WO2012079261A1 - Single-phase high-voltage testing transformer - Google Patents
Single-phase high-voltage testing transformer Download PDFInfo
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- WO2012079261A1 WO2012079261A1 PCT/CN2010/080085 CN2010080085W WO2012079261A1 WO 2012079261 A1 WO2012079261 A1 WO 2012079261A1 CN 2010080085 W CN2010080085 W CN 2010080085W WO 2012079261 A1 WO2012079261 A1 WO 2012079261A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
Definitions
- the invention relates to the technical field of transformers, in particular to a single-phase high-voltage test transformer. Background technique
- test transformer is an important part of the transformer test equipment. When the voltage level is required to be high, several test transformers are usually connected by cascade connection. This forms a cascade test transformer. However, the impedance of the cascade test transformer is large, usually around 16%. The cascade test transformer that meets the high voltage and low impedance has not been reported yet. Summary of the invention
- the technical problem to be solved by the present invention is to provide an impedance single-phase high voltage test transformer.
- the technical solution adopted by the present invention is:
- the single-phase high-voltage test transformer of the invention adopts a two-column structure.
- the cores of the two columns are respectively provided with a low-voltage coil and a high-voltage coil from the inner casing, and the two-column high-voltage coils are connected in series, and the first ends of the high-voltage windings are respectively led out from the oil tank; They are taken out from the fuel tank separately, and the two sets of low-pressure outlets are connected in series or in parallel outside the fuel tank.
- the high-voltage coil adopts a tangled continuous structure, and the low-voltage coil adopts a spiral structure; the high-voltage coil and the low-voltage coil are all wound by a single paper-clad flat copper wire; the high-voltage coil end is provided with an electrostatic plate;
- the height of each column coil in the column structure is the same; the outer core of the iron core column is provided with a grounding ground screen; the screen between the high voltage coil and the low voltage coil is arranged with a coil; the first end of the high voltage coil is bent in the direction of the long axis of the oil tank, and the head is turned Insulation protection; fuel tank protection cardboard on the inside of the fuel tank; voltage transformer on the input end of the low voltage coil.
- the invention is a design scheme of a high-voltage test transformer. By reasonably selecting a core diameter and a structure in which two columns of a high-voltage coil are connected in series, the technical problem of high voltage and low impedance is mainly solved, and can be widely applied to an ultra-high voltage test circuit, The advantage of low impedance drop of the transformer.
- FIG. 1 is a schematic structural view of a single-phase high-voltage test transformer of the present invention
- FIG. 2 is a top plan view showing the structure of a single-phase high voltage test transformer of the present invention.
- 1 is the core
- 2 is the high voltage coil I
- 3 is the high voltage coil II
- 4 is the high voltage coil connection line
- 5 is the high voltage first end lead line
- 6 is the high voltage end lead line
- 7 is the low voltage lead line
- 8 is Voltage transformer
- 9 is the fuel tank
- 10 is the fuel tank protection cardboard
- 1 1 is the screen between the coils I
- 12 is the low voltage coil I
- 13 is the iron core screen
- 14 is the screen between the coils II
- 15 is the low voltage coil II
- 16 It is an electrostatic board. detailed description
- the single-phase high-voltage test transformer of the present invention adopts a two-column structure, and the iron cores 3 of the two columns are respectively provided with a low-voltage coil and a high-voltage coil from the inner casing, and the two-column high-voltage coils are connected in series, and the first ends of the high-voltage windings are respectively
- the oil tank 9 is taken out; the two column low voltage windings are respectively led out from the oil tank, and the two low pressure outlets are connected in series or in parallel outside the oil tank 9 to test two different voltages of the high voltage side of the transformer.
- the high-voltage coil adopts a tangled continuous structure to eliminate the damage caused by the overvoltage generated by the flashover of the external sample to the high-voltage winding insulation.
- the low-voltage coil is used, so it has a strong short-circuit-resistant spiral structure; the high-voltage coil and the low-voltage coil are both It is made of a single paper wrapped flat copper wire; the height of each coil is the same in the two-column structure; the high-voltage coil is equipped with an electrostatic plate 16 at the end to even the electric field at the end of the coil; the ground core is equipped with a grounding screen 13 Between the high-voltage coil and the low-voltage coil, a screen I 11 between the coils and a screen II 14 between the coils are arranged; the head end of the high-voltage coil is bent in the long axis direction of the oil tank 9, and the outlet is provided with insulation protection; the fuel tank is provided with a fuel tank protection cardboard inside. 10;
- the low voltage coil input terminal is provided with
- the parameters of the single-phase high-voltage test transformer are as follows:
- the problem that needs to be solved is the problem that the transformer impedance is too small, which is also the main reason for negating the test transformer required to design such parameters in a cascade structure.
