JP2016157758A - Motor operation mechanism of tap changer in loading state - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor operation mechanism of a tap changer in a loading state capable of facilitating replacement of electric parts constituting a control part and improving maintainability.SOLUTION: The motor operation mechanism of a tap changer includes: a mechanism part 13 which drives a tap changer in a loading state; and a control part 16 which controls the mechanism part 13 by being electrically connected to the mechanism part 13. Various electric parts constituting the control part 16 are intensively configured on a panel 14, detachable from the control part 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electric operation mechanism for an on-load tap changer that facilitates replacement of electrical components constituting a control unit and improves maintainability.

  2. Description of the Related Art Conventionally, a load tap changer that switches a tap of a transformer winding without cutting off the load of the transformer, constantly adjusts the transformation ratio, and keeps the supply voltage constant is known (see Patent Document 1 below). ).

JP-A-7-201608

  As shown in FIG. 7, the on-load tap changer is schematically composed of a change-over switch 102 mounted in the transformer 101 for the purpose of interrupting load current and a tap selector 103 located below the switch. It is arranged on the side surface of the transformer 101 via a horizontal drive shaft 104 arranged on the upper part of the transformer and a vertical drive shaft 106 connected via the horizontal drive shaft 104 and the gear box 105. Connected to the electric operation mechanism 107.

  The electric operation mechanism 107 includes an electromagnetic switch 108 that operates the mechanism 107, a tap instruction device 109 that is driven along with the operation of the mechanism 107, a storage unit and a display unit (not shown) that store the number of tap switching, and the number of switching times. Is configured to include a monitoring device 110 including a determination unit that determines when the specified number of times is reached and displays the contents.

  When the tap of the transformer winding is switched by the on-load tap changer 111, the electric operation mechanism 107 disposed on the side surface of the transformer 101 is driven, and the horizontal drive shaft 106 is connected to the horizontal via the gear box 105. This is realized by transmitting power to the drive shaft 104 and driving the on-load tap changer 111.

  As described above, the electric operation mechanism 107 of the on-load tap changer 111 includes various electrical components including the electromagnetic switch 108 in order to control the tap change operation of the transformer winding. These electrical components need to be replaced regularly, and it is desirable to reduce the time for replacement work and simplify the work.

  Therefore, the present invention provides an electric operation mechanism for an on-load tap changer capable of shortening the replacement time of various electrical components and reducing the burden of replacement work.

  The invention according to claim 1 is a mechanism for driving the on-load tap changer in the electric operation mechanism of the on-load tap changer that switches the taps of the transformer windings when the transformer is excited or loaded. And a control unit that is electrically connected to the mechanism unit and controls the mechanism unit, and the various electrical components constituting the control unit are integrated on a panel that can be detached from the control unit. It is characterized by.

  According to a second aspect of the present invention, in the electric operation mechanism of the on-load tap changer according to the first aspect, the panel and the control unit are electrically connected by a wiring connector.

  The invention according to claim 3 is an electric operation mechanism of a load tap changer that switches a tap of a transformer winding in an excited state or a load applied state, and a mechanism unit that drives the load tap changer. And a control unit that is electrically connected to the mechanism unit and controls the mechanism unit, and the control unit is configured to be detachable from the mechanism unit.

  According to a fourth aspect of the present invention, in the electric operation mechanism of the on-load tap changer according to the third aspect, the control unit and the mechanism unit are electrically connected by a wiring connector.

  According to the first aspect of the present invention, the various electrical components that need periodic replacement are collected on the panel, and the panel is detachable from the control unit. It is only necessary to remove each panel, simplifying the periodic replacement of electrical components, shortening the work time and reducing the work load.

  According to the second aspect of the present invention, since the panel in which the electrical components are aggregated and the control unit are connected by the wiring connector, the operation for removing the panel from the control unit at the time of replacement of the electrical component is performed only by removing the wiring connector. Well, the regular replacement work of electrical components can be further simplified.

