JPS61250918A - Electric operator for switch apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to an electric operating device for switching equipment such as a disconnector with a grounding device used as one of power plants or substation equipment. be.

(Prior Art) Conventionally, for example, a disconnector and a grounding device have been configured independently, and the disconnector performs the on/off operation of the electric circuit and the on/off operation of the grounding device, respectively. Further, these on/off operations were all performed using an operating device that was switched between three positions: on and off.

(Problem to be solved by the invention) However, the conventional disconnector with a grounding device requires the use of two sets of operating devices, one for the electric circuit and one for the grounding, which not only complicates the structure but also makes it difficult to operate. There was a problem that.

An object of the present invention is to provide an electric operating device for a switching device that can simplify the configuration of an on/off operation device for multiple positions of the switching device, and can perform switching operations easily and reliably. It is in.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a fixed contact and a movable contact that can move toward and away from the fixed contact in a storage case. In switching equipment such as a switch, a disconnector, a grounding device, or a disconnector with a grounding device, the movable contact body can be moved to three positions, such as electrical circuit on/off and grounding on/off, through an appropriate interlocking mechanism. A motor that alternately switches between the multiple positions, an operating switch for switching between the multiple positions, and one of the operating switches turned ON.
The motor control circuit is configured to start the motor when the motor is activated, and to stop the motor after a predetermined period of time has elapsed.

(Function) By adopting the above-mentioned means, the present invention functions as follows.

The operation switch for switching from the off position to the on position is turned on.
Then, the motor is rotated by the motor control circuit for a predetermined period of time, during which the movable contact body is switched from the off position to the on position. Further, when the operation switch for switching from the on position to the off position is turned on, the motor is rotated for a predetermined period of time by the motor control circuit, and during this period, the movable contact body is switched from the on position to the off position. Similarly, switching from the off position to the ground contact position and from the ground contact position to the off position is performed.

As described above, according to the present invention, the on/off position switching operation of the opening/closing device is easily and automatically performed, and the structure of the operating device itself is simplified.

(Example) - Hereinafter, an example in which the present invention is embodied in a disconnector with a grounding device will be described based on FIGS. 1 to 7.

As shown in Fig. 1, disconnectors 2 to 2 each having a grounding device are fixed upright on the upper surfaces of three frames 1 to 1 that are vertically fixed on the foundation, and the electrical circuits for three phases and the grounding are turned on and off. The operations are performed all at once. These three-phase disconnectors 2 to 2 are each configured in substantially the same way, and have a common manual operation mechanism and electric operation device 24, as will be described later.
The three phases are turned on and off at the same time.

Therefore, the configuration of the new circuit switch 2 in this embodiment will be explained according to FIG. 2.A case 3 of the disconnector 2 is placed on a pedestal 1, and an operating shaft 4 is rotatably supported inside the case 3. Rir. The base end of a switching lever 5 is fixed to the operating shaft 4, and as the operating shaft 4 rotates, the switching lever 5 is moved to three positions (man, off, and ground) at predetermined intervals as shown by solid lines and chain lines in FIG. C
,O.

It is arranged so that it can be switched to E.

A lower insulating tube 6 as an insulating support is mounted on the upper surface of the case 3.
is erected and fixed via a mounting flange 7, and a lower terminal plate 8 is attached to its upper end surface via a mounting flange 9. An upper insulator tube 10 serving as an insulating support is erected and fixed on the upper surface of the lower terminal plate 8 via a mounting flange 11.
An upper terminal plate 12 is attached to its upper end surface via a mounting flange 13.

A ring-shaped lower contact 14 is erected and fixed on the upper surface of the lower terminal plate 8 at the center of the upper insulator tube 10, and the upper terminal plate 12 is arranged so as to face the lower contact 14 at a predetermined distance. A ring-shaped upper contact 15 is suspended and fixed to the lower surface via a conduit 16. Further, a ground contact 17 is erected and fixed on the upper surface of the case 3 via a ground pipe 18 so as to face the lower contact 14 at a predetermined distance from the center of the lower insulator pipe 6.

An insulating rod 19 is inserted into the ground pipe 18 so as to be movable up and down, and the tip of the switching lever 5 is connected to the pin 2 at the lower end.
0 through a long hole 21. A cylindrical movable contact member 22 is fixed to the upper end of the insulating rod 19 by a pin 23, and is always fitted into the lower contact member 14 and maintained in a contact state.

As the switching lever 5 rotates, the movable contact body 22 is moved up and down via the insulating rod 19 to come into contact with the upper contact 15 or the ground contact 17.

Therefore, when the switching lever 5 is switched to the on position C shown by the chain line in FIG. When the switching lever 5 is rotated to the off position O shown by the solid line in the figure, the movable contact body 22 separates from the upper contact 15 and the ground contact 17 and becomes an open circuit state.

Further, when the switching lever 5 is rotated to the grounding position E shown by the chain line in the same figure, the movable contact body 22 pinches into contact with the grounding contact 17 at its lower end and enters the grounded state.

