Product Introduction

       NDPT-Ⅲ Voltage Transformer Comprehensive Tester is a new generation of innovative PT testing instrument developed based on traditional comprehensive testers for mutual inductor volt-ampere characteristic, ratio, and polarity error analysis using voltage regulators, step-up transformers, and series resonance. It incorporates extensive user feedback, thorough market research, and in-depth theoretical studies. The device utilizes high-performance DSP+FPGA, advanced ARM industrial computer, and sophisticated manufacturing processes, ensuring stable and reliable performance, comprehensive functionality, high automation, and efficient testing. It leads the domestic market and is a professional testing instrument for mutual inductors in the power industry.

Product Features

☆、A single instrument can perform error testing for voltage transformers, eliminating the need for resonant step-up devices, standard voltage transformers, load boxes, calibrators, and other equipment, greatly reducing on-site calibration workload.
☆、Wide testing range, capable of testing electromagnetic voltage transformers with voltage levels from 6kV to 800kV.
☆、Internally uses a 0.01-class standard voltage transformer, employing the differential measurement method to test the low-voltage error of transformers. Uses heterodyne testing technology to convert the nonlinear error of PT at 50Hz, ultimately obtaining the transformer's error. The instrument's testing accuracy can reach 0.05 class. During testing, it generates a test voltage not exceeding 3kV, ensuring on-site safety.
☆、Simple test wiring and easy-to-learn operation; just follow the guided prompts to easily complete transformer calibration, significantly improving testing efficiency. Short testing time, less than 5 minutes.
☆、Uses precise software algorithms to further enhance measurement data accuracy. Intelligently judges external wiring conditions, alerts for wiring errors, ratio errors, polarity errors, etc.
☆、Automatically rounds test data and determines if it exceeds tolerance. Out-of-tolerance data is displayed in reverse black, providing intuitive clarity on transformer data characteristics.
☆、Large-scale memory can store up to 10,000 on-site test data records.
☆、Uses aluminum alloy chassis for excellent anti-interference and ensures operator and equipment safety during high-voltage field tests.
☆、Features high-resolution, large 8-inch true color LCD display, clear visibility in outdoor strong light, with touchscreen輔助 operation for simplicity and speed; fully Chinese display and operation, easy to understand.

Technical Parameters

☆、Testing purposes: PT excitation characteristics, ratio, polarity, secondary winding resistance, and other testing requirements.
☆、Power supply: 185V ~250V, 45Hz ~ 65Hz
      Power: 800VA
☆、PT ratio accuracy: 1 ~350 (0.03%), 350~1100 (0.05%), >1100 (0.07%)
      Phase measurement: 2min, resolution 0.01min
☆、Secondary winding range: 0Ω~500Ω
      Resolution: 1mΩ
      Accuracy: 0.5%+2mΩ
☆、Load range: 0VA~1000VA
      Resolution: 0.01VA
      Accuracy: 0.1%+0.01VA
☆、Output:
      High voltage output: 0~3000V
      Low voltage output: 0~120V 5Arms, current: 12A (peak) power: 600VA
☆、Environmental conditions:
      Operating temperature: -10℃~+50℃
      Storage temperature: -25℃~+70℃
      Relative humidity: 10%~95%, non-condensing
☆、Dimensions: 360mm × 290mm × 155mm
☆、Weight: 10kg (excluding accessories)