CN211426781U - Electric energy meter power frequency magnetic field noise immunity test device - Google Patents
Electric energy meter power frequency magnetic field noise immunity test device Download PDFInfo
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- CN211426781U CN211426781U CN201922406071.2U CN201922406071U CN211426781U CN 211426781 U CN211426781 U CN 211426781U CN 201922406071 U CN201922406071 U CN 201922406071U CN 211426781 U CN211426781 U CN 211426781U
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Abstract
The utility model relates to an electric energy meter power frequency magnetic field immunity test device, which comprises a three-phase meter calibrating device with the accuracy grade of 0.02 grade or 0.05 grade, an exciting current source, a motion control unit, a tested electric energy meter connecting seat and a control computer; the motion control unit is internally provided with 2 servo motors which respectively drive the coil rotating mechanism and the meter connecting seat rotating mechanism; the coil rotating mechanism drives the coil to rotate at +/-90 degrees around the horizontal X axis, and the meter connecting seat rotating mechanism drives the electric energy meter test bed to rotate at +/-90 degrees around the vertical Z axis; the tested electric energy meter connecting seat is a compatible connecting seat with a socket and different phenotypes capable of being replaced, and comprises a pressure meter mechanism with an elastic voltage terminal, a current terminal and a screw type propelling mechanism; the control computer is connected with the magnetic field intensity measuring unit, the three-phase meter calibrating device and the motion control unit through the RS232 serial port and the LAN port.
Description
Technical Field
The utility model belongs to the technical field of a meter power frequency magnetic field noise immunity test device that is used for industry or civilian measurement electric energy.
Background
At present, when the electric energy meter is in the field operation process, the electric energy meter still has a very small amount of accumulated electric energy when finding that the electric power users in a certain area do not use electricity; the electric energy meter is influenced by a strong power frequency magnetic field, and the current sampling loop generates induced current in an alternating magnetic field environment under the condition of lacking effective magnetic disturbance prevention measures, so that the electric quantity is increased; in order to avoid the problems, a complete set of device and a complete set of method are needed for automatically detecting the electric energy meter, and the existing product is, for example, a power frequency magnetic field immunity test device of the electric energy meter, patent number 201320678825. X; the device is designed and manufactured according to the national standard of the old version of the electric energy meter, and compared with the national standard of the new version of the electric energy meter, the original product has the following defects: the device is of a split structure, the test power supply and the standard meter are positioned in a special cabinet, and the occupied space of equipment is large; the test coil and the test frame shell of the device are assembled by adopting machined parts, so that the appearance process is not attractive; the driving motor of the coil of the device is driven by a synchronous stepping motor, and the control precision is low; the maximum power frequency magnetic field intensity output by a power frequency magnetic field coil of the device is 0.5 mT; during the electric energy meter test of the device, a pull terminal, a test lead and manual wiring are adopted for wiring; the device has no magnetic field strength test function at the test position of the electric energy meter, and does not meet the requirements of the new national standard GB/T17215.211.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric energy meter power frequency magnetic field noise immunity test device for solve unsatisfied new national standard among the prior art, artifical efficiency of software testing is low, the equipment space is big, control accuracy is low, test power frequency magnetic field intensity is little problem.
In order to solve the problem, the utility model provides an electric energy meter power frequency magnetic field noise immunity test device can satisfy new international standard IR46 active electric energy meter comprehensively to and new national standard GB/T17215.211's requirement.
The technical scheme created by the invention is as follows: a kind of electric energy meter power frequency magnetic field immunity test device, the electric energy meter power frequency magnetic field immunity test device includes the three-phase meter calibrating installation, excitation current source, movement control unit, tested electric energy meter connecting seat, control computer with the accuracy grade of 0.02 grade or 0.05 grade; the motion control unit is internally provided with 2 servo motors which respectively drive the coil rotating mechanism and the meter connecting seat rotating mechanism; the coil rotating mechanism drives the coil to rotate at +/-90 degrees around the horizontal X axis, and the meter connecting seat rotating mechanism drives the electric energy meter test bed to rotate at +/-90 degrees around the vertical Z axis; the tested electric energy meter connecting seat is a compatible connecting seat with a socket and different phenotypes capable of being replaced, and comprises a pressure meter mechanism with an elastic voltage terminal, a current terminal and a screw type propelling mechanism; the control computer is connected with the magnetic field intensity measuring unit, the three-phase meter calibrating device and the motion control unit through the RS232 serial port and the LAN port; the electric energy meter power frequency magnetic field immunity test device comprises a main cabinet, a rotary test coil, a test board bracket, an electric energy meter test board base, a quick crimping type meter connecting seat, an electric energy meter test board, a magnetic field test coil and an input/output terminal group; a test power supply, a calibrating device and a motor driving device are arranged in the main cabinet; a driving belt is arranged in the shell of the test bench bracket; the magnetic field testing coil is arranged below the electric energy meter testing platform; the rapid crimping type meter connecting seat comprises a matched screw rod pushing type meter pressing mechanism.
