CN210837424U - Voltage regulating coil and transformer for increasing one time voltage regulating gear - Google Patents
Voltage regulating coil and transformer for increasing one time voltage regulating gear Download PDFInfo
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- CN210837424U CN210837424U CN201921830635.9U CN201921830635U CN210837424U CN 210837424 U CN210837424 U CN 210837424U CN 201921830635 U CN201921830635 U CN 201921830635U CN 210837424 U CN210837424 U CN 210837424U
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Abstract
The utility model provides a voltage regulating coil and a transformer for improving one time voltage regulating gear, relating to the technical field of transformer voltage regulation, comprising a voltage regulating circle region, an offset voltage regulating circle region and a change-over switch; the voltage regulating turn region is connected with the tail end of the main coil; the public end of the change-over switch is connected with one end of the voltage-regulating output line, the first change-over end of the change-over switch is connected with one end of the bias voltage-regulating turn zone, and the other end of the bias voltage-regulating turn zone is a position selection end; the second switching end of the switch is connected with the position selection end; the position selection end is used for selecting the voltage regulation gear from the voltage regulation circle region to communicate to make the voltage regulation voltage between the other end of transformer output voltage regulation output line and the head end of main coil, wherein, the voltage regulation gear is according to first voltage regulation voltage volume regulating voltage, and biasing voltage regulation circle region is used for according to second voltage regulation voltage volume regulating voltage, through setting up biasing voltage regulation circle region, when reducing the shunting and taking a percentage, provides more quantity's voltage regulation gear, can export more kind voltage.
Description
Technical Field
The utility model belongs to the technical field of the technique of transformer pressure regulating and specifically relates to a improve one time pressure regulating gear voltage regulating coil and transformer.
Background
With the development of transformer technology, the application of the current transformer is more and more extensive, and the transformer needs to be adapted to more and more application occasions. For the application condition that the on-load voltage regulation gear of the transformer is more and the voltage regulation voltage of each stage is smaller, the transformer is generally required to be provided with a plurality of voltage regulation turn areas, and the problems that the tapping tap of the voltage regulation coil is more, the outgoing line quantity is more, and the spiral angle is large and is not beneficial to ampere-turn balance can occur at the moment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an improve one time pressure regulating gear voltage regulation coil and transformer, through setting up biasing pressure regulating circle district, when reducing the shunting and taking a percentage, provide more quantity's pressure regulating gear, can export more kind of voltage.
In a first aspect, an embodiment of the present invention provides a voltage regulating coil for increasing one-time voltage regulation gear, including a voltage regulating turn region, an offset voltage regulating turn region and a switch;
the voltage regulating turn region is connected with the tail end of a main coil of the transformer and comprises a plurality of voltage regulating gears;
the public end of the change-over switch is connected with one end of a voltage regulating output line, the first change-over end of the change-over switch is connected with one end of the bias voltage regulating turn zone, and the other end of the bias voltage regulating turn zone is a position selecting end; the second switching end of the switch is connected with the position selection end;
the position selection end is used for selecting the voltage regulating gears from the voltage regulating turn zone to be communicated so as to enable the transformer to output voltage regulating voltage between the other end of the voltage regulating output line and the head end of the main coil, wherein the voltage regulating gears regulate voltage according to a first voltage regulating voltage quantity, and the offset voltage regulating turn zone is used for regulating voltage according to a second voltage regulating voltage quantity.
In an alternative embodiment, the first regulated voltage amount is twice the second regulated voltage amount.
In an optional embodiment, the voltage regulation turn region includes n voltage regulation steps and n +1 tap taps.
In an optional implementation manner, the position selection end selects a voltage regulating gear corresponding to the tap from the voltage regulating turn area by communicating the tap.
In an optional embodiment, any end of the voltage regulating turn region is connected to the tail end of the main coil, and the any end includes the head end of the voltage regulating turn region and the tail end of the voltage regulating turn region.
In an optional embodiment, the transformer further comprises an on-load tap-changer, a common end of the on-load tap-changer is connected with the tail end of the main coil, a first switching end of the on-load tap-changer is connected with the head end of the voltage regulating turn region, and a second switching end of the on-load tap-changer is connected with the tail end of the voltage regulating turn region.
In an optional embodiment, the on-load tap changer is configured to selectively access a head end of the tap changing circle region or a tail end of the tap changing circle region.
In an optional embodiment, the position selecting device further includes a tail output line of the main coil, and the position selecting terminal is further configured to be connected to the tail output line of the main coil.
