CN207301231U - Portable mobile wireless current transformer polarity test device - Google Patents
Portable mobile wireless current transformer polarity test device Download PDFInfo
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- CN207301231U CN207301231U CN201721472241.1U CN201721472241U CN207301231U CN 207301231 U CN207301231 U CN 207301231U CN 201721472241 U CN201721472241 U CN 201721472241U CN 207301231 U CN207301231 U CN 207301231U
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Abstract
The utility model discloses a kind of portable mobile wireless current transformer polarity test device, including control output device and display output device；The control output device includes wireless remote control receiving module, power module and the primary voltage output port for being connected with primary side and primary side N line end mouths；The display output device includes individual-phase control button, wireless remote control transmitting module, test result display module and the secondary current input port for being connected with secondary side and secondary side N line end mouths；The input terminal of the output terminal connection wireless remote control transmitting module of individual-phase control button, the output terminal of wireless remote control transmitting module connect the input terminal of wireless remote control receiving module by wireless transmission signal.The utility model can realize multiphase test wiring at the same time, controlled, improved work efficiency by remote control point-touch switch；Save in experiment and exchange link, increase the accuracy of result of the test.
Description
Technical Field
The utility model belongs to the technical field of the current transformer test, concretely relates to current transformer polarity testing arrangement.
Background
A Current Transformer (CT) converts a large primary Current into a small secondary Current according to the electromagnetic induction principle, and is generally composed of a closed core and a winding. The secondary side open circuit can generate high voltage, threatens the personal safety and the equipment safety, and strictly forbids the open circuit of the secondary circuit of the current transformer in the operation process.
In the process of acceptance inspection of a newly-built transformer substation and replacement of a CT of an old transformer substation, a CT polarity test is very important and delicate work, a polarity error affects the results of measurement and metering, and a protection misoperation is caused, particularly for main transformer protection, bus protection and over 110kV line protection, the protection misoperation is caused in the power transmission process due to the CT polarity error for many times in a system, and an unnecessary power tripping event is caused.
The currently widely adopted method is as follows: the correctness of the CT polarity is determined by utilizing the point contact type applied voltage of the storage battery and the deflection condition of a pointer of the pointer type multimeter. Although some existing CT test instruments have a polarity test function, the use effect is not ideal, wiring is complex, errors exist, and a traditional storage battery point contact type test method is often adopted in actual work.
Although the traditional test method has high accuracy, the traditional test method has many defects, such as: the working efficiency is low, and the requirements of technical improvement work with large workload and short power failure time cannot be met; two or more persons are needed to complete the operation, and more manpower is consumed; staff need communicate the cooperation through shouting, mobile communication or intercom between, make mistakes easily in the test process, this is also one of the important reasons that causes CT polarity mistake.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned problem among the prior art, provide a convenient to use, easy operation's portable wireless current transformer polarity testing arrangement, can realize heterogeneous test wiring simultaneously, control through remote control point contact switch, improved work efficiency.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
the portable wireless current transformer polarity testing device comprises a control output device and a display output device; wherein,
the control output device comprises a wireless remote control receiving module, a power supply module, a primary voltage output port and a primary side N line port, wherein the primary voltage output port and the primary side N line port are used for being connected with a primary side;
the display output device comprises a split-phase control button, a wireless remote control transmitting module, a test result display module, a secondary current input port and a secondary side N-line port, wherein the secondary current input port and the secondary side N-line port are used for being connected with the secondary side;
the output end of the split-phase control button is connected with the input end of the wireless remote control transmitting module, and the output end of the wireless remote control transmitting module is connected with the input end of the wireless remote control receiving module through a wireless transmission signal; the output end of the wireless remote control receiving module, the power supply module, the primary voltage output port and the primary side N line port are connected in series; the test result display module, the secondary current input port and the secondary side N line port are connected in series.
The primary voltage output port comprises three-phase output ports which are correspondingly connected with the primary side three phases respectively; the secondary current input port comprises a three-phase input port which is correspondingly connected with the secondary side three-phase input port respectively; the split-phase control button is divided into three control output buttons respectively corresponding to the three phases.
The wireless remote control receiving module comprises a wireless receiving antenna and a point contact switch, and the wireless receiving antenna is coupled with the point contact switch; the wireless receiving antenna is wirelessly connected with the wireless remote control transmitting module; the point contact switch, the power supply module, the primary voltage output port and the primary side N line port are connected in series.
