4.29
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Control Logic
Relay Word Bits
21 87O1 Restrained differential element 1 operating current above O87P
87O2 Restrained differential element 2 operating current above O87P
87O3 Restrained differential element 3 operating current above O87P
50GC Combined residual current sensitivity threshold exceeded
50G4 W4 residual current sensitivity threshold exceeded
32IR 32I element reverse (external) fault declaration
32IF 32I element forward (internal) fault declaration
REFP Restricted Earth Fault inverse-time O/C element timed-out
22 51PC1 Windings 1 and 2 phase inverse-time O/C element picked up
51PC1T Windings 1 and 2 phase inverse-time O/C element timed out
51PC1R Windings 1 and 2 phase inverse-time O/C element is reset
51NC1 Windings 1 and 2 residual inverse-time O/C element picked up
51NC1T Windings 1 and 2 residual inverse-time O/C element timed out
51NC1R Windings 1 and 2 residual inverse-time O/C element is reset
DC1 DC battery voltage level 1 exceeded
DC2 DC battery voltage level 2 exceeded
23 51PC2 Windings 3 and 4 phase inverse-time O/C element picked up
51PC2T Windings 3 and 4 phase inverse-time O/C element timed out
51PC2R Windings 3 and 4 phase inverse-time O/C element is reset
51NC2 Windings 3 and 4 residual inverse-time O/C element picked up
51NC2T Windings 3 and 4 residual inverse-time O/C element timed out
51NC2R Windings 3 and 4 residual inverse-time O/C element is reset
DC3 DC battery voltage level 3 exceeded
DC4 DC battery voltage level 4 exceeded
24 RB1 Remote bit RB1 asserted
RB2 Remote bit RB2 asserted
RB3 Remote bit RB3 asserted
RB4 Remote bit RB4 asserted
RB5 Remote bit RB5 asserted
RB6 Remote bit RB6 asserted
RB7 Remote bit RB7 asserted
RB8 Remote bit RB8 asserted
25 RB9 Remote bit RB9 asserted
RB10 Remote bit RB10 asserted
RB11 Remote bit RB11 asserted
RB12 Remote bit RB12 asserted
RB13 Remote bit RB13 asserted
RB14 Remote bit RB14 asserted
RB15 Remote bit RB15 asserted
RB16 Remote bit RB16 asserted
Table 4.10 Relay Word Bit Definitions (Sheet 5 of 12)
Row Bit Definition
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