2-52 Relay Element Settings
Date Code 20020206 SEL-300G Instruction Manual
Pole Open Logic Setting Calculation
Recommendations
Set 50LP to its minimum value. When the generator current is extremely low, the relay will rely
on the 52A input status to indicate breaker position. Set 3POD = 0 cycles unless your
application requires a specific time-delayed dropout.
INADVERTENT ENERGIZATION PROTECTION
The SEL-300G Relay Inadvertent Energization protection function is provided by the INAD
SEL
OGIC Control Equation. Refer to Section 4: SELOGIC
®
Control Equations for complete
details and a setting example.
BREAKER FAILURE PROTECTION
In some protection topologies, the SEL-300G Relay SELOGIC Control Equations and
nondedicated overcurrent elements can provide breaker failure protection. Refer to Section 4:
SEL
OGIC
®
Control Equations for complete details and a setting example.
DIFFERENTIAL PROTECTION
Settings for the ground differential (87N) elements provided by relay Models 0300G0 and
0300G2 and the percentage restrained differential (87) elements provided by relay models
0300G1 and 0300G3 are described in Section 13: Differential Element Settings.
SYNCHRONISM CHECKING
Settings for the optional synchronism checking function provided by relay models 0300G2 and
0300G3 are described in Section 4: SEL
OGIC
®
Control Equations.
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