It is a special instrument used to detect the electrical performance of zinc oxide lightning arresters. This instrument is suitable for live or outage detection of zinc oxide lightning arresters of various voltage levels, thereby timely discovering dangerous defects such as internal insulation dampness and valve plate aging.
The instrument is simple to operate and convenient to use. The entire measurement process is controlled by a single-chip microcomputer. It can measure the total current, resistive current and its harmonics, power frequency reference voltage and its harmonics, active power, and phase difference of zinc oxide lightning arresters. The large screen can display the real waveforms of voltage and current. The instrument uses digital waveform analysis technology, adopting software anti-interference methods such as harmonic analysis and digital filtering to make measurement results accurate and stable. It can accurately analyze the content of the fundamental wave and 3rd to 7th harmonics, and can overcome the influence of inter-phase interference to correctly measure the resistive current of side-phase arresters. This machine is equipped with a high-speed panel printer and rechargeable battery, making it very convenient for testers to use on site. The instrument uses a unique high-speed magnetic isolation digital sensor to directly collect input voltage and current signals, ensuring data reliability and safety.
Three-Phase Single-Phase Zinc Oxide Lightning Arrester Comprehensive TesterProduct Features:
1. This machine adopts a large-screen liquid crystal display with full Chinese menu operation, making it easy to use.
2. High-precision sampling and processing circuits, advanced Fourier harmonic analysis technology, ensuring more reliable data.
3. The instrument uses a unique high-speed magnetic isolation digital sensor to directly collect input voltage and current signals, ensuring data reliability and safety.
4. This instrument can use the electric field induction method instead of PT secondary wiring.
5. Supports non-synchronous voltage sampling mode.
6. This instrument can measure three phases simultaneously with automatic compensation, making it especially convenient to use.
7. It has functions such as resistive current fundamental peak output and side-phase correction.
8. The instrument is equipped with a rechargeable battery, calendar clock, and micro printer, and can store 120 sets of measurement data.
Technical Parameters:
◆ Total current measurement
Range: 0-20mA
Effective value: 50Hz/60Hz
Accuracy: ±(reading × 5% + 5μA)
◆ Resistive current
Fundamental wave measurement accuracy (secondary method excluding inter-phase interference): ±(reading × 5% + 5μA)
Current harmonic accuracy: ±(reading × 10% + 10μA)
◆ Reference voltage
Input range: 25V-250V (effective value)
Total harmonic content < 30% 50Hz/60Hz
◆ Reference voltage measurement accuracy: ±(reading × 5% + 0.5V)
◆ Voltage harmonic measurement accuracy: ±(reading × 10%)
◆ Angle between fundamental current and fundamental voltage: 0-360°
◆ Battery working time: 6 hours for the main unit
◆ Charging power supply: 220V ± 10% 50Hz/60Hz
◆ Charging time: 5 hours
◆ Working environment:
Temperature: -10-50℃
Humidity: < 90%
Precautions:
1. When taking the reference voltage from the PT secondary side, carefully check the wiring to avoid a short circuit in the PT secondary.
2. Do not reverse the voltage signal input line and the current signal input line. If the current signal input line is connected to the PT secondary side or the test transformer measurement terminal, the instrument may be burned out.
3. Do not plug or unplug the measurement cables when there is input voltage and current, to avoid burning the instrument.
4. If the instrument is damaged, stop using it immediately and notify our company. Do not open the case for repair by yourself. If the instrument does not work properly, first check whether the power fuse is blown. Replace with a fuse of the same model before continuing the experiment. If the problem is more complex, please contact our company directly.
5. Do not place the instrument in a humid or excessively high-temperature environment.
6. When taking the reference voltage from the PT or the test transformer measurement terminal, carefully check the wiring to avoid a short circuit in the PT secondary or test voltage.
7. During wiring, be careful not to connect the current and voltage sampling lines incorrectly.
