EP3022749B1 - On-load tap changer - Google Patents

Description

The invention relates to an on-load tap changer. The on-load tap changer according to the invention comprises a switching tube, an energy store for setting a switching position of the switching tube, a detector for detecting a switching position of the on-load tap changer and an on-load tap changer gear. The on-load tap-changer mechanism mechanically couples the energy accumulator to the switching tube.

On-load tap-changers (abbreviated as OLTC) are well known and common in the prior art. They are used for the uninterrupted switchover between different winding taps of step transformers. On-load tap-changers are divided into load selector and diverter switch with selector.

Both types of on-load tap-changers are actuated by a motor drive (preferably an electric motor) when switching over. The motor drive moves an output or input shaft, which winds up a drive element of the on-load tap changer. This drive element causes, for example, the movement of a switching tube of the on-load tap changer and is usually referred to as an energy store (or also an energy store). When the energy accumulator is fully opened, ie when it is tensioned, it is released, releases its energy abruptly and actuates a switching tube in the period of milliseconds (ms), which then executes a specific switching sequence during load switching. Various switch contacts and resistance contacts are then actuated in a specific chronological order. The switch contacts serve for the direct connection of the respective winding tapping with the load derivation, the resistance contacts for the short-term connection, ie bridging by means of one or more switching resistors. Vacuum interrupters are advantageously used as switching elements for load switching. This is due to the fact that the use of vacuum interrupters for load switching prevents arcing in the oil and thus prevents oil contamination of the diverter switch oil, as is the case, for example, in the German patents DE 195 10 809 C1 and DE 40 11 019 C1 as well as the German published documents DE 42 31 353 A1 and DE 10 2007 004 530 A1 described.

The international patent application WO 98/38661 A1 discloses a motor drive for tap changers, diverters or plunger coils. The motor drive is used in particular to set the tap changer to the desired switching position. All the mechanical and electrical assemblies required to drive the tap changer are combined in the motor drive.

In the international patent application WO 2004/088693 A1 a step switch of the type of the reactor switch is described based thereon. This also includes a motor drive with a downstream gearbox, in particular a Geneva gear or lever-type gearbox.

The Chinese utility model CN 201242930Y discloses an on-load tap-changer head for an on-load tap-changer for uninterrupted switching between different on-load tap positions. The on-load tap-changer head includes an on-load tap-changer gear and a mechanical on-load tap position indicator. For this purpose, an indicator shaft of the on-load position indicator connects directly to a gear shaft of the on-load tap-changer gear. The on-load tap-changer head has a cover with a window through which the on-load position indicator can be read. In particular, end position mechanisms are provided so that the on-load tap changer cannot be connected via a start or end position.

The Chinese utility model CN 201167023Y discloses an on-load tap-changer transmission with a display mechanism for switching position indication of an on-load tap-changer. The. On-load tap-changer gear has a gear shaft to which a motor driving the switching tube of the on-load tap-changer can be coupled. The gear shaft drives an input shaft of the on-load tap-changer gear via a worm gear. A coupling element is formed on the underside of an end of the input shaft facing away from the motor, via which the input shaft is coupled to the switching tube of the on-load tap changer. To indicate the switching position, one end of the indicator shaft protrudes from the housing of the on-load tap-changer and is provided with a pointer which can be rotated against an indicator disc with switching position marks. The pointer can be optically enlarged for better readability.

A disadvantage of the on-load tap-changer gear with a display mechanism of the Chinese utility model CN 201167023Y is that the display mechanism picks up the movement of the input shaft to pull up an energy accumulator. The tap on the input shaft is prone to errors because any slip that may occur between the input shaft and the energy accumulator is not detected, so that the indication of the switching position is inaccurate.

From the DE 197 20 617 A1 a position reporting arrangement for a motor drive is known. This motor drive and thus also the position indicator arrangement are arranged on the outside of the high-voltage transformer and are connected to a tap changer, diverter or plunger coil, for example, via a linkage. The position reporting arrangement is used for remote position display or position information.

