconnector, it is necessary to make a fine adjustment according to the stroke of the ball nut 54 when assembling the disconnector operating device. I was there.

There is a possibility that the on / off timings of the limit switches LS1 and LS2 directly affect the drive of the main shaft of the disconnector, and the displacement of the limit switch installation position shortens or lengthens the stroke.

Although it is ideal that the ball nut 54 be stopped when the lever 56 is completely moved, in the conventional type, there is a possibility that the ball nut 54 may be overwhelmed too quickly depending on the timing of switching the limit switch.

The above problems are caused by the use of the limit switch. Therefore, an object of the present invention is to provide a disconnector operating device which does not require the use of the limit switch.

[0010]

[Means for Solving the Problems]

 The present invention relates to a disconnector operating device of a gas insulated switchgear in which a ball screw nut driven by an electric motor drives a main shaft of a disconnector via a lever, and a power transmission member is combined with the ball nut and nut. It is characterized in that the transmission member is used to drive the opening / closing of the auxiliary switch for detecting the completion of the open position and the completion of the closed position of the disconnector.

[0011]

[Action]

 In the present invention, since the auxiliary switch is provided in place of the limit switch, the auxiliary switch is opened / closed by a power transmission member such as a link attached to a ball screw / nut driven by an electric motor. This eliminates the need for limit switches that require delicate adjustments.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, the same parts as those in FIG. 5 are designated by the same reference numerals and the description thereof will be omitted. The disconnector operating device according to the present invention is provided with an auxiliary switch 11 in place of the limit switch shown in FIG. 5, and this auxiliary switch 11 is connected to a ball nut 54 by a link 12 as a power transmission member. The opening / closing operation is performed. The auxiliary switch 11 has contacts 89-1a and 89-2b for detecting the completion of the closed position of the disconnector and contacts 89-1b and 89-2a for detecting the completion of the opening position.

FIG. 2 is a diagram showing the relationship between the stroke associated with opening and closing of the disconnector and the stroke of the ball nut 54. The ball nut 54 has its entire stroke in order to drive the lever that drives the main shaft of the disconnector. The central area is used, and free-moving sections L1 and L2 are provided on both sides.

FIGS. 3 and 4 are time charts showing the operation timings of the disconnector drive control circuit and the respective contacts, and the same parts as those in FIG. 6 are denoted by the same reference numerals. The electric motor 51 is activated and the ball nut 54 starts moving. At time t1, the contact 89-1b opens and the contact 89-2a closes. At time t2 when the ball nut 54 further moves, the contact 89-1a is closed and the contact 89-2b is opened to detect the completion of the closed circuit position.

[0015]

[Effect of device]

 As described above, according to the present invention, since the auxiliary switch is used instead of the limit switch, fine adjustment is not necessary and the number of parts can be reduced. The shift of the contact switching timing in the auxiliary switch can be included in the stroke of the ball screw.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a disconnector operating device according to the present invention.

FIG. 2 is a diagram showing the relationship between the stroke of the ball screw and the opening / closing operation of the disconnector in FIG.

FIG. 3 is a diagram showing a disconnector drive control circuit according to the present invention.

FIG. 4 is a diagram showing the operation timing of each contact of the auxiliary switch according to the present invention.

FIG. 5 is a configuration diagram of an example of a conventional disconnector operating device.

FIG. 6 is a diagram showing a conventional disconnector drive control circuit.

7 is a diagram showing the timing of the operation of the limit switch shown in FIG.

[Explanation of symbols]

 11 ... Auxiliary switch 12 ... Link 51 ... Electric motor 52 ... Reduction mechanism 53 ... Ball screw 54 ... Ball nut 55 ... Cam 56 ... Lever LS1, LS2 ... Limit switch 89C ... Closing magnetic contactor 89D ... Opening magnetic contactor

Claims (1)

[Scope of utility model registration request] 1. A disconnector operating device for a gas-insulated switchgear in which a main shaft of a disconnector is driven by a ball screw / nut driven by an electric motor via a lever,
A disconnection of a gas-insulated switchgear, characterized in that a nut is combined with a power transmission member, and the power transmission member is used to drive the opening and closing of an auxiliary switch for detecting the completion of the opening position and the closing position of the disconnecting switch Device operating device.