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QLD-BA Zinc Oxide Arrester Resistive Current Tester
The QLD-BA Zinc Oxide Arrester Resistive Current Tester provides highly accurate resistive current measurements to assess power system safety and performance. Its precision allows for early detection of potential arrester issues. The device is portable, durable, and easy to use, with a user-friendly interface for efficient on-site diagnostics. It is built to withstand demanding field conditions and complies with industry safety standards, ensuring reliable and safe operation.
Instrument Features
This instrument is used for the measurement and analysis of the total current of zinc oxide surge arresters (MOAs). Its main purpose is to measure the resistive current of the MOA to determine the degree of moisture absorption and aging. This instrument can be used for both field live-line measurements and laboratory factory acceptance tests.
This instrument has the following functions:
- The instrument features a large 800*480 color LCD screen with a Windows interface and touchscreen control. It also includes USB flash drive storage and an RS232 interface.
- It can measure single-phase MOA (Mean Interference Amount), supporting PT (Potential Transmission) mode, no PT mode, wireless mode, inductive mode, and harmonic analysis.
- It can measure three-phase MOA, automatically compensating for phase-to-phase interference or disabling automatic phase-to-phase compensation.
- The reference voltage signal can be measured using 3PT, 1PT, no PT, wireless 3P, wireless 1PT, inductive mode, and harmonic analysis.
- The instrument is equipped with a rechargeable battery, a calendar clock, and a mini printer, capable of storing 9999 sets of measurement data.
- To facilitate resistive current analysis, it allows for both disabling and enabling of side-phase compensation.
- It allows for both waveform printing and disabling of waveform printing. It supports both English and Chinese printing.
Instrument panel diagram
Panel Description:
- 123—Leakage current input terminal;
- 4—Measurement grounding terminal;
- 5—Induction plate; 6—PT voltage input;
- 7—Mini printer;
- 8—Switch;
- 9—Charging socket;
- 10—RS232 serial port;
- 11—USB flash drive port;
- 12—LCD display;
Main technical parameters
- Full current measurement range: 0~20mA RMS; Accuracy: ±(reading × 5% + 5uA)
Resistive current fundamental frequency measurement accuracy (wired, excluding phase-to-phase interference): ±(reading × 5% + 5uA) - Current harmonic measurement accuracy: ±(reading × 10% + 10uA); Current channel input resistance: ≤2Ω
- Reference voltage input range: 25V~250V RMS; Accuracy: ±(reading × 5% + 0.5V)
- Voltage harmonic measurement accuracy: ±(reading × 10%); Reference voltage channel input resistance: ≥1800kΩ
- Battery continuous working time: Over 8 hours
Battery charging time: Over 2 hours - AC charging: AC 220V 10%, 50Hz 1%
Instrument weight: 3.3kg (excluding cable box) - Instrument dimensions: 34cm × 22cm × 20cm
Operating Instructions
1. Upon powering on, the system enters the initial interface, as shown in Figure 2.
2. After about 6 seconds, the instrument starts up and enters the function selection interface, as shown in Figure 3.
A. If a three-phase test is required, please use the stylus or your finger to tap the three-phase surge arrester live-line test icon.
B. If a single-phase rapid test is required, please use the stylus or your finger to tap the single-phase surge arrester live-line test icon.
3. Clicking the single-phase surge arrester live-line test icon will bring up the single-phase test settings interface, as shown in Figure 4 (single-phase settings interface).
A. To modify the compensation angle, voltage level, pt ratio, or system frequency, simply use the stylus or your finger to tap the corresponding data. A small keyboard will pop up on the screen for modification. See Figure 5 for the data modification interface.
A. Simply enter the data, such as 110.0, and press the OK button. If you don’t need to modify the data, press the ESC key to return to the initial screen.
B. To change the PT mode, simply use the stylus or your finger to press the corresponding option, and a drop-down menu will appear.
4. After setup, click the “Start Instrument Test” icon to display the single-phase test interface, as shown in Figure 6 (Single-phase Test Interface).
After testing the data, click the pause button to record or save the data. Once finished, click the continue button to continue the test.
After the test is complete, click the exit button to return to the function selection interface shown in Figure 3.
Note: When testing a single-phase surge arrester, only use the A-phase current and A-phase voltage paths. That is, only use the yellow and black clips and terminals. The green B-phase and red C-phase clips and terminals should be left unconnected.
5. In the function selection interface shown in Figure 3, click the three-phase surge arrester live test icon to display the three-phase setting interface shown in Figure 7.
A. To modify the compensation angle, voltage level, PT ratio, or system frequency, simply use the stylus or your finger to tap the corresponding data. A small keyboard will pop up on the screen for modification. See Figure 8 for the data modification interface.
Simply enter the data, such as 110.0, and press the OK button.
If you don’t need to modify the data, press the ESC key to return to the initial interface.
B. To modify the PT mode, select 1PT, edge phase compensation, and print settings. Simply use the stylus or your finger to press the corresponding option, and a drop-down menu will appear. See Figure 9 for the settings modification interface.
Figure 9: Modify settings interface