From the DE 2006 008 338 B3 an on-load tap changer with an energy accumulator is known. The energy accumulator has a support plate on which a gear wheel and a drive element are arranged. By actuating the gearwheel, the drive crank is actuated via the two stops of the drive element. A pull rod and several compression springs are attached to the drive crank. When the drive element is turned, the compression springs are tensioned and the energy accumulator is opened. After the energy accumulator has been triggered, the rotary movement of the drive element is transmitted to the selector shaft and thus to the Geneva wheel. Another one Role, the rotary movement of the drive element is transmitted to a Geneva wheel, which is connected to a position indicator.

DE 100 62 679 A1 discloses an on-load tap-changer comprising a switching tube, an on-load tap-changer gear, an energy store for setting a switching position of the switching tube, a detector for detecting the switching position of the on-load tap-changer, the detector being mechanically coupled to the energy accumulator via the on-load tap-changer transmission and an electronic signal for detecting the by means of the detector Switch position of the on-load tap changer can be output.

This document constitutes the prior art for claim 1.

The object of the invention is to provide an on-load tap-changer, the switching positions of the on-load tap-changer being able to be detected reliably, tamper-proof and in a manner not prone to errors. The on-load tap-changer should also be easy to maintain.

This object is achieved by an on-load tap changer which comprises the features of claim 1.

The invention relates to an on-load tap changer. The on-load tap changer according to the invention comprises a switching tube and an energy accumulator for setting a switching position of the switching tube. Furthermore, the on-load tap-changer comprises a detector for detecting a switching position of the tap-changer and an on-load tap-changer gear. Both the switching tube and the detector are mechanically coupled to the energy accumulator via the on-load tap-changer gear.

According to the invention, a preselector and possibly a fine selector of the on-load tap-changer are each mechanically coupled via the on-load tap-changer transmission to the energy accumulator for setting a switching position of the preselector with the detector for detecting its switching position. In this embodiment, the switching position of the on-load tap-changer results from a combination of the position of the switching tube, preselector and, if necessary, fine selector. The on-load tap-changer transmission, for example, couples a superposition of the movements of the switching tube, preselector and possibly fine selector into the detector.

In particular, the detector can detect a mechanical input signal that is coupled in via the on-load tap-changer transmission and convert it into an electronic signal of the switching position of the on-load tap-changer and output it. For example, an electronic circuit board can be provided in the detector, which processes the electronic signal further, for example, amplifies and / or digitizes it.

The detector can comprise a cam switching mechanism and / or an encoder system. In a particular embodiment, the detector comprises a cam switching mechanism which consists of at least one cam disk with a plurality of switching position positions and at least one cam. The at least one cam can be releasably connected at each switch position. The cam disk of the detector is used, for example, to detect the end position of the on-load tap-changer. In particular, incorrect switching of the on-load tap-changer can be avoided. For this purpose, the at least one cam disk can each be assigned at least one switch for detecting an end position of the on-load tap changer such that each switch can be actuated with at least one cam.

The actual detection of the switching position of the on-load tap-changer can be done via an encoder system take place, which is partially integrated on the cam disc. The sensor system can be designed, for example, as a Hall effect sensor, optical sensor or potentiometer. In a special embodiment of the invention, it comprises several sliding contacts and one grinder. At each switching position of the at least one cam disk, at least one sliding contact is formed, which can be electrically coupled to a slider.

A cam disk according to the invention is sufficient to completely record the end positions and switching positions of the on-load tap-changer. For safety reasons, however, the detector can be designed redundantly with several such cam disks. A grinder can simultaneously electrically couple the sliding contacts of two cam discs.

The advantage of such a modular cam disc is that the detector can be adapted to on-load tap changers with different numbers of switching positions by simply moving cams on the cam disc. In addition, the modular components of the detector can be standardized. This lowers the cost of producing and maintaining spare parts.

Furthermore, a detector housing for receiving the detector can be arranged on a cover of the on-load tap changer. In particular, a housing cover can be detachably attached, so that the detector can be easily serviced or replaced without having to dismantle the on-load tap-changer cover or remove the on-load tap-changer gear.