- the iron core 1 is a mouth-shaped iron core, so that the high-voltage head end lead wire 5 is out of the longitudinal direction of the fuel tank 9.
- the lower magnetic flux density is selected, and the core puller, the core clamp and the foot are used to ensure the clamping of the core 1, the mechanical strength of the body hoisting, pressing and short-circuiting.
- the high voltage coil is the middle incoming line
- the high voltage coil 12 is equal to the low voltage coil I 12
- the high voltage coil ⁇ 3 is equal to the low voltage coil II 15
- the internal ampere distribution of the high and low voltage coils is balanced to enhance the short circuit resistance of the transformer.
- the high voltage coil 1 2 is connected in series with the high voltage coil ⁇ 3 to increase the total number of turns in the high voltage winding.
- the high voltage coil 1 2 has the same number of turns as the high voltage coil ⁇ 3 .
- the end of the high voltage coil 12 is connected to the head end of the high voltage coil ⁇ 3 , and the end of the high voltage coil I 2 and the head end of the high voltage coil I 3 and the connection voltage thereof are 400 kV, and good insulation treatment is required to ensure the grounding insulation.
- the high-voltage first-end lead-out line of the high-voltage coil 1 2 has an operating voltage of 800 kV, and the insulation level is higher than the connection between the coils.
- the high-voltage coil II 3 has a low level of insulation to the ground and can be drawn out of the tank 9 after simple insulation treatment.
- the low voltage coil I 12 and the low voltage coil II 15 are respectively led out of the oil tank 9, and the user can be outside the fuel tank 9 as needed. Wire in series or in parallel.
- the voltage is 10 kV
- the core flux density is the rated magnetic flux density.
- the high side output voltage is 800KV.
- the pressure is 10 kV
- the core flux density is half of the rated magnetic flux density.
- the high-voltage side output voltage is a two-column core 1 with a core ground screen 13, a high-voltage coil I 2 and a low-voltage coil I 12 are arranged between the coils, and a coil between the high-voltage coil II 3 and the low-voltage coil II 15 is arranged between the coils.
- Ground screen II 14 to prevent the transmission of overvoltage between the coils.
- the fuel tank 9 is semi-circular on the side of the high-voltage head end lead-out line 5, so that the high-voltage head end lead-out line 5 region has a relatively uniform electric field.
- the fuel tank 9 is equipped with a fuel tank protection cardboard 10 as insulation protection.
- the external voltage transformer 8 is used for measuring a low voltage voltage with a transformation ratio of 10000V/100V, and the primary side of the voltage transformer 8 is connected to the first end of the low voltage coil I 12 and the end of the low voltage coil II 15 , so that the low voltage side In series or in parallel, the voltage transformer 8 outputs 100V.
- the invention is applied to the outdoor, the outer shell is an iron shell, and the two-column single-phase oil immersion type meets the requirements of a test transformer with small capacity, low impedance and high voltage.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
Description
一种单相高压试验变压器 技术领域 Single-phase high-voltage test transformer
本发明涉及变压器技术领域， 具体的说是一种单相高压试验变压器。 背景技术 The invention relates to the technical field of transformers, in particular to a single-phase high-voltage test transformer. Background technique
试验变压器是变压器试验设备的重要组成部分， 当电压等级要求较高时， 通常将几台试验变压器用串级联结方式联结起来使用。 这样就形成了串级试 验变压器。 但串级式试验变压器的阻抗值较大， 通常在 16%左右， 目前满足 高电压且低阻抗的串级式试验变压器尚未见报道。 发明内容 The test transformer is an important part of the transformer test equipment. When the voltage level is required to be high, several test transformers are usually connected by cascade connection. This forms a cascade test transformer. However, the impedance of the cascade test transformer is large, usually around 16%. The cascade test transformer that meets the high voltage and low impedance has not been reported yet. Summary of the invention
针对现有技术中存在的串级式试验变压器的阻抗值较大等不足之处， 本发明 要解决的技术问题是提供一种阻抗的单相高压试验变压器。 In view of the insufficiency of the impedance value of the cascade test transformer existing in the prior art, the technical problem to be solved by the present invention is to provide an impedance single-phase high voltage test transformer.
为解决上述技术问题， 本发明采用的技术方案是： In order to solve the above technical problems, the technical solution adopted by the present invention is:
本发明一种单相高压试验变压器采用两柱结构，两柱的铁心上分别由内向外套设 低压线圈、 高压线圈， 两柱高压线圈串联接线， 高压绕组首末端分别从油箱引出； 两 柱低压绕组分别从油箱引出， 两组低压出头在油箱外部串联连接或并联连接。 The single-phase high-voltage test transformer of the invention adopts a two-column structure. The cores of the two columns are respectively provided with a low-voltage coil and a high-voltage coil from the inner casing, and the two-column high-voltage coils are connected in series, and the first ends of the high-voltage windings are respectively led out from the oil tank; They are taken out from the fuel tank separately, and the two sets of low-pressure outlets are connected in series or in parallel outside the fuel tank.
所述高压线圈采用纠结连续式结构， 低压线圈采用螺旋式结构； 高压线圈及低压 线圈均用单根纸包扁铜线绕制而成； 所述高压线圈端部装有静电板； 所述两柱结构中 每柱线圈高度相同； 所述铁心心柱外部装有接地地屏； 所述高压线圈与低压线圈间装 有线圈间地屏； 高压线圈首端在油箱长轴方向弯曲出头， 出头处设有绝缘保护； 油箱 内侧设有油箱保护纸板； 低压线圈输入端设有电压互感器。 The high-voltage coil adopts a tangled continuous structure, and the low-voltage coil adopts a spiral structure; the high-voltage coil and the low-voltage coil are all wound by a single paper-clad flat copper wire; the high-voltage coil end is provided with an electrostatic plate; The height of each column coil in the column structure is the same; the outer core of the iron core column is provided with a grounding ground screen; the screen between the high voltage coil and the low voltage coil is arranged with a coil; the first end of the high voltage coil is bent in the direction of the long axis of the oil tank, and the head is turned Insulation protection; fuel tank protection cardboard on the inside of the fuel tank; voltage transformer on the input end of the low voltage coil.
本发明具有以下有益效果及优点： The invention has the following beneficial effects and advantages:
1. 本发明为高电压的试验变压器的设计方案， 通过合理选取铁心直径， 高压线 圈两柱串联的结构， 主要解决电压高和阻抗小的技术问题， 能够广泛应用于特高压试 验线路中， 具有变压器阻抗压降小的优点。 附图说明 1. The invention is a design scheme of a high-voltage test transformer. By reasonably selecting a core diameter and a structure in which two columns of a high-voltage coil are connected in series, the technical problem of high voltage and low impedance is mainly solved, and can be widely applied to an ultra-high voltage test circuit, The advantage of low impedance drop of the transformer. DRAWINGS
图 1为本发明单相高压试验变压器结构示意图； 1 is a schematic structural view of a single-phase high-voltage test transformer of the present invention;
图 2为本发明单相高压试验变压器结构俯视图。 2 is a top plan view showing the structure of a single-phase high voltage test transformer of the present invention.