In an alternative embodiment, a controller is further included for controlling switching operations of one or more of the on-load tap changer, the position selection terminal and the diverter switch.
In a second aspect, the embodiment of the present invention provides a transformer, including as any one of the preceding embodiments improve one time voltage regulation gear voltage regulation coil and transformer main body, improve one time voltage regulation gear voltage regulation coil with the transformer main body is connected.
The embodiment of the utility model provides an improve one time pressure regulating gear pressure regulating coil and transformer, through the pressure regulating gear that reduces the pressure regulating circle district, and set up biasing pressure regulating circle district, the more different voltage of transformer output, the voltage of the adjustable first pressure regulating voltage volume of pressure regulating gear this moment, the biasing pressure regulating circle district of setting up second pressure regulating voltage volume again, whether even go into biasing pressure regulating circle district through change over switch selection, different pressure regulating gears in the pressure regulating circle district are selected to the position selection end, accomplish the switching selection of different pressure regulating gears, can realize when reducing the shunting of pressure regulating circle district and take a percentage, provide the pressure regulating gear of more quantity, can export more kind voltage.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is one of schematic structural diagrams of a voltage regulating coil for doubling voltage regulating gear provided in an embodiment of the present invention;
fig. 2 is a second schematic view of a voltage regulating coil for increasing the voltage regulating gear by one time according to an embodiment of the present invention;
fig. 3 is a third schematic view of a voltage regulating coil structure for increasing one time voltage regulating gear according to an embodiment of the present invention;
fig. 4 is a fourth schematic diagram of the voltage regulating coil structure for doubling the voltage regulating gear provided by the embodiment of the present invention.
Icon: 1-the head end of the main coil; 2, a main coil; 3-tail end of the main coil; 4-voltage regulating turn zone; 5-position selection end; 6-voltage regulation output line; 7-offset voltage-regulating turn zones; 8-a diverter switch; 9-on-load tap-changer.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
At present, in international application occasions such as North American market, a transformer with more load tap positions and smaller tap voltage quantity of each stage is required, and here, a transformer requiring +/-16 × 0.625% tap positions is taken as an example.
As shown in fig. 1, as an alternative embodiment, the transformer includes a main coil and a voltage regulating coil for increasing the voltage of one-time voltage regulating step, wherein the voltage regulating turns of the voltage regulating coil for increasing the voltage of one-time voltage regulating step are used for dividing 16 voltage regulating steps, and the tap numbers a-q are the tap numbers a-q, that is, the tap numbers a-q divide the voltage regulating coil of the transformer into 16 parts. The number of voltage regulating turn regions for voltage division is selected through the matching of the tail end of the main coil and the position selection end, multi-gear voltage regulation is achieved, and then various different output voltages are obtained.
The specific process is that the position selection end selects tapping positions on 17 tapping taps of the voltage regulating coil, and the tail end of the main coil is switched between a positive end and a negative end through an on-load tap switch, so that the number of turns of the voltage regulating coil between the tail end of the main coil and the position selection end is selected, the total number of turns of the main coil is changed, and multi-gear voltage regulation is realized.
According to the method, when a positive and negative regulation structure is adopted, 16 voltage regulation turn regions are required to be arranged on the voltage regulation coil, and 17 tap taps are arranged at the upper part and the lower part of the voltage regulation coil, so that the voltage regulation coil is large in outgoing line quantity and complex in outgoing line structure.
Meanwhile, the common structure of the voltage regulating coil is a multi-strand spiral structure, when 16 voltage regulating turn regions are required to be arranged, the spiral angle of the voltage regulating coil is large, the axial force is large, the installation distribution of the transformer is poor, the balance of ampere turns is not facilitated, and the short circuit bearing capacity is poor.
For example, if the voltage is regulated on the low-voltage side of the transformer with the main coil turn number of 80 turns, the voltage variation range is +/-16 × 0.625.625% +/-10%, the turn number of the regulating coil is one tenth of the turn number of the main coil, namely 8 turns, at the moment, 16 turn areas are required to be arranged according to the voltage variation range, the turn number of each turn area is 0.5 turns, and the turn number of the regulating coil of the actual transformer is an integer, so the method cannot be realized by adopting the mode.
Based on this, the embodiment of the utility model provides a pair of improve one time pressure regulating gear voltage regulation coil and transformer can be through setting up biasing pressure regulating circle district, when reducing the shunting and taking a percentage, provides more quantity's pressure regulating gear, can export more kind voltage.
The following is a detailed description by way of example.
Fig. 2 is the embodiment of the utility model provides a pair of improve one time pressure regulating gear pressure regulating coil structure sketch map.
