Digital Ultrasonic Partial Discharge Detector (MRPD_AE2)

I. Product Introduction

The digital ultrasonic partial discharge detector is a scientific instrument that utilizes acoustic emission technology and fiber-optic transmission, specifically designed for studying partial discharges. Measurement results are fully digitized and directly correlated with the amplitude of the applied test voltage. It can be used in research experiments on partial discharges in oil-paper insulation and solid insulation systems, making it specially tailored for partial discharge testing of power capacitors. Additionally, this instrument is also suitable for factory acceptance tests of partial discharges in transformers, reactors, bushings, cable terminations, current and voltage transformers, GIS equipment, and other similar products—making it an indispensable tool for the transmission and distribution industry.

The digital ultrasonic partial discharge detector (MRPD_AE2) is a dual-channel instrument equipped with an electrical channel and an AE ultrasonic emission channel. This device allows for comparative measurements of both the test voltage and partial discharge parameters during discharge experiments, enabling qualitative, quantitative, and time-based analysis of the phenomena. Ultrasonic Partial Discharge Tester

II. Basic Functions

Able to record the experimental voltage and its waveform at every instant during the pressurization process;

It can record the magnitude of partial discharge pulses at each instantaneous voltage level.

III. Skill Parameters

Minimum detectable discharge quantity—no more than 10 picocoulombs (with the probe attached to the tank wall; a discharge source is placed in the oil inside the tank, 1 meter away from the probe. According to the IEC-recommended standard, this discharge quantity is set at 10 pC. The resulting acoustic pulse generated by the discharge reaches the tank wall and is detected by the probe, then displayed on the AE-PD instrument’s monitor (or peak meter). The amplitude of this pulse is defined as the acoustic equivalent of 10 pC, denoted as 10 pC*).

Frequency range—20 kHz to 200 kHz ±3 dB.

The length of the optical cable and its withstand voltage—Type 2S is equipped with one 10-meter-long multimode optical cable, each capable of withstanding a power-frequency voltage of 200 kV.

Display methods — The AE channel presents various plots such as PRPS, PRPD, discharge rate, Φ-Q-N, ellipse, Q-T, or N-T; the electrical channel displays curves.

Quantitative Method — Use peak readings.

Probe Structure—The probe is equipped with a permanent magnet suction cup and features magnetic levitation. The operating current is approximately 8 milliamps, and it supports USB charging: a 10-minute charge provides over 10 hours of usage. The probe houses a built-in 500mAh lithium battery, offering up to 60+ hours of continuous operation.