Dissolved Gas Analysis Monitoring

A Clear View Into Transformer Health

Dissolved Gas Analysis (DGA) monitoring helps identify early signs of internal electrical or thermal issues inside transformers by measuring the gases that dissolve into the insulating oil. These gases are produced when components begin to heat, deteriorate, or experience electrical stress. By observing both gas levels and how quickly they change, DGA provides practical insight into developing problems so that action can be taken before a fault becomes serious.

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Application Overview

DGA monitoring is used across transmission, distribution and generation networks where transformer uptime is critical. Online systems monitor gas levels continuously—unlike periodic lab sampling—making them especially effective for identifying both rapid and slow‑developing electrical or thermal faults. Depending on the need, utilities deploy:

Hydrogen‑only monitors for healthy or lower‑criticality transformers.
Multi‑gas monitors for critical assets or transformers already showing gassing activity.

Both approaches support early detection, condition trending and better planning of maintenance or replacement.

What We Solve For

Transformers can develop internal issues long before they show external symptoms. Faults such as overheating, insulation breakdown, arcing, partial discharge and mechanical stress each produce specific gases. DGA monitoring identifies these changes early, helping avoid unplanned outages, extending transformer life and reducing the financial impact of emergency replacements. Continuous DGA also supports the shift from scheduled maintenance to condition‑based strategies by providing meaningful, real‑time data on asset health.

TECHNICAL

Features & Functionality

Functionality & Options

Real‑time trending of gas levels and rate‑of‑change alarms.
Hydrogen‑only monitoring (TM1) for detecting a wide range of incipient faults.
Multi‑gas monitoring (TM8) including H₂, CO, CO₂, CH₄, C₂H₂, C₂H₄, C₂H₆, O₂, N₂.
Moisture‑in‑oil and oil temperature monitoring (optional).
Total Dissolved Combustible Gas (TDCG) output for condition assessment.
IEEE / IEC diagnostic support including Duval Triangles and Rogers Ratios.
Forced oil circulation (TM1) for consistent sampling.
Automated GC calibration verification (TM8).
Integration with TM View and SmartSUB for fleet‑wide visualization and diagnostics.

Key Technical Specifications

Operating temperature: −50°C to +55°C
Enclosure: NEMA 4X / IP66
Oil Inlet Pressure Capability: TM1: 0–100 psi; TM8: 0–45 psi

Data Logging: TM1 up to 5 years; TM8 up to 2 years
Safety Certifications: comply with IEC 61010‑1 and related safety standards
Standard Communication Interfaces: RS‑232, RS‑485, support for Modbus and DNP3 protocols

EXPERIENCE

Our Projects featuring Insulect Transformers

Explore our project highlights to see where Insulect Transformers are making an impact.
For tailored advice on whether this solution suits your network, please connect with our team here.

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Advanced Transformer Bushing Monitoring: Preventing Failures Through Real-Time Insights

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Hour-by-Hour Monitoring: Detecting a Developing Transformer Fault with the Serveron TM8

ADVANTAGES

Why Choose Insulect for DGA Monitoring

With both single‑gas and multi‑gas options available, our solutions are designed to suit different criticality levels while delivering consistent, accurate insights that help protect valuable transformer assets.

Proven and Standards‑Aligned
Technology

Our systems use measurement methods supported by decades of IEEE and IEC research, including GC—the only multi‑gas method recognized in global standards—which ensures repeatable, trustworthy results.

Scalable Monitoring Across
the Transformer Fleet

With both TM1 and TM8, you can deploy simple hydrogen monitors for less‑critical assets and comprehensive multi‑gas monitors for transformers requiring detailed oversight—allowing a consistent strategy across the entire fleet.

Reliable, Low‑Maintenance
Hardware

Both TM1 and TM8 are designed for long‑term field operation with minimal upkeep. TM1 removes membranes and consumables, while TM8 automates calibration to maintain accuracy. This reduces operational effort and lowers total cost of ownership.

IMPLEMENTATION

Services & Support

Insulect offers comprehensive services and support for the products we manufacture and specialise in, enhancing value for local utilities, major energy users, equipment manufacturers, and service operators.

LOCAL TECHNICAL TEAM

Our local technical team provides exceptional support and expertise, ensuring quick response times and personalised service to tackle any challenges that may arise during project execution.

ENGINEERING DESIGN

Our team utilises advanced technology and industry knowledge to develop innovative and efficient high-voltage switchgear solutions, customised to fit the unique requirements of each project.

PROCUREMENT & LOGISTICS

We facilitate smooth procurement and logistics processes by sourcing from trusted, proven partners and coordinating timely deliveries, ensuring projects remain on schedule and within budget.

TESTING & COMMISSIONING

Professional testing and commissioning support ensure that every high-voltage switchgear system functions safely and reliably, adhering to all regulatory standards and client expectations.

TURNKEY PROJECT DELIVERY

We are able to oversee every phase from concept to completion, providing comprehensive solutions that simplify complex projects and ensure successful outcomes.

FACTORY VISITS

We facilitate client visits to our local manufacturing sites here in Australia, as well as overseas, for initial inspection as well as factory acceptance testing.