Products Overview
Excessive comprehensive error of electric energy measurement is a key problem in electric energy measurement. The measurement error caused by the voltage drop in the secondary circuit of voltage transformer is often the factor affecting the comprehensive error of electric energy measurement. The error caused by the secondary voltage drop of the voltage transformer refers to the percentage of the amplitude difference of the voltage between the secondary terminal and the load terminal of the voltage transformer relative to the secondary actual voltage, as well as the phase difference between the two voltages.
The secondary voltage drop / load tester is a fully automatic intelligent instrument for testing the secondary voltage drop / load of voltage transformer, which is carefully designed and developed by our company by absorbing the advantages of similar products at home and abroad.
The instrument has the advantages of small volume, light weight, high measurement accuracy, good stability, simple operation and easy learning, simple wiring, convenient testing and recording, which greatly improves the work efficiency. It uses LCD in the form of large screen true color diagram as the display window, with graphical menu operation and Chinese character prompt, and a display interface that integrates multiple parameters in one screen. The man-machine dialogue interface is friendly, simple and fast to use. It is the preferred product for power users at all levels.
Technical indicators
1. Input characteristics
Voltage measurement range: 20-200V-800V, automatic gear switching.
Current measurement range
Clamp type transformer (three types): 5A/25A (standard)
100A/500A (optional)
400A/2000A (optional)
1000A/5000A (optional) flexible coil
Phase angle measurement range: 0~359.99 °.
Frequency measurement range: 45~65Hz.
Number of voltage channels: Three channels (UA, UB, UC).
Number of current channels: Three channels (IA, IB, IC).
Maximum harmonic analysis frequency: 63 times.
Maximum continuous storage period with a 1-minute interval: 18 months.
2. Accuracy
Electrical parameter measurement section:
Voltage: ± 0.2%
Frequency: ± 0.01Hz
Current and power: ± 0.5%
Phase: ± 0.2 °
Power quality section:
The allowable error of fundamental voltage is ≤ 0.5% F S.
Allowable error of fundamental current: ≤ 1% F S.
Measurement error of phase difference between fundamental voltage and current: ≤ 0.2 °
Measurement error of harmonic voltage content: ≤ 0.1%
Measurement error of harmonic current content: ≤ 0.2%
Three phase voltage imbalance error: ≤ 0.2%
Voltage deviation error: ≤ 0.2%
Voltage variation error: ≤ 0.2%
3. Working temperature: -10 ºC~+40 ºC
4. Charging power supply: AC220V, frequency 45Hz-55Hz
5. Host power consumption: ≤ 3VA
6. Maximum working time of battery: ≤ 10 hours
7. Insulation:
1) The insulation resistance of the voltage and current input terminals to the casing is ≥ 100M Ω.
2) The working power input terminal is subjected to a power frequency of 1.5KV (effective value) between the casing for 1 minute during the experiment.
| Volume |
320mm × 240mm × 130mm |
| Weight |
2.0Kg |
Product parameters
1. The instrument is a high-precision testing instrument specially used to detect power quality problems such as waveform distortion, harmonic content and three-phase imbalance in the power grid; At the same time, it also has the functions of electric parameter test and vector analysis.
2. It can accurately measure voltage, current, active power, reactive power, phase angle, power factor, frequency and other electrical parameters.
3. It can display the vector diagram of the measured voltage and current, and the user can analyze the vector diagram to obtain whether the wiring of the metering equipment is correct or not.
4. The current is measured by clamp transformer. Because when using clamp current transformer for measurement, the operator does not need to disconnect the current circuit, so the measurement can be carried out conveniently and safely. Clamp meters with different ranges can be selected according to different measuring ranges of users.
5. It can measure and analyze the AC power quality supplied by the public grid to the user end, and its measurement and analysis: frequency deviation, voltage deviation, allowable unbalance of three-phase voltage and grid harmonics.
6. It can display single-phase voltage and current waveforms and three-phase voltage and current waveforms at the same time.
7. All test interfaces have screen locking function to facilitate users to read and analyze data.
8. Load fluctuation monitoring: measure and analyze the fluctuation of power quality of public grid caused by various electrical equipment under different operating conditions. Regularly record and store the change trend of voltage, current, active power, reactive power, apparent power, frequency, phase and other power parameters.
9. Record the active and reactive electric energy consumed at the test point.
10. Dynamic monitoring of power equipment adjustment and operation process to help users solve problems in the process of power equipment adjustment and operation.
11. Be able to test and analyze the dynamic parameters of reactive power compensation and filter devices in power system and make quantitative evaluation on their functions and technical indicators
12. Different storage intervals can be set, and data can be stored continuously according to the set time interval;
13. The built-in large capacity data memory can be stored continuously for more than 18 months at a time interval of 1 minute, which can meet the needs of long-term monitoring of test points.
14. The instrument has a USB interface, which can easily copy the data directly to the background management computer.
15. With powerful data management software, real-time sampling data can be directly uploaded to the background management computer for more comprehensive and faster processing in the background.
16. It has the functions of perpetual calendar and clock, and displays the date and time in real time. It can save the test data and results while testing on site, upload them to the computer through USB flash disk, and realize the microcomputer management of data through the background management software (optional parts), with powerful report function.
17. Select WiFi (Bluetooth) module, and use tablet computer to remotely control the instrument.
18. The large screen imported color LCD is used as the display, and the Chinese operation interface is equipped with the LCD display interface of Chinese character prompt information and multi parameter display. The man-machine dialogue interface is friendly.
19. 3 minutes without operation, the LCD automatically enters the power saving mode, so as to maximize the working time of the battery.
20. Conductive silicone keys have good hand feel, long service life, reasonable design and convenient operation.
21. Built in high-capacity, high-performance lithium-ion rechargeable battery, fully charged and working continuously for more than 10 hours.
22. Small in size, light in weight and easy to carry, it can be used not only for field measurement, but also as standard measuring equipment in the laboratory.
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