ABB RELION REB500 Technical Manual page 126

Section 5
Bay protection functions
Signal
FreqDifOK
LiveBus
DeadBus
LiveLine
DeadLine
1) See Table
2) Parts of the function effected by the blocking inputs:
Assuming that both busbar input channels have been configured (double busbars), the active blocking input
depends on the statuses of the binary inputs
See Table
Assuming that only the first busbar input channel has been configured —
active.
The active blocking inputs are connected internally to an OR gate and the CB close enabling outputs are
blocked, if one of them is set to
3) See Table
Table 82: uBus1Activ, uBus2Activ
uBus1Activ
(T) TRUE
(F) FALSE
Other conditions
Table 83: BlkSynchBus1, BlkSynchBus2, BlkSynchLine
uBus1Activ
(T) TRUE
(F) FALSE
Other conditions
Table 84: OpModeInp1, OpModeInp2
OpModeInp1
(F) FALSE
(F) FALSE
(T) TRUE
(T) TRUE
120
Description
82.
83.
TRUE (T).
84.
uBus2Activ
(F) FALSE
(T) TRUE
The previous blocking input remains active.
uBus2Activ
(F) FALSE
(T) TRUE
The previous blocking input remains active.
OpModeInp2
(F) FALSE
(T) TRUE
(F) FALSE
(T) TRUE
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Signal indicating that the difference of frequency |df|
between the phases used for checking synchronism has
fallen below the value of the setting of
Signal indicating that the busbar is energized. (U >
minVoltage)
Signal indicating that the busbar is de-energized. (U <
'maxVoltage')
Signal indicating that the line is energized. (U > minVoltage)
Signal indicating that the line is de-energized. (U <
maxVoltage)
uBus1Activ and uBus2Activ :
Selected voltage input
uBusInput1 active
uBusInput2 active
Selected voltage input
BlckTrigBus1 and BlckTrigLine
BlckTrigBus2 and BlckTrigLine
Operating-Mode
Mode specified in the control program (Operat.-Mode)
Synchrocheck OR (bus dead AND line live)
Synchrocheck OR (bus live AND line dead)
Synchrocheck OR (bus dead AND line live) OR (bus live
AND line dead)
1MRK 505 406-UEN B
maxFreqDif .
BlckTrigBus1 and BlckTrigLine are
Bay protection functions REB500
Technical manual