CN2468060Y - Comprehensive error checking meter for electric energy metering apparatus - Google Patents
Comprehensive error checking meter for electric energy metering apparatus Download PDFInfo
- Publication number
- CN2468060Y CN2468060Y CN 00232418 CN00232418U CN2468060Y CN 2468060 Y CN2468060 Y CN 2468060Y CN 00232418 CN00232418 CN 00232418 CN 00232418 U CN00232418 U CN 00232418U CN 2468060 Y CN2468060 Y CN 2468060Y
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- circuit
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- electric energy
- energy meter
- microprocessor
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Abstract
The utility model relates to a comprehensive error checking meter for an electric energy metering apparatus, which is composed of a separable sampled signal transmitting device of the electric energy meter, a signal reception processing device and a calibrating device, wherein, the sampled signal transmitting device of the electric energy meter comprises a signal acquisition circuit and a transmission circuit; the signal reception processing and calibrating device comprises a signal reception processing circuit and a checking circuit. The transmission of the electric energy meter sampled signals between separable two part devices can be realized. The comprehensive error test can be carried out to an electricity energy metering device composed of devices with relatively remote distance. The utility model has the advantages that high efficiency can be realized, accuracy of the test result can be relatively enhanced, labor intensity of an operator can be lightened, and the operating safety can be enhanced.
Description
The utility model relates to a kind of calibration equipment, particularly relates to a kind of electric power meter error checking instrument.
Electric power meter is made of electric energy meter, mutual inductor and secondary circuit, and any part goes wrong and all can cause electric energy metering error, causes the electric energy metrical mistake, causes that trade settlement is incorrect, so the reply electric power meter is tested.Because the electromagnetic transformer operation is comparatively stable, the general variation of the error after calibrating is little, and it mainly is to be made of PT secondary circuit and electric energy meter that the error of measuring apparatus changes, and should regularly test it.Traditional method of testing adopts and respectively electric energy meter and PT secondary circuit is tested, and promptly utilizes electric energy meter field verification check electric energy meter error, utilizes PT secondary voltage drop tester to insert test cable the PT secondary circuit is tested.Because PT secondary circuit lead is hundreds of rice, test cable is connected on the secondary circuit two ends respectively also will have corresponding length.Also want phase-splitting to test during the three-phase test, extremely inconvenient, careless slightly can leading to a disaster constitutes a threat to operation of power networks and personal security during live testing.To further calculate composition error with electric energy meter error again through calculating the PT secondary voltage drop after the end of test (EOT).This method of testing testing complex uses instrument many, and the test duration is long, and the test point and the test event of access are many, and it is many to take personnel, not easy to operate, has certain unsafe factor, and test result is inaccurate.
The purpose of this utility model provides a kind of simple to operate, safe in utilization, electric power meter composition error tester that the test result accuracy is high.
For achieving the above object, the utility model adopts following technical scheme: this electric power meter composition error tester is by separable electric energy meter sampled signal dispensing device, signal receives to be handled and the calibration equipment composition, the electric energy meter sampled signal transmits between separable two parts device, electric energy meter sampled signal dispensing device comprises signal sampling and transtation mission circuit, signal sample circuit is connected with signal sending circuit, signal receives processing and calibration equipment comprises signal receiving processing circuit and checking circuit, signal receiving processing circuit output termination checking circuit input end.
Checking circuit comprises microprocessor and the keyboard and display, PT secondary circuit top voltage current transformating circuit, A/D converter and the external RAM that are connected with microprocessor, above-mentioned signal receiving processing circuit output termination microprocessor input end, voltage current transformating circuit connects microprocessor by A/D converter.
Microprocessor comprises primary processor and from processor, is connected to dual port RAM between the two.
The transmission receive mode that sampled signal dispensing device and signal receive between processing and the calibration equipment can adopt modes such as wireless system, carrier system, infrared mode, optical cable transmission.
Voltage and current signal of the present utility model is taken from PT secondary circuit top, directly record the top information about power, electric energy meter information is taken from the secondary circuit end, sampled signal is sent and receive by dispensing device by the receiving trap at top, calculate the composition error of PT secondary circuit and electric energy meter by microprocessor, directly be presented on the display.Compare with original method of testing, the utility model uses instrument few, the testing efficiency height, and the test result accuracy also improves a lot, and has alleviated labor intensity of operating personnel, has improved the security of work.
Further specify the utility model below in conjunction with accompanying drawing:
Fig. 1 is the connection synoptic diagram of the utility model in electric power meter;
Fig. 2 is a circuit theory synoptic diagram of the present utility model.