Preferably, the electric energy meter power frequency magnetic field immunity test device comprises a I-type device frame, a power frequency magnetic field table body appearance assembly, a portable three-phase device, a power supply differential signal box, a CK485 serial server, an excitation current source, a power frequency magnetic field motion control assembly, a left support appearance piece, a left support, a right support appearance piece, a right support, a magnetic ring assembly, a magnetic ring motor assembly, a rotating platform motor assembly, a rotating platform appearance assembly, a three-phase verification terminal assembly, a bottom plate, a laminated plate, a base plate, a power frequency magnetic field immunity test device wiring harness, a caster assembly, a screw assembly, a wire slot, a current transformer and a power frequency magnetic field table body paster assembly, wherein the caster assembly is installed on the lower bottom surface of a main.
In order to further understand the inventive principle of the present invention, the modules involved in the power frequency magnetic field immunity test device are introduced as follows:
1. the three-phase meter calibrating device with the accuracy grade of 0.02 grade or 0.05 grade can test the error influence quantity and the immunity of the electric energy meter under the magnetic field environment.
2. And the excitation current source can provide controllable current for the test coil so as to generate the power frequency magnetic field intensity of 0-1.5 mT.
3. The motion control unit is internally provided with a servo motor of each shaft, and the servo motor respectively drives the coil rotating mechanism and the meter connecting seat rotating mechanism, the coil rotating mechanism drives the coil to rotate at +/-90 degrees around the horizontal X shaft, and the meter connecting seat rotating mechanism drives the electric energy meter test bed to rotate at +/-90 degrees around the vertical Z shaft.
4. The electric energy meter is connected with the meter seat, the meter seat is connected with the rotating electric energy meter test bed, the meter seat is a pressure meter mechanism with a socket, different types of meters can be replaced, the compatible meter seat is provided with an elastic voltage terminal and a current terminal, and a screw type propulsion mechanism, after the electric energy meter is placed on the test bed, the handle of the pressure meter is rotated, and the electric energy meter can be automatically compressed to perform test testing.
5. The control computer controls the external unit modules through an RS232 serial port, an LAN port and the like, and automatically finishes various tests under the control of upper control software.
In order to facilitate further understanding of related hardware created by the invention, the modules related to the power frequency magnetic field immunity test device are introduced as follows: the tested electric energy meter connecting seat is a quick pressure-welding type meter connecting seat capable of replacing different phenotypes and a matched screw rod propelling type meter pressing mechanism; the electric energy meter test board can horizontally and automatically rotate; the input and output terminal group is arranged on one side of the test cabinet and used for device calibration, power supply and communication control.
The utility model discloses following beneficial effect has:
1. the integrated structure, modular design, three-phase electric energy meter calibrating installation are located the rack of equipment below.
2. The test coil and the test frame shell of the device are designed and processed by adopting a special injection molding and plastic suction mold, the magnetic field distribution is not influenced, and the appearance is attractive.
3. A driving motor of the device coil and a rotating motor of the rotating test bed are driven by servo motors.
4. The maximum power frequency magnetic field intensity output by the power frequency magnetic field coil of the device is 1.5mT, and 4 tests can be automatically carried out according to the latest standard.
5. When the electric energy meter of the device is tested, the connection adopts a replaceable compatible screw compression joint type meter connecting seat, and the connection efficiency is high.
6. The device is provided with a magnetic field intensity test function at the electric energy meter test position.
Drawings
Fig. 1 is the utility model discloses a schematic diagram of electric energy meter power frequency magnetic field noise immunity test device of embodiment.
Fig. 2 is the utility model discloses a power frequency magnetic field immunity test device's of electric energy meter stereogram.
Fig. 3 is the utility model discloses a main view of electric energy meter power frequency magnetic field noise immunity test device of embodiment.
Fig. 4 is the utility model discloses a top view of electric energy meter power frequency magnetic field noise immunity test device of embodiment.
Fig. 5 is a left side view of the utility model discloses electric energy meter power frequency magnetic field noise immunity test device of embodiment.
Fig. 6 is the utility model discloses a power frequency magnetic field immunity test device's of electric energy meter stereogram.