An operation box 26 having a cover plate 25 is fixed on one side of the pedestal 1, and a drive shaft 2 is mounted on the upper side of the box 26.
7 is rotatably supported in the vertical direction and in a fixed position. On the other hand, the operating shafts 4 to 4 of each of the disconnectors 2 to 2 are connected by connecting irons 28 and 28, respectively, and a driven bevel gear 29 is fixed to the outer end of the left operating shaft 4, and this gear 29 is connected to the drive shaft 28. It is rotated by a drive bevel gear 31 which is rotated by the shaft 27 via an intermediate shaft 30.

The drive shafts 27 are each independently operated by a manual operating mechanism or an electric operating device 24.

Therefore, first, the manual operation mechanism will be explained according to FIGS. 32a
is formed with a notch. This engagement surface 32a has a U-shaped engagement fitting 3 fixed to the tip of the manual operation handle 33.
4, and when the operating handle 33 is rotated between the three positions C, O, and H in FIG. Manual switching operation is possible. Moreover, the operation box 26
A support shaft 36 fixed to the lower surface of an L-shaped positioning fitting 35 for setting the cut position O of the manual operation handle 33 is removably attached to the engagement hole 26a formed through the upper side wall. Moreover, it is inserted so as to be horizontally rotatable. This positioning metal fitting 35 rotates 180 degrees and changes direction when the manual operation handle 33 is rotated from the on position C to the off position O and when the manual operation handle 33 is rotated from the grounding position E to the off position 0. It will be done.

Further, a locking plate 37 having three recesses 37a to 37c for locking the coaxial shaft 27 in three positions, ie, on/off or grounding, is fixed to the drive shaft 27 so as to be located inside the operation box 26. A pair of stoppers 38° 39 fixed to the lower surface of the lock plate 37 and a stopper 40° 41 fixed to the box 26 side allow the manual operation handle 3 to be
3, the entry position C or the ground contact position E can be set.

A bracket 42 is fixed to the operation box 26 in correspondence with the lock plate 37, and an electromagnetic solenoid S
A lock lever 44 rotated by QL is supported by a shaft 45 so as to be rotatable in the vertical direction. Same lock lever
44 is always held in the recesses 37a to 3 by a spring 46.
7c is biased in the locking direction to engage with one. These lock plate 37, bracket 42, electromagnetic solenoid SQL, loft lever 44, and spring 46
etc. constitute a position locking mechanism in the electric operating device described below, and in this embodiment, the lock plate 37
The input position C and the grounding position E of the manual operation mechanism are set by the stoppers 38 and 39.

A bracket 47 is fixed to the upper surface of the operation box 26, and a shielding member 49 is supported by a support shaft 48 on the bracket 47 so as to be rotatable in the vertical direction so as to cover the engagement pin 32. The manual operation handle 33 becomes unusable in the state where it is shielded. On the contrary, the handle 3 in which the shielding member 49 is spaced apart from the engagement bin 32
In the usable state of No. 3, a manual safety switch SAD (see FIG. 7) of the electric operating device 24, which will be described later, is turned off to prevent the electric operating device 24 from operating.

Next, the electric operating device built into the operation box 26 will be explained with a focus on the circuit shown in FIG.

First, to briefly explain the outline of this circuit, a motor M for rotating the drive shaft 27 in forward and reverse directions is connected to the 0th circuit, and a field winding R that creates the magnetic field of the motor M is connected to the 0th circuit. are connected in parallel. Note that a molded circuit breaker MCB and a thermal relay THR are connected in series to the 0th circuit.

The 0th circuit is connected to an operation switch C32 provided on a power distribution board (path shown in the figure) of a power plant or substation in order to perform a switching operation from the off position 0 to the ground position E. Similarly, operation switches C34, C3I, and C33 for switching from grounding position E to off position 0, from off position 0 to on position C1, and from on position C to off position O are connected to the 0th to 0th circuits, respectively. ing.

Further, a knife switch KS and a relay 62X1 for turning on and off the field winding R are connected to the 0th circuit.

The 0th to 0th circuits each include operation switches C32, C34,
Magnetic contactors 88B and 880.88C188T for starting the motor M are connected in series with C3I and C33. In addition, each position 0. Limit switches LSa to LSc for stopping the motor M when switched to C or H are connected, and four pushbutton switches PBS to PBS provided in the operation box 26 for position switching operation are connected respectively. It is connected.

The limit switch LSa is turned off when it is on, LSb is turned off when it is off, and LSc is turned off when it is grounded.

Furthermore, the 0th to 0th circuits include auxiliary relays 6c, 6E,
The electromagnetic solenoid SOL, relay 62.62X2, and auxiliary switches AUSI~4 that turn on at each position are connected, and the electromagnetic contactors 88E, 880.88C, 88T
Together, they constitute a control circuit for the motor M.

Next, the operation of the electric operating device 24 configured as described above will be explained.

