358 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS CHAPTER 7: PROTECTION
Incomplete Sequence Time
Range: 0 to 655.35 seconds in steps of 0.01
Range: 5.00 seconds
This setting specifies the maximum time interval allowed for a single reclose shot. It is
started whenever a reclosure is initiated and is active until the CLOSE BKR1 or CLOSE BKR2
signal is sent. If all conditions allowing a breaker closure are not satisfied when this time
expires, the scheme goes to lockout. The minimum permissible setting is established by
the
3-Pole Dead Time 2 timer setting. Settings beyond this determine the wait time for
the breaker to open so that the reclose cycle can continue and/or for the
Pause signal to
reset and allow the reclose cycle to continue and/or for the AR BKR1(2) BLK signal to
disappear and allow the AR CLOSE BKR1(2) signal to be sent.
Block Breaker 2
Range: any FlexLogic operand or shared operand
Default: Off
This setting selects an operand to block the reclose command for breaker 2. This
condition can include breaker low air pressure, reclose in progress on another line (for
the central breaker in a breaker and a half arrangement), or a sum of conditions
combined in FlexLogic.
Close Time Breaker 2
Range: 0.00 to 655.35 seconds in steps of 0.01
Default: 0.10 seconds
This setting specifies the closing time for breaker 2 from the moment the CLOSE
command is sent to the moment the contacts are closed.
Transfer 1 to 2
Range: Yes, No
Default: No
This setting establishes how the scheme performs when the breaker closing sequence is
“1-2” and Breaker 1 is blocked. When set to “Yes,” the closing command is transferred
directly to breaker 2 without waiting for the set transfer time. When set to “No,” the
closing command is blocked by the AR BKR1 BLK signal and the scheme is sent to lockout
by the incomplete sequence timer.
Transfer 2 to 1
Range: Yes, No
Default: No
This setting establishes how the scheme performs when the breaker closing sequence is
“2-1” and breaker 2 is blocked. When set to “Yes,” the closing command is transferred
direct to breaker 1 without waiting the transfer time. When set to “No,” the closing
command is blocked by the AR BKR2 BLK signal and the scheme is sent to lockout by the
incomplete sequence timer.
Breaker 1 Failure Option
Range: Continue, Lockout
Default: Continue
This setting establishes how the scheme performs when the breaker closing sequence is
“1-2” and breaker 1 has failed to close. When set to “Continue,” the closing command is
transferred to breaker 2, which continues the reclosing cycle until successful (the
scheme resets) or unsuccessful (the scheme goes to lockout). When set to “Lockout,” the
scheme goes to lockout without attempting to reclose breaker 2.
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