Fig. 7 is the utility model discloses a power frequency magnetic field immunity test device's of electric energy meter stereogram.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The power frequency magnetic field immunity test device is shown in a schematic block diagram in fig. 1, and an example design of the power frequency immunity test device is shown in fig. 2, wherein 1 is a main cabinet, 2 is a test board bracket, 3 is a rotary test coil, 4 is an electric energy meter test board base, 5 is a quick crimping type meter connecting base, 6 is an electric energy meter test board, 7 is a magnetic field test coil, and 8 is an input terminal group and an output terminal group; the utility model provides an electric energy meter power frequency magnetic field immunity test device as shown in fig. 1-2, which comprises a three-phase meter calibrating device with the accuracy grade of 0.02 grade or 0.05 grade, an exciting current source, a motion control unit, a tested electric energy meter connecting seat and a control computer; the motion control unit is internally provided with 2 servo motors which respectively drive the coil rotating mechanism and the meter connecting seat rotating mechanism; the coil rotating mechanism drives the coil to rotate at +/-90 degrees around the horizontal X axis, and the meter connecting seat rotating mechanism drives the electric energy meter test bed to rotate at +/-90 degrees around the vertical Z axis; the tested electric energy meter connecting seat is a compatible connecting seat with a socket and different phenotypes capable of being replaced, and comprises a pressure meter mechanism with an elastic voltage terminal, a current terminal and a screw type propelling mechanism; the control computer is connected with the magnetic field intensity measuring unit, the three-phase meter calibrating device and the motion control unit through the RS232 serial port and the LAN port; the electric energy meter power frequency magnetic field immunity test device comprises a main cabinet 1, a rotary test coil 3, a test board bracket 2, an electric energy meter test board base table 4, a quick compression joint type meter connecting seat, an electric energy meter test board 6, a magnetic field test coil 7 and an input/output terminal group 8; a test power supply, a calibrating device and a motor driving device are arranged in the main cabinet 1; a driving belt is arranged in the shell of the test bench bracket 2; the magnetic field test coil 7 is arranged below the electric energy meter test bench 6; the rapid crimping type meter connecting seat 5 comprises a matched screw rod pushing type meter pressing mechanism.
In one embodiment of the present application, as shown in fig. 3-7, 1 is a class I device frame, 2 is a power frequency magnetic field stage body appearance assembly, 3 is a portable three-phase device, 4 is a power supply differential signal box, 5 is a CK485 serial server, 6 is an excitation current source, 7 is a power frequency magnetic field motion control assembly, 8 is a left support appearance, 9 is a left support, 10 is a right support appearance, 11 is a right support, 12 is a magnetic ring assembly, 13 is a magnetic ring motor assembly, 14 is a rotating platform assembly, 15 is a rotating platform motor assembly, 16 is a rotating platform appearance assembly, 17 is a three-phase verification terminal assembly, 18 is a bottom plate, 19 is a laminate, 20 is a substrate, and a caster assembly is installed on the bottom surface of a main cabinet.
In the embodiment of the application, the test items of the power frequency magnetic field immunity test device comprise the following items:
1. magnetic field sensitive position detection
In the range of +/-90 degrees of the coil and the range of +/-90 degrees of the electric energy meter test bed, a plurality of position test points are arranged according to the rotating angle interval (can be set), the coil automatically and sequentially rotates to each test point, the electric energy meter is tested, the error influence quantity after a 0.5mT power frequency magnetic field is applied under the state is tested, the position with the maximum error influence is found, and the position is marked as a magnetic field sensitive position.
2. Power frequency magnetic field immunity error test
Applying a 0.5mT magnetic field at a magnetic field sensitive position, carrying out rule-specified error point test on the electric energy meter, calculating the variation of each error point and the error value of the point in a non-magnetic field state, and judging whether the standard specified requirement is exceeded, wherein the specific test requirement is as follows:
a voltage circuit applies a nominal voltage;
the current circuit applies the current value given in the relevant standard of GB/T17215.3;
the power factor (or sin phi) of the tested signal is required to be given according to the GB/T17215.3 relevant standard;
the test should be applied on three perpendicular planes of the meter:
external magnetic induction is generated by current with the same frequency as the voltage applied on the instrument, and the instrument to be tested is arranged at the center of the induction coil; changing the direction and the phase of the external magnetic induction pair instrument, and determining the condition that the instrument is in the most adverse direction and phase of the external power frequency magnetic field by using the maximum offset of the instrument error;
the magnetic induction intensity is 0.5mT (400A/m);
the duration of the test should be 1 min.
3. Power frequency magnetic field immunity (no load) test
The instrument should be in working condition:
the voltage circuit applies a nominal voltage of 1.15 times;
the current circuit has no current, and the current terminal should be open;
the test should be applied on three perpendicular planes of the meter:
external magnetic induction is generated by current with the same frequency as the voltage applied on the instrument, and the instrument to be tested is arranged at the center of the induction coil; changing the direction and phase of the external magnetic induction to the instrument, and determining that the instrument is located in an external work area according to the maximum offset of the instrument error;
test time: 20 times of starting test time, and the starting test time can be calculated according to the verification procedure.