  According to invention of Claim 3, every control part electrically connected with a mechanism part can be replaced, and the exchange operation | work of various components which comprise control parts other than the electrical equipment on a panel is performed efficiently. Can do.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the work for removing the control unit from the mechanism part is only to remove the wiring connector, and the periodic replacement work for all the parts constituting the control part. Can be dramatically simplified.

It is a figure which shows the state which attached the electric operation mechanism which concerns on 1st Example of this invention to the transformer. It is a figure which shows the electric operating mechanism which concerns on 1st Example of this invention. It is a figure which shows the wiring connector which connects between a panel and a control part in this invention, or between a mechanism part and a control part. It is a figure which shows the state which attached the electric operating mechanism which concerns on 2nd Example of this invention to the transformer. It is a figure which shows the mechanism part of the electrically-driven operation mechanism which concerns on 2nd Example of this invention. It is a figure which shows the control part of the electrically-driven operation mechanism which concerns on 2nd Example of this invention. It is a figure which shows the state which attached the electric operation mechanism of the conventional load tap changer to the transformer.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 shows a state in which an electric operation mechanism 2 of a load tap changer 1 according to a first embodiment of the present invention is attached to a transformer 3.

  In the first embodiment, the on-load tap changer 1 attached to the transformer 3 is driven by the electric operation mechanism 2 attached to the side surface of the transformer 3. Specifically, the power of the electric operation mechanism 2 is transmitted from the vertical drive shaft 4 through the gear box 5 through the horizontal drive shaft 6 and further through the gear box 7 to drive the on-load tap changer 1. .

  As shown in FIG. 2, the electric operation mechanism 2 includes an electric motor 8 as a drive source for driving the vertical drive shaft 4, a gear box 9 connecting the electric motor 8 and the vertical drive shaft 4, and driving of the electric motor 8. A mechanism comprising a pilot switch 10 that detects a tap switching operation by the on-load tap changer 1, a limit switch 11 that detects the upper and lower limits of the tap, and a tap display unit 12. For example, the control unit 16 includes a heater 14 provided outside the panel 14 and a panel 14 in which various electrical components such as operation switches and electromagnetic contactors are gathered.

  Then, the operator operates the operation switch on the panel 14 to drive the electric motor 8 of the mechanism unit 13, and from the vertical drive shaft 4 to the gear box 5, the horizontal drive shaft 6, and the gear via the gear box 9. The on-load tap changer 1 is driven via the box 7 to change the tap of the transformer winding.

  In the electric operating mechanism 2 according to the first embodiment of the present invention, the controller 16 and the panel 14 are connected by the wiring connectors 17a and 17b shown in FIG. Since the wiring connector 17a on the control unit 16 side and the wiring connector 17b on the panel 14 side are configured to be detachable, when replacing various electrical components on the panel 14, the wiring connector 17a on the control unit 16 side is changed to the panel. It is only necessary to remove the 14-side wiring connector 17b, so that the work load is reduced and the work time can be shortened.

  FIG. 4 is a view showing an electric operation mechanism of the on-load tap changer according to the second embodiment of the present invention. In FIG. 4, the same components as those shown in FIG. In FIG. 4, the on-load tap changer 1 attached to the transformer 3 is constituted by an electric operation mechanism 21 including a mechanism part 18 attached to the upper part of the transformer 3 and a control part 20 connected thereto with a wiring cable 19. Driven.

  As shown in FIG. 5, the mechanical unit 18 includes an electric motor 22 as a drive source for driving the on-load tap changer 1, a gear box 23 for transmitting the power of the electric motor 22 to the on-load tap changer 1, and an on-load tap changer. The position detecting device 24 is configured to detect the tap switching position of the transformer winding from the operation state of the transformer 1.

  In FIG. 5, reference numeral 25 denotes a handle connecting portion for connecting a handle 26 for manually operating the on-load tap changer 1, 27 is a tap display portion, and 28 is a case where the on-load tap changer 1 is driven by the handle 26. And a clutch for releasing the mechanical connection between the gear box 23 and the electric motor 22.

  As shown in FIG. 6, the control unit 20 includes a counter 29, a tap display unit 30, a thermostat 31, a heater 32, and a panel 33 that collects various electrical components such as operation switches and electromagnetic contactors. .