The voltage regulating coil for improving the one-time voltage regulation gear position, which is provided by referring to fig. 2, is applied to a transformer and comprises a voltage regulating turn zone 4, an offset voltage regulating turn zone 7 and a change-over switch 8;
the voltage regulating turn zone 4 is connected with the tail end 3 of the main coil, and the voltage regulating turn zone 4 comprises a plurality of voltage regulating gears;
the common end of the change-over switch 8 is connected with one end of the voltage regulating output line 6, the first switching end of the change-over switch 8 is connected with one end of the bias voltage regulating turn zone 7, and the other end of the bias voltage regulating turn zone 7 is a position selection end 5; the second switching end of the switch 8 is connected with the position selection end 5;
the position selection end 5 is used for selecting a voltage regulating gear from the voltage regulating turn zone 4 to be communicated so that the transformer outputs voltage regulating voltage between the other end of the voltage regulating output line 6 and the head end 1 of the main coil, wherein the voltage regulating gear regulates the voltage according to a first voltage regulating voltage quantity, and the offset voltage regulating turn zone 7 is used for regulating the voltage according to a second voltage regulating voltage quantity.
In practical application's preferred embodiment, through reducing the pressure regulating gear of pressure regulating circle district 4, the voltage of the adjustable first pressure regulating voltage volume of pressure regulating gear this moment, set up the biasing pressure regulating circle district 7 of second pressure regulating voltage volume again, whether select to link into biasing pressure regulating circle district 7 through change over switch 8, position selection end 5 selects the different pressure regulating gears in pressure regulating circle district 4, can realize when reducing the tapping, provide more quantity's pressure regulating gear, can export more kind voltage.
The voltage regulating turn zone 4 comprises n voltage regulating gears and n +1 tapping taps.
As an optional implementation manner, any end of the voltage regulating turn region 4 is connected with the tail end 3 of the main coil, and any end includes the head end of the voltage regulating turn region 4 and the tail end of the voltage regulating turn region 4.
The method specifically comprises the following pressure regulating conditions:
1. if the head end of the voltage regulating turn region 4 is connected with the tail end 3 of the main coil, the change-over switch 8 selects a second switching end P2, namely the offset voltage regulating turn region 7 is not communicated with the voltage regulating turn region 4 in the voltage regulating coil, corresponding tapping taps are selected from n voltage regulating gears of the voltage regulating turn region 4 through the position selection end 5 at the moment, further, the communication of different voltage regulating gears is realized, and different transformer voltages are output; if the position selection terminal 5 is communicated with the tap taps g, the voltage regulating turn zone 4 is communicated with the voltage regulating gears between the tap taps g-i, and the output voltage of the transformer is the voltage at two ends of the AC and corresponds to the voltage regulating gear parts between the tap taps g-i in the main coil 2 and the voltage regulating turn zone 4.
2. If the head end of the voltage regulating turn region 4 is connected with the tail end 3 of the main coil, the first switching end P1 is selected by the change-over switch 8, namely when the bias voltage regulating turn region 7 is communicated with the voltage regulating turn region 4 in the voltage regulating coil, corresponding tapping taps are selected from n voltage regulating gears of the voltage regulating turn region 4 through the position selection end 5, then the communication between different voltage regulating gears and the bias voltage regulating turn region 7 is realized, and then different transformer voltages are output; if the position selection terminal 5 is communicated with the tap g, the voltage regulating turn zone 4 is communicated with the voltage regulating gear between the tap taps g-i, the output voltage of the transformer is the voltage at two ends of the AC, and the voltage regulating gear corresponds to the voltage regulating gear parts between the tap taps g-i in the main coil 2, the offset voltage regulating turn zone 7 and the voltage regulating turn zone 4.
3. As shown in fig. 3, if the tail end of the voltage regulating turn region 4 is connected to the tail end 3 of the main coil, the second switching end P2 is selected by the change-over switch 8, that is, the offset voltage regulating turn region 7 is not communicated with the voltage regulating turn region 4 in the voltage regulating coil, then the corresponding tap is selected from n voltage regulating steps of the voltage regulating turn region 4 through the position selection end 5, so as to realize the communication of different voltage regulating steps and output different transformer voltages; if the position selection terminal 5 is communicated with the tap taps g, the voltage regulating turn zone 4 is communicated with the voltage regulating gears between the tap taps g-a, the output voltage of the transformer is the voltage at two ends of the AC, and the voltage regulating voltage corresponds to the voltage regulating gear part between the tap taps g-a in the main coil 2 and the voltage regulating turn zone 4.
