Table of Contents

Product Introduction

With the development of China’s power industry, capacitor compensation devices have been widely deployed. Meanwhile, capacitor failures have increased sharply, including severe group explosion accidents. To prevent faults of shunt capacitors and ensure safe and reliable grid operation, State Grid issued Measures for Preventing Accidents of High-Voltage Shunt Capacitors. It clearly requires regular capacitance measurement for individual capacitors within capacitor banks and recommends non-disconnect testing to avoid bushing oil leakage caused by wiring disassembly.

Developed to solve difficulties in measuring high-voltage shunt capacitor banks in substations, this instrument complies with standards GB3983.2-1989 and DL/T840-2003. It is designed for measuring high-voltage shunt capacitor banks of reactive power compensation equipment.

Adopting a new generation high-speed hybrid microprocessor with high integration, it synchronously collects voltage and current signals of tested samples and automatically calculates capacitance and reactive power. Capacitors can be measured without disconnecting wiring, simplifying testing procedures, improving efficiency and preventing damage to power equipment. After testing, it automatically calculates phase capacitance, total capacitance and other parameters for easy identification of capacitor degradation and poor connection faults. It supports data storage and USB communication to avoid manual recording errors and guarantee complete measurement records.

Alternative Names: Power Capacitance Tester, Capacitor Tester, Capacitance Bridge, Digital Capacitance Bridge Tester, Automatic Capacitance & Inductance Tester, Distribution Network Capacitance Bridge Tester

Technical Parameters

Category	Item	Specification
Measuring Range & Accuracy	Capacitance measuring range	0.1 μF ~ 3300 μF
	Accuracy	±(1% reading + 0.005 μF)
	Resolution	0.001 μF
Power Supply & Test Source	Instrument power supply	AC 220V±10%, 50 Hz
	Open-circuit output voltage	AC 23V±10%, 50 Hz (capacitance test)
	Max output current	20 A
	Output short-circuit protection	Automatic
Operating Conditions, Dimensions & Weight	Ambient temperature	-10℃ ~ +40℃
	Relative humidity	≤90%
	Main unit size (L×W×H)	400×290×175 mm
	Main unit weight	9.5 kg
	Accessory case size (L×W×H)	340×260×135 mm
	Accessory case weight	3.6 kg

Product Characteristics

Non-disconnect testing: Equipped with high-current high-precision current clamps. No need to disconnect capacitor wiring to simplify tests and protect power assets.
High intelligence: Automatically calculates phase capacitance, total capacitance, reactive power and other parameters after three-phase measurement, reducing workload for technicians.
Four-terminal measurement technology ensures high accuracy and excellent repeatability.
Automatic current compensation: Linearizes full current range to improve measuring precision.
Data storage: Stores up to 400 records with historical data query function.
USB communication: Connect to PC software for data analysis, storage, printing and test report generation to facilitate centralized data management.
7-inch large touch screen with true-color LCD, intuitive interface and simple operation.
Ambient temperature monitoring: Records capacitance values under different temperatures for reference analysis.

FAQ for Capacitance Bridge Tester

Q1: What is the Capacitance Bridge Tester used for?

A: It measures capacitance of high-voltage shunt capacitor banks. It enables non-disconnect on-site testing to check capacitor performance and identify poor connection faults for power substations.

Q2: Does it require disconnecting capacitor wiring before testing?

A: No. Equipped with high-precision current clamps, it supports live non-disconnect measurement, simplifies testing and avoids damage to equipment caused by wiring disassembly.

Q3: What is the capacitance measuring range?

A: Measuring range: 0.1 μF ~ 3300 μF, accuracy ±(1% reading + 0.005 μF), resolution up to 0.001 μF.

Q4: What measurement technology does it adopt?

A: It adopts four-terminal measurement technology with automatic current compensation, realizing full-range linearization and guaranteeing high accuracy and repeatability.

Q5: Can the instrument calculate multiple electrical parameters automatically?

A: Yes. After three-phase testing, it automatically computes phase capacitance, total capacitance, reactive power and other parameters for direct evaluation.

Q6: What data storage and export functions are available?

A: It can store up to 400 groups of test data. Via USB communication, users can connect with PC software to analyze data and generate formal test reports.

Q7: What kind of display screen is equipped?

A: 7-inch true-color touch LCD screen, intuitive graphical interface and easy operation for field technicians.

Q8: What power supply does the tester need?

A: Input power supply: AC 220V±10%, 50 Hz; test open-circuit output voltage AC 23V±10%, max output current 20 A with automatic short-circuit protection.

Q9: What is the applicable working environment?

A: Operating temperature: -10℃ ~ +40℃, relative humidity ≤90%. It also monitors ambient temperature to record capacitance variation under different temperatures.

Q10: What are the typical application scenarios?

A: Widely used for regular inspection and commissioning of reactive compensation capacitor banks in power plants, distribution substations and industrial power systems.

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