NDBPH-100D Variable Frequency Volt-Ampere Characteristic Tester

Product Introduction

       NDBPH-100D Variable Frequency Volt-Ampere Characteristic Tester is a new generation of innovative CT and PT testing instrument developed based on the traditional Comprehensive Tester for Transformer Volt-Ampere Characteristics, Ratio, and Polarity using voltage regulators, step-up transformers, and current boosters. It incorporates extensive user feedback, thorough market research, and in-depth theoretical studies. The device utilizes high-performance DSP and FPGA, along with advanced manufacturing processes, ensuring stable and reliable performance, comprehensive functionality, high automation, and high testing efficiency. It is a leading professional testing instrument for transformers in the power industry.

Product Features

☆、Comprehensive functionality, meeting the testing requirements for various CTs (e.g., protection, metering, TP types) including excitation characteristics (i.e., volt-ampere characteristics), ratio, polarity, secondary winding resistance, secondary load, ratio error, and phase angle error. It can also be used for testing excitation characteristics, ratio, polarity, secondary winding resistance, and ratio error of various PT electromagnetic units.

☆、On-site calibration of current transformers does not require standard current transformers, current boosters, load boxes, voltage regulation control boxes, or heavy-current cables. It uses extremely simple test wiring and operation to achieve current transformer calibration, greatly reducing work intensity and improving efficiency, facilitating on-site transformer calibration work.

☆、Capable of accurately measuring ratio error and phase angle error, with ratio error tolerance ≤±0.1% and phase angle error tolerance ≤±5min. It can perform on-site testing of 0.2S class current transformers, with a ratio measurement range of 1 to 40,000.

☆、Based on advanced frequency conversion method to test CT/PT volt-ampere characteristic curves and 10% error curves. It outputs 180V AC voltage and 12Arms (36A peak) AC current, yet can handle CT tests with knee points up to 60KV.

☆、Automatically provides knee point voltage/current, 10% (5%) error curves, accuracy limit factor (ALF), instrument security factor (FS), secondary time constant (Ts), remanence factor (Kr), saturated and unsaturated inductance, and other CT and PT parameters.

☆、Testing complies with various transformer standards such as GB1208 (IEC60044-1), GB16847 (IEC60044-6), and GB1207. It automatically selects the appropriate standard based on the transformer type and class.

☆、Simple and convenient testing, with one-key completion of CT direct resistance, excitation, ratio, and polarity tests. Except for load testing, all other CT tests use the same wiring method.

☆、Fully Chinese dynamic graphical interface, allowing completion of wiring and parameter settings without referring to the manual: dynamically displays parameter settings based on the currently selected test item; dynamically displays help wiring diagrams corresponding to the selected test item.

☆、5.7-inch graphic transmissive LCD, clearly visible in sunlight.

☆、Operated with a rotary optical mouse, making it simple, fast, convenient, and easy to master.

☆、Built-in printer on the panel for automatic printing of test reports.

☆、Test results can be saved via USB drive, and the program can be upgraded via USB drive, making it convenient and fast.

☆、The device can store 1000 sets of test data, which are not lost during power failure.

☆、Equipped with backend analysis software for easy saving, conversion, and analysis of test reports, enabling comparison, judgment, and evaluation of test data.

☆、Easy to carry, with a device weight of <9Kg.

Technical Parameters

☆、Testing purposes:
       CT: Excitation characteristics, ratio, polarity, secondary winding resistance, secondary load, current flow, ratio error, and phase angle error, etc.
       PT: Excitation characteristics, ratio, polarity, secondary winding resistance, etc.

☆、Power supply: 185V～250V, 45Hz～65Hz
      Power: 800VA

☆、CT ratio accuracy: 1～2000 (0.05%), 2000～5000 (0.1%), 5000～35000 (0.2%)
PT ratio accuracy: 1～2000 (0.05%), 2000～5000 (0.1%), 5000～35000 (0.2%)
       Phase measurement: 3min, resolution 0.01min
☆、Secondary winding range: 0Ω～300Ω
      Resolution: 1mΩ
      Accuracy: 0.1%+1mΩ
☆、Load range: 0VA～1000VA
      Resolution: 0.01VA
      Accuracy: 0.1%+0.01VA
☆、Current booster:
      Purpose: Current flow test
      Input: 0～120V
      Output: 0～180A
      Dimensions: 200mm × 150mm × 170mm
      Weight: 5kg
☆、Environmental conditions:
       Operating temperature: -10℃～+50℃
       Storage temperature: -25℃～+70℃
       Relative humidity: 10%～95%, non-condensing
☆、Dimensions: 360mm × 285mm × 145mm
☆、Weight: 8kg (excluding accessories)