Electrical · Power Transmission & Distribution
Substation Protection & Relay Coordination
Intermediate 5 weeks 35-60 hours
Build a two-zone protection model with current sensors and relays representing substation feeders. Demonstrate selective tripping so only the faulted zone isolates.
Major
Electrical
Focus area
Power Transmission & Distribution
Total hours
35-60 hours
What you'll need
- Arduino Mega 2560 R3 microcontroller board
- ACS712 20A current sensor module 3 pack
- 5V 4-channel relay module for Arduino
- 16x2 LCD display module with I2C for Arduino
- high power resistor assortment kit
- LED and push button assortment kit for Arduino
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Steps
- Draw a two-zone protection scheme and set a trip current and time delay for each relay.
- Build two feeder circuits with resistor loads, current sensors, and relays.
- Program the Arduino to trip a relay when current in its zone stays above its setting.
- Simulate a fault in each zone by adding load and confirm only that zone trips.
- Adjust time delays until the relays coordinate correctly every time.
- Document the scheme, settings, and test results for your portfolio.
What to photograph for your portfolio
- Two-zone protection build
- selective tripping demo
- coordination timing plots
- fault logs
Resume bullet starters
Copy one, then swap in your own numbers.
Designed and built a substation protection & relay coordination using Substation protection, relay coordination, Arduino
Applied fault analysis to implement, test, and validate the system end-to-end
Skills you'll show off
Substation protectionrelay coordinationArduinofault analysis