CN215813292U - Simple and practical field tester for transformation ratio of current transformer - Google Patents
Simple and practical field tester for transformation ratio of current transformer Download PDFInfo
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- CN215813292U CN215813292U CN202120646695.6U CN202120646695U CN215813292U CN 215813292 U CN215813292 U CN 215813292U CN 202120646695 U CN202120646695 U CN 202120646695U CN 215813292 U CN215813292 U CN 215813292U
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Abstract
The utility model relates to a simple and practical field tester for the transformation ratio of a current transformer, which comprises a mobile phone APP, a primary side clamp type ammeter and a secondary side clamp type ammeter; the primary side clamp-on ammeter is connected to the primary side of the tested current transformer, the secondary side clamp-on ammeter is connected to the secondary side of the tested current transformer, and the mobile phone APP is in communication with the primary side clamp-on ammeter and the secondary side clamp-on ammeter through Bluetooth; the utility model has small volume, light weight, convenient carrying, convenient and quick operation and safe and reliable use. The utility model has reasonable design, compact structure and convenient use.
Description
Technical Field
The utility model belongs to the technical field of testing, and particularly relates to a field tester for measuring the transformation ratio of a current transformer on line.
Background
The metering precision of the electric energy metering device directly influences the fair charging problem of an electric power system, and links for generating the metering problem mainly comprise a current transformer, an electric energy meter and wiring between the transformer and the electric energy meter; in the using process of the current transformer, phenomena of nameplate loss, malicious nameplate change, hiding of the real transformation ratio of the current transformer and the like exist; therefore, it is very necessary to design a current transformer transformation ratio field tester which is convenient, fast and safe to operate and stable in measurement.
SUMMERY OF THE UTILITY MODEL
The utility model provides a simple and practical current transformer transformation ratio field tester, which can safely, quickly, conveniently and accurately test the transformation ratio of a current transformer in online operation and is suitable for live measurement of the transformation ratio of a current transformer for high-voltage measurement and a current transformer for low-voltage measurement.
In order to solve the problems, the technical scheme adopted by the utility model is as follows:
a simple and practical current transformer transformation ratio field tester comprises a mobile phone APP, a primary side clamp type ammeter and a secondary side clamp type ammeter based on a current transformer; the mobile phone APP communicates with the primary side clamp-on ammeter and the secondary side clamp-on ammeter through Bluetooth respectively;
the primary clamp type ammeter adopts a push-up opening and closing structure, and the insulating rod is operated in a long distance; the secondary clamp-on ammeter adopts a small and exquisite sharp-nose clamp-on structure, so that the secondary line terminal of the transformer can be conveniently clamped; the mobile phone APP is controlled, Bluetooth communication is achieved, and the use is convenient; the detector has small volume, light weight, convenient carrying, convenient and quick operation, safe and reliable use, and is suitable for the transformation ratio field test of various current transformers
Once the clamp type ampere meter connects and is measured current transformer and once inclines, high low voltage current transformer all can measure, including clamp type transformer, microprocessor, LCD, battery and bluetooth module, bluetooth module and cell-phone APP communication. The primary clamp-on ammeter is operated in a long distance through the insulating rod, so that the operation beyond a safe distance is facilitated. The secondary clamp-on ammeter facilitates clamping of the secondary line terminal of the transformer.
The secondary side clamp type ampere meter connects in the measured current transformer secondary side, and high low voltage current transformer all can measure, including clamp type transformer, microprocessor, bluetooth module and battery, bluetooth module and cell-phone APP communication.
The mobile phone APP is used as a control management end of the tester to control the field test of the transformation ratio of the current transformer, so that the interface is friendly, and the operation is convenient and fast; and the mobile phone completes the basic information input, test data display and detection report generation of the tested mutual inductor. Cell-phone APP passes through bluetooth and clamp type ampere meter communication, in order to reach synchronous measurement's purpose, cell-phone APP has set up synchronous start, stop the broadcast order.
The mobile phone APP is friendly in interface and convenient to operate; the APP issues a test command to the clamp ammeter, test data of the clamp ammeter on the primary side and the secondary side are read, and the transformation ratio of the current transformer is calculated; the functions of the mobile phone are fully utilized, the functions of shooting, recording, shooting and positioning in a test site can be realized, and test data can also be uploaded to a cloud platform or other software systems.
The technical scheme is further optimized, the micro-processing is realized, MSP430F6726 is selected, the low-power-consumption design is adopted, a 2-channel 24-bit analog-to-digital converter, an 8K byte RAM, a 128K byte program memory and an I are arranged in the micro-processing, and the micro-processing system is internally provided with a 2-channel 24-bit analog-to-digital converter, an 8K byte RAM, a 128K byte program memory and an I2C interface, SPI interface, UART interface.
