7SR210 & 7SR220 Description of Operation
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Figure 5.6-1 Logic Diagram: Trip Circuit Supervision Feature (74TCS) ............................................. 81
Figure 5.6-2 Logic Diagram: Close Circuit Supervision Feature (74CCS) .......................................... 82
Figure 5.7-1 Logic Diagram: Harmonic Block Feature (81HBL2) ........................................................ 82
Figure 5.8-1 Logic Diagram: Over Fluxing Detector (81HLB5) ........................................................... 83
Figure 5.9.1-1 Logic Diagram: Load Blinder Three-Phase ............................................................. 84
Figure 5.9.2-1 Logic Diagram: Load Blinder Single-Phase ............................................................ 85
Figure 5.9.2-2 Load Blinder and Angle .......................................................................................... 86
Figure 6.3.7-1 Energy Direction Convention .................................................................................. 91
LIST OF TABLES
Table 1.5-1 Ordering Information – 7SR21 Non-Directional Overcurrent ............................................. 9
Table 1.5-2 Ordering Information – 7SR22 Directional Overcurrent .................................................. 12
Table 2.1-1 Summary of Overcurrent Relay Configurations .............................................................. 15
Table 6.5-1 Operation Mode ............................................................................................................ 93
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