In addition to the detector for detecting the switching position of the on-load tap changer, a running detector can be provided. According to the invention, the running detector is assigned to an input shaft of the on-load tap-changer transmission, via which the energy accumulator can be pulled up. The running detector can detect the rotary motion of the input shaft and convert and output it as an electronic signal. If necessary, the input shaft couples to an electric motor or to a manual emergency operating means via a motor gear. The detection of their rotary movement makes it possible to monitor how the energy store is pulled up via the electric motor or the emergency actuation means.

The running detector can be designed as an encoder system, for example as a cam switch mechanism. The encoder system can be designed as an absolute encoder. Absolute encoders output length or angle information of a device to be measured in the form of an absolute, usually digitized, numerical value. Since no reference to a reference is necessary, they can start measuring operation immediately after switching on, which is advantageous for the simple and safe operation of the on-load tap-changer according to the invention.

The detector or the detector and the running detector are electrically connected to a control unit for controlling or regulating the on-load tap changer. As a result, the electric motor of the on-load tap-changer can be operated on the basis of the electrical signals from the detector and possibly the running detector be regulated, which ultimately drives the on-load tap-changer.

The inventive idea, which is implemented in the on-load tap-changer, is based on tapping the abrupt drive movement of the energy accumulator, which actually acts on the switching tube and possibly the selector, instead of a continuous movement of the input shaft, which pulls the energy accumulator on and not with the switching tube in Active connection is established. If the lift mechanism e.g. if it is jammed or is not fully opened by mistake, so that it does not trip, then the switching position displayed would fall apart from the actual switching position in an on-load tap changer of the prior art. So far, the detection of the switch position has been based on the rotary movement of the input shaft. The input shaft and the energy accumulator can move independently of each other. In contrast, according to the invention, only a change in the switching position can be detected when the energy store is actually actuated. In particular, this is ensured by the special embodiment of the rotary converter of the on-load tap-changer transmission. The rotary converter has a driver and a cam driver for coupling a movement of the energy accumulator onto the detector and onto the switching tube. Driver and cam driver are rigidly coupled to each other. This ensures that the energy accumulator always acts on the detector and switching tube at the same time. The movement of the energy accumulator is transmitted to the detector and the switching tube by a mechanical transmission mechanism of the on-load tap-changer transmission. The components of these transmission mechanisms can be stable, compact and slip-free. They are also located inside the on-load tap-changer, protected from environmental influences. As a result, the entire on-load tap-changer transmission is exposed to the same temperature range, so that thermally induced mechanical play or tension is avoided.

A major advantage of the invention lies above all in the simple coupling of the detector integrated in the on-load tap-changer gearbox for detecting the switching position of the on-load tap-changer. Existing state-of-the-art solutions, on the other hand, emulate the on-load tap-changer gearbox in the motor gearbox of the electric motor coupled to it. The associated coupling process and the synchronization of the electric motor and the on-load tap-changer becomes very complex and prone to errors. If the displayed and actual switching position differ, an erroneous coupling and switching process can lead to the end position limits being broken. This is excluded according to the invention. The simplification according to the invention replaces a control gear necessary for this coupling process. In addition, if a linkage or a shaft breaks in the control gear, this cannot be recognized immediately because the displayed and the actual shift position differ. In addition, the movement often has to be carried out over long distances for design reasons. The longer this distance, the greater the mechanical play tending to falsify the switch position. In addition, such an indirect control gear is associated with additional costs, which are eliminated according to the invention.

Another advantage of the invention is that the electric motor is expanded, for example, for normal maintenance work can be done without having to intervene in the mechanical coupling between the detector of the on-load tap-changer transmission and the switching tube. As a result, the displayed and the actual switching position of the tap changer cannot differ. When installing the electric motor, no complex recalibration of the displayed and actual switching position is necessary.

