SEL Relay Settings Sheet

Generate relay settings documentation for SEL protective relays. Captures all required protection functions, CT/PT ratios, and trip/alarm setpoints.

Relay Information

Project Name

Relay Tag / ID

SEL Model

Application

System Parameters

Nominal Voltage (kV)

CT Ratio (Primary)

CT Ratio (Secondary)

PT Ratio (Primary)

PT Ratio (Secondary)

System Frequency

Full Load Current (A primary)

Max Fault Current (A sym)

Protection Functions

51 — Phase Time Overcurrent

Curve Type

Pickup (A secondary)

Time Dial

50 — Phase Instantaneous Overcurrent

Pickup (A secondary)

Time Delay (cycles)

51N — Ground Time Overcurrent

Curve Type

Pickup (A secondary)

Time Dial

50N — Ground Instantaneous Overcurrent

Pickup (A secondary)

Time Delay (cycles)

27 — Undervoltage

Pickup (V secondary)

Time Delay (sec)

Action

59 — Overvoltage

Pickup (V secondary)

Time Delay (sec)

Action

81 — Under/Over Frequency

Under Freq (Hz)

Over Freq (Hz)

Time Delay (sec)

Output Contacts & Logic

Trip & Alarm Logic (describe desired trip/close/alarm assignments)

Notes

Generates a formatted relay settings document.

🔧 SEL Relay Settings Sheet