Proper coordination makes it possible to:

• Reduce the risk of electrical incidents by limiting the energy released during a short circuit;
• Minimize production downtime through optimal selectivity between circuit breakers and fuses;
• Improve operator safety by reducing the incident energy during an electric arc;
• Ensure regulatory compliance with current standards and Hydro-Québec requirements (see section 1.2.1.4 of the Blue Book);
• Extend equipment life by avoiding repetitive or untimely tripping.

Our engineers conduct a detailed analysis of your electrical installations using specialized software such as EasyPower.

The study includes:

1. Data collection: on-site survey of protective devices (circuit breakers, fuses, relays) and single-line diagrams.
2. Network modeling: simulation of your electrical system at nominal voltages (600 V, 4.16 kV, 25 kV, etc.).
3. Superimposition of protection curves: analysis of time/current curves to verify selectivity between equipment.
4. Adjustment of settings: optimization of trip parameters (LT, ST, Inst, I²t) to ensure a reliable protection sequence.
5. Detailed report: clear presentation of results with diagrams, recommendations, and technical appendices.
6. Link to the Arc Flash study: reduction of incident energy levels through optimized coordination.

We have assisted several industrial, commercial, and maritime clients in the Quebec City, Montreal, Chaudière-Appalaches, Gaspésie, Centre-du-Québec, and Saguenay-Lac-Saint-Jean regions:

• Sawmill: adjustment of protections to coordinate the main circuit breaker with motor fuses, ensuring continuity of operation while reducing the risk of arc flash.
• Industrial client: coordination between the client’s 25 kV fuses and Hydro-Québec’s 4.16 kV protection, with replacement recommendations to ensure compliance
• Municipal building: validation of coordination between PP1, PS1, and PS2 panels, with adjustment of instantaneous settings to prevent false trips

• Recognized expertise in electrical protection coordination.
• Comprehensive reports accepted by distributors and regulatory agencies.
• Integrated approach including Arc Flash studies and CSA Z462 compliance.
• Practical, customized solutions for your facilities.

Want to optimize the safety and reliability of your installations? Entrust your protection coordination study to 3E Eng.

Contact us today for a personalized quote and to ensure the compliance and performance of your electrical network.