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Distance Relay Settings Calculator

Line Parameters (Primary)

Line Length (miles)

System Voltage (kV L-L)

Z1 (Ω/mile)

Z1 Angle (°)

Z0/Z1 Magnitude Ratio

Z0 Angle (°)

Instrument Transformers

CT Ratio

PT Ratio

Zone Coverage (%)

Zone 1

Zone 2

Zone 3

Zone 4 (Reverse)

Time Delays

Zone 1 (cycles)

Zone 2 (cycles)

Zone 3 (cycles)

Zone 4 (cycles)

Zone Reaches

Zone 1

--

Ω (primary)

Zone 2

--

Ω (primary)

Zone 3

--

Ω (primary)

Zone 4

--

Ω (primary)

Relay Settings (Secondary Ohms)

Z1MAG -- Ω secondary

Z1ANG -- degrees

Z2MAG -- Ω secondary

Z3MAG -- Ω secondary

Z4MAG -- Ω secondary

k0M -- (magnitude)

k0A -- degrees

Zone Diagram

Show Calculations