The power module comprises a rectifying and filtering circuit, wherein the input end of the rectifying and filtering circuit is connected with an alternating current power supply, and the positive and negative output ends of the rectifying and filtering circuit are respectively connected with a primary voltage output port and a primary side N line port.
The test result display module is a pointer multimeter.
The control output device also comprises a first shell, wherein a wireless remote control receiving module and a power supply module are arranged in the first shell, and a primary voltage output port and a primary side N-line port are arranged outside the first shell; the display output device further comprises a second shell, and a split-phase control button, a wireless remote control transmitting module, a test result display module, a secondary current input port and a secondary side N line port are mounted on the second shell.
Compared with the prior art, the utility model has the advantages that:
the utility model discloses a portable wireless current transformer polarity testing device, through adopting wireless remote control receiving module and wireless remote control receiving module, can remote control locate the point-contact switch break-make of primary side to control the break-make of primary side, show the test result of CT polarity again from the test result display module, only one person can accomplish the whole test process, has saved the interchange link in the experiment simultaneously; the device is provided with a three-phase primary voltage output port and a secondary current input port corresponding to the three-phase primary voltage output port, and can perform multi-phase test and wiring simultaneously, so that the working efficiency is greatly improved; by adopting the high-precision pointer type universal meter, the accuracy of a test result is improved, and the protection misoperation event caused by the polarity error of the current transformer can be effectively reduced; the power module adopts a rectification filter circuit to rectify a 220V alternating current power supply to a 12V direct current power supply for output, replaces the traditional storage battery test method, is stable and reliable, and improves the test accuracy. The device is suitable for polarity test of various indoor and outdoor current transformers.
Drawings
Fig. 1 is a schematic structural diagram of a portable wireless current transformer polarity testing device.
Reference numerals: 1-control output device, 11-first housing, 12-wireless remote control receiving module, 121-wireless receiving antenna, 122-point contact switch, 13-power module, 14-primary voltage output port, 141-A phase output port, 142-B phase output port, 143-C phase output port, 15-primary side N line port, 2-display output device, 21-second housing, 22-split phase control button, 23-wireless remote control transmitting module, 24-test result display module, 25-secondary current input port, 251-A phase input port, 252-B phase input port, 253-C phase input port, 26-secondary side N line port, 3-primary side, 4-secondary side.
Detailed Description
The technical solution of the present invention is further described in non-limiting detail with reference to the following examples and the accompanying drawings.
As shown in fig. 1, the portable wireless current transformer polarity testing device comprises a control output device 1 and a display output device 2; wherein,
the control output device 1 includes a first housing 11, a wireless remote control receiving module 12 installed in the first housing 11, a power supply module 13, and a primary voltage output port 14 and a primary N-line port 15 installed outside the first housing for connection with the primary side 3.
The display output device 2 comprises a second shell 21, a split-phase control button 22 mounted on the second shell, a wireless remote control transmitting module 23, a test result display module 24, a secondary current input port 25 for connecting with the secondary side 4, and a secondary side N line port 26.
The output end of the split-phase control button 22 is connected with the input end of the wireless remote control transmitting module 23, and the output end of the wireless remote control transmitting module 23 is connected with the input end of the wireless remote control receiving module 12 through a wireless transmission signal; the output end of the wireless remote control receiving module 12, the power supply module 13, the primary voltage output port 14 and the primary side N line port 15 are connected in series; the test result display module 24, the secondary current input port 25 and the secondary side N-line port 26 are connected in series.
The primary voltage output port 14 includes an a-phase output port 141, a B-phase output port 142, and a C-phase output port 143, which are connected to the a-phase, B-phase, and C-phase of the primary side 3, respectively.
Secondary current input port 25 includes an a-phase input port 251, a B-phase input port 252, and a C-phase input port 253 that are connected to a-phase, B-phase, and C-phase of secondary side 4, respectively.
The split-phase control button 22 is divided into three control output buttons corresponding to the phases a, B, and C, respectively.