According to the technical scheme, the primary side clamp type ammeter has the advantages that the shielding cover is additionally arranged on the iron core of the clamp type mutual inductor, the circuit board is wrapped and shielded by the copper foil, high-voltage electromagnetic interference is reduced, and the Bluetooth module is externally connected with the antenna to improve the communication distance.
Further optimize technical scheme, secondary side clamp type ampere meter, choose for use 0.1 level 10A/10mA clamp type mutual-inductor, handle end embeds microprocessor and bluetooth module, bluetooth module and cell-phone APP intelligence interconnection.
The technical scheme is further optimized, when the mobile phone APP is tested, a broadcast command is issued firstly, the primary side clamp-type ammeter and the secondary side clamp-type ammeter are started simultaneously, and a current value starts to be measured and calculated at the same time; a measurement period (the measurement period is more than 2 seconds) can be set, and when the measurement period is up, a broadcast sending ending command stops measurement; the mobile phone APP reads the current values of the primary side and the secondary side respectively, and the transformation ratio and the display of the current transformer are calculated.
The utility model has the advantages of flexible and convenient use, stable and reliable performance, small volume, light weight and convenient carrying, and is particularly suitable for the transformer transformation ratio measurement of an outdoor high-voltage metering box; the mobile phone APP is used, the interface is friendly, the operation is convenient, the functions of mobile phone are fully utilized, the functions of test site photographing, recording, shooting and positioning can be realized, and the detection data can also be uploaded to a cloud platform or other software systems.
Drawings
FIG. 1 is a functional block diagram of the present invention.
Fig. 2 is a schematic diagram of the primary-side clamp type ammeter of the present invention.
Fig. 3 is an electrical schematic diagram of a secondary side clamp type ammeter according to the present invention.
FIG. 4 is a schematic view of a caliper structure of the present invention.
Wherein: 1. a mobile phone APP; 2. a primary clip-on ammeter; 3. a secondary clip-on ammeter; 4. a caliper body; 5. a hanging part; 6. a rope hanging part; 7. a pulling rope; 8. an outer insulating rubber sleeve; 9. a rear grab handle.
Detailed Description
Referring to fig. 1-4, a simple and practical field tester for current transformer transformation ratio of the present embodiment, referring to fig. 1, includes a mobile phone APP (1), a primary side clamp ammeter (2) and a secondary side clamp ammeter (3) based on a current transformer; the mobile phone APP (1) is communicated with the primary side clamp type ammeter (2) and the secondary side clamp type ammeter (3) through Bluetooth respectively;
as shown in fig. 2, the primary clamp ammeter (2) adopts a push-up opening and closing structure, and the secondary clamp ammeter (3) adopts a clamp structure to clamp the secondary terminal;
the primary clamp type ammeter (2) is connected to the primary side of a tested current transformer and comprises a clamp type current transformer YCQB (2.2), a microprocessor U1(2.1), a liquid crystal display LCD1(2.5), a battery BT1(2.4) and a Bluetooth module RF1(2.3), wherein the Bluetooth module RF1(2.3) is communicated with a mobile phone APP (1); the clamp type current transformer YCQB (2.2) is electrically connected with the microprocessor U1 (2.1); the microprocessor U1(2.1) is electrically connected with the liquid crystal display LCD1(2.5), the battery BT1(2.4) and the Bluetooth module RF1(2.3) respectively;
as shown in fig. 3, the secondary side clamp ammeter (3) includes a microprocessor U2 (3.1); the microprocessor U2(3.1) is electrically connected with a clamp type current transformer ECQB (3.2), a Bluetooth module RF21(3.3) and a battery BT21(3.4) respectively; the Bluetooth module BT21(3.3) is communicated with a mobile phone APP (1);
referring to fig. 2, a micro-power programmable microprocessor with model number MSP430F6726 is adopted as the microprocessor U1(2.1), serial ports RXD and TXD of the microprocessor U1(2.1) are connected with a bluetooth module RF1(2.3), and a battery BT1(2.4) is a power supply source of the primary side clamp type ammeter (2) and is a rechargeable lithium battery; primary current is input by a clamp type current transformer YCQB (2.2), is connected to an AD input channel IIN-, IIN + pin of a microprocessor U1(2.1) after being conditioned by a primary side signal conditioning circuit, and is displayed on a liquid crystal display LCD1(2.5) by the microprocessor U1(2.1) after being calculated, and is read by a mobile phone APP through a Bluetooth module RF 1;
the primary side signal conditioning circuit comprises resistors R1, R2 and R3 and capacitors C1 and C2; the resistor R1 is connected between the YCQB (2.2) and IIN + pin of the clamp type current transformer; the resistor R3 is connected between the YCQB (2.2) and IIN-pin of the clamp type current transformer; the resistor R2 is connected between the input end of the resistor R1 and the input end of the resistor R3; IIN-IIN + pins are respectively grounded through capacitors C1 and C2;
referring to fig. 3, a micro-power programmable microprocessor with model number MSP430F6726 is adopted as the microprocessor U2(3.1), serial ports RXD and TXD of the microprocessor U2(3.1) are connected with a bluetooth module RF21(3.3), a battery BT21(3.4) is a power supply source of the secondary side clamp type ammeter (3), and a rechargeable lithium battery is selected; the secondary current is input by a clamp type current transformer ECQB (3.2), and is connected to an AD input channel IIN-, IIN + pin of a microprocessor U2(3.1) after being conditioned by a secondary signal circuit, the current value is calculated by the microprocessor U2, and the mobile phone APP (1) is read through a Bluetooth module RF21 (3.3).
