Product Introduction

       NDDK-II Transformer Short-Circuit Impedance Tester is equipped with an internal adjustable power supply output, making it particularly suitable for on-site low-voltage short-circuit impedance measurement of 110kV and above main transformers.

        The main features of the instrument include: it comes with an adjustable power supply output; whether for single-phase or three-phase transformers, only one wiring is needed to complete the measurement of all winding pairs, making testing and wiring simple.

       The instrument adopts a single-phase measurement method. For three-phase transformers, the short-circuit impedance, reactance, and inductance values of each phase can be automatically calculated after three boosting processes.

Product Features

☆、The instrument uses phase-locked loop technology internally and samples AC signals synchronously, ensuring accurate measurement data.

☆、The instrument can measure voltage, current, power, frequency, etc.

☆、Wide voltage and current measurement range in standalone mode, supports external CT and PT to further extend the measurement range.

☆、Built-in non-volatile memory for long-term storage of measurement data; the instrument comes with a built-in printer.

☆、Test data can be imported into a computer for further analysis or storage.

☆、Fully Chinese menu and operation prompts, simple and intuitive operation.

☆、Transflective large-screen LCD, clearly visible under direct sunlight.

Technical Parameters

☆、Measurement accuracy: Voltage, current: Class 0.2

☆、Power: COSφ>0.1: Class 0.5; COSφ≤0.1: Class 1.0

☆、Impedance: COSφ>0.1: Class 0.5; COSφ≤0.1: Class 1.0

☆、Voltage measurement range: AC  3V～300V

☆、Internal power output range: Voltage 0~250V, current 0~10A

☆、Current measurement range: AC  0.2A～20A

☆、Operating temperature: -10℃～50℃

☆、Operating humidity: 0～80%

☆、Power supply: AC220V±10﹪?50Hz±1Hz

☆、Dimensions: 360mm×220mm×150mm

☆、Instrument weight: 5Kg