Fig. 1

eine Perspektivansicht eines erfindungsgemäßen Laststufenschalters in einer Ausführungsform eines dreiphasigen Lastwählers mit Vorwähler;

Fig. 2

eine Perspektivansicht auf das Laststufenschaltergetriebe des erfindungsgemäßen Laststufenschalters;

Fig. 3

eine weitere Perspektivansicht auf das Laststufenschaltergetriebe des erfindungsgemäßen Laststufenschalters;

Fig. 4

eine Perspektivansicht von unten auf das Laststufenschaltergetriebe des erfindungsgemäßen Laststufenschalters;

Fig. 5

eine weitere Perspektivansicht auf den oberen Teil des Laststufenschalters wobei der eingebaute Kraftspeicher sichtbar ist;

Fig. 6

eine Perspektivansicht auf den Deckel des erfindungsgemäßen Laststufenschalters aus Fig. 1 wobei eine Steuereinheit dargestellt ist;

Fig. 7

eine Perspektivansicht auf eine Ausführungsform des Detektors zur Erfassung der Schaltstellung des Laststufenschalters; und

Fig. 8

eine angeschnittene Perspektivansicht der in Fig. 7 gezeigten Ausführungsform des Detektors zur Erfassung der Schaltstellung des Laststufenschalters.

The invention and its advantages are described in more detail below with reference to the accompanying drawings. Show it:

Fig. 1

a perspective view of an on-load tap changer according to the invention in an embodiment of a three-phase load selector with preselector;

Fig. 2

a perspective view of the on-load tap-changer transmission of the on-load tap-changer according to the invention;

Fig. 3

a further perspective view of the on-load tap-changer transmission of the on-load tap-changer according to the invention;

Fig. 4

a perspective view from below of the on-load tap-changer transmission of the on-load tap-changer according to the invention;

Fig. 5

another perspective view of the upper part of the on-load tap-changer with the built-in energy accumulator is visible;

Fig. 6

a perspective view of the lid of the on-load tap changer according to the invention Fig. 1 a control unit being shown;

Fig. 7

a perspective view of an embodiment of the detector for detecting the switching position of the on-load tap changer; and

Fig. 8

a cut perspective view of the in Fig. 7 shown embodiment of the detector for detecting the switching position of the on-load tap changer.

Identical reference numerals are used for identical or identically acting elements of the invention. For the sake of clarity, only reference numerals are shown which are necessary for the description of the respective figure. The exemplary embodiments of the on-load tap-changer according to the invention do not represent any restriction of the scope of protection for the invention defined by the claims.

Fig. 1 shows a perspective view of an on-load tap-changer according to the invention in the form of a three-phase load selector 1. The load selector 1 here has an electric motor 3 with a gear 5 as a drive, which pulls up an energy store (not shown). When the energy accumulator is fully opened, ie when it is tensioned, it is released, releases its energy abruptly and actuates a switching tube 15. The rotating switching tube 15 is rotatably arranged in the oil vessel 18 so that different switching positions can be set. The oil vessel 18 is closed at the top with a lid 19 and also carries a bottom 21.

The load selector 1 according to the invention has three phases L1, L2, L3, which are arranged one above the other in the oil tank 18. A preselector 37 is attached to the switching tube above the three phases L1, L2, L3. Electrical connection elements 39 are arranged on the load selector 1 in such a way that they reach through a wall 17 of the oil vessel 18.