The secondary signal circuit has the same structure as the signal conditioning circuit at one side, and comprises resistors R41, R51 and R61 and capacitors C31 and C41;
the mobile phone APP (1) is used as a tester control management end to complete information input, test data display and detection report generation of the tested mutual inductor. Cell-phone APP (1) is through the bluetooth with correspond tong-type ampere meter communication, in order to reach synchronous measurement's purpose, cell-phone APP has set up synchronous start, stop the broadcast order.
The method comprises the following steps that a mobile phone APP (1) issues a test command to a clamp-on ammeter, test data of the clamp-on ammeter on a primary side and a secondary side are read, and a current transformer transformation ratio is calculated; the functions of the mobile phone are fully utilized, and the functions of shooting, recording, shooting and positioning in a test site can be realized.
A primary side clamp type ammeter, a shielding case is additionally arranged on an iron core of a clamp type mutual inductor, a circuit board is wrapped and shielded by copper foil, and a Bluetooth module is externally connected with an antenna;
secondary side clamp on ammeter, handle end embeds microprocessor and bluetooth module, and bluetooth module and cell-phone APP intelligence are interconnected.
The current transformer transformation ratio test operation process comprises the following steps:
the method comprises the following steps: and power switches of the primary side clamp type ammeter 2 and the secondary side clamp type ammeter 3 are opened, the primary side clamp type ammeter 2 is connected with a high-voltage insulating rod in a matching mode and is connected to an actual measurement line, and the secondary side clamp type ammeter 3 is connected to a secondary loop of the current transformer.
Step two: the field tester opens the mobile phone APP, and the mobile phone Bluetooth automatically searches for the connection equipment to prompt the connection success information.
Step three: the field tester clicks a parameter input interface of the mobile phone APP, inputs the serial number of the mutual inductor and the tester, selects a primary range and a secondary range, selects a test period, and clicks a 'transformation ratio test' button.
Step four: the mobile phone sends a broadcast starting command through Bluetooth, a test period starts timing, the primary side clamp ammeter 2 and the secondary side clamp ammeter 3 receive the starting command at the same time, and a field current value starts to be measured; when the test period is up, the control software automatically issues a broadcast stop command through Bluetooth, the primary side clamp ammeter 2 and the secondary side clamp ammeter 3 receive the stop command at the same time, and the field current measurement is stopped; cell-phone APP reads the current value of once side clamp type ampere meter 2 and secondary side clamp type ampere meter 3 in proper order through the bluetooth, calculates the current transformer transformation ratio, shows at control software's corresponding position, accomplishes the transformer transformation ratio and measures.
Step five: and automatically circulating the step four by the control software to realize the continuous measurement of the transformation ratio of the mutual inductor.
Step six: the field tester clicks the 'save' button, and the serial number of the mutual inductor, the primary current value, the secondary current value, the transformation ratio of the mutual inductor and the test time are saved in the same record.
As shown in fig. 4, the secondary clamp ammeter 3 comprises a clamp body 4 having a hanging portion 5 for a caliper at a front end of the clamp body 4; a rear grab handle 9 is arranged at the rear end of the caliper body 4; the clamp body 4 is provided with a rope hanging part 6 for connecting a traction rope 7, and the end part of the connection traction rope 7 is provided with an external insulating rubber sleeve 8 which is sleeved on the hanging part 5 when not in use and sleeved on the rear grab handle 9 when in use. Therefore, the protection of the front end at ordinary times is realized, and the insulation effect is increased when the front end is used.