4. If the tail end of the voltage regulating turn region 4 is connected with the tail end 3 of the main coil, the first switching end P1 is selected by the change-over switch 8, namely when the offset voltage regulating turn region 7 is communicated with the voltage regulating turn region 4 in the voltage regulating coil, corresponding tapping taps are selected from n voltage regulating gears of the voltage regulating turn region 4 through the position selection end 5, then the communication between different voltage regulating gears and the offset voltage regulating turn region 7 is realized, and then different transformer voltages are output; if the position selection terminal 5 is communicated with the tap g, the voltage regulating turn zone 4 is communicated with a voltage regulating gear between the tap taps g-a, and the output voltage of the transformer is voltage at two ends of the AC and corresponds to the voltage regulating gear parts among the tap taps g-a in the main coil 2, the offset voltage regulating turn zone 7 and the voltage regulating turn zone 4.
It should be noted that, as an exemplary example in fig. 2 and fig. 3, the voltage regulating turn section 4 includes 8 voltage regulating gears, and the number of voltage regulating gears in the voltage regulating turn section 4 is not limited to this.
In order to realize more changeable pressure regulating condition to adaptation practical application scene, as shown in fig. 4, the embodiment of the utility model provides a still can be connected with the tail end 3 of main coil including having tap-changer 9, the public end that has tap-changer 9, have first switching end of tap-changer 9 to be connected with the head end of pressure regulating circle district 4, the second switching end is connected with the tail end of pressure regulating circle district 4.
Here, on-load tap-changer 9 is used for selecting to insert the head end of pressure regulating circle district 4 or the tail end of pressure regulating circle district 4, switches between + end (first switching end) and-end (second switching end) through on-load tap-changer 9, and the condition of accessible pressure regulating circle district 4 is selected in a flexible way to the setting of accessible on-load tap-changer 9, and then communicates the different pressure regulating gears in pressure regulating circle district 4, and the pressure regulating change condition is abundanter.
Taking a transformer requiring 16 × 0.625% voltage regulation gears in practical application as an example, the required transformer can realize 0.625% U of each voltage regulation gearNAnd (4) regulating the voltage.
Here, if 8 voltage-regulating steps are provided in the voltage-regulating turn zone 4, the voltage-adjustable first voltage-regulating electric quantity of each voltage-regulating step is 2 × 0.625%, namely 1.25% UN(ii) a An offset voltage regulating turn zone 7 is arranged on the voltage regulating turn zone 4, and at the moment, the second voltage regulating voltage quantity of the offset voltage regulating turn zone 7 is 0.625 percent UN. When the voltage of the transformer needs to be regulated to be odd number of 0.625% UNThen, connecting the bias voltage regulating turn region 7 into the voltage regulating turn region 4; when the voltage to be regulated by the transformer is even 0.625% UNAnd in the time, the offset voltage regulating turn region 7 is not connected with the voltage regulating turn region 4, and the voltage regulating turn region 4 independently regulates the voltage. By adopting the mode, 8 voltage regulating gears are arranged in the voltage regulating turn zone 4, and the technical purpose of 16-gear voltage regulation is realized.
It can be understood that, because the voltage regulation circle region 4 sets 8 voltage regulation gears, 9 tap taps can be led out from the voltage regulation circle region 4, and in addition, 2 tap taps of the offset voltage regulation circle region 7 total 11 tap taps, compared with 17 tap taps generated by conventional 16 voltage regulation gears, the number of the tap taps is greatly reduced. The helical angle of the voltage regulating coil with the structure is reduced, so that ampere-turn balance is facilitated, and short-circuit axial electromotive force is reduced.
In addition, if the voltage regulating coil with the structure is adopted by the large-capacity voltage regulator, the voltage regulating coil is applied to low-voltage side voltage regulation, and the problem that the voltage regulating voltage of each voltage regulating gear is too small and cannot be realized can be solved.
The number of turns (the number of voltage regulation gears) of the voltage regulation turn zone 4 is calculated according to the voltage 2 times of the voltage regulation voltage quantity corresponding to each voltage regulation gear, and at the moment, the number of the voltage regulation gears can be reduced to half of the number of conventional voltage regulation gears for regulating voltage according to the voltage regulation voltage quantity. Here, the offset voltage regulation turn region 7 is wound according to the amount of the voltage regulation voltage. The voltage regulation of the actual transformer is realized through the series-in and the removal of odd-even voltage regulation gears.