Fig. 2 shows a perspective view of the on-load tap-changer gear 100 of the on-load tap-changer 1 according to the invention. The on-load tap-changer gear 100 is arranged on a mounting plate 101, which is detachably connected to the cover 19 of the on-load tap-changer 1, shown as a cut. An input shaft 9 is coupled to an electric motor 3 via a motor transmission 5. The input shaft 9 drives a rotary converter 110 in order to have an energy accumulator 13 coupled to the rotary converter 110 (see Fig. 5 ) wind up. The input shaft 9 typically executes half a revolution. A full revolution of the input shaft 9 is also conceivable. As soon as the energy store 13 is fully opened, it is released and causes the rotary converter 110 to rotate. On the one hand, the rotary converter 110 drives a Maltese cross 120, to which the switching tube 15 and, via a preselector driver 140, is connected to a preselector 37. By means of a suitable mechanical transmission, the switching tube 15 rotates, for example, by an angle of 30 ° per switching operation. The selection is switched, for example, from a "plus position" via a "zero position" to a "minus position". On the other hand, the rotary converter 110 drives a rotary sensor 130, which in turn drives a display driver 150. The display driver 150 effects a rotary movement in the detector 200 of, for example, one twentieth of a revolution per 30 ° rotation of the switching tube 15. Furthermore, the preselection driver 140 couples the switching movement of the preselector 37 to rotary transducer 130, which likewise acts on the detector 200 via the display driver 150. This effect can consist, for example, in that the direction of rotation of the twentieth rotation caused by the switching tube 15 is reversed in the detector 200. Depending on the design of the transmission, it may be necessary to shift the shift tube 15 to a defined shift position 201, 202 or 203 before the preselector 37 can be wired. This can be an additional "zero position" of the switching tube 15. Thus, the switching movements of the switching tube 15 and the preselector 37 can be simultaneously coupled into the detector 200 and detected via the on-load tap-changer transmission 100. Both the position of the switching tube 15 and the preselector 37 go into the switch position of the on-load tap changer 1 which can be detected in this way. If, for example, the switching tube 15 has 8 switching positions and the zero position and the preselector 37 have a “plus position” and a “minus position”, a total of 19 results for the on-load tap changer 1 Switch positions that can be represented on the detector 200, for example, as "-8, ..., -1, 0, +1, ..., +8". For example, the switching position "-3" means that the preselector 37 is in the "minus position" and the switching tube is in the third of eight switching positions. Analogous to the preselector 37, a fine selector (not shown) can also be integrated into the switching position detection via the on-load tap-changer transmission 100.

The energy accumulator 13 is pulled up by the electric motor 3 via an input shaft 9. When it is fully wound, it is released so that it snaps back into its rest position. In this case, the on-load tap-changer transmission 100 couples the energy store 13 to the switching tube 15 in such a way that at least part of its kinetic energy is transferred into a rotary movement of the switching tube 15. At the same time, the on-load tap-changer transmission 100 couples the energy store 13 to the detector 200 in such a way that it starts a movement. The movement recorded by the detector 200 is correlated via the on-load gear 100 with the rotary movement of the switching tube 15 and consequently a measure of the rotary movement of the switching tube 15. For example, a display shaft 151 connected to the detector 200 rotates through an angle of 5 ° when that Switch tube rotates by 30 °. When unlatching, the input shaft 9 is preferably decoupled from the energy accumulator 13 and coupled in again when the energy accumulator 13 has reached the rest position, so that the input shaft 9 does not perform any movement opposite to the relaxing energy accumulator 13. Alternatively, you can. the coupling between the energy accumulator 13 and its input shaft 9 also remain and only the electric motor 3 is switched off so that it can be rotated by the energy accumulator 13 with little energy expenditure.

Fig. 3 . 4 and 5 show a different perspective view of the on-load tap-changer transmission 100 of the on-load tap-changer 1. For the sake of clarity, the energy accumulator 13 is only shown in FIG Fig. 5 shown.

