Power Projects Successfully Completes Short Circuit & Relay Coordination Study for a Critical Industrial Power System
We are pleased to announce the successful completion of a Short Circuit and Relay Coordination Study conducted by Power Projects for a critical industrial electrical power system.
The study was carried out to evaluate fault levels, protection coordination, relay performance, and system safety across the HV and LV electrical network under different operating conditions.
About the Study
The project involved a detailed assessment of a complex industrial power network with multiple power sources and interconnected HV and LV systems.
The study evaluated the electrical system under different operating configurations, including grid-connected, generator-only, and combined power-source operating conditions. ETAP was used to model the network and perform comprehensive short circuit and protection coordination analysis.
Study Covered
HV & LV Short Circuit Analysis
- Three-phase and single-phase fault assessment
- Evaluation of symmetrical and asymmetrical fault levels
- Analysis under multiple power-source operating conditions
Relay Coordination Study
- Protection relay setting assessment
- Time Current Curve (TCC) analysis
- Protection selectivity and discrimination assessment
- Switchgear short-circuit withstand verification
- ETAP-based electrical network modelling and simulation
- Development of detailed study reports and engineering recommendations
The analysis considered multiple operating scenarios to determine fault current levels across the network and verify whether electrical equipment remained within its applicable short-circuit withstand ratings.
Key Findings
The study identified areas where calculated fault levels exceeded the rated short-circuit withstand capability of certain switchgear under specific operating scenarios.
These findings enabled targeted engineering recommendations and provided a clear basis for improving equipment protection, fault isolation, and overall system safety.
The relay coordination assessment also established optimized protection settings to improve selectivity, sensitivity, system stability, and fault clearance, ensuring that the nearest protective device isolates the fault at the earliest possible time.
Key Outcomes
The study provided a comprehensive understanding of the electrical network's fault behaviour and protection performance, supporting:
- Improved protection coordination
- Faster and more selective fault isolation
- Enhanced equipment protection
- Identification of short-circuit rating concerns
- Improved system stability and operational safety
- Optimized relay settings for reliable system operation
The study was performed using ETAP, with the relay coordination methodology based on IEEE 242 – Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems.
Our Commitment
At Power Projects, we remain committed to delivering advanced power system studies and practical engineering solutions that help industries improve electrical system reliability, protection, safety, and operational performance.
Need a Short Circuit & Relay Coordination Study for Your Facility?
Power Projects delivers ETAP-based short circuit analysis, relay coordination, and TCC studies aligned to IEEE 242 for industrial and utility power systems worldwide.