  Then, when the operator operates the operation switch on the panel 33, the motor 22 shown in FIG. 5 of the mechanism unit 18 electrically connected to the control unit 20 and the wiring cable 19 is driven as shown in FIG. To do.

  The drive of the electric motor 22 is transmitted to and driven by the load tap changer 1 shown in FIG. 4 via the gear box 23, and the tap change of the transformer winding is performed by the load tap changer 1.

  The tap switching position of the transformer winding is detected by the position detection device 24 in the mechanism unit 18, and the detection result is output to the control unit 20 via the wiring cable 19 shown in FIG. Receiving this, the control unit 20 grasps the tap switching state and controls the electric motor 22 and the like in the mechanism unit 18.

  Further, in the electric operating mechanism 21 according to the second embodiment of the present invention, the control unit 20 and the panel 33 are connected by the wiring connectors 17a and 17b shown in FIG. That is, since the wiring connector 17a on the control unit 20 side and the wiring connector 17b on the panel 33 side are configured to be detachable, when replacing electrical components on the panel 33, the wiring connector 17a on the control unit 20 side By removing the wiring connector 17b on the panel 33 side, the replacement work can be easily performed.

  3 is connected to the mechanism unit 18 side shown in FIG. 4, the wiring connector 17b is connected to the control unit 20 side, and the control unit 20 is removed from the mechanism unit 18, thereby the control unit 20 as a whole. It is also possible to perform maintenance of the control unit 20 by replacing it.

  2, 5, and 6 show an example of the configuration of the mechanism unit and the control unit, and the configuration of the mechanism unit and the control unit may be changed without departing from the spirit of the present invention. Of course, it is included in the technical scope of the present invention. Further, the attachment positions of the mechanism parts 13 and 18 and the control parts 16 and 20 are not limited to the arrangement shown in FIGS.

  As described above, the electric operation mechanism of the on-load tap changer according to the present invention aggregates various electrical components constituting the control unit on the panel, and connects the panel to the control device by the wiring connector. The control unit can be detachably configured, or the mechanism unit and the control unit that constitute the electric operation mechanism are separately arranged, and the mechanism unit and the control unit are connected by a wiring connector so that the control unit can be detached. It is possible to simplify the exchange work of various electrical components that constitute the unit, shorten the work time, and reduce the work load.

  The present invention can be used for various electrical devices including various electrical components that require periodic replacement.

DESCRIPTION OF SYMBOLS 1 Load tap changer 2,21 Electric operation mechanism 3 Transformer 4 Vertical drive shaft 5, 7, 9, 23 Gear box 6 Horizontal drive shaft 8, 22 Electric motor 10 Pilot switch 11 Limit switch 12, 27, 30 Tap Display unit 13, 18 Mechanism unit 14, 33 Panel 15, 32 Heater 16, 20 Control unit 17 a, 17 b Wiring connector 19 Wiring cable 24 Position detection device 25 Handle connection unit 26 Handle 28 Clutch 29 Counter 31 Thermostat

Claims (4)

  In a load tap changer that switches a tap of a transformer winding in a state where a transformer is excited or a load is applied, a mechanism unit that drives the load tap changer and is electrically connected to the mechanism unit The electric operation mechanism of the on-load tap changer comprising the control unit for controlling the mechanism unit, wherein various electrical components constituting the control unit are integrated on a panel detachable from the control unit. .   The electric operation mechanism of the on-load tap changer according to claim 1, wherein the panel and the control unit are electrically connected by a wiring connector.   In a load tap changer that switches a tap of a transformer winding in a state where a transformer is excited or a load is applied, a mechanism unit that drives the load tap changer and is electrically connected to the mechanism unit An electric operation mechanism for a load tap changer comprising a control unit for controlling the mechanism unit, wherein the control unit is configured to be detachable from the mechanism unit.   The electric operation mechanism of the on-load tap changer according to claim 3, wherein the control unit and the mechanism unit are electrically connected by a wiring connector.

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