The input shaft 9 of the on-load tap-changer transmission 100 is driven by an electric motor 3 via a motor housing 5. An input shaft gear 115 of the input shaft 9 drives a crank 113 of the rotary converter 110 via a rotary pickup gear 116 of the rotary converter 10. The crank 113 tensions the energy accumulator 13. As soon as the crank 113 has fully opened the energy accumulator 13, it is automatically unlatched from the input shaft gear 115 of the input shaft 9 and driven by the energy store 13. The unlatched crank 113 drives the rotary converter 110. The rotary converter 110 drives a first cam disk 131 of a rotary sensor 130 via a first driver 111 with a first driver wheel 112 and a maltese disk 120 via a Maltese driver 114. The Maltese disk 120 drives a shift tube 15 on the one hand On-load tap-changer 1 and, on the other hand, a preselector driver 140 for driving a preselector 37 of on-load tap-changer 1. The preselector driver 140 drives a second cam disk 132 of the rotary sensor 130 via a second driver 141 with a second driver wheel 142. A rotary sensor gear 145 of the rotary sensor 140 drives directly or via an intermediate gearwheel 146 an indicator shaft gear 152 which is axially and rigidly connected to one Display shaft 151 is seated, so that a rotary movement of the display shaft 151 is effected. The display shaft 151 is mechanically coupled to the detector 200. The rotational movement of the display shaft 151 is detected by the detector 200 and converted into an electrical signal and output. Furthermore, a running detector 300 is arranged on the input shaft 9. The running detector is designed, for example, as an encoder system or cam switching mechanism and detects the rotary movement of the input shaft 9 and thus indirectly the drive movement of the electric motor 3 via the motor gear 5.

Fig. 6 shows a perspective view of the cover 19 of the on-load tap changer 1 and its connection to a control unit 400. The indicator shaft 151 is guided through an opening (not shown) in the cover 19, so that the detector 200 can be arranged on the cover 19. A detector housing 240 for receiving the detector 200 is formed on the cover 19. The detector housing 240 is provided with a detector housing cover 241 (see Fig. 1 ) can be closed and opened so that the detector 200 can be easily accessed and, if necessary, exchanged without having to remove the cover 19. Likewise, the running detector 300 is accommodated in an intermediate housing 14. The detector 200, the running detector 300, the electric motor 3 directly or a motor controller 430 of the electric motor 3, and / or a transmission controller 450 of the motor transmission 5 are connected to a control unit 400 for controlling and / or regulating the on-load tap changer 1 via control lines 401. In a control loop, the control unit 400 can regulate the electric motor 430, for example, on the basis of the signals from the detector 200 and the running detector 300.

Figs. 7 and 8th show a perspective view of an embodiment of the detector 200 for detecting the switching position of the on-load tap changer 1 according to the invention Fig. 7 the cam disc 211 is shown cut. The detector 200 consists of an electronic circuit board 230 with circuit board contacts 231. The circuit board 230 carries a cam switching mechanism 210. This cam switching mechanism 210 consists of at least one cam disk 211 with a plurality of switch position positions 201, 202, 203 and at least one cam 212. The at least one cam 212 releasably connectable at each switch position 201, 202, 203. On the top 232 and on the bottom (not shown in this perspective view) of the circuit board 230, a cam disk 211 is rotatably mounted and can be coupled to the indicator shaft 151 of the on-load tap-changer gear 100. For each switching operation of the switching tube 15, this cam disk 211 makes one twentieth of a revolution, for example. The direction of rotation of this revolution is determined by the on-load tap-changer gear 100 from the position of the preselector 37. At least one switch 220 for detecting an end position 201 of the on-load tap changer 1 is assigned to the at least one cam disk 211 in each case. Each switch 220 can be actuated in this way with at least one cam 212.

Furthermore, the detector comprises an encoder system 250. The encoder system 250 comprises a plurality of sliding contacts 214 and a slider 215, which is rigidly connected to the circuit board. At every Switch position 201, 202, 203 of the at least one cam disk 210 is formed at least one sliding contact 214, which can be electrically coupled to the slider 215. In principle, a cam disk 211 according to the invention in the detector 200 is sufficient to detect the switching position of the on-load tap changer 1. For safety reasons, however, the detector 200 is redundantly provided with the second and possibly further cam disks 211. A grinder 215 can be assigned to two adjacent cam disks 211. The electronic circuit board 230 can, for example, further process the switching position position 201, 202, 203 detected by the detector 200 into an electronic signal, for example amplify and / or digitize it.

It is self-evident to the person skilled in the art that the device features of the embodiments described above can be used individually and combined with one another in an on-load tap changer according to the invention according to one of the following claims without leaving the scope of protection defined by them.

