The single-channel partial discharge tester is a professional device used to detect partial discharge phenomena in power equipment. It operates by detecting pulse current signals generated by partial discharges. Below is an overview of an article about the single-channel partial discharge tester:
Single-Channel Partial Discharge Tester
Introduction
Partial discharge detection is a crucial part of power system maintenance, playing a significant role in preventing power equipment failures and improving system reliability. As an efficient and convenient detection method, the single-channel partial discharge tester plays a vital role in the maintenance and monitoring of power equipment.
Product Overview
Name: Single-Channel Partial Discharge Tester
Model: [Specific Model]
Manufacturer: [Manufacturer Name]
Main Features
Strong Anti-Interference Capability: Utilizes digital filtering technology to effectively eliminate on-site interference, enabling partial discharge measurement even in strong interference environments.
High Sensitivity: Capable of capturing weak partial discharge signals.
Multiple Display Modes: Offers various display modes such as ellipse, line, and sine, allowing users to choose according to their needs.
Data Storage and Transmission: Supports data storage and download to a computer via interfaces (such as USB) for further analysis.
Multiple Detection Frequencies: Supports frequency ranges under different detection modes, such as ultrasonic 20kHz to 200kHz, UHF 300MHz to 1.5GHz.
Zero Mark Indication and Phase Discrimination: Helps accurately identify discharge phase information.
Portable Design: Lightweight and easy to carry, suitable for on-site operations.
Technical Parameters
Detection Frequency: Varies according to different detection modes, such as ultrasonic 20kHz to 200kHz, UHF 300MHz to 1.5GHz.
Sensitivity: ≥100dB
Dynamic Range: ≥60dB
Battery Life: ≥8 hours
Display: High-definition color LCD, resolution [Specific Resolution]
Dimensions and Weight: [Specific Length]×[Specific Width]×[Specific Thickness], weight [Specific Weight]kg
Operating Temperature: -20℃ to +50℃
Storage Temperature: -40℃ to +70℃
Calibration Pulse Voltage Fall Time: >100μs
Power Supply: AC 220V±10%, 50Hz, power, fuse 0.5A
Application Scenarios
Power Transformers: Detect partial discharge phenomena inside transformers.
Switchgear: Including high-voltage switchgear and ring main units.
Cable Joints: Inspect insulation conditions of cable joints and terminations.
GIS/GCB: Detect partial discharges in gas-insulated switchgear.
Motors: Assess the insulation status of motors.
Usage Instructions
Startup Preparation: Adjust the time base mode to “Ellipse”.
Calibration: Correctly connect the calibration pulse generator and enable calibration.
After Calibration: Disconnect the calibration connection line and remove the calibration pulse generator.
Connect to High-Voltage Test Circuit Power: Turn on the zero mark switch, slowly increase the test voltage, and two zero mark pulses appear on the display ellipse, with a phase difference of 180 degrees. Rotate the “Ellipse Rotation” to a position convenient for observing discharges, typically where the zero mark pulses are located on the upper left and lower right of the ellipse, then continuously increase the voltage, noting any continuous discharges. When the discharge amount exceeds the specified low value, the voltage at that time is the partial discharge inception voltage.
At the Set Voltage: When observing discharge pulse signals, adjust the amplifier switch so that the discharge pulse height is between 0.2 and 2cm; the discharge amount is then the reading on the digital meter multiplied or divided by 10.
Maintenance and Care
Cleaning: Wipe the device surface with a soft cloth.
Storage: Store in a dry and ventilated place.
Calibration: Regularly calibrate the device.
Safety Precautions
Read Before Operation: Please carefully read the user manual.
Protective Measures: Wear necessary personal protective equipment.
No Touching: Do not touch high-voltage equipment.
Working Principle
The working principle of the single-channel partial discharge tester is based on detecting physical phenomena and electrical signal changes during partial discharges. Its core components include:
Preamplifier: Used to capture and amplify weak discharge signals transmitted from high-voltage equipment.
Filter: Selects signals within a specific frequency range to exclude interference.
Main Amplifier: Further amplifies the signal to a detectable level.
Display Unit: Displays graphical and numerical information of discharge pulses.
Advantages and Features
Strong Anti-Interference Capability: Enables partial discharge measurement in strong interference environments.
High Sensitivity: Capable of capturing weak partial discharge signals.
Multiple Display Modes: Offers various display modes such as ellipse, line, and sine, allowing users to choose according to their needs.
Data Storage and Transmission: Supports data storage and download to a computer via interfaces (such as USB) for further analysis.
Conclusion
The single-channel partial discharge tester is an important tool in power system maintenance, helping technicians detect potential partial discharge issues early and take preventive measures to ensure the safe and stable operation of the power system.
The above is a typical article overview of the single-channel partial discharge tester. Specific product features and parameters may vary depending on the manufacturer and model. If you need detailed information about a specific model, please provide the specific model name or other relevant information.
