With the development of the power industry and the popularization and application of microcomputer integrated automation products, the correctness of the wiring of the protection circuit and the metering circuit directly affects the stability of the power system and the accuracy of electricity bill measurement. These two points are the power system. Two very important aspects.
Because there are many connections between the protection device and the high-voltage metering device, it is easy to cause wrong wiring, but it is not easy to be detected. It is easy to connect wrongly, and it may not malfunction or refuse to move in normal operation, which has great hidden dangers). Our company developed the "three-phase protection loop vector analyzer" in due course according to the needs of on-site testing.
This product integrates multiple functions and has a variety of measurement functions. The main measurement functions are:
Phase meter function—verify the correctness of the main transformer differential protection and bus differential phase;
Electrical parameter tester function—test the necessary electrical parameters of the power system;
Metering wiring detector function-to detect the three-phase three-wire electric energy metering wiring;
Harmonic content test function—test the harmonic content of voltage and current on site;
Oscilloscope function—display histogram as a simple oscilloscope to observe the waveform of the test signal.
The measuring instrument adopts DSP AC sampling, which can measure three-channel voltage and three-channel current analog quantity at the same time. The six-channel vector of the instrument is displayed on the same screen, and the man-machine dialogue interface is friendly.
Self-developed mold-opening handheld structure, high-strength engineering plastics, strong and light, easy to use, greatly convenient for on-site use, and is a powerful assistant for electric workers.
1. Input characteristics
Number of voltage channels: 3 channels
Voltage measurement range: 0~450V
Voltage display resolution: 0.01V
Number of current channels: 3 channels
Current measurement range: 0~10A
Current display resolution: 0.0001A
Phase measurement range: -180°～＋180°
Harmonic analysis times: 2～63 times
2. Accuracy
Voltage: ±0.2%
Current, power: ±0.5%
Phase angle: ±1°
Harmonic voltage content rate measurement error: ≤0.3%
Harmonic current content rate measurement error: ≤0.5%
3. Working temperature: -15℃~ ＋40℃
4. Charging power supply: AC 160V~260V
5. Insulation: ⑴. The insulation resistance of the voltage and current input terminals to the chassis is ≥100MΩ.
⑵The power frequency is 2KV (effective value) between the input terminal of the working power supply and the shell, and the experiment lasts for 1 minute.
6. Volume: 250mm×160mm×60mm
7. Weight: 1.8Kg
1. Three-way voltage and three-way current vectors are displayed on the same screen. For complex differential protection devices, the double clamp method can be used to perform multiple measurements and finally draw a complete hexagonal diagram.
2. Use clamp-type current transformer for wiring, no need to disconnect the current loop, safe and convenient.
3. Vector analysis of complex protection devices can be performed to determine whether the wiring is correct, and the correct wiring diagram is provided for comparison.
4. Routine electrical parameter testing can be performed, and three-phase voltage, three-phase current, three-phase active power, three-phase apparent power, three-phase phase angle can be displayed at the same time; and the voltage amplitude converted to the primary side of the transformer can be directly read. The magnitude of the current and the value of the power.
5. It can check the wrong wiring of the three-phase three-wire high-voltage metering device, analyze and judge 48 types of three-phase three-wire connections, and directly give the analysis results; investigate and deal with the stealing means of maliciously changing the metering wiring, effectively avoiding the loss of electricity bills.
6. Harmonic analysis of the measured signal on site can be performed, and the content of the 2-50th harmonics can be analyzed, and the total harmonic distortion can be automatically calculated.
7. Large screen, high-brightness color LCD display, full Chinese character graphical menu and operation prompts to realize friendly man-machine dialogue. Silicone touch buttons make the operation more comfortable and feel better. LCD wide temperature, with brightness adjustment, suitable for winter and summer Seasonal environmental applications.
8. It is powered by a large-capacity lithium battery and can work continuously for up to 8 hours.
9. The user can save the test data in the form of records at any time for centralized management, filing, and reference. It can store more than 1,000 sets of data.
10. The saved records can be uploaded to the background management computer for comprehensive analysis and review.
11. With perpetual calendar and clock functions, real-time display of the date and time of the test work.
12. Small size and light weight, easy to use on site.
13. The USB interface is reserved, and the instrument can be used to replace mobile storage devices such as USB flash drives.
Mobile version
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