The wireless remote control receiving module 12 comprises a wireless receiving antenna 121 and a point-contact switch 122; the wireless receiving antenna 121 is respectively coupled with the point-contact switch 122 and the power module 13; the wireless receiving antenna 121 is wirelessly connected with the wireless remote control transmitting module 23; the point-contact switch 122, the power module 13, the primary voltage output port 14, and the primary N-line port 15 are connected in series.
The power module 13 comprises a rectifying and filtering circuit, the input end of the rectifying and filtering circuit is connected with an alternating current power supply, and the positive output end of the rectifying and filtering circuit is respectively connected with an A-phase output port 141, a B-phase output port 142 and a C-phase output port 143; the negative output terminal of the rectifying filter circuit is connected to the primary side N-line port 15 through the point-contact switch 122.
The test result display module 24 is a high-precision pointer multimeter.
The parameters of the wireless remote control receiving module are as follows:
working voltage: 12V;
contact capacity: less than or equal to 8A;
an output mode: outputting a switching signal;
load power: inductive 80W, resistive 40W;
working temperature: -20 ℃ to 70 ℃;
reception sensitivity: -114 dBm;
the working frequency is as follows: 315 MHz.
The parameters of the wireless remote control transmitting module are as follows:
working voltage: 12V;
oscillating resistance: 450M;
remote control frequency: 315 MHz;
remote control distance: not less than 800 meters.
The utility model discloses a portable wireless current transformer polarity testing arrangement's application method:
when the portable wireless current transformer polarity testing device is used for CT polarity testing, the control output device and the display output device are connected with an electric wire according to the connection mode of figure 1; the method comprises the steps that an A-phase control output button is pressed to send an instruction signal to a wireless remote control transmitting module, the wireless remote control transmitting module transmits the instruction signal to a wireless remote control receiving module through a wireless transmission signal, a wireless receiving antenna of the wireless remote control receiving module receives the instruction signal, and a point contact switch is controlled to conduct an A-phase loop on a primary side, so that a-phase loop on a secondary side generates current, and the polarity of the A-phase of the CT is determined through the pointer deflection condition of a pointer type multimeter. Similarly, the polarities of the B-phase and the C-phase can be judged by pressing the B-phase control output button and the C-phase control output button, respectively.
The device can realize one-time wiring of three-phase CT, and can finish test work by only one person, thereby greatly improving the working efficiency; meanwhile, an alternating current link in the traditional method is omitted, the power module adopts a rectification filter circuit to rectify a 220V alternating current power supply to a 12V direct current power supply for output, the traditional storage battery testing method is replaced, stability and reliability are achieved, and testing accuracy is improved.
Claims (6)
1. Portable wireless current transformer polarity testing arrangement, its characterized in that: comprises a control output device and a display output device; wherein,
the control output device comprises a wireless remote control receiving module, a power supply module, a primary voltage output port and a primary side N line port, wherein the primary voltage output port and the primary side N line port are used for being connected with a primary side;
the display output device comprises a split-phase control button, a wireless remote control transmitting module, a test result display module, a secondary current input port and a secondary side N-line port, wherein the secondary current input port and the secondary side N-line port are used for being connected with the secondary side;
the output end of the split-phase control button is connected with the input end of the wireless remote control transmitting module, and the output end of the wireless remote control transmitting module is connected with the input end of the wireless remote control receiving module through a wireless transmission signal; the output end of the wireless remote control receiving module, the power supply module, the primary voltage output port and the primary side N line port are connected in series; the test result display module, the secondary current input port and the secondary side N line port are connected in series.
2. The portable wireless current transformer polarity testing device of claim 1, wherein: the primary voltage output port comprises three-phase output ports which are correspondingly connected with the primary side three phases respectively; the secondary current input port comprises a three-phase input port which is correspondingly connected with the secondary side three-phase input port respectively; the split-phase control button is divided into three control output buttons respectively corresponding to the three phases.
3. The portable wireless current transformer polarity testing device of claim 1, wherein: the wireless remote control receiving module comprises a wireless receiving antenna and a point-contact switch, and the wireless receiving antenna is coupled with the point-contact switch; the wireless receiving antenna is wirelessly connected with the wireless remote control transmitting module; the point contact switch, the power supply module, the primary voltage output port and the primary side N line port are connected in series.
4. The portable wireless current transformer polarity testing device of claim 1, wherein: the power module comprises a rectifying and filtering circuit, the input end of the rectifying and filtering circuit is connected with an alternating current power supply, and the positive and negative output ends of the rectifying and filtering circuit are respectively connected with a primary voltage output port and a primary side N line port.
