Products Description
Our online partial discharge monitoring system for transformer collects synchronized discharge pulses from the selected sensors and produces phase-resolved data for trend and alarm analysis. The four-channel host supports serial, Ethernet, and USB interfaces.
Technical Principle
Sensors capture high-frequency, UHF, ultrasonic, or transient-earth-voltage signals produced by insulation discharge. The monitoring unit filters interference, extracts pulse features, compares phase-resolved patterns, and records amplitude and repetition trends for alarm and diagnosis.
Product Features
The online partial discharge monitoring system for transformer combines electromagnetic and acoustic sensing for broader discharge coverage. Synchronized channels support phase-resolved comparison across monitored points. Sensor-specific bands help separate transformer discharge signals from site noise. A wide host power range and three interfaces support substation installation.
Operating Conditions
The product shall be installed and operated within the ratings stated in the technical parameters. Key site requirements include: frequency, UHF, ultrasonic, or transient-earth-voltage sign. Keep the installation area clean, adequately ventilated, free from corrosive gas and severe vibration, and provide the specified grounding, clearance, and power quality.
Product Parameters
|
Parameter |
Details |
|
Host channels |
4 channels |
|
Host sampling |
≥12 bit; ≥100 MHz per channel |
|
Host sensitivity / range |
10 pC; 10 pC-100 nC |
|
UHF sensor band |
300 MHz-1.5 GHz |
|
UHF range / sensitivity |
-70 to -20 dBm; ≤-70 dBμV |
|
HFCT band |
100 kHz-100 MHz |
|
HFCT sensitivity / range |
≤1 pC; 1-10000 pC |
|
Ultrasonic center frequency |
150 kHz |
|
Host power |
AC 85-260 V, 50/60 Hz; 20 W |
|
Communication |
RJ45, RS485, and USB |
Product Advantages
- The online partial discharge monitoring system for transformer combines electromagnetic and acoustic sensing for broader discharge coverage.
- Synchronized channels support phase-resolved comparison across monitored points.
- Sensor-specific bands help separate transformer discharge signals from site noise.
- A wide host power range and three interfaces support substation installation.
Main Applications
The online partial discharge monitoring system for transformer is used for power transformers, reactors, bushings, grounding leads, and accessible tank locations.
It is installed for continuous condition monitoring at substations and power plants.
The system supports trend analysis, alarm evaluation, and maintenance planning.
Components
|
Part |
Function |
|
Monitoring host |
Synchronizes acquisition, processing, storage, and communication. |
|
UHF sensor |
Detects high-frequency electromagnetic discharge signals. |
|
HFCT sensor |
Measures pulse current on a grounding conductor. |
|
Ultrasonic sensor |
Detects acoustic energy produced by discharge activity. |
FAQ
Q: What information is needed for model selection?
A: Provide transformer type, accessible sensing points, expected noise, channel count, and station protocol.
Q: What should be checked before installation?
A: Check UHF mounting, HFCT direction, acoustic coupling, cable shielding, grounding, and phase reference.
Q: How can the device or system be integrated?
A: RJ45 and RS485 interfaces transfer measurements, alarms, and trend data to the monitoring platform.
Q: Which options should be confirmed before production?
A: Confirm sensor types, quantities, cable lengths, host supply, communication, and installation accessories.
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