NDGM-20kV Adjustable High Voltage Digital Megohmmeter

Product Introduction

        NDGM-20kV Adjustable High Voltage Digital Megohmmeter features high test voltage and high power. The measured object often carries power frequency leakage or induced high voltage interference energy. Therefore, for personal safety, be sure to connect the safety ground wire when using this instrument! After the high voltage is activated, do not use manual discharge to check the instrument. After testing, wait for the instrument to automatically discharge until the voltmeter returns to zero before performing routine manual discharge for safety requirements! Because the strong electrical pulse wave of short-circuit discharge can damage the insulation life of the measured object, and if the pulse intrudes into the instrument, it can also damage the integrated circuits inside the instrument! The NDGM-20kV Adjustable Digital Megohmmeter Test is designed and developed to solve the problem of testing the insulation resistance characteristics of large high-voltage transformers, electrical motors, remote power cables, or buried cables under strong interference at high-voltage substations and power plants. It can also be used for measuring the electrical insulation resistance characteristics in a wide range of fields.

Product Features

☆、Strong Anti-Interference Ability: Anti-electric field induction interference capability reaches 2mA (50Hz), known to adapt to on-site measurements of 500kV large transformers in 500kV substations without disconnecting wires.
☆、Large Short-Circuit Current: Typical short-circuit current is 10mA, suitable for testing large-capacity and high-inductance objects.
☆、Wide Resistance Measurement Range: Measurement range from 0.01MΩ to 1999GΩ, with accurate readings and high resolution.
☆、Wide High Voltage Output Range: Optional voltages of 1kV, 2.5kV, 5kV, 10kV, 15kV, 20kV, or smoothly adjustable from 0V to the required voltage.
☆、Audible and Visual Alerts: Features a timing alarm function to remind users to record and analyze the absorption ratio and polarization index of the measured object.
☆、High Quality: Key components are all imported, ensuring accurate measurement precision.
☆、User-Friendly: Adopts an integrated chassis, compact size, lightweight, and easy to carry.
☆、Elegant Appearance: Uses sturdy and wear-resistant materials, enhancing the overall texture and extending the service life of the instrument.

Technical Parameters

☆、Test Voltage Levels: 1kV, 2.5kV, 5kV, 10kV, 15kV, 20kV
☆、Test Voltage Accuracy: ±(5% + 10V)
☆、Short-Circuit Current: Typical value 10mA
☆、Range and Accuracy
☆、Anti-Electric Field Interference Capability: 2mA (50/60Hz).
☆、Timing and Protection Functions: Stopwatch display value up to 19 minutes 59 seconds, 20-minute cycle, audible alerts at 15 seconds, 60 seconds, and every minute, with a short beep at the point, resistance reading held for 3 seconds. When the measured resistance is below the lower limit of the range and the reading is invalid, a continuous sound prompts.
☆、Display Meters: Three three-and-a-half-digit LCD digital meters, displaying test voltage, resistance, and time respectively.
☆、Power Supply: Equipped with 10 internal 1.2V/2000mAh Ni-MH rechargeable batteries, providing DC 12V power. Includes an AC (50/60Hz) 220V input port for battery charging or float charging operation.
☆、Operating Environment: Temperature: -20℃ to +40℃, Relative Humidity: 20% to 90%
☆、Dimensions: 315mm x 240mm x 180mm
☆、Weight: 5.5kg