HYG-III zinc oxide arrester live tester is used to test the electrical performance of zinc oxide arrester (MOA). The instrument is suitable for live detection of zinc oxide arresters of various voltage levels and factory and acceptance tests made by laboratories under power failure. By measuring the parameters of total current and resistive current, dangerous defects such as dampness of insulation and aging of valve sheet in zinc oxide arrester can be found in time.

1. Reference Voltage Measurement

Reference voltage input range: 25V-250V RMS, 50Hz/60Hz

Reference Voltage Measurement Accuracy: +(Reading *2%+0.5V)

Accuracy of Voltage Harmonic Measurement: +(Reading x 10%)

Reference voltage channel input resistance: > 1500k

2. Current measurement

Full current measurement range: 0-10mA RMS, 50Hz/60Hz

Accuracy: (+5%+5uA)

Accuracy of fundamental wave measurement of resistive current: +(reading *5%+5uA)

Accuracy of current harmonic measurement: (+10%+10uA)

Current Channel Input Resistance: <2

3. Conditions of use and shape

Working power supply: built-in lithium battery or external charger, charger input 100-240VAC, 50Hz/60Hz

Charging time: about 4 hours

Battery working hours: 8 hours for main engine and 8 hours for Voltage Collector

Host Size: 320mm (Long)*270mm (Wide)*150mm (High)

Main engine weight: 3.2kg (excluding cables)

Voltage collector size: 115 mm (long)x 120 mm (wide)x 65 mm (high)

Voltage collector weight: 0.6kg (excluding cables)

Use temperature: - 10 ~50 C

Relative humidity: <90%, no dew

A high performance and low power ARM processor with DSP floating-point processing unit is adopted, which has faster operation speed, higher operation precision and larger data processing capacity. Thus, the accuracy and stability of test data calculation can be guaranteed.

High precision sampling filter circuit and digital filter technology can filter out the field interference signal.

Floating-point fast Fourier algorithm is used to realize high-precision analysis of fundamental wave, harmonic voltage and current signals.

The industrial grade 5.7 inch 320 x 240 dot matrix LCD screen is adopted, which has clear display and friendly man-machine interface. For some important operation and parameter settings, the prompt information and help description are displayed. The top status bar of the screen can display the working status and test status information of each peripheral device.

It can measure the electrical parameters of three-phase zinc oxide arrester at the same time and automatically compensate the inter-phase interference. It can also measure single-phase and support the secondary voltage of PT grounded in phase B as the reference voltage. When the measured phase is different from the reference voltage, the compensation angle can be calculated automatically.

It provides wired and wireless test mode, which is more convenient and flexible to operate, and can greatly reduce the work intensity of field testers.

Voltage collector integrates local display (128 x 64 dot matrix OLED LCD) and phase sequence detection function, which can display three-phase full voltage, voltage fundamental wave, three, five, seven harmonic RMS, system frequency and three-phase voltage phase difference. It is convenient for field testers to quickly check the connection between voltage collector and PT secondary voltage output terminal and the parameters of three-phase voltage.

The voltage collector adopts double full digital isolation technology, which is more secure and reliable.

AC and DC dual-purpose: built-in lithium battery power supply or 220V AC charger power supply adaptive.

The instrument mainframe and voltage collector are equipped with large capacity rechargeable lithium batteries, which can be charged once and work for 8 hours.

Intelligent power management: residual power display, low power alarm, long idle reminder, backlight automatic adjustment.

Built-in real-time clock, real-time display of the current time and date; automatic recording of test date and time.

Test data storage mode is divided into local storage and preferred disk storage, which can store 100 test data, and local storage can be transferred to preferred disk; preferred disk storage can save test data and waveform pictures, test data is in TXT format, waveform pictures are in BMP format, and can be edited and printed directly on the computer.

Built-in thermal printer, can print test data and saved test records; print content can be selected, thus saving the amount of printing paper.