5. The portable wireless current transformer polarity testing device of claim 1, wherein: the test result display module is a pointer type universal meter.
6. The portable wireless current transformer polarity testing device of claim 1, wherein: the control output device also comprises a first shell, a wireless remote control receiving module and a power supply module are arranged in the first shell, and a primary voltage output port and a primary side N-line port are arranged outside the first shell; the display output device further comprises a second shell, and a split-phase control button, a wireless remote control transmitting module, a test result display module, a secondary current input port and a secondary side N line port are mounted on the second shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721472241.1U CN207301231U (en) | 2017-11-07 | 2017-11-07 | Portable mobile wireless current transformer polarity test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721472241.1U CN207301231U (en) | 2017-11-07 | 2017-11-07 | Portable mobile wireless current transformer polarity test device |
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| CN207301231U true CN207301231U (en) | 2018-05-01 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444611A (en) * | 2018-12-21 | 2019-03-08 | 益和电气集团股份有限公司 | A kind of remote-controlled switchgear AC and DC pressure regulation instruction carriage |
| CN109752628A (en) * | 2019-01-15 | 2019-05-14 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of multifunctional mutual-inductor polarity test instrument based on embedded RTU |
| CN110346713A (en) * | 2019-07-30 | 2019-10-18 | 国网浙江省电力公司宁波供电公司 | A method of temperature rise test is completed at the same time for more 10kV on-pole switch primary connections |
| CN110579676A (en) * | 2019-09-19 | 2019-12-17 | 国网辽宁省电力有限公司营口供电公司 | Automatic polarity detection device |
| CN112666502A (en) * | 2020-12-03 | 2021-04-16 | 广东电网有限责任公司中山供电局 | Hand-held type CT polarity tester device |
| CN112731218A (en) * | 2020-12-01 | 2021-04-30 | 国网宁夏电力有限公司检修公司 | Polarity testing system and method for mutual inductor |
| CN113219392A (en) * | 2021-04-30 | 2021-08-06 | 内蒙古送变电有限责任公司 | Portable chargeable formula remote control current transformer polarity tester |
| CN114675223A (en) * | 2022-02-22 | 2022-06-28 | 内蒙古送变电有限责任公司 | Portable chargeable type remote control polarity tester for current transformer |
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2017
- 2017-11-07 CN CN201721472241.1U patent/CN207301231U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444611A (en) * | 2018-12-21 | 2019-03-08 | 益和电气集团股份有限公司 | A kind of remote-controlled switchgear AC and DC pressure regulation instruction carriage |
| CN109444611B (en) * | 2018-12-21 | 2024-06-14 | 青岛益和电气集团股份有限公司 | Switch cabinet AC/DC voltage regulation test vehicle capable of being remotely controlled |
| CN109752628A (en) * | 2019-01-15 | 2019-05-14 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of multifunctional mutual-inductor polarity test instrument based on embedded RTU |
| CN109752628B (en) * | 2019-01-15 | 2024-03-19 | 国网辽宁省电力有限公司鞍山供电公司 | Multifunctional mutual inductor polarity tester based on embedded RTU |
| CN110346713A (en) * | 2019-07-30 | 2019-10-18 | 国网浙江省电力公司宁波供电公司 | A method of temperature rise test is completed at the same time for more 10kV on-pole switch primary connections |
| CN110579676A (en) * | 2019-09-19 | 2019-12-17 | 国网辽宁省电力有限公司营口供电公司 | Automatic polarity detection device |
| CN112731218A (en) * | 2020-12-01 | 2021-04-30 | 国网宁夏电力有限公司检修公司 | Polarity testing system and method for mutual inductor |
| CN112666502A (en) * | 2020-12-03 | 2021-04-16 | 广东电网有限责任公司中山供电局 | Hand-held type CT polarity tester device |
| CN113219392A (en) * | 2021-04-30 | 2021-08-06 | 内蒙古送变电有限责任公司 | Portable chargeable formula remote control current transformer polarity tester |
| CN114675223A (en) * | 2022-02-22 | 2022-06-28 | 内蒙古送变电有限责任公司 | Portable chargeable type remote control polarity tester for current transformer |
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