Training Coordinator, Industrial Paint Manufacturer
“The safety induction for new hires was handled smoothly. Elion brought their own AV equipment and kept the session engaging. We’re thinking of repeating this monthly.”
Relay Coordination Study & Services
What is Relay Coordination?
Relay Coordination involves setting and coordinating protective relays in an electrical system to ensure selective isolation during faults, minimizing disruption while protecting equipment and personnel.
A well-executed Relay Coordination Study helps optimize relay settings so that only the faulty section is isolated during a fault, maintaining power continuity in the rest of the system.
Why is Relay Coordination Important?
- Ensures system protection: Prevents cascading failures during faults.
- Selective tripping: Isolates only the affected section while maintaining supply to healthy areas.
- Compliance with standards: Required under IS, IEC, and IEEE norms for safety and reliability.
- Prevents equipment damage: Timely isolation prevents stress on cables, transformers, and switchgear.
- Enhances operational safety: Minimizes arc flash incidents and operational hazards.
- Supports system stability: Ensures network stability during fault conditions.
What Elion Offers in Relay Coordination Services
- Short Circuit Studies: To calculate fault levels using ETAP/Dialux/PowerFactory.
- Load Flow Analysis: To understand load conditions impacting relay settings.
- Protection Relay Settings Calculation: Current and time settings for relays.
- Time-Current Characteristic (TCC) Curves: For visual coordination validation.
- Coordination of Relays: For LV, MV, and HV systems, including ACB, MCCB, ELCB, and IDMT relays.
- Recommendations for Setting Adjustments: To align with system conditions and upgrades.
- Verification and Testing: Field testing and relay setting validation if required.
- Detailed Reports: Comprehensive report with TCC plots, settings tables, and recommendations.
- Training: On relay operations, coordination concepts, and interpretation of TCC curves.
Standards We Follow
- IS 3231 (Protective Relays)
- IEC 60255 Series
- IEEE Std 242 (Buff Book)
- IEEE Std 399 (Brown Book)
- National Electrical Code (NEC)
- OEM recommendations for relays and breakers
Benefits of Choosing Elion for Relay Coordination
- 20+ years of electrical safety and system study expertise.
- Pan-India service for industrial, commercial, and critical infrastructure facilities.
- Advanced simulation tools (ETAP, PowerFactory) for accurate analysis.
- Experienced engineers with deep protection system knowledge.
- Actionable, clear reporting with recommendations.
- Support for periodic review and compliance requirements.
- Post-study assistance for implementing relay setting changes.
Who Needs Relay Coordination Studies?
- Industries with large electrical networks
- Data centers and IT facilities
- Hospitals and healthcare facilities
- Oil & Gas and chemical plants
- High-rise commercial and residential complexes
- Renewable energy plants
- Utilities and substations
Our Relay Coordination Study Process
- Data Collection: SLDs, relay details, protection schemes, equipment ratings.
- Short Circuit & Load Flow Studies: Establish system behavior under fault conditions.
- Relay Settings Calculation: Based on fault levels, load currents, and OEM data.
- TCC Curve Development: To visualize overlapping and coordination.
- Recommendations & Adjustments: Proposed relay settings for effective selectivity.
- Reporting: Submission of detailed report with plots and tables.
- Implementation Support: Assistance during relay setting adjustments and field testing.
Contact Elion for Relay Coordination Studies
Ensure the safety, reliability, and efficiency of your electrical system with Elion’s expert Relay Coordination Studies.
Request a Quote or contact us at [email protected].
Client Testimonial
EHS Officer, Specialty Chemicals Unit
“Good response from our team for the chemical spill drill and awareness session. We had a minor leak last year and this training was timely. They even explained the MSDS sheet details clearly.”
HR Coordinator, Shared Services Office
“Elion conducted ergonomics training for our office support staff. They gave tips that don’t need any budget—just posture, breaks, and seating angles. Everyone found it useful.”
Logistics Supervisor, FMCG Warehouse
“Warehouse safety training was organized at our distribution center. The module covered stacking, material flow, and emergency handling. One or two team leads found the content basic, but the newcomers appreciated it.”
Site Incharge, Metro Rail Project
“The hot work and gas cutting safety training helped us address some recent near-misses. Our fabrication contractors said it was the first time anyone explained why permits matter, not just how to fill them.”
HR Manager, Corporate Insurance Firm
“We held a training on ergonomics and workstation safety. Elion’s speaker had a practical approach—suggested small furniture changes and posture tips that didn’t cost much but helped our office staff.”
Plant Head, Frozen Foods Facility
“Elion covered cold storage safety and ammonia handling well. Some of our technicians said it was the first time they understood how to respond to leaks. We may request them for a follow-up drill.”
HR Officer, Apparel Manufacturing Unit
“Our garment unit required machine safety awareness for new joiners. Elion kept it interactive and used visuals from our own plant, which the workers related to.”
Operations Manager, Steel Trading Yard
“The crane and material handling training helped reduce near misses in our yard. The trainer also gave tips that were not in the slides, based on their field experience. That made a difference.”
Admin Manager, IT Park
“We requested a training module on emergency evacuation procedures. Elion included site-specific examples which helped. The mock drill later was well-coordinated too. Our fire wardens felt more confident after the session.”
Frequently Asked Question (FAQs)
Adjusting protective relays for selective tripping during faults.
To isolate only the faulted section while keeping the rest operational.
IS 3231, IEC 60255, IEEE 242, IEEE 399.
ETAP, PowerFactory, Dialux (for lighting coordination when relevant).
Graphs showing time-current behavior of relays for coordination visualization.
SLDs, equipment ratings, relay specs, fault data.
Calculation of fault levels to determine relay settings.
Yes, upon request.
Yes, by timely isolation during faults.
Every 3-5 years or after major system changes.
Without coordination:
- Multiple breakers might trip together.
- Healthy parts of the system may shut down unnecessarily.
- Equipment like motors, transformers, and switchgear can get damaged.
- Downtime and maintenance costs may rise.
The process includes:
✔ Collecting system data (diagrams, relay specs)
✔ Short-circuit and load flow analysis
✔ Analyzing time–current curves (TCCs)
✔ Calculating optimal relay settings
✔ Verifying coordination outcomes
✔ Preparing a detailed report and recommendations.
We recommend reviewing and updating your coordination study:
Every 3–5 years, or
After major system changes like new equipment, expanded loads, or protection upgrades.