HF-T-603 Transformer Partial Discharge Online Monitoring Device

Overview of Transformer Partial Discharge Online Monitoring

Transformer Partial Discharge Online Monitoring – this transformer online partial discharge monitor enables intelligent insulation monitoring for all HV and EHV transformers. It supports live non-destructive mounting, leverages multi-sensor fusion, anti-interference algorithms and edge computing to collect PD signals round-the-clock, assess insulation health, warn against hidden risks and pinpoint faults.

It eliminates delayed testing and missing defects in traditional inspection, detects occasional sudden partial discharge, serves as key equipment for grid condition-based maintenance, and is widely used in substations, new energy plants and industrial facilities.

Functional Features

Multi-technology Anti-interference

Integrated with multiple interference suppression technologies to filter out interfering signals and guarantee accurate monitoring data.

Real-time Comprehensive Analysis

Performs real-time comprehensive analysis on partial discharge signals, including time-domain, frequency-domain and time-frequency analysis, as well as multi-channel waveform correlation and expansion analysis. It generates statistical analysis of PRPD and PRPS patterns to improve fault diagnosis accuracy.

Defect Location via Combined Electrical and Acoustic Signal Analysis

Supports multi-channel signal monitoring of high frequency, ultrasonic and UHF signals. Defect positions are determined through joint analysis of electrical and acoustic signals.

Instant Capture of Transformer Transient Faults

Multiple online partial discharge monitoring methods are adopted to rapidly capture transient faults of transformers.

Integrated Design

Highly integrated all-in-one structure delivers stable and reliable performance. Compact and lightweight with built-in shock absorbers inside the cabinet to enhance internal equipment stability and shock resistance.

Main Performance Parameters Table

Category	Parameter	Technical Index
Ultrasonic	Sensor Peak Sensitivity	≥70dB(V/(m/s))
	Sensor Average Sensitivity	≥60dB(V/(m/s))
	Detection Frequency Band	20kHz~200kHz
	Detection Sensitivity	≤40dB
	Dynamic Range	≥60dB
	Linearity Error	≤10%
High Frequency	Detection Frequency Band	100kHz~100MHz
	Transmission Impedance	≥16mV/mA (within 3MHz~30MHz frequency band)
	Lower Limit of Measurable Discharge Capacity	≤1pC
	Output Impedance	50Ω
	Output Mode	BNC Output
Ultra High Frequency (UHF)	Detection Frequency Band	300MHz~2GHz
	Amplitude-Frequency Characteristic	Average effective height ≥15mm within 300MHz~1500MHz frequency band
	Detection Sensitivity	≤2V/m
	Dynamic Range	≥60dB
General Technical Specifications	Measurement Channels	6 independent measurement channels (freely combined with High Frequency, Ultrasonic, UHF)
	Synchronization Mode	External synchronization, frequency range: 50~500Hz
	Electromagnetic Compatibility (EMC)	Meets Level 4 requirements of power system
	Interfaces	RJ45 (optical or electrical port), RS232, RS485, USB
	Supported Protocol	Standard RTU Protocol
	Power Supply	AC 85-260V or DC 100V-300V
	Power Consumption	20W

Product Application

1. Main transformer protection for high-voltage substations: Conduct 24-hour insulation monitoring on main transformers of 110kV and above hub substations to eliminate hidden dangers of insulation deterioration and guarantee stable grid operation.
2. Protection for new energy booster stations: Adapt to harsh field conditions of wind power and photovoltaic booster stations, realize remote unattended monitoring and timely detect sudden discharge faults of transformers.
3. Monitoring of key industrial equipment: Monitor core transformers in petrochemical, metallurgy, rail transit and other industries to prevent unplanned production line shutdowns and reduce economic losses.
4. Insulation evaluation of aging equipment: Track aged transformers with degraded insulation, replace excessive routine maintenance and extend service life by 3 to 5 years under safe conditions.
5. Post-fault auxiliary analysis: Access full-cycle historical discharge data to restore fault evolution and provide data basis for accident investigation and equipment improvement.
6. Support for condition-based maintenance of smart grid: Supply quantified insulation data to help power departments shift from periodic maintenance to condition-based maintenance and optimize operation and maintenance resource allocation.

