(PD Testing)   Partial Discharge Testing| Test Precautions?

Partial Discharge Testing (PD Testing) / PD Partial Discharge Tester - Test Precautions and Features? PD Partial Discharge Tester Test Precautions and Core Features

I. Test Precautions

1. Safety and Grounding Assurance

• Ensure the test sample is completely de-energized, isolated, and reliably grounded. The tester main unit and sensors (such as HFCT, UHF) must follow the "single-point grounding" principle to avoid ground loop interference and ensure operational safety.

• Set up a warning line in the high-voltage test area. Unauthorized personnel are strictly prohibited from approaching to prevent the risk of electric shock.

2. Anti-interference Measures as a Priority

• On-site electromagnetic interference is a major challenge. Background noise must be measured before testing. Use shielded cables, power filters, or independent power supplies. If necessary, utilize the instrument's "time domain windowing" and "frequency filtering" functions to eliminate interference.

• Avoid operating in strong electromagnetic environments (such as near power transmission lines) to ensure signal purity.

3. Precise Sensor Installation and Calibration

• Select the appropriate sensor based on the sample type: high-frequency current transformers must be tightly secured to the grounding wire; ultrasonic sensors require coupling agent to ensure sound conduction; transient ground voltage sensors must be in close contact with the metal armor surface.

• Regularly calibrate sensor sensitivity to avoid data deviation.

4. Multidimensional Data Analysis

• Do not rely solely on the single parameter of "apparent discharge quantity." It is necessary to combine discharge phase, repetition frequency, PRPD spectrum, etc., to distinguish discharge types (e.g., corona discharge, surface discharge) and assess defect severity.

II. Core Features

1. Multi-Technology Fusion Detection

• Integrates multiple detection methods such as pulse current method, ultra-high frequency method, and ultrasonic method. Improves the reliability of defect identification through cross-verification of electrical, acoustic, and electromagnetic signals.

2. Intelligent Diagnosis and Location

• Built-in AI algorithm automatically generates PRPD/PRPS spectrum and intelligently identifies discharge types; supports multi-sensor time-difference positioning method for accurate location of the discharge source.

3. High Sensitivity and Portable Design

• Detection sensitivity reaches the petabyte level, capturing early, weak discharges; the device is lightweight and portable, supports battery power, and is suitable for on-site inspections in substations, cable tunnels, etc.

Summary: Partial discharge (PD) testers are key tools for insulation condition diagnosis. Their value lies in achieving accurate detection, identification, and location of partial discharges in complex field environments through multi-technology fusion and intelligent analysis, providing core evidence for equipment insulation condition assessment and risk warning. The MSJF-3003BPD partial discharge tester, acoustic infrared version, utilizes microphone array technology to collect acoustic wave data, combined with a high-definition camera to achieve acoustic wave localization. Beamforming is used to analyze the acoustic wave localization technology to obtain acoustic wave distribution data, which is then fused with video to generate an acoustic cloud map and dynamically displayed on the screen.

This device can be widely used for partial discharge detection in power systems, including insulation status testing of high-voltage switchgear, ring main units, voltage/current transformers, transformers (including dry-type transformers), GIS, overhead lines, cables, and other equipment. It measures the degree of discharge in electrical equipment using the following indicators: Partial Discharge Intensity Detection: By measuring the discharge signal within one power frequency cycle, the intensity of the partial discharge is characterized by the maximum value (dB) in the discharge pulse sequence.

◇ Product Features

The acoustic imaging module is developed to suit various applications such as power system inspection robots, drones, and online monitoring, and can adapt to multiple situations. Once a gas leak occurs, the acoustic imaging module can sense the ultrasonic waves/sound waves generated during the leak, thereby locating the leak location and triggering an alarm.

This function is based on acoustic imaging technology, using a microphone array to scan spatial sound waves. The fault location is determined by the phase difference of the sound waves, resulting in an "acoustic image."

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