Digital Fault Recording (DFR)

Accurate, High-Speed Monitoring of Power System Disturbances

Digital Fault Recording (DFR) is critical to understanding and responding to power system faults. By capturing high-speed, high-resolution snapshots of disturbances and transient events, modern DFR systems empower network operators with the insights they need for rapid diagnostics, event reconstruction and informed asset management decisions.

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Application Overview

DFR is engineered for use in high‑voltage substations, transmission systems, and generating stations, enabling operators to monitor system behaviour during faults and disturbances. It supports variable sampling rates, extensive trigger options, synchronized data capture across multiple devices, and seamless integration into wide‑area monitoring systems. Whether used as a standalone recorder or as part of a multi‑device architecture, the DFR provides precise and time‑aligned fault records that support fast and accurate post‑event analysis.

Fault Investigation and Event Reconstruction

Capture and analyse high-speed fault records to determine the root cause of network disturbances. With flexible sampling rates and variable record lengths, the IDM+ ensures detailed insight into transient system behaviour.

Power System Transient Monitoring

Monitor high-frequency transients such as those from capacitor switching, FACTS devices or lightning-induced faults. 512 samples per cycle (25.6kHz) allows accurate reproduction of short-duration, high-impact events.

Storm Event and Grid Resilience Monitoring

Deploy DFRs across critical nodes to monitor system performance during storms and severe weather events. Automated analysis tools can rapidly assess network response and identify weaknesses for proactive maintenance.

TECHNICAL

Features & Functionality

Accurate Measurements

With 20‑bit resolution on current channels and ±0.1% accuracy, the system provides clear and reliable data across all load conditions. This makes it easier to understand what caused a fault and verify how equipment performed.

High‑Speed Data Capture

The IDM+ records fault waveforms at very high speeds — up to 512 samples per cycle — so it can pick up fast‑moving changes in the power system. This helps operators clearly see what happened during a fault or disturbance.

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Flexible Event Triggers

The recorder can be set to trigger from many different conditions, such as limits being exceeded, fast changes, digital inputs, or power swings. It can also save up to 30 seconds of data before and after an event, so operators get the full picture.

Time‑Aligned Recording Across Devices

Multiple IDM+ units can work together by sharing triggers over the network. With GPS or IRIG‑B time sync providing accuracy down to 100 nanoseconds, all captured records line up perfectly, making it easier to analyze system‑wide events.

Functionality & Options

Variable sampling rates (30.7 kHz down to 1.9 kHz) for fault and transient monitoring.
Selectable analog channel configuration, where any channel can be ordered as voltage, current, or DC.
Multiple channel count options — 9, 18, or 36 analog channels depending on model size.
Synchronized time stamping using GPS or IRIG‑B, achieving up to 100 ns accuracy.
Automatic or manual decimation to reduce record size for slower communication paths.
Seamless integration with system‑wide monitoring through Ethernet, serial, modem, or fibre‑optic communication options.
Centralized data management via iQ+ master station software, supporting storage, processing, visualization, and reporting.

Key Technical Specifications

Analog inputs: 9, 18, or 36 channels (20‑bit current, 16‑bit voltage/DC).
Sampling rates: 60 Hz systems: 30.7, 15.3, 7.6, 3.8, 1.9 kHz;
50 Hz systems: 25.6, 12.8, 6.4, 3.2, 1.6 kHz
Accuracy: ±0.1% of full scale.
Digital inputs: 32, 64, or 128 channels with selectable debounce.
Data storage: 4 GB CompactFlash standard (optional 8 or 16 GB).
Time sync: GPS (100 ns), IRIG‑B/J, 1 pps.
Environmental: –5 to +50°C operation; –30 to +70°C storage.
Mechanical:
3U model: 15 kg
6U model: 23 kg

EXPERIENCE

Our Projects featuring Insulect Networks

Explore our project highlights to see where Insulects 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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High-res disturbance & fault recording & location

ADVANTAGES

Why Choose Insulect for Networks

Insulect provides Australian utilities and energy providers with world-class fault and disturbance monitoring solutions backed by deep industry expertise, local support, and future-ready technology.

Trusted Platform

The IDM+ is deployed across thousands of substations in Australia and globally. With proven reliability and compatibility with AEMO requirements, it’s the trusted standard for advanced fault recording.

Local Engineering Support

From system design and integration to on-site support and training, our Brisbane-based team ensures your monitoring system performs reliably and delivers results from day one.

End-to-End Lifecycle Services

Our services include installation, commissioning, repairs, firmware updates, and full system upgrades. We help customers get more value out of their monitoring investment over time.

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.