I.Overview
With the development of my country's electric power industry, the capacitor compensation device has achieved unprecedented development, but with it, the capacitor accident rate has risen sharply, and serious mass injury accidents have occurred. In order to prevent the occurrence of shunt capacitor accidents and ensure the safe and reliable operation of the power grid, the State Grid Corporation of China has formulated the "Measures for Preventing High Voltage Shunt Capacitor Accidents". It is clearly stated that "regularly measure the capacitance of a single capacitor in the capacitor bank, and it is recommended to use the measurement method without disconnecting the connecting wire to avoid the failure of the casing oil leakage due to the stress on the casing caused by the disassembly and assembly of the connecting wire".
This instrument is designed for the problems existing in the measurement of high-voltage shunt capacitor banks in substations, and refers to GB3983.2-1989 "High-voltage shunt capacitors", DL/T840-2003 "Technical conditions for the use of high-voltage shunt capacitors" and JB5346-1998 " It is specially developed according to national standards such as "Series Reactors", mainly for the measurement of high-voltage parallel capacitor banks and reactors of reactive power compensation devices.
The instrument adopts a high-speed microprocessor, synchronously collects the voltage signal and current signal of the tested object, and automatically calculates the capacitance value, inductance value and other values. It is not necessary to remove the connecting wire for on-site measurement of capacitors, which simplifies the test process and effectively improves work efficiency. After the test, the capacity of each phase capacitor and other parameters are automatically calculated, and it is easy to determine the quality change of the capacitor and the fault of the connecting conductor between the devices.
II.Features
The instrument can measure the single capacitance of a group of parallel capacitors (both single-phase capacitance and three-phase capacitance can be measured) without removing the wires use.
During the measurement, the instrument can display the measured capacitance value or inductance value, and can also display the measured voltage, current, frequency, impedance, phase angle and other data;
The instrument uses different frequency power output for testing, which greatly improves the anti-interference ability on site, and can test in high-intensity magnetic field without affecting the accuracy.
The instrument adopts a 7.0-inch 1024×600 high-definition screen, touch operation, clear observation during the day and night, Chinese menu prompts, easy to operate.
The instrument uses different frequency power output for testing, which greatly improves the anti-interference ability on site, and can test in high-intensity magnetic field without affecting the accuracy.
The instrument has built-in large-capacity non-volatile memory: it can store 500 sets of measurement data.
The instrument is equipped with a U disk interface, which can store any group of measurement data (limited by the capacity of the U disk).
The instrument has a built-in high-precision real-time clock function, which can perform date and time calibration.
The instrument has a built-in lithium battery power supply, which is convenient for outdoor use.
The instrument can be equipped with a printer to print the measurement data.
III.Technical indicators
1、Test voltage：
AC 100V ±10%，55Hz
AC 40V±10%，55Hz
AC 8V±10%，55Hz
AC 2V±10%， 55Hz
2、Measuring range and accuracy:
Measurable capacitance range: 0.1uF～10000uF ±（reading 1%+0.01uF）
Measurable inductance range: 50uH ～20H ±(reading 3%+0.05uH)
Measurable current range: 5mA ～2A ±(reading 3%+0.05mA)
Measurable resistance range: 20mΩ～20kΩ ±(reading 3%+0.1mΩ)
3、Length of test line: standard 5 meters, the length can be customized
4、Dimensions: Host 252*160*65(mm) Box: 425*335*210(mm)
5、Weight：Host：2KG Box：8KG
IV.Conditions of use
Ambient temperature :-20℃～40℃
Ambient humidity :≤85%RH