Now, motor M is stopped and electromagnetic solenoid SQL
is demagnetized and the lock lever is inserted into the recess 37a of the lock plate 37.
44 is engaged and the disconnector 2 is held at the OFF position O, when the operation switch C3I is turned on to switch it to the ON position C, the auxiliary relay 6C is energized and its normally open contact is turned on. 6C-a is turned on. Then, since the auxiliary switch AUSI is turned on, the relay 62 is energized, its normally open contact 62-a is turned on, and the relay 62X is turned on.
1 and 62X2 are excited. Then, the normally open contact 6
2X1-a is closed, the electromagnetic solenoid SQL is energized, the lock lever 44 is disengaged from the recess 37a of the lock plate 37, and at the same time the lock at the cut position is released, the field winding R is energized. Also, 62X2 normally closed contact 62X2
-b is opened, opening the short circuit of the motor. When the normally open contact 5QL-a of the solenoid SQL is turned on, the limit switch LSa is turned on, so the electromagnetic contactor 88C is energized and its normally open contact 88C-a is closed, and as a result, the motor M is turned on. Normal rotation is started, and the drive shaft 27 is rotated from the cut position 0 toward the cut position C. In addition, the normally closed contact 88C-b is opened by the excitation of the electromagnetic contactor 88C, and the operation switch for switching from the on position C to the off position O, from the off position O to the ground position E, and from the ground position E to the off position O. Even if C33, C32, and C34 are turned on, they do not operate.

When the drive shaft 27 rotates to the on position C and the limit switch LSa is turned off, the electromagnetic contactor 88C is demagnetized and the motor M is stopped.

Further, when switching the drive shaft 27 from the off position O to the grounding position E, when the operation switch C32 is turned on, the operation is performed in the same manner as the switching operation from the off position 0 to the on position C described above. Note that at this time, the motor M is reversely rotated.

Also, when switching the drive shaft 27 from the ON position C to the OFF position 0, and when switching from the grounding position E to the OFF position O, the same conditions as described above for switching from the OFF position O to the ON position C are applied. It is carried out in the same way as the action.

Note that the present invention can also be embodied as follows.

In the above embodiment, a disconnector with a grounding device that performs three-position switching operations at once is used. Embodiment as an electric operating device that switches the contact body between three or more positions.

Effects of the Invention As detailed above, the present invention can simplify the structure of an electric switching device for multiple positions of a switching device, and can automatically and easily perform position switching operations. effective.

[Brief explanation of drawings]

Fig. 1 is an overall front view showing an embodiment of the present invention as a disconnector with a grounding device, Fig. 2 is a vertical cross-sectional view of the central part of the disconnector, and Fig. 3 is an enlarged partially broken front view of the operating device. 4 is a plan view of FIG. 3, FIG. 5 is a partially enlarged perspective view of the manual operating handle, FIG. 6 is a plan view of the locking mechanism, and FIG. 7 is a circuit diagram showing the electric operating device. 2... Disconnector, 4... Operating shaft, 5... Switching lever, 24... Electric operating device, 26... Operating box,
27... Drive shaft, M... Motor, C... In position,
0...off position, E...grounding position, C3I~C34・
・・Operation switch, 62.62X1, 62X2・・Relay, SQL・Electromagnetic solenoid, LSaNLSc・
・・Limit switch, 88C, 880, 88E, 88
T-...Magnetic contactor.

Claims (1)

[Scope of Claims] 1. A switch, a disconnector, a grounding device, or a disconnector with a grounding device, etc., in which a fixed contact and a movable contact that can connect and separate from the fixed contact are provided in a storage case. In the switching equipment, the movable contact body is connected to the electrical circuit through an appropriate interlocking mechanism
a motor that alternately switches between three or more multiple positions such as off and grounding on/off; an operating switch for switching between the multiple positions; and an operating switch that operates when any one of the operating switches is turned on. and a motor control circuit configured to start the motor when the motor is activated and to stop the motor after a predetermined period of time has elapsed. 2. The switchgear is a disconnector with a grounding device, and the upper, middle, and lower parts of the insulating support set up on the pedestal are provided with an upper contact on the electrical circuit side, a lower contact on the ground side, and a lower contact on the electrical circuit side. A grounding contact is disposed respectively, and a movable contact body common to the electric circuit side and the grounding side, which is always electrically connected to the lower contact, is movable in the vertical direction in the middle part of the insulating support. The movable contact body is further provided with the movable contact body in three positions: an on position where it is in contact with the upper contact, an off position where it is spaced apart from the upper contact, and a ground position where it is in contact with a ground contact. The patent includes an operation switch configured to be able to be switched alternately and for switching the movable contact body from the off position to the on position, from the off position to the ground position, from the on position to the off position, and from the ground position to the off position. An electric operating device for a switching device according to claim 1. 3. The motor control circuit includes a relay that is excited to operate an electromagnetic contactor for starting the motor when any one of the operation switches is turned on, and a drive shaft rotated by the motor. The electric operating device for a switching device according to claim 1, further comprising a limit switch that turns off the electromagnetic contactor when the electromagnetic contactor is rotated by a predetermined angle.