1. Overview
Zinc oxide arrester is an electrical product used to protect various electrical equipment in the power system from overvoltage damage, and has good protection performance. In order to test whether the performance of zinc oxide arrester is normal, we have developed zinc oxide arrester tester in time, which is a special instrument for on-site and laboratory detection of various relevant electrical parameters of arrester, and is widely used in on-site online monitoring (live test) and laboratory (power outage maintenance) of zinc oxide arrester. It meets the requirements of the power industry standard of the People's Republic of China "DL474.5-92 Field Insulation Test Implementation Guidelines-Arrester Test". This instrument adopts high-precision sampling and processing circuit controlled by high-speed microcomputer and advanced Fourier harmonic analysis technology to ensure the reliability of data. It can measure the full current, resistive current, third harmonic current, fifth harmonic current, seventh harmonic current, primary voltage, active power and phase difference angle between voltage and current of zinc oxide arrester under power frequency voltage. To judge the degree of MOA insulation moisture and valve aging.
The equipment uses a large-screen color LCD display, full Chinese menu prompts operation and print output. Make the human-machine exchange function stronger. This instrument has the characteristics of simple wiring, high measurement accuracy and strong reliability.
2. Functional characteristics
1. The instrument is a high-precision test instrument specially used to detect the performance and quality problems of zinc oxide lightning arresters; it also has the functions of electrical parameter testing, vector analysis and harmonic testing.
2. It can accurately measure voltage, total current, resistive current, capacitive current, 3rd harmonic current, 5th harmonic current, 7th harmonic current, phase difference of fundamental current leading fundamental voltage, active power, frequency and other electrical parameters.
3. It can display the vector diagram of the measured fundamental voltage and fundamental current.
4. The current measurement adopts the direct wiring method, which can guarantee the accuracy of the test data to the greatest extent.
5. There are two measurement methods: PT and no PT.
6. All test interfaces have a screen lock function to facilitate users to read and analyze data.
7. Built-in large-capacity data storage, all test data can be saved in the form of records for later reference.
8. The instrument can expand the USB interface, which can easily copy the data directly to the background management computer.
9. The instrument can be equipped with a micro printer to print out the on-site test data at any time.
10. It has a perpetual calendar and clock function, and displays the date and time in real time. The date and time of the test can be saved while saving the on-site test data.
11. It uses a large-screen imported color LCD as the display, and the Chinese operation interface is equipped with Chinese character prompt information, a multi-parameter LCD display interface, and a friendly human-computer dialogue interface.
12. Conductive silicone buttons, good feel, long life, reasonable design, and easy operation.
13. Built-in large-capacity, high-performance lithium-ion rechargeable battery, fully charged and continuous working for more than 10 hours.
14. Small size, light weight, easy to carry, very suitable for on-site measurement.
3. Technical indicators
1. Input characteristics
Voltage measurement range: 0~250V
Current measurement range: 0.0~10mA (optional clamp meter, extended range to 0~5A~25A)
Phase angle measurement range: 0~359.99°
Frequency measurement range: 45~55Hz
Number of voltage channels: three channels (UA, UB, UC)
Number of current channels: three channels (IA, IB, IC)
Maximum number of harmonic analysis times: 16 times
Maximum number of storage records: 500
2. Accuracy
Voltage: ±0.2%
Frequency: ±0.005Hz
Current, power: ±0.5%
Phase: ±0.5°
3. Operating temperature: -10℃~ +40℃
4. Charging power supply: AC100V～220V, frequency 45Hz-55Hz
5. Host power consumption: ≤3VA
6. Maximum battery working time: ≥10 hours
7. Insulation:
⑴. The insulation resistance of the voltage and current input terminals to the housing is ≥100MΩ.
⑵. The working power input terminal is subjected to a power frequency of 1.5KV (effective value) between the housing and the working power input terminal for 1 minute.
8. Volume: 320mm×240mm×130mm
9. Weight: 2.6 Kg
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