NDJS Anti-Interference Dielectric Loss Tester

Product Introduction

   The Anti-interference Dielectric Loss Tester is a high-precision instrument used in power plants, substations, and other sites for fully automatic measurement of the dielectric loss tangent (tanδ) and capacitance of various high-voltage electrical equipment. The use of frequency conversion technology ensures accurate measurements even under strong electromagnetic interference.

   The instrument features a Chinese menu interface, and the microcomputer automatically completes the entire measurement process.

   This instrument is also suitable for workshops, laboratories, and research institutions to measure the tanδ and capacitance of high-voltage electrical equipment. It offers convenience, simplicity, and accuracy for testing the dielectric loss of insulating oil.

   The instrument can measure ungrounded or directly grounded high-voltage electrical equipment using both forward and reverse wiring methods. It can also measure the tanδ and capacitance of the main capacitors C1 and C2 of capacitive voltage transformers (CVT).

   The instrument is equipped with an internal high-voltage step-up transformer and incorporates safety measures such as zero-crossing closing and lightning protection. It outputs high voltages ranging from 0.5 kV to 10 kV during testing, ensuring simple and safe operation.

   This instrument includes the following protection functions:

    High-voltage short-circuit protection

    CVT overvoltage protection

    Poor grounding protection

Product Features

☆、Capable of self-excitation method testing for CVT, with a single wiring connection to simultaneously measure the capacitance and tanδ of C1 and C2.

☆、Features external voltage application and external CN measurement functions.

☆、High measurement accuracy meets the requirements for oil dielectric loss testing. With a standard oil cup and dedicated test leads, it can easily perform oil dielectric loss measurements.

☆、Utilizes frequency conversion technology to eliminate on-site 50Hz power frequency interference, ensuring reliable data even in environments with strong electromagnetic interference.

☆、Grounding protection function: if the instrument is not grounded or poorly grounded, it will not enter the normal program and will not output high voltage.

☆、Overcurrent protection function: protects the instrument from damage in case of sample short-circuit or breakdown.

☆、Built-in standard capacitor and high-voltage power supply for convenient on-site testing and reduced wiring.

☆、Equipped with a large-screen LCD display, the testing process is guided by Chinese menu prompts, making it intuitive and easy to operate.

Product Parameters

☆、High-voltage output: 0.5 to 10 kV

            Increments of 500V per step, 10 steps in total, capacity: 1500 VA

☆、Accuracy: tanδ: ±(reading * 1.5% + 0.08%)

            Cx: ±(reading * 1.5% + 5 pF)

☆、Resolution: tanδ: 0.01%    Cx: 1 pF

☆、Measurement range: 0.1% < tanδ < 50%

            3 pF < Cx < 60,000 pF

            At 10 kV, Cx ≤ 30,000 pF

            At 5 kV, Cx ≤ 60,000 pF

☆、Power supply: AC 220V ±10%, 50±1Hz

☆、Harmonic tolerance: ≤3%

☆、Operating conditions: -15℃ to 50℃, relative humidity <80%

☆、Dimensions: 460 (L) × 335 (W) × 340 (H) mm

☆、Weight: 30 kg