Protection
Protection Module Configuration with IMx-M Manager
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SKF Multilog On-Line System IMx-M
User Manual
Table 2-31: Relay voting 2 out of 2.
Relay Voting “Two out of Two” Candidates
Ch 1 Condition
Ch 2 Condition
Relay State
Normal
Normal
Not Triggered
Normal
Not OK
Not Triggered
Normal
Alert or Danger
Not Triggered
Not OK
Normal
Not Triggered
Not OK
Not OK
Triggered
Not OK
Alert or Danger
Triggered
Alert or Danger
Normal
Not Triggered
Alert or Danger
Not OK
Triggered
Alert or Danger
Alert or Danger
Triggered
Now let’s look at the state 2oo3 (Two out of Three). Again, assuming that the relay type
is set to “Alert or Not OK”, t
hen each channel will submit an alarm candidate if its
condition is either “Not OK”, or is in “Alert or Danger”.
Table 2-32: Relay voting 2 out of 3.
Relay Voting “Two out of Three” Candidates
Ch 1 Condition
Ch 2 Condition
Ch 3 Condition
Relay State
Normal
Normal
Normal
Not Triggered
Normal
Normal
Not OK
Not Triggered
Normal
Normal
Alert or Danger
Not Triggered
Normal
Not OK
Normal
Not Triggered
Normal
Not OK
Not OK
Triggered
Normal
Not OK
Alert or Danger
Triggered
Normal
Alert or Danger
Normal
Not Triggered
Normal
Alert or Danger
Not OK
Triggered
Normal
Alert or Danger
Alert or Danger
Triggered
Not OK
Normal
Normal
Not Triggered
Not OK
Normal
Not OK
Triggered