Product Introduction

Partial discharge is a pulsed discharge that generates a series of physical phenomena and chemical changes, including light, sound, electrical, and mechanical vibrations, both inside and around electrical equipment. These various physical and chemical changes associated with partial discharge can provide detection signals for monitoring the internal insulation condition of electrical equipment. When insulation defects occur within high-voltage electrical equipment, partial discharge signals are typically produced. By detecting and analyzing these partial discharge signals, one can determine if there are insulation hazards within the high-voltage equipment, preventing the further expansion of potential accidents.

The EDJF-9008 multi-functional partial discharge survey instrument produced by Wuhan鄂电Electric Power Test Equipment Co., Ltd. is a handheld device that utilizes ground electrical waves, ultrasonic waves, ultra-high frequency, and high-frequency current detection methods to test the partial discharge conditions of equipment. It can read the amplitude and waveform patterns of partial discharge and offers storage and reading functions for two-dimensional and three-dimensional diagrams. It effectively assesses the partial discharge conditions of electrical equipment. This multi-functional partial discharge survey instrument is suitable for the partial discharge detection of electrical equipment such as GIS, switchgears, transformers, and power cables.

The equipment is portable, easy to operate, and all the inspections have no impact on the operation of high-voltage equipment. The product allows for multi-cycle observation of measurement signals, frequency identification of discharges, and analysis through various modes, enabling clear fault judgment. Its measurement technology has reached a high level both domestically and internationally.

Product Features

Product Reference Standards

DL-T 1416-2015 General Technical Conditions for Ultrasonic Partial Discharge Testers

Q/GDW 11059.1-2013 Field Application Guide for Partial Discharge Live Testing Technology of Gas-Insulated Metal-Enclosed Switchgear

Guideline for Field Application of Transient Earth Voltage Partial Discharge Live Testing Technology for AC Metal-Enclosed Switchgear according to Q/GDW 11060-2013

Q/GDW 11063-2013 Specification for Transient Voltage Partial Discharge Detector

IEC60270 "Partial Discharge Measurement"

GB1094 "Power Transformers"

IEC6067.11 "Dry-Type Transformer"

IEC60885-3 "Overall Extruded Cable Partial Discharge Test"

GB1094 "Power Transformers"

GB1207 "Voltage Transformer"

GB12706.4 "Requirements for Tests of Power Cable Accessories"

GB/T3048.12 "Test Methods for Electrical Properties of Wires and Cables - Partial Discharge Test"

GB/T 16927 - High Voltage Test Technology

GB/T7354 "Partial Discharge Measurement"

GB1208 "Current Transformer"

DL417 Field Measurement Guideline for Partial Discharge of Electrical Equipment

Technical Specifications

1. Application Range: Utilizes non-intrusive detection methods for the detection and location of partial discharge defects in high-voltage electrical equipment.

2. Sensor Configuration

Standard Configuration: Ultrasonic Sensor (UA), Ground Electro-Magnetic Wave Sensor (TEV)

Optional: Transformer-specific sensor networks, GIS-specific ultra-high frequency sensors, and high-voltage cable-specific sensors. Customization available upon customer request.

3. Testing Principles: Ultrasonic Method (UA), Ground Electrode Method (TEV), and Ultra-High Frequency Method (UHF).

4. Test Bandwidth:

Ultrasonic: 40~200 kHz

Terrestrial wave: 3~100 MHz

Special High Frequency: 300～2000 MHz.

5. Measurement Range:

Ultrasound: -90 to 80 dB

Terrestrial Radio Wave: -80 to 10 dBm

Ultra High Frequency: -80 to 10 dBm

6. Sensitivity: as low as 10pC (specifically depending on the distance between the sensor and the power source).

7. Sensor:

Ultrasonic Sensor: 20-200 kHz

② Terrestrial Electromagnetic Waves (TEV): 5 ~ 100 MHz.

③ High-frequency sensor: 300-2000 MHz, with directional receiving characteristics.

8. Equipped with built-in ultrasonic sensors, combined geoelectric and ultrasonic sensors, optional transformer-specific sensors, GIS-specific sensors, cable-specific sensors, and other components.

9. Software Features:

Continuous detection of ultra-high frequency, ground wave, and ultrasonic signals to determine the presence of partial discharge.

② Real-time display of the change trend of the measured signal, allowing for a relatively intuitive judgment of the development of partial discharge signals.

③ On-site data storage capability.

10. Instrument Features:

Screen Display: High Contrast 3.5-inch TFT Color Screen.

② Data Storage: Stores up to 1,000 test data sets.

③ Power Supply: Built-in 8.4V lithium battery, capable of continuous operation for 8 hours.

④ Power: Input 100-240VAC, output 8.4V/3A, charging time 3-4 hours.

⑤ Dimensions: 220 * 100 * 40.

⑥ Instrument Weight: 1.5 kg.

Operating Temperature: -25℃ to 45℃.

Storage Temperature: -35℃ to 60℃.