JPH07130558A - No-voltage tap changer - Google Patents

Abstract

PURPOSE:To obtain a no-voltage tap changer with which tap position can be detected electrically, and tap changing can be conducted by remote control. CONSTITUTION:Terminal bases 10a to 10c, having the terminals 13 connected to a transformer coil, are securedly supported by a supporting part 8, terminals 13 are switchably connected by the contacts attached to a control shaft 1, terminal bases 9a to 9c, having the terminals 12, are fixed and supported by a supporting part 8, and the terminals 12 are switchably connected by contacts 20 attached to the control shaft 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltageless tap changer capable of electrically detecting a tap position.

[0002]

2. Description of the Related Art FIGS. 7 (a) to 7 (c) are a longitudinal sectional front view, a left side view and a front view of an indicator of a conventional voltageless tap changer, in which 1 is an operating axis and 2 is a front view. It is a handle attached to the operation shaft 1 and has an indicator display hole 2a. Reference numeral 3 is an indicator attached to the operation shaft 1 inside the handle 2, and tap numbers 1 to 5 are displayed. In the above configuration, when the handle 2 is rotated to switch the taps, the current tap position is displayed in the display hole 2a as the tap number.

[0003]

As described above, in the conventional voltageless tap changer, the display hole 2 of the handle 2 is used.
Although the tap position was detected by the tap number seen from a, the tap position could not be electrically detected, and the remote monitoring of tap switching could not be performed.

The present invention was made in order to solve the above problems, and it is possible to electrically detect the tap position and to perform remote monitoring of tap switching. Aim to get.

[0005]

A voltageless tap changer according to the present invention has a first terminal mounted on an operation shaft between a plurality of first terminals provided on a fixedly supported first terminal block. A plurality of second terminals provided on the second terminal block are switchably connected by contacts, and a plurality of second terminals provided on the operation shaft are switchably connected between the plurality of second terminals.

[0006]

In the present invention, the plurality of first terminals provided on the first terminal block are switchably connected by the first contact mounted on the operating shaft, and are provided on the second terminal block. The plurality of second terminals are switchably connected by a second contact attached to the operating shaft, and a signal corresponding to the connection position between the first terminals is generated between the second terminals.

[0007]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. Figure 1
(A), (b) shows the side view and front view of the operating part of the voltageless tap changer by Example 1, and the operating shaft 1 is the tank 4
A handle 5 is inserted into the inside of the operation shaft 1 and is attached to the outer end of the operation shaft 1. 6 is a transformer iron core, 7 is a clamp of the iron core 6, and 8 is a support part attached to the clamp 7. The support part 8 has terminal blocks 9a to 9c of the indicator light switching part and terminals of the tap switching part. Stand 1
0a to 10c (corresponding to U phase, V phase, W phase) are supported,
The operation shaft 1 is inserted through the terminal blocks 9a to 9c, 10a to 10c, and the operation shaft 1 is provided with the terminal blocks 9a to 9c, 10a to 10c.
The contacts 11 and 20 are attached at c. or,
The terminal blocks 9a to 9c are provided with a plurality of terminals 12, the terminal blocks 10a to 10c are provided with a plurality of terminals 13, the terminal 12 is connected to the indicator light lead 14, and the terminal 13 is connected via the tap lead 15. Connected to the transformer coil.

2A and 2B show the connection position of the terminal 13 in the transformer coil 16 and the actual transformer coil 16.
No. is shown on the terminal 13. 1-No. Number four. Further, 1 to 3 are tap numbers, and No. 2 and N
o. When the terminal 13 of 3 is connected, tap number 1, N
o. 2 and No. When the terminal 13 of No. 4 is connected, tap number 2, No. 1 and No. When the terminal 13 of 4 is connected, the tap number is 3.

FIGS. 3A to 3C show connection states of the terminal blocks 9a to 9c and 10a to 10c at the time of each connection of tap numbers 1 to 3. First, when the tap number 1 shown in FIG. 3A is connected, that is, when the handle 5 is operated, each contact 11 is rotated through the operation shaft 1, and the N of each phase of U, V, and W is rotated.
o. 2 and No. When the terminal 3 of No. 3 is connected, A1 and B1 of the terminals 12 are connected in the terminal block 9a, and the indicator lamp 17a connected via the indicator lamp lead 14 during this period is turned on. In the terminal blocks 9b and 9c, A of the terminals 12
The contacts 20 are not connected between 2, 2 and between A3 and B3, and the indicator lamps 17b, 17c connected to them via the indicator lamp lead 14 are not lit.

Next, at the time of connection of tap number 2 shown in FIG. 2 and No. When the terminal 13 of No. 4 is connected by the contact 11, A2 and B2 of the terminals 12 are connected by the contact 20 in the terminal block 9b, and the indicator lamp 17b is turned on. On the other hand, the terminal block 9a,
9c, terminals A1, B1 and A3, B3 of the terminal 12 are not connected by the contact 20, and the indicator lamps 17a, 1
7c does not light up. Also, tap number 3 shown in FIG.
Connection, that is, No. 1 and No. When the terminal 13 of No. 4 is connected by the contact 11, the A3 and B3 of the terminals 12 of the terminal block 9c are connected by the contact 20, and the indicator lamp 17c is turned on. On the other hand, terminal block 9
a and 9b, between terminals A1 and B1 of terminal 12 and A2 and B
The two are not connected by the contact 20, and the indicator lamp 17
a and 17b do not light up.

FIG. 4 shows A1 to A3 and B of each terminal 12.
1 to B3 and an actual connection diagram of the indicator lights 17a to 17c are shown, and the terminals A1 to A3 and B1 to B3 are the indicator light leads 14
Connected to the collective terminal 18 via the
~ 17c and the power supply 19 are connected.