As shown in Figure 1, be connected on PT secondary circuit top by the composition error tester main body 1 that the signal reception is handled and calibration equipment constitutes, electric energy meter sampled signal dispensing device 2 is connected on the terminal electric energy meter of PT secondary circuit 3 places.Electric energy meter sampled signal dispensing device comprises signal sample circuit, signal sending circuit.Signal sample circuit can adopt existing sampling thief, and is not shown in Fig. 1, but sampled signal is represented with S and direct input signal transtation mission circuit 4.Signal sending circuit 4 both can adopt the integrated package F05A shown in Fig. 1, also can adopt the integrated circuit of other model, the circuit that also can adopt discrete component to form.Signal receiving processing circuit 5 can adopt the integrated package J05A shown in Fig. 1, also can adopt the integrated circuit of other model, the circuit that also can adopt discrete component to form.Signal receiving processing circuit 5 connects the input end from CPU2, is connected by dual port RAM 1 between CPU2 and the host CPU 1.Also be connected to RAM2, real time clock circuit 6, keyboard 7 and LCD display 8 from CPU2.The voltage U at PT secondary circuit top and electric current I signal input translation circuit 9, translation circuit 9 will be imported electric weight and carry out conversion, with high voltage and big current transformation is low-voltage and little electric current input a/d converter, A/D converter output termination host CPU 1 input end, host CPU 1 also is connected to self-correcting pulse producer 10, the pulse signal that produces exports other error checking instrument to, is used for the error of verification this tester self.
When carrying out verification, the information about power of electric energy meter is sampled and input signal transtation mission circuit 4, send by 4 pairs of these signal shapings of signal sending circuit, modulation back by signal sampler.Carry out inputing to from CPU2 after the demodulation by signal receiving processing circuit 5 these signals of reception and to it.The information about power of this electric energy meter is stored among the RAM2.On the other hand, information about power such as the voltage U that records from PT secondary circuit top, electric current I input to the host CPU 1, are calculated and verification by the information about power that dual port RAM 1 reads electric energy meter by host CPU 1, and check results shows by display.
Claims (4)
1, a kind of electric power meter composition error tester, it is characterized in that, it receives processing by separable electric energy meter sampled signal dispensing device, signal and calibration equipment is formed, the electric energy meter sampled signal transmits between separable two parts device, electric energy meter sampled signal dispensing device comprises signal sampling and transtation mission circuit, signal sample circuit is connected with signal sending circuit, signal receives processing and calibration equipment comprises signal receiving processing circuit and checking circuit, signal receiving processing circuit output termination checking circuit input end.
2, composition error tester as claimed in claim 1, it is characterized in that, checking circuit comprises microprocessor and the keyboard and display, PT secondary circuit top voltage current transformating circuit, A/D converter and the external RAM that are connected with microprocessor, above-mentioned signal receiving processing circuit output termination microprocessor input end, voltage current transformating circuit connects microprocessor by A/D converter.
3, composition error tester as claimed in claim 2 is characterized in that, microprocessor comprises primary processor and from processor, is connected to dual port RAM between the two.
4, as claim 1,2 or 3 described composition error testers, it is characterized in that the transmission receive mode that sampled signal dispensing device and signal receive between processing and the calibration equipment can adopt modes such as wireless system, carrier system, infrared mode, optical cable transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00232418 CN2468060Y (en) | 2000-11-14 | 2000-11-14 | Comprehensive error checking meter for electric energy metering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00232418 CN2468060Y (en) | 2000-11-14 | 2000-11-14 | Comprehensive error checking meter for electric energy metering apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2468060Y true CN2468060Y (en) | 2001-12-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00232418 Expired - Fee Related CN2468060Y (en) | 2000-11-14 | 2000-11-14 | Comprehensive error checking meter for electric energy metering apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2468060Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262180A (en) * | 2011-07-05 | 2011-11-30 | 珠海市科荟电器有限公司 | Wireless secondary voltage drop test device |
| CN102621519A (en) * | 2012-04-27 | 2012-08-01 | 江苏省电力公司宿迁供电公司 | Tester for electric energy metering device |
| CN101776740B (en) * | 2010-01-19 | 2012-12-26 | 云南电网公司 | Electric energy metering automation simulation laboratory |
| CN105158724A (en) * | 2015-08-18 | 2015-12-16 | 宁波三星智能电气有限公司 | NRF905-based wireless meter calibration system and meter calibration method thereof |
| CN106405479A (en) * | 2016-10-21 | 2017-02-15 | 中国电力科学研究院 | Intelligent junction box used for gateway electric energy meter field inspection and inspection method thereof |
-
2000
- 2000-11-14 CN CN 00232418 patent/CN2468060Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776740B (en) * | 2010-01-19 | 2012-12-26 | 云南电网公司 | Electric energy metering automation simulation laboratory |
| CN102262180A (en) * | 2011-07-05 | 2011-11-30 | 珠海市科荟电器有限公司 | Wireless secondary voltage drop test device |
| CN102621519A (en) * | 2012-04-27 | 2012-08-01 | 江苏省电力公司宿迁供电公司 | Tester for electric energy metering device |
| CN105158724A (en) * | 2015-08-18 | 2015-12-16 | 宁波三星智能电气有限公司 | NRF905-based wireless meter calibration system and meter calibration method thereof |
| CN105158724B (en) * | 2015-08-18 | 2018-05-29 | 宁波三星智能电气有限公司 | A kind of correction method based on the wireless meter correcting systems of nRF905 |
| CN106405479A (en) * | 2016-10-21 | 2017-02-15 | 中国电力科学研究院 | Intelligent junction box used for gateway electric energy meter field inspection and inspection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |