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Transmission Line Fault Location

High‑precision timing
Integrated workflow

Pinpoint accuracy. Faster response. Smarter recovery.

The Qualitrol TWS FL Fault Location Monitor delivers industry-leading accuracy using travelling wave technology to pinpoint faults on transmission lines—often within ±60 metres. Designed for high-availability networks, the TWS FL-1 and FL-8 models provide real-time fault data for 1 to 8 circuits, enabling rapid, informed responses that minimise downtime and repair costs. With seamless integration into control rooms via Qualitrol iQ+ software, this advanced solution empowers utilities to detect, locate, and act on faults faster than ever before.

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Critical Transmission Networks

Designed for interconnected overhead transmission lines where uptime is essential and accurate, rapid fault location directly supports operational continuity.

Multi-Circuit Fault Monitoring

TWS FL-8 enables simultaneous monitoring of up to 8 circuits, ideal for substations and complex grid interconnects.

Remote Dispatch Centre Visibility

Accurate fault data is automatically relayed to control rooms within minutes—reducing response times and improving safety.

 

Integrated Grid Management

Compatible with Qualitrol iQ+ software, enabling end-to-end visualisation and reporting from event to field team mobilisation.

TECHNICAL

Features & Functionality

Transformer management
High‑precision Timing

Internal GPS and time sync to 100 ns; double‑ended method for accurate location. 

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Wide Line Length Support

Accurate to ±60 m on lines up to 1000 km.

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Choice of Methods

Impedance‑based fault location standard, with optional TWS card for highest accuracy.

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Integrated Workflow

Results computed and displayed in iQ+ master station for streamlined operations.

Functionality & Options

  • Precise Fault Isolation
    Travelling Wave technology delivers highly accurate fault location to within ±60 metres—helping maintenance teams pinpoint faults faster, reduce patrol time, and restore service efficiently.
  • Rapid Deployment
    Compact, modular devices (TWS FL-1 or FL-8) are designed for scalable deployment across single or multi-circuit transmission lines, providing flexibility for evolving network needs.
  • Real-Time Event Visibility
    Accurate fault data is automatically relayed to the control room within minutes of a trip. Events are visualised using Qualitrol iQ+ software and sent to crews via email, enabling faster response.
  • Minimal Manual Intervention
    Intermittent faults and complex circuit issues are tracked with confidence, reducing reliance on time-consuming patrols and enhancing overall system uptime.

Key Technical Specifications

  • Rated Voltage: 12 kV / 24 kV / 36 kV
  • Rated Current: 8 A to 400 A
  • Operation Count Setting: Field-settable from 1 to 4
  • Mounting Compatibility: Fits standard dropout fuse mounts
  • Configuration: Compatible with SWER, single-phase, and three-phase models
  • Mechanical Life: >2,000 operations
  • Standards Compliance: AS 62271.102 / IEC 62271.102
EXPERIENCE

Our Projects Featuring Insulect Networks Products

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

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Powering Up Tallawarra: Delivering Specialised Solutions for a Critical Energy Upgrade
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High-res disturbance & fault recording & location

Where you'll find our Networks Products

You'll find Insulect-supplied and installed Networks products across Australia and New Zealand.

ADVANTAGES

Why Choose Insulect Fault Location Solutions

The Qualitrol TWS FL series offers industry-leading precision for fault location on high-voltage transmission lines. Using advanced travelling wave technology, these devices detect and localise faults to within one tower, far surpassing traditional impedance methods.

Designed for utilities where uptime and rapid recovery are most critical, the TWS FL-1 and FL-8 deliver accurate and consistent results across all fault types. Whether for single or multiple circuits, data is captured and displayed in near real-time, enabling faster decision-making and dispatch.

Engineered for reliability in critical environments, the TWS range seamlessly integrates with control systems and iQ+ software. Flexible communications and modular hardware make it simple to install, scale, and maintain.

Trusted across Australian networks, Qualitrol’s TWS FL delivers proven performance, helping asset managers reduce patrol time, lower maintenance costs, and increase operational resilience. 

Pinpoint Accuracy

Travelling Wave technology delivers location precision down to ±60 metres—independent of line impedance or fault type. This allows utilities to dispatch crews directly to the source of the issue, reducing patrol time, improving safety, and accelerating service restoration.
Rapid Response & Visualisation

Circuit trips are automatically captured and visualised in the control room within minutes via Qualitrol iQ+ software. Maintenance teams receive immediate email notifications, ensuring faster fault response and minimised network disruption.
Modular & Scalable Hardware

Whether monitoring one or eight circuits, the TWS FL range is built for flexibility. With options like FL-1 for single lines and FL-8 for multiple circuits, plus integration with IDM+ for multifunction monitoring, the system adapts to any network configuration or growth.
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 ensures 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.
  
FROM THE BLOG

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