4-Channel Portable Partial Discharge Tester

Product Introduction

This instrument employs high-frequency detection technology to measure partial discharges. It integrates computer technology, ultrasonic technology, ultra-high frequency technology, transient earth-wave sampling technology, analog electronics, high-speed signal acquisition technology, and advanced digital signal processing technology. Developed on a Linux operating system platform, it provides two-dimensional and three-dimensional partial discharge spectra, amplitude-phase spectrum waveforms, and partial discharge signal quantification values. Through detailed observation and analysis of partial discharge pulse waveforms-either statically or dynamically over single or multiple cycles-it enables thorough evaluation of partial discharge characteristics. and phase spectrum waveforms, along with quantified discharge signal values. By conducting detailed observation and analysis of partial discharge pulse waveforms-either statically or dynamically across single or multiple cycles-it effectively evaluates partial discharge conditions in electrical equipment. Suitable for routine inspections of insulation performance in high-voltage cables, power transformers, and other electrical equipment, it features high sensitivity and strong adaptability. This instrument effectively detects related insulation defects, making it an ideal tool for condition monitoring during live operation of power equipment.

Product Parameter (specification)

2.1 Non-contact Ultrasonic Sensor (AA)
Sensor Center Frequency	40KHz±1KHz
Dynamic Measurement Range	60dB
Resolution	0.1dB
Linearity Error	<±20%
Sensor Form	Flexible Form/Focusing Element Form
2.2 Contact Ultrasonic Sensor (AE)
Detection Bandwidth	20KHz~80KHz (SF6 Gas-Insulated Power Equipment)
Detection Bandwidth	80KHz~200KHz (Oil-Filled Power Equipment)
Dynamic measurement range	60dB
Resolution	0.1dB
Linearity error	<±20%
2.3 Transient Earth Voltage Sensor (TEV)
Detection frequency band	3MHz~100MHz
Measurement range	0~60dBmV
Resolution	0.1dB
Linearity error	<±20%
2.4 Ultra-High Frequency Sensor (UHF)
Detection Bandwidth	300MHz~1500MHz
Measurement Range	-70dBm~-10dBm
Sensor Mean Effective Height	≥10mm
Resolution	0.1dBm
2.5 High-Frequency Sensor (HF)
Detection Bandwidth	0.3MHz to 30MHz
Measurement Range	0 to 70dB
Gain	-30 to 20dB
Resolution	0.1dB
Transmission Impedance	≥10mV/mA
Input Impedance	50Ω
2.6 System Specifications
Operating Environment	Temperature -20°C to 50°C, Humidity 0% to 85%
Display	High-definition 5.6-inch TFT color LCD, Resolution 480×640
Main Unit Dimensions	230×170×48 mm
Main Unit Weight	1.35 kg
Battery Life	Approximately 6 hours

Product feature and application

1) Enables rapid on-site detection of partial discharge conditions in high-voltage electrical equipment, particularly high-voltage cables. Features user-friendly operation, compact size, lightweight design, and portability.

2) The partial discharge detection sensor incorporates advanced RF signal processing, high-frequency signal processing, and weak signal processing technologies. Utilizes high-precision AD conversion and high-speed digital signal processing chips for digital signal processing, delivering excellent anti-interference performance and measurement accuracy.

3) Combines ultrasonic, transient earth wave, high-frequency, and ultra-high-frequency detection methods for comprehensive partial discharge signal analysis.

4) Features a built-in non-contact ultrasonic sensor and supports configurable external surface-mount ultrasonic sensors.

5) Provides multiple analysis windows including phase line, PRPD, and PRPS for interpreting partial discharge test data.

6) Supports data storage, viewing, and deletion functions.

7) Supports waveform data recording.

8) Supports multi-level threshold settings for warnings and alarms, providing intuitive visual alerts through color-coded amplitude indicators.

9) Powered by a high-capacity lithium battery, enabling 6–8 hours of continuous operation per charge.

10) Utilizes Linux as the embedded operating system, facilitating future functional expansion and integration with IoT technologies.

Prodection details

When applied to the live operation monitoring of most electrical equipment

Company Qualifications

FAQ

1)what is a partial discharge test ?

Partial discharge serves as both an indicator and manifestation of deteriorating insulation in electrical equipment, whilst also contributing to further insulation degradation. Given the often severe consequences of insulation breakdown, partial discharge testing of electrical equipment proves particularly crucial. Partial discharge in electrical equipment constitutes electrical discharge that does not result in complete short-circuiting of electrodes. While typically of low amplitude, such discharges progressively degrade insulation integrity, potentially leading to ultimate failure. Live partial discharge testing offers a rapid and straightforward method for identifying potential insulation faults that could cause power outages or personal injury.

2)how does partial discharge testing work ?

1. Suspend the detector in the air to measure and record the spatial background noise. Set the signal detection threshold based on the ambient noise level at the site. The background value can be recorded into the instrument via the settings page.
2. Aim the non-contact ultrasonic probe at the target area of the electrical equipment (e.g., switchgear door gaps). Observe the detected signal on the display for at least 15 seconds. If the signal's RMS/peak values show no abnormalities and the 50Hz/100Hz frequency correlation is low, save the data and proceed to the next point.
3. Maintain relative stillness relative to the switchgear enclosure. Avoid physical contact with the sensor head. Consistently position the probe at each test point to facilitate comparative analysis.
4. If abnormal signals are detected, perform multi-point testing. Extend the detection time to at least 30 seconds and record multiple data sets for amplitude comparison and trend analysis. Save waveform screenshots or record waveforms to the instrument for subsequent analysis.

3)is partial discharge testing destructive ?

This instrument is designed to capture partial discharge signals emitted during the detection of insulation defects in electrical equipment. Failure to detect discharges does not necessarily indicate the absence of discharge activity within the equipment. Discharge sources often exhibit a latent period, and insulation failure may also result from causes other than partial discharge. Should significant discharges be detected in equipment connected to medium- or high-voltage power systems, the responsible unit for the equipment must be notified immediately.

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