In the first embodiment, a contact 20 for display switching is attached to the operation shaft 1 for tap switching, and display switching is performed at the same time as tap switching. When the tap numbers 1 to 3 are connected, the indicator lights 17a to 17c, respectively. Is lit.
Therefore, the tap position is electrically detected, and it becomes possible to remotely monitor the tap switching. Further, since the terminal blocks 9a to 9c and the like are provided in the transformer tank 4, it is possible to make them into a solid shape without affecting the outer shape. Further, the mechanism is simple, and it is only necessary to incorporate new parts into the conventional non-voltage tap changer, and the quality, work efficiency, durability and maintainability are very good, and the cost does not increase. For high voltage (terminal 13
Since it can be used as a switch of a non-voltage tap with an inter-voltage of 24 kV and 100 A), it can be sufficiently used as a control power supply. Further, since it is directly used for the non-voltage tap changer, it can be applied to all models using the non-voltage tap changer, and not only the indicator lamps 17a to 17c but also any type of tap position that is desired to be operated. The output can be used for circuits and equipment.

Second Embodiment FIGS. 5A to 5G show tap numbers 1 to 7 according to the second embodiment.
The connection state in each terminal block 9a-9c, 10a-10c at the time of each connection of is shown. The basic configuration is the same as in FIG.
First, when the tap number 1 shown in FIG. 5A is connected, that is, when the handle 5 is operated, each contact 1 is moved through the operation shaft 1.
When 1 is rotated and terminals 13 of each phase of U, V, W (all terminals 13 are tangentially connected to the transformer coil 16) are connected as shown in the figure, the terminal block 9a outputs terminals 12 out of the terminals 12. A1 and B1 are connected, and the indicator lamp 17a connected via the indicator lamp lead 14 during this period is turned on. At this time, the indicator lights 17a to 17g connected to the terminal blocks 9a to 9c are not turned on.

Next, when the tap number 2 shown in FIG. 5B is connected, that is, when the terminal 13 is connected by the contact 11 as shown in the figure, the terminal block 9b has terminals A2 and B2 of the terminals 12. The spaces are connected by the contacts 20, and the indicator lamp 17b lights up. Other indicator lights 17a, 17c-1
7g does not light. It should be noted that the indicator lights that are not turned on thereafter are omitted from the drawing. Next, when the tap number 3 shown in FIG. 5C is connected, that is, when the terminal 13 is connected by the contact 11 as shown in the figure, the terminal block 9c makes contact between A3 and B3 of the terminals 12. 20 and the indicator lamp 17c is turned on. After that, similarly, when the tap number 4 is connected, C1 of the terminals 12 on the terminal block 9a is
D1 is connected and the indicator light 17d is turned on. When the tap number 5 is connected, the indicator lamp 17e connected between the terminals C2 and D2 on the terminal block 9b is turned on. Also, tap number 6
The indicator lamp 17f between the terminals D3 and E3 is turned on in the terminal block 9c when the connection is made, and the indicator lamp 17g between the terminals A1 and E1 is turned on in the terminal block 9a when the tap number 7 is connected.

FIG. 6 shows a terminal block 9a when switching each tap.
The connection diagram of each terminal 12 and indicator lamps 17a to 17g at 9c is shown.

Also in the second embodiment, since the indicator lamps 17a to 17e are turned on one after another in response to tap switching, the tap position is electrically detected, and it is possible to remotely monitor tap switching. Further, the same effects as those of the other embodiment 1 are obtained. The present invention can also be applied to the case of 4 to 6 taps.

[0017]

As described above, according to the present invention, the non-voltage tap switching for switchingably connecting the plurality of first terminals connected to the transformer coil by the first contacts attached to the operation shaft. In the container, a plurality of second terminals are switchably connected by a second contact attached to the operation shaft, and connection switching from the connected second terminals to the first terminal, that is, An electrical signal corresponding to tap switching can be taken out, and electrical detection of the tap position and remote monitoring can be performed. Moreover, it suffices to incorporate new parts into the conventional ones without increasing the size or cost.

[Brief description of drawings]

FIG. 1 is a side view and a front view of an operating portion of a voltageless tap changer according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a connection state between a transformer coil and a terminal.

FIG. 3 is a diagram showing a connection state of each terminal block in each tap state of the voltageless tap changer according to the first embodiment of the present invention.

FIG. 4 is a tangential circuit diagram of the terminals and the indicator lamp of the voltageless tap changer according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a connection state of each terminal block in each tap state of the voltageless tap changer according to the second embodiment of the present invention.

FIG. 6 is a connection circuit diagram of a terminal and an indicator lamp of a non-voltage tap changer according to a second embodiment of the present invention.

FIG. 7 is a vertical cross-sectional front view, a left side view, and a front view of an indicator of a conventional voltageless tap changer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Operation axis 9a-9c, 10a-10c ... Terminal block 11,20 ... Contact 12,13 ... Terminal 14 ... Indicator light lead 15 ... Tap lead 16 ... Transformer coil 17a-17g ... Indicator light

Claims (1)

[Claims] 1. A first terminal block having a plurality of first terminals connected to a transformer coil is fixedly supported, and each of the first terminals is attached by a first contact attached to an operating shaft.
In a non-voltage tap changer for switchingably connecting between terminals, a second terminal block having a plurality of second terminals is fixedly supported, and a second contact mounted on the operation shaft is used to connect each of the first to third terminals. Switchable connection between the two terminals,
A non-voltage tap changer, wherein a signal corresponding to a connection position between the first terminals is generated from between the second terminals.