Capacitance and Inductance Tester

With the rapid development of the power industry in our country, capacitor compensation devices have experienced unprecedented growth. However, this has also led to a significant increase in the failure rate of capacitors, including serious incidents resulting in multiple casualties.

To prevent accidents involving parallel capacitors 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 Parallel Capacitor Accidents. This document explicitly stipulates that "regular capacitance measurements of individual capacitors within capacitor banks shall be performed," and recommends "using measurement methods that do not require disconnecting connecting wires, in order to avoid bushing oil leakage caused by the mechanical stress from disconnection."

This instrument is designed specifically to address the challenges associated with measuring high-voltage parallel capacitor banks in substations. It has been developed in accordance with national standards, including:

•GB 3983.2-1989 High-Voltage Parallel Capacitors

•DL/T 840-2003 Technical Conditions for the Use of High-Voltage Parallel Capacitors

•JB 5346-1998 Series Reactors

Its primary application is the measurement of high-voltage parallel capacitor banks and reactors used in reactive power compensation devices.

The instrument utilizes a high-speed microprocessor to simultaneously sample the voltage and current signals of the test object, automatically calculating values such as capacitance and inductance. On-site capacitor measurements can be performed without disconnecting the connecting wires, significantly simplifying the testing process and improving work efficiency. Upon completion, the instrument automatically calculates parameters such as the capacitance of each phase, making it easy to identify changes in capacitor quality and faults in the connections between components.

This instrument can measure the individual capacitance of parallel-connected capacitor groups (both single-phase and three-phase capacitors can be measured) without disconnecting wires. It can also measure the inductance of various reactors, meeting diverse on-site needs.

During measurement, the instrument displays the measured capacitance or inductance value, as well as the measured voltage, current, frequency, impedance, phase angle, and other data. The instrument uses a variable frequency power supply output for testing, greatly improving its anti-interference capability and allowing testing in high-intensity magnetic fields without affecting accuracy.

The instrument features a 7.0-inch 1024×600 high-definition screen with touch operation, providing clear visibility day and night. It includes Chinese menu prompts for easy operation.

The instrument has a built-in large-capacity non-volatile memory that can store 500 sets of measurement data.

The instrument is equipped with a USB flash drive interface, which can store any set of measurement data (limited by the USB flash drive's capacity).

The instrument has a built-in high-precision real-time clock function, allowing for date and time calibration.

The instrument can be connected to an external printer to print measurement data.

The instrument has a built-in lithium battery power supply for convenient outdoor use.

Baoding Simaier Electric Co., Ltd. was established on July 1, 2009 and is located in the National High-tech Industrial Development Zone of Baoding City, Hebei Province. It is a high-tech enterprise focusing on the research and development of power system automation, relay protection and instrumentation.