5-342 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS CHAPTER 5: SETTINGS
5
5.8.8 Synchrocheck (ANSI 25)
SETTINGS CONTROL ELEMENTS SYNCHROCHECK SYNCHROCHECK 1(10)
The synchronism check function supervises the paralleling of two parts of a system that are to be joined by the closure of
a circuit breaker. The synchrocheck elements are typically used at locations where the two parts of the system are
interconnected through at least one other point in the system.
SYNCHROCHECK 1
SYNCHK1 FUNCTION:
Disabled
Range: Disabled, Enabled
SYNCHK1 BLOCK:
Off
Range: FlexLogic operand
SYNCHK1 V1 SOURCE:
SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
SYNCHK1 V2 SOURCE:
SRC 2
Range: SRC 1, SRC 2, SRC 3, SRC 4
SYNCHK1 MAX VOLT
DIFF: 10000 V
Range: 0 to 400000 V in steps of 1
SYNCHK1 MAX ANGLE
DIFF: 30°
Range: 0 to 100° in steps of 1
SYNCHK1 MAX FREQ
DIFF: 1.00 Hz
Range: 0.00 to 2.00 Hz in steps of 0.01
SYNCHK1 MAX FREQ
HYSTERESIS: 0.06 Hz
Range: 0.00 to 0.10 Hz in steps of 0.01
SYNCHK1 SYNC CLOSE:
Off
Range: FlexLogic operand
SYNCHK1 S-CLS MAX
dF: 0.50 Hz
Range: 0.10 to 2.00 Hz in steps of 0.01
SYNCHK1 S-CLS MIN
dF: 0.10 Hz
Range: 0.01 to 1.00 Hz in steps of 0.01
SYNCHK1 S-CLS BRK
TIME: 0.035 s
Range: 0.010 to 0.500 s in steps of 0.001
SYNCHK1 V2 MAG CORR
FACTOR: 1.00
Range: 0.10 to 10.00 in steps of 0.01
SYNCHK1 V2 ANGLE
SHIFT: 0
Range: -180 to +180 degrees in steps of 1
SYNCHK1 DEAD SOURCE
SELECT: LV1 and DV2
Range: None, LV1 and DV2, DV1 and LV2, DV1 or DV2,
DV1 Xor DV2, DV1 and DV2
SYNCHK1 DEAD V1
MAX VOLT: 0.30 pu
Range: 0.04 to 1.25 pu in steps of 0.01
SYNCHK1 DEAD V2
MAX VOLT: 0.30 pu
Range: 0.04 to 1.25 pu in steps of 0.01
SYNCHK1 LIVE V1
MIN VOLT: 0.70 pu
Range: 0.04 to 1.25 pu in steps of 0.01
SYNCHK1 LIVE V2
MIN VOLT: 0.70 pu
Range: 0.04 to 1.25 pu in steps of 0.01
SYNCHK1 TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
SYNCHK1 EVENTS:
Disabled
Range: Disabled, Enabled
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