KDYZ-301 Zinc Oxide Surge Arrester Live Testing Instrument is a specialized instrument used to test the electrical performance of zinc oxide surge arresters. This instrument is suitable for live or power-off testing of zinc oxide surge arresters of various voltage levels. It is a specialized instrument used for testing the electrical performance of zinc oxide surge arresters in power plants, substations, and other sites or laboratories. The instrument can accurately and stably measure parameters such as the resistive current of the lightning arrester and the action of the monitor counter while the equipment is in operation, and can calibrate the ammeter of the monitor. In order to promptly detect dangerous defects such as moisture damage to the internal insulation of the equipment and aging of valve plates.

The instrument is easy to operate and use, and the entire measurement process is controlled by an industrial computer. It can measure the full current, resistive current and its harmonics, power frequency reference voltage and its harmonics, active power and phase difference of zinc oxide lightning arrester. The large screen can display the real waveforms of voltage and current. The instrument uses digital waveform analysis technology and anti-interference methods such as harmonic analysis and digital filtering software to ensure accurate and stable measurement results. It can accurately analyze the content of fundamental waves and 3-7th harmonics, and overcome the influence of phase to phase interference to correctly measure the resistive current of edge phase lightning arresters.

800 × 480 color LCD touch screen, high-speed thermal printer; Graphic and textual display, convenient for on-site personnel to operate and use.

Wireless transmission of PT signals over 400 meters, with on-demand configuration up to 2000 meters, can meet the needs of various experimental sites.

Suitable for use in places with live lightning arresters, power outages, or laboratories.

Multiple voltage reference signal sampling methods: It can meet the on-site live test of 6-35kV zinc oxide lightning arrester and can also be used for live operation of 35-750KV, with induction board and Bluetooth function

Wired synchronization: Take signals from the PT end measuring winding and transmit digital signals through wired communication.

Wireless synchronization: Take signals from the PT end measuring winding, transmit digital signals wirelessly, eliminating the need for long-distance cable connections.

Induction board synchronization: No signal needs to be taken from the PT terminal, voltage signal can be taken from the induction board installed on the B-phase base of the zinc oxide lightning arrester.

Voltage free synchronization: No signal needs to be taken from the PT terminal, and the voltage reference can be found through software calculation.

The isolation of voltage signals and current signals (input impedance below 1 Ω) ensures the reliability and safety of data.

Capable of simultaneously measuring three channel resistive currents and providing two anti-interference modes; ① No interference: In this mode, the instrument will not automatically correct the phase to phase interference angle during measurement; ② Interference: In this mode, the instrument will automatically calculate and correct the phase to phase interference angle during measurement, and only one wiring is needed to complete the measurement of ABC three phases simultaneously

Truly achieving simultaneous testing of three-phase current and three-phase voltage, automatic calculation without compensation, and improving work efficiency; The instrument only has weak electricity inside, with a voltage not exceeding 12V; Isolation of current and voltage sensors, safe and reliable.

Supports two voltage reference signal sampling methods: wired synchronization and wireless synchronization; It also supports no voltage mode, which can find the voltage reference through software calculation. It supports taking the three-phase or B-phase voltage reference as the voltage reference.

AC/DC dual-use type; Equipped with an efficient lithium-ion battery, it is particularly suitable for situations without power supply, and can work continuously for dozens of hours on a single charge.

Equipped with Windows operating system, supporting direct shutdown mode; Equipped with a USB interface that supports exporting data from a USB drive; Can be used with an external USB mouse and keyboard for easy operation.

The internal configuration of a 4GB SD card can store massive amounts of experimental data, with functions such as data management and storage.

Equipped with upper level management software, it has functions such as historical data management, data analysis, and survival Word report printing. It has built-in help documents and comes with wiring patterns. Under strong light, the background image and color can be adjusted, and interface screenshots can be saved as BMP images.

High speed sampling frequency, advanced digital signal processing technology, equipped with various testing functions such as lightning arrester resistive current testing, monitor current verification, and monitor action testing, with strong performance and high testing accuracy.

Adopting dust-proof, waterproof, and anti-corrosion engineering plastic sealing box, it has a small volume, light weight, and is easy to carry.

1. Power supply: AC220V ± 10%, 50Hz

DC12V internal battery power supply; Lithium battery capacity: 10000mAh

2. Current

Full current measurement range: 100uA~10mA effective value, 50Hz/60Hz

Accuracy: ± (reading x 5%+5uA)

Accuracy of fundamental measurement of resistive current (quadratic method without phase to phase interference): 100uA-10mA ± (reading × 5%+5uA)

Capacitive current measurement range (peak): 100uA-10mA ± (reading × 5%+5uA)

Accuracy of current harmonic measurement: ± (reading × 5%+5uA)

Current channel input resistance: ≤ 2 Ω

3. Reference voltage

PT reference voltage input range: 10V-200V effective value, 50Hz/60Hz

PT reference voltage measurement accuracy: ± (reading 2%+0.5V)

Accuracy of voltage harmonic measurement: ± (reading x 10%)

Reference voltage channel input resistance: ≥ 300k Ω

4. Electric field strength

Electric field strength input range: 30kV/m to 300kV/m

Accuracy of electric field strength measurement: ± (reading x 10%)

Accuracy of electric field harmonic measurement: ± (reading x 10%)

5. Measurement parameters: leakage current full current waveform, fundamental effective value, peak value.

The fundamental effective value and 3rd, 5th, and 7th effective values of the resistive component of leakage current.

Peak value of resistive component of leakage current: positive peak value Ir+negative peak value Ir -.

Fundamental wave of capacitive current, phase difference between full voltage and full current, effective voltage value, and power consumption of lightning arrester.

6. Sampling method for voltage reference signal:

Wired transmission: 40 meters (expandable) Wireless transmission: 400 meters (expandable)

Angle measurement range: 0 ° -360 °

Power consumption: 4W

7. Battery parameters: Charging time>6 hours, continuous working time>4 hours, intermittent working time>8 hours