The present invention has been described in sufficient detail for clarity of disclosure and is not admitted to be prior art
An example is.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the utility model. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a simple and practical's on-spot tester of current transformer transformation ratio which characterized in that: the device comprises a mobile phone APP (1), a primary side clamp-on ammeter (2) and a secondary side clamp-on ammeter (3) based on a current transformer; the mobile phone APP (1) is communicated with the primary side clamp type ammeter (2) and the secondary side clamp type ammeter (3) through Bluetooth respectively;
the primary clamp type ammeter (2) is connected to the primary side of a tested current transformer and comprises a clamp type current transformer YCQB (2.2), a microprocessor U1(2.1), a liquid crystal display LCD1(2.5), a battery BT1(2.4) and a Bluetooth module RF1(2.3), wherein the Bluetooth module RF1(2.3) is communicated with a mobile phone APP (1); the clamp type current transformer YCQB (2.2) is electrically connected with the microprocessor U1 (2.1); the microprocessor U1(2.1) is electrically connected with the liquid crystal display LCD1(2.5), the battery BT1(2.4) and the Bluetooth module RF1(2.3) respectively;
the secondary side clamp type ammeter (3) is connected to the secondary side of the tested current transformer and comprises a microprocessor U2 (3.1); the microprocessor U2(3.1) is electrically connected with a clamp type current transformer ECQB (3.2), a Bluetooth module RF2 (3.3) and a battery BT2 (3.4) respectively; the battery BT2 (3.4) communicates with the mobile phone APP (1).
2. The simple and practical current transformer transformation ratio field tester according to claim 1, is characterized in that: the primary clamp type ammeter (2) adopts a push-up opening and closing structure, and the secondary clamp type ammeter (3) adopts a clamp type structure.
3. The simple and practical current transformer transformation ratio field tester according to claim 1, is characterized in that: aiming at the primary clamp type ammeter (2), a serial port RXD and a serial port TXD of a microprocessor U1(2.1) are connected with a Bluetooth module RF1(2.3), and a battery BT1(2.4) is a power supply of the primary clamp type ammeter (2) and selects a rechargeable lithium battery; primary current is input by a clamp type current transformer YCQB (2.2), is connected to an AD input channel IIN-, IIN + pin of a microprocessor U1(2.1) after being conditioned by a signal conditioning circuit at one side, and is displayed on a liquid crystal display LCD1(2.5) by the microprocessor U1(2.1) after being calculated, and the current value or is read by a mobile phone APP through a Bluetooth module RF 1;
the one-side signal conditioning circuit comprises resistors R1, R2 and R3 and capacitors C1 and C2; the resistor R1 is connected between the YCQB (2.2) and IIN + pin of the clamp type current transformer; the resistor R3 is connected between the YCQB (2.2) and IIN-pin of the clamp type current transformer, the resistor R2 is connected between the input end of the resistor R1 and the input end of the resistor R3; IIN and IIN + pins are respectively grounded through capacitors C1 and C2.
4. The simple and practical current transformer transformation ratio field tester according to claim 1, is characterized in that: aiming at the secondary clamp type ammeter (3), the secondary clamp type ammeter comprises a microprocessor U2(3.1), a serial port RXD and a serial port TXD of the microprocessor U2(3.1) are connected with a Bluetooth module RF21(3.3), a battery BT21(3.4) is a power supply of the secondary clamp type ammeter (3), and a rechargeable lithium battery is selected; the secondary current is input by a clamp type current transformer ECQB (3.2), and is connected to an AD input channel IIN-, IIN + pin of a microprocessor U2(3.1) after being conditioned by a secondary signal circuit, the current value is calculated by the microprocessor U2, and the mobile phone APP (1) is read through a Bluetooth module RF21 (3.3).
5. The simple and practical current transformer transformation ratio field tester according to claim 1, is characterized in that: the secondary clamp type ammeter (3) comprises a clamp body (4), wherein a hanging part (5) for clamping is arranged at the front end of the clamp body (4), and a rear grab handle (9) is arranged at the rear end of the clamp body (4); the clamp body (4) is provided with a rope hanging part (6) for connecting a pulling rope (7), and the end part of the connecting pulling rope (7) is provided with an external insulating rubber sleeve (8) which is sleeved on the hanging part (5) when not in use and sleeved on the rear grab handle (9) when in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120646695.6U CN215813292U (en) | 2021-03-17 | 2021-03-17 | Simple and practical field tester for transformation ratio of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120646695.6U CN215813292U (en) | 2021-03-17 | 2021-03-17 | Simple and practical field tester for transformation ratio of current transformer |
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| Publication Number | Publication Date |
|---|---|
| CN215813292U true CN215813292U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120646695.6U Active CN215813292U (en) | 2021-03-17 | 2021-03-17 | Simple and practical field tester for transformation ratio of current transformer |
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| CN (1) | CN215813292U (en) |
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2021
- 2021-03-17 CN CN202120646695.6U patent/CN215813292U/en active Active
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