Our company has developed a capacitive current test instrument based on the previous generation of test instruments based on PT secondary side injection signal method after re- and development. The new hardware structure and faster ARM processor and AD converter are used, and the built-in new digital frequency converter inverter power supply has high efficiency, low heat, small size and light weight, which is more convenient to carry and test on site. It can accurately measure the zero-sequence 3U0 voltage at different times (including the measurement process), so that users can judge the system operation status; and during the test, if the zero-sequence 3U0 voltage is too high, it can stop the measurement process.

The test instrument uses an industrial color LCD screen (readable in strong light), Chinese menu, and more friendly human-machine interaction, and has functions of U disk storage and data printing. Simple wiring, fast testing speed, high stability and accuracy of test data, which reduces the labor intensity of the test personnel and improves the efficiency.

Function and characteristics
The measuring range is wider and the testing speed is faster.
Support 3PT connection mode, two PT connection modes, 1PT connection mode on-site capacitive current measurement.
Industrial-grade color LCD display, resolution 320×240 dot, readable in strong light.
The man-machine interface is more friendly:
(1) For some important operations and parameter settings, display its prompt information and help description.(2) The measurement results and related parameters are displayed and printed more detailed, which is convenient for users to analyze later.
(3) When selecting PT connection mode, it display the wiring schematic diagram under various PT connection modes, which is convenient for users to judge the on-site PT connection mode and the connection position of the test line.
() The status bar at the top of the screen displays the USB flash drive insertion status in real time, and displays the corresponding unconnected prompt information when operating on a device that not connected.

 

Real-time measurement and display of zero sequence 3U0 voltage value, which is convenient for users to judge the system working status;, in the measurement project, if the zero sequence 3U0 voltage is too high, the measurement process can be stopped automatically.
Equipped with multiple zero sequence 30 overvoltage protection circuits, the test instrument output end can withstand AC100V 50HZ voltage without damage.
Equipped with a fully digital frequency conversionverter power supply, it has the characteristics of accurate output frequency, adjustable output current, high output efficiency, low heat generation, small size, light weight, and long-term stable.
Equipped with output short circuit protection function.
Equipped with a real-time clock, it can display the current time and date in real time; the measurement results the measurement date and time.
The measurement data storage method is divided into local storage and USB storage, where the local storage can store 150 measurement data, and the storage can be transferred to a USB flash drive; the USB storage data format is Word format, which can be directly edited and printed on a computer.
Thermal printing machine function, fast, silent.
Small size, light weight, easy to carry and use.

Technical indicators
Capacitive current measurement
Measurement range: 0.3μF～200μF 1A～00A
Accuracy: ±(reading × 5%   2 digits)
Resolution: 0.3～9.999 (0.01); 10～99.99 (0.01); 100～999.9 (0.1); ≥100 (1)
Voltage level: 0.1KV～99.9KV continuously adjustable
Zero-sequence 3U0 voltage measurement
ment range: 1V～100V AC 50HZ
Accuracy: ±(reading × 1%   10 digits)
Res: 1～9.999 (0.001) 10～99.99 (0.01)
Operating conditions and
Working power supply: AC100-240VAC 0.8A, 50/60Hz
Instrument weight: 4.Kg
Instrument volume: 320mm(length) × 270mm(width) × 150mm(height)
Operating temperature: -10℃～50℃
Relative humidity: <90%, no dew point