图中： 1为铁心， 2为高压线圈 I， 3为高压线圈 II， 4为高压线圈间连线， 5为高压首端引出线； 6为高压末端引出线， 7为低压引出线， 8为电压互感 器， 9为油箱， 10为油箱保护纸板， 1 1 为线圈间地屏 I， 12为低压线圈 I， 13为铁心地屏， 14为线圈间地屏 II， 15为 低压线圈 II， 16为静电板。 具体实施方式 In the figure: 1 is the core, 2 is the high voltage coil I, 3 is the high voltage coil II, 4 is the high voltage coil connection line, 5 is the high voltage first end lead line; 6 is the high voltage end lead line, 7 is the low voltage lead line, 8 is Voltage transformer, 9 is the fuel tank, 10 is the fuel tank protection cardboard, 1 1 is the screen between the coils I, 12 is the low voltage coil I, 13 is the iron core screen, 14 is the screen between the coils II, 15 is the low voltage coil II, 16 It is an electrostatic board. detailed description
如图 1、 2所示， 本发明单相高压试验变压器采用两柱结构， 两柱的铁心 3上分 别由内向外套设低压线圈、 高压线圈， 两柱高压线圈串联接线， 高压绕组首末端分别 从油箱 9引出； 两柱低压绕组分别从油箱引出， 两组低压出头在油箱 9外部串联连接 或并联连接， 以便试验变压器高压侧输出两种不同的电压。高压线圈采用纠结连续式 结构， 以消除外部试品发生闪络时产生的过电压对高压绕组绝缘的危害，低压线圈采 用， 因而具有较强的抗短路能力螺旋式结构； 高压线圈及低压线圈均用单根纸包扁铜 线绕制而成； 两柱结构中每柱线圈高度相同； 高压线圈端部装有静电板 16， 以均匀 线圈端部电场； 铁心心柱外部装有接地地屏 13; 高压线圈与低压线圈间装有线圈间 地屏 I 11和线圈间地屏 II 14; 高压线圈首端在油箱 9长轴方向弯曲出头， 出头处设 有绝缘保护； 油箱内侧设有油箱保护纸板 10; 低压线圈输入端设有电压互感器 8， 用 于电压测量。 As shown in FIG. 1 and FIG. 2, the single-phase high-voltage test transformer of the present invention adopts a two-column structure, and the iron cores 3 of the two columns are respectively provided with a low-voltage coil and a high-voltage coil from the inner casing, and the two-column high-voltage coils are connected in series, and the first ends of the high-voltage windings are respectively The oil tank 9 is taken out; the two column low voltage windings are respectively led out from the oil tank, and the two low pressure outlets are connected in series or in parallel outside the oil tank 9 to test two different voltages of the high voltage side of the transformer. The high-voltage coil adopts a tangled continuous structure to eliminate the damage caused by the overvoltage generated by the flashover of the external sample to the high-voltage winding insulation. The low-voltage coil is used, so it has a strong short-circuit-resistant spiral structure; the high-voltage coil and the low-voltage coil are both It is made of a single paper wrapped flat copper wire; the height of each coil is the same in the two-column structure; the high-voltage coil is equipped with an electrostatic plate 16 at the end to even the electric field at the end of the coil; the ground core is equipped with a grounding screen 13 Between the high-voltage coil and the low-voltage coil, a screen I 11 between the coils and a screen II 14 between the coils are arranged; the head end of the high-voltage coil is bent in the long axis direction of the oil tank 9, and the outlet is provided with insulation protection; the fuel tank is provided with a fuel tank protection cardboard inside. 10; The low voltage coil input terminal is provided with a voltage transformer 8 for voltage measurement.
本实施例中， 单相高压试验变压器参数如下： In this embodiment, the parameters of the single-phase high-voltage test transformer are as follows:
容量 4800kVA;高压绕组电压：低压绕组并联时为 800kV，低压绕组串联时 400kV; 低压绕组电压： 10kV;高压绕组电流：低压绕组并联时为 6A，低压绕组串联时为 12A; 阻抗电压： 低压绕组并联时为 0.5%， 低压绕组串联时为 2%; 允许运行时间： 允许连 续运行 3小时； 耐短路能力： 能承受 60A的连续闪络； 试验变压器电阻与电抗的比 值大于 0.1 ; Capacity 4800kVA; high voltage winding voltage: 800kV when the low voltage winding is connected in parallel, 400kV when the low voltage winding is connected in series; low voltage winding voltage: 10kV; high voltage winding current: 6A when the low voltage winding is connected in parallel, and 12A when the low voltage winding is connected in series; Impedance voltage: low voltage winding in parallel Time is 0.5%, low voltage winding is 2% when connected in series; Allowable running time: Allow continuous operation for 3 hours; Short circuit resistance: Can withstand 60A continuous flashover; Test transformer resistance and reactance ratio is greater than 0.1;
上述试验变压器参数中， 除工作电压较高外， 需要重点解决的问题是变压器阻抗 过小的问题，这也是否定了采用串级式结构设计这种参数要求的试验变压器的主要原 因。 Among the above test transformer parameters, except for the higher operating voltage, the problem that needs to be solved is the problem that the transformer impedance is too small, which is also the main reason for negating the test transformer required to design such parameters in a cascade structure.