4. Power frequency magnetic field influence test
The instrument should be in working condition:
the current circuit has no current, and the current terminal should be open;
the test should be applied to each surface of the meter:
external magnetic induction is generated by current with the same frequency as the voltage applied on the instrument, and the instrument to be tested is arranged at the center of the induction coil; changing the direction and the phase of the external magnetic induction pair instrument, and determining the condition that the instrument is in the most adverse direction and phase of the external power frequency magnetic field by using the maximum offset of the instrument error;
immersion test mode; short-time magnetic fields (3 s) are applied to three perpendicular planes of the meter;
short-time (3 s) magnetic induction: 1.5mT, 1000A/m;
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (2)
1. The utility model provides an electric energy meter power frequency magnetic field noise immunity test device which characterized in that: the electric energy meter power frequency magnetic field immunity test device comprises a three-phase meter calibrating device with the accuracy grade of 0.02 grade or 0.05 grade, an excitation current source, a motion control unit, a tested electric energy meter connecting seat and a control computer;
the motion control unit is internally provided with 2 servo motors which respectively drive the coil rotating mechanism and the meter connecting seat rotating mechanism; the coil rotating mechanism drives the coil to rotate at +/-90 degrees around the horizontal X axis, and the meter connecting seat rotating mechanism drives the electric energy meter test bed to rotate at +/-90 degrees around the vertical Z axis;
the tested electric energy meter connecting seat is a compatible connecting seat with a socket and different phenotypes capable of being replaced, and comprises a pressure meter mechanism with an elastic voltage terminal, a current terminal and a screw type propelling mechanism;
the control computer is connected with the magnetic field intensity measuring unit, the three-phase meter calibrating device and the motion control unit through the RS232 serial port and the LAN port;
the electric energy meter power frequency magnetic field immunity test device comprises a main cabinet, a rotary test coil, a test board bracket, an electric energy meter test board base, a quick crimping type meter connecting seat, an electric energy meter test board, a magnetic field test coil and an input/output terminal group;
a test power supply, a calibrating device and a motor driving device are arranged in the main cabinet; a driving belt is arranged in the shell of the test bench bracket;
the magnetic field testing coil is arranged below the electric energy meter testing platform;
the rapid crimping type meter connecting seat comprises a matched screw rod pushing type meter pressing mechanism.
2. The electric energy meter power frequency magnetic field immunity test device of claim 1, characterized in that: the portable three-phase magnetic field detection device comprises a class I device frame, a power frequency magnetic field table body appearance assembly, a portable three-phase device, a power supply differential signal box, a CK485 serial port server, an excitation current source, a power frequency magnetic field motion control assembly, a left support appearance piece, a left support, a right support appearance piece, a right support, a magnetic ring assembly, a magnetic ring motor assembly, a rotary platform motor assembly, a rotary platform appearance assembly, a three-phase detection terminal assembly, a bottom plate, a laminated plate and a base plate, wherein a caster wheel assembly is arranged on the lower bottom surface of a.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922406071.2U CN211426781U (en) | 2019-12-27 | 2019-12-27 | Electric energy meter power frequency magnetic field noise immunity test device |
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| CN201922406071.2U CN211426781U (en) | 2019-12-27 | 2019-12-27 | Electric energy meter power frequency magnetic field noise immunity test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964950A (en) * | 2021-02-05 | 2021-06-15 | 华中科技大学 | Method for testing power frequency electromagnetic interference resistance of capacitive equipment online monitoring device |
| CN113109756A (en) * | 2021-04-19 | 2021-07-13 | 河南省计量科学研究院 | External power frequency magnetic field test method for electric energy meter |
| CN116699373A (en) * | 2023-08-08 | 2023-09-05 | 北京智芯微电子科技有限公司 | Chip external constant magnetic field immunity detection device and chip |
| CN116930851A (en) * | 2023-06-26 | 2023-10-24 | 南京国电南自电网自动化有限公司 | System and method for detecting interference immunity of power frequency magnetic field of relay protection device |
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2019
- 2019-12-27 CN CN201922406071.2U patent/CN211426781U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964950A (en) * | 2021-02-05 | 2021-06-15 | 华中科技大学 | Method for testing power frequency electromagnetic interference resistance of capacitive equipment online monitoring device |
| CN113109756A (en) * | 2021-04-19 | 2021-07-13 | 河南省计量科学研究院 | External power frequency magnetic field test method for electric energy meter |
| CN113109756B (en) * | 2021-04-19 | 2023-09-12 | 河南省计量测试科学研究院 | Electric energy meter external power frequency magnetic field test method |
| CN116930851A (en) * | 2023-06-26 | 2023-10-24 | 南京国电南自电网自动化有限公司 | System and method for detecting interference immunity of power frequency magnetic field of relay protection device |
| CN116699373A (en) * | 2023-08-08 | 2023-09-05 | 北京智芯微电子科技有限公司 | Chip external constant magnetic field immunity detection device and chip |
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