Installation Instructions

1. Site Survey: Confirm electromagnetic environment and sensor positions, adopt non-power-cut non-destructive construction to avoid affecting substation operation.
2. Sensor Layout: Fix HF clamp sensors on grounding downleads, UHF sensors on oil drain valves, ultrasonic sensors on tank surface; no transformer structural modification needed.
3. Equipment Wiring: Wall mount the main unit next to control cabinets, lay shielded coaxial cables along cable trays with shielding treatment.
4. Debugging: Power on for signal checking, interference suppression, threshold setting and multi-channel synchronization calibration.
5. Platform Access: Connect to user operation platform via Ethernet after protocol matching to realize remote viewing and alarm push.
6. Acceptance & Delivery: Train on-site staff, deliver technical documents and finish project acceptance.

Why Choose Us

Authoritative Qualifications & Strict Quality Control

Transformer Partial Discharge Online Monitoring products have passed Type Test Class A issued by State Grid Electric Power Research Institute. We own a CNAS-accredited calibration laboratory. Every unit undergoes a full inspection including 72-hour high-temperature aging, vibration test and calibration with standard partial discharge sources before delivery, to guarantee precise and reliable monitoring data.

Extensive On-site Application Experience

Transformer Partial Discharge Online Monitoring equipment has been stably deployed in hundreds of substation projects of central SOEs including State Grid, Huaneng and Datang. Field applications prove the false alarm rate is controlled below 3%. Multiple early warnings of critical insulation faults at the initial discharge stage have prevented blackout losses worth millions.

Full-lifecycle Localized Service

A nationwide service network is established. We provide 24-hour remote technical support and on-site troubleshooting within 72 hours. Lifecycle one-stop services covering installation, commissioning, training and regular calibration eliminate after-sales concerns thoroughly.

High Cost Performance with No Hidden Costs

The innovative cylinder-free maintenance-free design eliminates recurring purchase of high-pressure carrier gas and frequent on-site inspections. Its whole-lifecycle operation & maintenance cost is 60% lower than conventional counterparts, delivering long-term tangible benefits.

Open & Compatible System Architecture

Transformer Partial Discharge Online Monitoring is compliant with IEC 61850 and mainstream power communication protocols, it seamlessly connects to existing operation platforms without system replacement, eliminating data silos among multi-brand devices.

FAQ

Q1: Is transformer power cut required for device installation?

A1: No power outage is needed at all. Adopting a fully non-intrusive installation method, all sensors can be installed while the transformer is live without touching internal structures or interrupting normal power supply.

Q2: With strong electromagnetic interference in substations, will the device trigger frequent false alarms?

A2: It will not. Equipped with self-developed multi-dimensional anti-interference algorithms, the equipment filters environmental interference such as switch operations and mobile signals via joint time-domain and frequency-domain analysis. Verified by hundreds of field projects, the false alarm rate is kept below 3%.

Q3: Is follow-up maintenance complicated? Do spare parts need frequent replacement?

A3: Featuring a cylinder-free structure, the device requires no annual replacement of high-pressure carrier gas as traditional oil chromatography devices do. Only one routine inspection and calibration per year is needed under normal operation with minimal maintenance workload.

Q4: Can this device connect to our existing substation monitoring platform?

A4: Fully compatible. Built-in standard power communication protocols including Modbus and IEC 61850 enable seamless access to most mainstream operation platforms. Custom development is available for exclusive private protocols upon demand.

Q5: Can customized solutions be provided for transformers with special voltage levels?

A5: Yes. We provide customized sensor configurations and monitoring solutions for 10kV to 500kV transformers, along with special working conditions including plateau and low-temperature environments to satisfy personalized demands.

Q6: What is your after-sales response time if the equipment malfunctions?

A6: We guarantee remote technical support within 24 hours. If the problem cannot be resolved remotely, local professional engineers will arrive on site within 72 hours to restore normal operation of the device promptly.