LIST OF REFERENCE NUMBERS

1

On-load tap-changer, load selector

3

electric motor

5

Engine / gear

9

Input shaft

12

spring assembly

13

Energy storage, energy storage

14

intermediate housing

15

switching tube

17

wall

18

oil vessel

19

cover

21

ground

37

selection

39

Electrical connection elements

100

OLTC transmission

101

mounting plate

110

rotary converter

111

first driver

112

first driving wheel

113

crank

114

Maltese drivers

115

Input shaft gear

116

Drehaufnehmerzahnrad

120

geneva

130

Drehaufnehmer

131

first cam gear

132

second cam gear

140

Vorwählertreiber

141

second driver

142

second drive wheel

143

third driver

144

third drive wheel

145

Drehaufnehmerzahnrad

146

intermediate gear

150

display driver

151

indicator shaft

200

Switching position detector

201, 202,

Switching position positions

210

cam

211

disc

212

cam

213

Got over

214

sliding contact

215

grinder

216

adapter

217

against adapter

220

switch

221

lever

222

electrical contacts

230

circuit board

231

platinum contacts

240

detector housing

241

Detector housing cover

250

encoder system

300

overflow detector

400

control unit

401

electrical control lines

430

motor control

430

transmission control

L1, L2, L3

phase

Claims (8)

1. On-load tap changer (1) comprising

   - a switching tube (15),

   - a preselector (37);

   - an on-load tap changer transmission (100) with a rotation translator (11), a rotation pick-up (130) and a preselector driver (140), which is mechanically coupled to the switching tube (15) and the preselector (37);

   - an energy store (13) for setting a switch setting of the switching tube (15);

   - a detector (200) for detecting the switch setting of the on-load tap changer (1), which is a combination of the setting of the switch tube (15) and the preselector (37); and

   - a control unit (400) with which the detector (200) is electrically connected for regulation of the on-load tap changer (1);

   wherein

   - the energy store (13) and the switching tube (15) are mechanically coupled by way of the on-load tap changer transmission (100);

   - the preselector (37) is actuated by way of the on-load tap changer transmission (100);

   - the detector (200) is mechanically coupled with the energy store (13) by way of the on-load tap changer transmission (100);

   - an electronic signal for detection of the switch setting of the on-load tap changer (1) can be output by means of the detector (200); and

   - the control unit (400) is arranged to regulate an electric motor of the on-load tap changer (1) on the basis of the electronic signal.
2. On-load tap changer (1) according to the preceding claim, wherein

   - the detector (200) comprises a cam switching mechanism (210) and/or transmitter system (250).
3. On-load tap changer (1) according to the preceding claim, wherein

   - the cam switching mechanism (210) consists of at least one cam disc (211) with a plurality of switch setting positions (201, 202, 203) and at least one lobe (212), which is detachably connectible at each switch setting position (201, 202, 203).
4. On-load tap changer (1) according to the preceding claim, wherein

   - at least one switch (220) for detection of an end setting position (201) of the on-load tap changer (1) is so associated with each cam disc (211) that each switch (220) is actuable by at least one of the lobes (212).
5. On-load tap changer (1) according to the preceding claim or the claim before that, wherein

   - the transmitter system (250) comprises a plurality of wiper contacts (214) and a wiper (215); and

   - at least one wiper contact (214), which is electrically connectible with the wiper (215), is formed at each switch setting position (201, 202, 203).
6. On-load tap changer (1) according to any one of the preceding claims, wherein

   - a detector housing (240) for receiving the detector (200) is arranged on a cover (19) of the on-load tap changer (1).
7. On-load tap changer (1) according to any one of the preceding claims, wherein

   - associated with a drive input shaft (9) of the on-load tap changer transmission (100) for drawing up the energy store (13) is a movement detector (300) for detection of its rotational movement so that a rotational movement of the drive input shaft (9) can be output as an electronic signal.
8. On-load tap changer (1) according to the preceding claim, wherein

   - the detector (200), or the detector (200) and the movement detector (300), is or are electrically connected with a control unit (400) for control or regulation of the on-load tap changer (1).

Images