Schweitzer Engineering Laboratories SEL-421-4 - Table 5.60 Residual Ground Instantaneous;Definite-Time Line Overcurrent Relay Word Bits

5.96
SEL-421 Relay Instruction Manual Date Code 20171021
Protection Functions
Instantaneous Line Overcurrent Elements
67Q3 Level 3 definite-time negative-sequence directional overcurrent element
67Q4 Level 4 definite-time negative-sequence directional overcurrent element
67Q1T Level 1 time-delayed definite-time negative-sequence directional overcurrent
element
67Q2T Level 2 time-delayed definite-time negative-sequence directional overcurrent
element
67Q3T Level 3 time-delayed definite-time negative-sequence directional overcurrent
element
67Q4T Level 4 time-delayed definite-time negative-sequence directional overcurrent
element
Table 5.60 Residual Ground Instantaneous/Definite-Time Line Overcurrent
Relay Word Bits
Name Description
50G1 Level 1 instantaneous residual ground overcurrent element
50G2 Level 2 instantaneous residual ground overcurrent element
50G3 Level 3 instantaneous residual ground overcurrent element
50G4 Level 4 instantaneous residual ground overcurrent element
67G1 Level 1 definite-time residual ground directional overcurrent element
67G2 Level 2 definite-time residual ground directional overcurrent element
67G3 Level 3 definite-time residual ground directional overcurrent element
67G4 Level 4 definite-time residual ground directional overcurrent element
67G1T Level 1 time-delayed definite-time residual ground directional overcurrent
element
67G2T Level 2 time-delayed definite-time residual ground directional overcurrent
element
67G3T Level 3 time-delayed definite-time residual ground directional overcurrent
element
67G4T Level 4 time-delayed definite-time residual ground directional overcurrent
element
Table 5.59 Negative-Sequence Instantaneous/Definite-Time Line Overcurrent
Relay Word Bits (Sheet 2 of 2)
Name Description