9.19
Date Code 20060320 Instruction Manual SEL-311C Relay
Setting the Relay
Relay Word Bits (Used in SEL
OGIC Control Equations)
4 51G Residual ground current above pickup setting 51GP for residual
ground time-overcurrent element 51GT (see Figure 3.25)
Testing, Control
51GT Residual ground time-overcurrent element 51GT timed out
(see Figure 3.25)
Tripping
51GR Residual ground time-overcurrent element 51GT reset
(see Figure 3.25)
Testing
LOP Loss-of-potential (see Figure 4.1) Testing, Special directional
control schemes
ILOP Internal loss-of-potential (see Figure 4.1) Distance directional control
enable
ZLOAD ZLOUT + ZLIN (see Figure 4.3) Special phase overcurrent
element control
ZLOUT Load encroachment “load out” element (see Figure 4.3)
ZLIN Load encroachment “load in” element (see Figure 4.3)
5 LB1 Local Bit 1 asserted (see Figure 7.4) Local control via front panel—
replacing traditional panel-
mounted control switches
LB2 Local Bit 2 asserted (see Figure 7.4)
LB3 Local Bit 3 asserted (see Figure 7.4)
LB4 Local Bit 4 asserted (see Figure 7.4)
LB5 Local Bit 5 asserted (see Figure 7.4)
LB6 Local Bit 6 asserted (see Figure 7.4)
LB7 Local Bit 7 asserted (see Figure 7.4)
LB8 Local Bit 8 asserted (see Figure 7.4)
6 LB9 Local Bit 9 asserted (see Figure 7.4)
LB10 Local Bit 10 asserted (see Figure 7.4)
LB11 Local Bit 11 asserted (see Figure 7.4)
LB12 Local Bit 12 asserted (see Figure 7.4)
LB13 Local Bit 13 asserted (see Figure 7.4)
LB14 Local Bit 14 asserted (see Figure 7.4)
LB15 Local Bit 15 asserted (see Figure 7.4)
LB16 Local Bit 16 asserted (see Figure 7.4)
7 RB1 Remote Bit 1 asserted (see Figure 7.10) Remote control via serial port
RB2 Remote Bit 2 asserted (see Figure 7.10)
RB3 Remote Bit 3 asserted (see Figure 7.10)
RB4 Remote Bit 4 asserted (see Figure 7.10)
RB5 Remote Bit 5 asserted (see Figure 7.10)
RB6 Remote Bit 6 asserted (see Figure 7.10)
RB7 Remote Bit 7 asserted (see Figure 7.10)
RB8 Remote Bit 8 asserted (see Figure 7.10)
Table 9.6 Relay Word Bit Definitions for the SEL-311C (Sheet 3 of 16)
Row Bit Definition Primary Application
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