Here, in order to realize the monitoring to the 2 pressure regulating circumstances of main coil better, the embodiment of the utility model provides a tail end 3 output lines that still include the main coil, position selection end 5 still is used for being connected with the tail end 3 output lines of main coil. The voltage of the transformer corresponding to the primary winding 2 can be obtained by detecting the terminals AB.
As an alternative embodiment, the present invention may further include a controller for controlling the switching operation of one or more of the on-load tap changer 9, the position selecting terminal 5 and the change-over switch 8. According to the actual voltage regulation condition of the transformer, the controller controls the on-load tap changer 9 and the change-over switch 8 to respectively select the first change-over end or the second change-over end, and the control position selection end 5 selects a tap of the voltage regulation turn zone 4, so that the selection of a voltage regulation gear is realized.
Further, the embodiment of the utility model provides a still provide a transformer, include as above improve one time pressure regulating gear voltage regulating coil and transformer main part, improve one time pressure regulating gear voltage regulating coil and transformer main part and be connected.
Here, adopt above-mentioned transformer of improving one time voltage regulation gear voltage regulation coil to be adaptable to needing more voltage regulation gear, the adjustable voltage regulation voltage volume of voltage regulation gear is less, intensive condition, does benefit to ampere-turn balance, has better application effect.
The embodiment of the utility model provides a transformer, the improvement one time pressure regulating gear pressure regulating coil that provides with above-mentioned embodiment has the same technical characteristic, so also can solve the same technical problem, reach the same technological effect.
In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A voltage regulating coil for improving one-time voltage regulating gear is characterized by comprising a voltage regulating turn area, an offset voltage regulating turn area and a change-over switch;
the voltage regulating turn region is connected with the tail end of a main coil of the transformer and comprises a plurality of voltage regulating gears;
the public end of the change-over switch is connected with one end of a voltage regulating output line, the first change-over end of the change-over switch is connected with one end of the bias voltage regulating turn zone, and the other end of the bias voltage regulating turn zone is a position selecting end; the second switching end of the switch is connected with the position selection end;
the position selection end is used for selecting the voltage regulating gears from the voltage regulating turn zone to be communicated so as to enable the transformer to output voltage regulating voltage between the other end of the voltage regulating output line and the head end of the main coil, wherein the voltage regulating gears regulate voltage according to a first voltage regulating voltage quantity, and the offset voltage regulating turn zone is used for regulating voltage according to a second voltage regulating voltage quantity.
2. The step up voltage tap winding of claim 1, wherein the first voltage tap amount is twice the second voltage tap amount.
3. The double-tap-position-increasing voltage regulating coil according to claim 1, wherein the voltage regulating turn region comprises n voltage regulating positions and n +1 tap taps.
4. The double-voltage-regulating-gear-position-increasing voltage-regulating coil according to claim 3, wherein the position selection end selects a voltage-regulating gear corresponding to the tap from the voltage-regulating turn zone by communicating the tap.
5. The voltage regulating coil for improving the one-time voltage regulation gear according to claim 1, wherein any end of the voltage regulating turn region is connected with the tail end of the main coil, and the any end comprises the head end of the voltage regulating turn region and the tail end of the voltage regulating turn region.
6. The double-tap-position-increasing voltage-regulating coil according to claim 5, further comprising an on-load tap-changer, wherein a common end of the on-load tap-changer is connected with a tail end of the main coil, a first switching end of the on-load tap-changer is connected with a head end of the voltage-regulating turn region, and a second switching end of the on-load tap-changer is connected with a tail end of the voltage-regulating turn region.
7. The double-tap-position-improvement voltage-regulating coil according to claim 6, wherein the on-load tap switch is used for selectively connecting to the head end of the voltage-regulating turn region or the tail end of the voltage-regulating turn region.
8. The double-voltage-regulation-gear voltage-regulating coil for improving the voltage regulation according to claim 1, further comprising a tail-end output line of the main coil, wherein the position selection end is further used for being connected with the tail-end output line of the main coil.
9. The double tap gear step up voltage regulation coil of claim 7 further comprising a controller for controlling switching operation of one or more of the on-load tap changer, position selector terminal and the diverter switch.
10. A transformer, characterized in that it comprises the double step-up tap changing coil and the transformer body as claimed in any one of claims 1 to 9, said double step-up tap changing coil being connected to said transformer body.
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| CN201921830635.9U CN210837424U (en) | 2019-10-29 | 2019-10-29 | Voltage regulating coil and transformer for increasing one time voltage regulating gear |
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| CN201921830635.9U CN210837424U (en) | 2019-10-29 | 2019-10-29 | Voltage regulating coil and transformer for increasing one time voltage regulating gear |
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