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Date Code 20171021
Instruction Manual
SEL-421 Relay
SEL-421 Relay
Instruction Manual
S E C T I O N
1 1
Relay Word Bits
This section contains tables of the Relay Word bits available within the SEL-421
Relay.
lists the Relay Word bits in alphabetic order;
through
list every Relay Word bit row and the bits contained within
each row.
Alphabetical List
Table 11.1
Alphabetic List of Relay Word Bits (Sheet 1 of 34)
Name
Description
Row
25A1BK1
Circuit Breaker 1 voltages within Synchronism Angle 1
38
25A1BK2
Circuit Breaker 2 voltages within Synchronism Angle 1
40
25A2BK1
Circuit Breaker 1 voltages within Synchronism Angle 2
39
25A2BK2
Circuit Breaker 2 voltages within Synchronism Angle 2
40
25ENBK1
Circuit Breaker 1 synchronism-check element enable
38
25ENBK2
Circuit Breaker 2 synchronism-check element enable
40
25W1BK1
Circuit Breaker 1 Angle 1 within Window 1
38
25W1BK2
Circuit Breaker 2 Angle 1 within Window 1
40
25W2BK1
Circuit Breaker 1 Angle 2 within Window 2
38
25W2BK2
Circuit Breaker 2 Angle 2 within Window 2
40
271P1
Undervoltage Element 1, Level 1 asserted
384
271P1T
Undervoltage Element 1, Level 1 timed out
384
271P2
Undervoltage Element 1, Level 2 asserted
384
272P1
Undervoltage Element 2, Level 1 asserted
384
272P1T
Undervoltage Element 2, Level 1 timed out
384
272P2
Undervoltage Element 2, Level 2 asserted
384
273P1
Undervoltage Element 3, Level 1 asserted
385
273P1T
Undervoltage Element 3, Level 1 timed out
385
273P2
Undervoltage Element 3, Level 2 asserted
385
274P1
Undervoltage Element 4, Level 1 asserted
385
274P1T
Undervoltage Element 4, Level 1 timed out
385
274P2
Undervoltage Element 4, Level 2 asserted
385
275P1
Undervoltage Element 5, Level 1 asserted
386
275P1T
Undervoltage Element 5, Level 1 timed out
386
275P2
Undervoltage Element 5, Level 2 asserted
386
276P1
Undervoltage Element 6, Level 1 asserted
386
276P1T
Undervoltage Element 6, Level 1 timed out
386
Summary of Contents for SEL-421-4
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