Published by Nettlefold Projects | Chartered Multi-Disciplinary Design Engineers
At Nettlefold Projects, our design-first philosophy ensures every power system we deliver is safe, reliable, and fully compliant—before it’s ever built. Central to that commitment is our use of ETAP (Electrical Transient Analyzer Program), a world-class software platform for electrical system modelling and simulation.
By leveraging ETAP, our electrical engineers are able to simulate system behaviour under all expected—and unexpected—conditions, from standard load flow scenarios to arc flash risks and earth fault studies. These digital simulations inform our designs, eliminate assumptions, and allow our clients to proceed with total confidence in system performance and compliance.
What is ETAP Modelling?
ETAP is a comprehensive digital platform used for the modelling, analysis, design, simulation, and optimisation of electrical power systems. It enables a highly detailed, standards-based digital twin of the network—from HV infrastructure and generators through to final loads and protection devices.
Our Core ETAP Modelling Services
At Nettlefold Projects, we provide ETAP services to support greenfield designs, brownfield upgrades, and network compliance across utilities, mining, industrial and energy sectors. Key functions include:
Load Flow Analysis
We simulate steady-state performance to confirm voltage profiles, power factors, and loading across all buses and feeders—helping avoid inefficiencies and underperformance.
Arc Fault Analysis (Arc Flash Studies)
Using IEEE 1584 methodologies, we model arc flash energy levels and incident boundaries to ensure personnel safety and define PPE requirements as per AS/NZS 4836.
Fault Level and Short Circuit Analysis
We determine maximum and minimum fault levels, validating breaker sizing and fault withstand capacities for all critical equipment, including incomers, feeders, and protection relays.
Rolling Earth and Earth Potential Rise (EPR)
We perform touch and step potential studies and model rolling earth effects during high-energy fault conditions—especially critical in substations, rail systems, and remote mine sites.
Protection Coordination & Grading
We simulate protection timing and selectivity across primary and backup devices, ensuring correct fault clearance sequences and alignment with DNSP grading curves.
Motor Starting & Inrush Modelling
We assess motor acceleration profiles, voltage dips, and transient recovery behaviour for large LV and HV motor applications—ensuring operational integrity at start-up.
Harmonic Distortion Studies
We measure the impact of non-linear loads on system harmonics, and recommend filtering strategies to maintain compliance with power quality standards.
Why Choose Nettlefold Projects?
Chartered Electrical Engineers
Every model is built and reviewed by experienced, Chartered Professionals—ensuring technical accuracy and full compliance.
Standards-Aligned
We model and validate systems to meet AS/NZS 3000, 3017, 3835, IEEE 1584, IEC 60909, and utility-specific requirements (Endeavour, Ausgrid, Horizon Power, etc.).
Design-Led Approach
Unlike construction-first firms, we focus on robust upfront design and verification—eliminating risks before they appear on site.
Multi-Disciplinary Integration
Our ETAP modelling integrates seamlessly with civil, mechanical, and environmental engineering—supporting total project delivery.
Supporting Safer, Smarter Projects
Whether you’re developing a new substation, upgrading legacy infrastructure, or integrating a generator or battery system into the grid, Nettlefold Projects brings rigorous ETAP modelling and expert design to every stage.
Nettlefold Projects – Engineering Resilience Through Design.