铁心 1为口字型铁心， 以便高压首端引出线 5在油箱 9长轴方向出线。选取较低 的磁通密度， 采用铁心拉板， 铁心夹件和垫脚来保证铁心 1的夹紧， 器身吊起， 压紧 及短路状态下的机械强度。 The iron core 1 is a mouth-shaped iron core, so that the high-voltage head end lead wire 5 is out of the longitudinal direction of the fuel tank 9. The lower magnetic flux density is selected, and the core puller, the core clamp and the foot are used to ensure the clamping of the core 1, the mechanical strength of the body hoisting, pressing and short-circuiting.
高压线圈为中部进线， 高压线圈 1 2与低压线圈 I 12高度相等， 高压线圈 Π 3与 低压线圈 II 15 高度相等， 且高低压线圈内部安匝分布保持平衡， 以加强变压器的抗 短路能力。选取导线线规时， 要保证变压器的电阻值满足电阻与电抗的比值大于 0.1。 The high voltage coil is the middle incoming line, the high voltage coil 12 is equal to the low voltage coil I 12 , the high voltage coil Π 3 is equal to the low voltage coil II 15 , and the internal ampere distribution of the high and low voltage coils is balanced to enhance the short circuit resistance of the transformer. When selecting a wire gauge, ensure that the resistance of the transformer meets the ratio of resistance to reactance greater than 0.1.
高压线圈 1 2 与高压线圈 Π 3 串联接线， 增加高压绕组的总匝数。 高压线圈 1 2 与高压线圈 Π 3 的匝数相同。 高压线圈 1 2的末端与高压线圈 Π 3 的首端相连， 高压 线圈 I 2的末端与高压线圈 I 3的首端及其连线工作电压为 400kV， 需良好的绝缘处 理来确保其对地的绝缘。 高压线圈 1 2的高压首端引出线工作电压为 800kV， 绝缘水 平高于线圈间连线。 高压线圈 II 3末端对地绝缘水平低， 可经简单绝缘处理后引出油 箱 9。 The high voltage coil 1 2 is connected in series with the high voltage coil Π 3 to increase the total number of turns in the high voltage winding. The high voltage coil 1 2 has the same number of turns as the high voltage coil Π 3 . The end of the high voltage coil 12 is connected to the head end of the high voltage coil Π 3 , and the end of the high voltage coil I 2 and the head end of the high voltage coil I 3 and the connection voltage thereof are 400 kV, and good insulation treatment is required to ensure the grounding insulation. The high-voltage first-end lead-out line of the high-voltage coil 1 2 has an operating voltage of 800 kV, and the insulation level is higher than the connection between the coils. The high-voltage coil II 3 has a low level of insulation to the ground and can be drawn out of the tank 9 after simple insulation treatment.
低压线圈 I 12与低压线圈 II 15分别引出油箱 9， 用户可根据需要在油箱 9外部 进行串联或并联接线。低压线圈 I 12与低压线圈 II 15并联接线时， 加压 10kV， 铁心 磁通密度为额定磁通密度。高压侧输出电压为 800KV。低压线圈 I 12与低压线圈 II 15 串联接线时， 加压 10kV， 铁心磁通密度为额定磁通密度的一半。 高压侧输出电压为 两柱铁心 1外装有铁心地屏 13， 高压线圈 I 2与低压线圈 I 12之间装有线圈间 地屏 I 11， 高压线圈 II 3与低压线圈 II 15间装有线圈间地屏 II 14， 以防止线圈间过电 压的传递。 The low voltage coil I 12 and the low voltage coil II 15 are respectively led out of the oil tank 9, and the user can be outside the fuel tank 9 as needed. Wire in series or in parallel. When the low voltage coil I 12 is connected in parallel with the low voltage coil II 15, the voltage is 10 kV, and the core flux density is the rated magnetic flux density. The high side output voltage is 800KV. When the low voltage coil I 12 is connected in series with the low voltage coil II 15 , the pressure is 10 kV, and the core flux density is half of the rated magnetic flux density. The high-voltage side output voltage is a two-column core 1 with a core ground screen 13, a high-voltage coil I 2 and a low-voltage coil I 12 are arranged between the coils, and a coil between the high-voltage coil II 3 and the low-voltage coil II 15 is arranged between the coils. Ground screen II 14, to prevent the transmission of overvoltage between the coils.
