Selective coordination
The device nearest the fault operates first. Verified on TCC curves across the full fault current range, not just at maximum fault.
Review this service area →Protection schemes that clearthe fault and nothing else.
Coordination studies, relay setting calculations, scheme design, and SCADA or commissioning support where included in the agreed scope — for utility, industrial, and renewable systems.
Service scope
Protection and Control Engineering Services
Coordination studies, relay setting calculations, scheme design, and SCADA or commissioning support where included in the agreed scope — for utility, industrial, and renewable systems.
Equipment protection
Settings that respect equipment damage curves, transformer through-fault withstand, and cable thermal limits.
Review this service area →
Personnel safety
Arc flash incident energy calculated per IEEE 1584, with labelling and PPE requirements per NFPA 70E.
Review this service area →Why eGridSync
Clear the fault, preserve the system
Protection design is most valuable when it solves the actual fault and avoids unnecessary trips.
How our engineers work →Selective coordination
The device nearest the fault operates first. Verified on TCC curves across the full fault current range, not just at maximum fault.
Equipment protection
Settings that respect equipment damage curves, transformer through-fault withstand, and cable thermal limits.
Personnel safety
Arc flash incident energy calculated per IEEE 1584, with labelling and PPE requirements per NFPA 70E.
Software capabilities behind better engineering decisions.
Trusted analysis and design platforms, applied by engineers who understand the system behind the model.
DIgSILENTPower system analysis
ETAPElectrical analysis
EasyPowerArc flash & coordination
SKM PowerToolsPower tools analysis
CYMEDistribution analysis
PSS/ETransmission planning
PSCADEMT simulation
AutoCADDrafting & design
Bentley MicroStationInfrastructure design
SELRelay protection
Our process
From project inputs to decision-ready output.
Coordination studies, relay setting calculations, scheme design, and SCADA or commissioning support where included in the agreed scope — for utility, industrial, and renewable systems.
Model and data verification
Short circuit model, equipment data, existing settings, CT and PT ratios and accuracy class.
Coordination analysis
TCC development across all fault levels, with miscoordination identified and resolved.
Setting calculations
Per-relay calculations with documented basis, in the relay’s own terms.
Setting files
Native files for the relay platform, ready to load.
Commissioning support
Test plan, functional testing, and as-left records suitable for PRC-005 evidence where included in the agreed scope.
protection control FAQ
Questions before the work begins.
01How often should coordination be restudied?
Whenever the system changes in a way that changes fault current or protection: new generation, a transformer replacement, a service upgrade, a new feeder, or a change in utility source impedance.
02Is arc flash a separate study?
It’s a separate deliverable but not a separate analysis. Incident energy depends on available fault current and clearing time.
03Can you reduce incident energy without replacing equipment?
Often, yes. Maintenance-mode settings, instantaneous elements enabled during work, zone-selective interlocking, and revised time-current curves can all lower incident energy substantially.
04Do you work with existing relay settings, or start over?
Either. Reviewing existing settings is usually faster and less disruptive, and often surfaces miscoordination nobody knew about.
05What do you need to start?
Current one-line, utility source data with X/R, transformer nameplate, cable and conductor data, existing relay models and settings, CT and PT ratios and accuracy class, and the protection philosophy if one exists.
06Do you support commissioning in the field?
Field commissioning support can be included where it is part of the agreed scope; availability and location are confirmed during scoping.