NDRQ-H Fully Automatic Capacitance Bridge Tester

Product Introduction

       With the development of China's power industry, capacitor compensation devices have experienced unprecedented growth. However, this has been accompanied by a significant increase in capacitor accident rates, including serious group injury incidents. To prevent accidents involving shunt capacitors and ensure the safe and reliable operation of the power grid, the State Grid Corporation has formulated the "Measures to Prevent Accidents in High-Voltage Shunt Capacitors".

       It explicitly states the need to "regularly measure the capacitance of individual capacitors in capacitor banks, recommending the use of measurement methods without disconnecting wiring to avoid faults such as bushing oil leakage caused by stress during disassembly and assembly of connections."
        This instrument is designed to address issues encountered during on-site measurement of high-voltage shunt capacitor banks in substations. It is developed in accordance with national standards such as GB3983.2-1989 "High-Voltage Shunt Capacitors" and DL/T840-2003 "Technical Conditions for the Use of High-Voltage Shunt Capacitors", primarily for measuring high-voltage shunt capacitor banks in reactive power compensation devices.
       The instrument utilizes a new generation of high-speed hybrid microprocessors, highly integrated, to synchronously collect voltage and current signals from the test object, automatically calculating capacitance values, reactive power, and other parameters. On-site capacitor measurement does not require disconnecting wiring, simplifying the testing process, effectively improving work efficiency, and avoiding damage to power equipment. After testing, it automatically calculates the capacitance value per phase, total capacitance value, and other parameters, making it easy to determine quality changes in capacitors and connection conductor faults between components. Additionally, the instrument features data storage and USB communication functions, eliminating the need for on-site data transcription and ensuring the integrity of measurement data.

Product Features

☆、No-Disconnection Testing: The instrument is equipped with high-current, high-precision current clamps, allowing on-site capacitor measurement without disconnecting wiring, simplifying the testing process, effectively improving work efficiency, and avoiding damage to power equipment.
☆、High Intelligence: After three-phase testing is completed, it automatically calculates parameters such as capacitance value per phase, total capacitance value, and reactive power, making it simple and intuitive, reducing the burden on testers.
☆、Four-Terminal Measurement: Utilizes four-terminal measurement technology for accurate measurements and good test repeatability.
☆、Automatic Compensation: Current is automatically segmented and compensated, with full-range linearization, improving the measurement accuracy of the instrument.
☆、Storage Function: The instrument stores 400 data records and features historical data query capability.
☆、USB Communication: USB communication function, combined with PC software, enables data analysis, storage, printing, and generation of comprehensive test reports, facilitating centralized data management.
☆、Large Touchscreen: 7-inch large true-color touch LCD screen, with an intuitive interface and simple operation.
☆、Temperature Monitoring: Monitors ambient temperature, facilitating the recording of capacitor capacitance values at different temperatures.

Technical Parameters

☆、Capacitance Measurement Range and Accuracy
      Capacitance Measurement Range: 0.1uF～3300uF
      Accuracy: ±(Reading × 1% + 0.005uF)
      Resolution: 0.001uF
☆、Power Supply and Test Source
      Instrument Power Supply: AC 220V ±10%, 50Hz
      Output Voltage (Open Circuit): AC 23V ±10%, 50Hz (Capacitance)
      Output Current: ≤20A
       Output Short-Circuit Protection: Automatic
☆、Operating Conditions, Dimensions, and Instrument Weight
       Ambient Temperature: -10℃～+40℃      Relative Humidity: ≤90%
       Main Unit Volume: 400×290×175mm (L×W×H) Weight: 9.5kg
       Accessory Case Volume: 340×260×135mm (L×W×H) Weight: 3.6kg