油箱 9在高压首端引出线 5侧为半圆形，使高压首端引出线 5区域具有较均匀电 场。 在高电压区域内， 油箱 9装有油箱保护纸板 10做为绝缘保护。 The fuel tank 9 is semi-circular on the side of the high-voltage head end lead-out line 5, so that the high-voltage head end lead-out line 5 region has a relatively uniform electric field. In the high voltage region, the fuel tank 9 is equipped with a fuel tank protection cardboard 10 as insulation protection.
外置式电压互感器 8用于测量低压电压， 其变比为 10000V/100V, 将电压互感器 8的一次侧接在低压线圈 I 12的首端和低压线圈 II 15 的末端， 这样， 无论低压侧串 联还是并联， 电压互感器 8均输出 100V。 The external voltage transformer 8 is used for measuring a low voltage voltage with a transformation ratio of 10000V/100V, and the primary side of the voltage transformer 8 is connected to the first end of the low voltage coil I 12 and the end of the low voltage coil II 15 , so that the low voltage side In series or in parallel, the voltage transformer 8 outputs 100V.
本发明应用于户外， 外壳为铁壳， 两柱单相油浸式， 满足小容量、 低阻抗、 高电 压的试验变压器要求。 The invention is applied to the outdoor, the outer shell is an iron shell, and the two-column single-phase oil immersion type meets the requirements of a test transformer with small capacity, low impedance and high voltage.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105876470A CN102568791A (en) | 2010-12-14 | 2010-12-14 | Single-phase high-voltage testing transformer |
| CN201010587647.0 | 2010-12-14 |
Publications (1)
| Publication Number | Publication Date |
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| WO2012079261A1 true WO2012079261A1 (en) | 2012-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2010/080085 Ceased WO2012079261A1 (en) | 2010-12-14 | 2010-12-22 | Single-phase high-voltage testing transformer |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102568791A (en) |
| WO (1) | WO2012079261A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485212A (en) * | 2014-11-28 | 2015-04-01 | 辽宁拓新电力电子有限公司 | Low-excitation-impedance single-phase transformer |
| CN105161273B (en) * | 2015-10-22 | 2017-06-27 | 浙江江山变压器股份有限公司 | A kind of single-phase transformer of many combined transformations of connection in series-parallel winding |
| CN114093640A (en) * | 2021-11-25 | 2022-02-25 | 吴江变压器有限公司 | 35kV dry-type single-phase combined test transformer |
| CN118711959A (en) * | 2024-07-03 | 2024-09-27 | 山东泰开变压器有限公司 | An isolation test transformer suitable for multi-frequency power supply, use method, terminal and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200947381Y (en) * | 2006-08-29 | 2007-09-12 | 山东达驰电气股份有限公司 | Single-phase amorphous iron-core transformer |
| CN101236824A (en) * | 2007-12-20 | 2008-08-06 | 卧龙电气集团股份有限公司 | Body structure of single-phase traction transformer |
| CN201122499Y (en) * | 2007-11-23 | 2008-09-24 | 上海市电力公司 | A capacity-adjustable dry-type transformer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10106858A (en) * | 1996-09-27 | 1998-04-24 | Toshiba Corp | Transformer |
| CN201207329Y (en) * | 2008-05-20 | 2009-03-11 | 江苏华鹏变压器有限公司 | Earthing construction for reactor discus |
| CN201425875Y (en) * | 2009-06-05 | 2010-03-17 | 山东达驰电气有限公司 | Electric shock-preventing transformer |
| CN201562575U (en) * | 2009-11-03 | 2010-08-25 | 保定天威集团有限公司 | Single-phase traction transformer for high-speed passenger special line |
-
2010
- 2010-12-14 CN CN2010105876470A patent/CN102568791A/en active Pending
- 2010-12-22 WO PCT/CN2010/080085 patent/WO2012079261A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200947381Y (en) * | 2006-08-29 | 2007-09-12 | 山东达驰电气股份有限公司 | Single-phase amorphous iron-core transformer |
| CN201122499Y (en) * | 2007-11-23 | 2008-09-24 | 上海市电力公司 | A capacity-adjustable dry-type transformer |
| CN101236824A (en) * | 2007-12-20 | 2008-08-06 | 卧龙电气集团股份有限公司 | Body structure of single-phase traction transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102568791A (en) | 2012-07-11 |
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