NDBX-III Transformer Winding Deformation Tester (Frequency Response Method + Impedance Method)

Product Introduction

       Transformer Winding Deformation Tester incorporates two testing methods: frequency response method and low-voltage short-circuit impedance method. By applying these two different approaches to measure power transformer windings, it comprehensively reflects the winding characteristics of the transformer and enables more accurate analysis and diagnosis of winding deformation. The perfect integration of frequency response and impedance methods saves testing time and improves work efficiency.

Product Features

☆、The frequency response method uses sweep frequency technique to measure transformer winding characteristics. Without the need for disassembling the transformer tank, it accurately detects winding deformations such as distortion, bulging, or displacement for transformers rated 6kV and above by analyzing the amplitude-frequency response characteristics of each winding.

☆、Both frequency response and impedance methods support three-phase automatic testing, significantly reducing testing time. Fast measurement speed allows testing of a single winding within 1-2 minutes.

☆、The frequency response method offers extremely high frequency precision, with accuracy better than 0.001%.

☆、The frequency response method employs digital frequency synthesis for enhanced frequency stability.

☆、The frequency response method utilizes 5000V voltage isolation to fully protect the testing computer's safety.

☆、The frequency response method can simultaneously load 9 curves, with automatic calculation of relevant parameters for each curve. It automatically diagnoses winding deformation and provides diagnostic reference conclusions.

☆、The frequency response method features powerful analysis software, with both software and hardware specifications meeting DL/T911-2016 standards.

☆、The short-circuit impedance method performs three-phase automatic testing. Without requiring an external voltage regulator, it uses standard AC220V low-voltage power to automatically apply voltage to the AB, BC, and CA high-voltage windings of the transformer, synchronously collects data, and automatically calculates impedance error percentage, making test results highly intuitive.

☆、The short-circuit impedance method is suitable for impedance testing of transformers of any capacity.

☆、During short-circuit impedance testing, waveform diagrams of test current and test voltage are displayed, facilitating real-time monitoring of test conditions.

☆、The short-circuit impedance method includes inductance measurement capability.

☆、Short-circuit impedance method includes zero-sequence impedance measurement capability for transformers.

☆、Runs on Windows platform, compatible with Windows 2000/Windows XP/Windows 7/Windows 8.

☆、Uses database to save test data, making test data management simple and convenient.

☆、Software features powerful management functions, fully considering field application needs. Measurement data is automatically saved and can be exported to generate Word test reports (requires corresponding Office software installation) or JPG image reports, facilitating user report generation.

☆、High software intelligence level - after connecting input and output signals, simply press one key to complete all measurement tasks.

☆、Software interface is simple and intuitive. Analysis, storage, report export, and print menus automatically pop up sequentially as each step is completed, providing enhanced convenience.

Technical Parameters

☆、Measurement methods: Frequency response method and impedance method both support three-phase automatic testing

☆、Output voltage: Vpp-25V, automatically adjusted during testing

☆、Output impedance: 50Ω

☆、Input impedance: 1MΩ (response channel has built-in 50Ω matching resistance)

☆、Sweep frequency range: 10Hz－2MHz

☆、Frequency accuracy: 0.001%

☆、Sweep modes: Linear or logarithmic, sweep interval and points can be arbitrarily set

☆、Curve display: Amplitude-frequency curve

☆、Wide measurement dynamic range: －120dB～20dB

☆、Power supply voltage: AC220V±10%

☆、Impedance method test voltage: 0～220V

☆、Impedance method test current: 0～10A

☆、Impedance method frequency: 50Hz/60Hz

☆、Dual-method main unit weight: 7.8 kg

☆、Dual-method main unit dimensions: 272mm*258mm*180mm