4.27
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Control Logic
Relay Word Bits
11 50A33 Winding 3 A-phase instantaneous O/C Level 3 element picked up
50B33 Winding 3 B-phase instantaneous O/C Level 3 element picked up
50C33 Winding 3 C-phase instantaneous O/C Level 3 element picked up
50P33 50A33 + 50B33 + 50C33
50A34 Winding 3 A-phase instantaneous O/C Level 4 element picked up
50B34 Winding 3 B-phase instantaneous O/C Level 4 element picked up
50C34 Winding 3 C-phase instantaneous O/C Level 4 element picked up
50P34 50A34 + 50B34 + 50C34
12 50N31 Winding 3 residual definite-time O/C Level 1 element picked up
50N31T Winding 3 residual definite-time O/C Level 1 element timed out
50N32 Winding 3 residual instantaneous O/C Level 2 element picked up
51N3 Winding 3 residual inverse-time O/C element picked up
51N3T Winding 3 residual inverse-time O/C element timed out
51N3R Winding 3 residual inverse-time O/C 51N3 element is reset
NDEM3 Winding 3 residual demand current threshold exceeded
OC3 Breaker 3 OPEN command execution
13 50Q31 Winding 3 neg.-seq. definite-time O/C Level 1 element picked up
50Q31T Winding 3 neg.-seq. definite-time O/C Level 1 element timed out
50Q32 Winding 3 neg.-seq. instantaneous O/C Level 2 element picked up
51Q3 Winding 3 neg.-seq. inverse-time O/C element picked up
51Q3T Winding 3 neg.-seq. inverse-time O/C element timed out
51Q3R Winding 3 neg.-seq. inverse-time O/C 51Q3 element is reset
QDEM3 Winding 3 neg.-seq. demand current threshold exceeded
CC3 Breaker 3 CLOSE command execution
14 50P41 Winding 4 phase definite-time O/C Level 1 element picked up
50P41T Winding 4 phase definite-time O/C Level 1 element timed out
50P42 Winding 4 phase instantaneous O/C Level 2 element picked up
51P4 Winding 4 phase inverse-time O/C element picked up
51P4T Winding 4 phase inverse-time O/C element timed out
51P4R Winding 4 phase inverse-time O/C 51P4 element is reset
PDEM4 Winding 4 phase demand current threshold exceeded
CTS Current transformer saturation (not available in the SEL-387-0
Relay prior to firmware version R602)
15 50A43 Winding 4 A-phase instantaneous O/C Level 3 element picked up
50B43 Winding 4 B-phase instantaneous O/C Level 3 element picked up
50C43 Winding 4 C-phase instantaneous O/C Level 3 element picked up
50P43 50A43 + 50B43 + 50C43
50A44 Winding 4 A-phase instantaneous O/C Level 4 element picked up
50B44 Winding 4 B-phase instantaneous O/C Level 4 element picked up
50C44 Winding 4 C-phase instantaneous O/C Level 4 element picked up
50P44 50A44 + 50B44 + 50C44
Table 4.10 Relay Word Bit Definitions (Sheet 3 of 12)
Row Bit Definition
To Next Page
Loading...