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Synchro-check and energising-check
(SYRW)
U-Line
)LJXUH 6\QFKURFKHFN
6\QFKURFKHFN VLQJOH FLUFXLW EUHDNHU
The circuit breaker can be closed when the conditions for FreqDiff, PhaseDiff, and
UDiff are fulfilled with the UHigh condition.
∆U
SYRW
AUTOOK
∆f
SYRW
MANOK
∆ ϕ
)LJXUH &RQQHFWLRQ RI WKH V\QFKURFKHFN IXQFWLRQ
U-Bus
SYRW
ULHigh>30-100% U1b
UBHigh>30-100% U1b
UDiff<5-60% Ur
PhaseDiff<5-75°
FreqDiff<50-300mHz
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Fuse fail
U-Line
Fuse fail
en02000563.vsd
UL1
U-Line
UN
U5
U-Bus
UN
en02000564.vsd
&KDSWHU
&RQWURO
Line
reference
voltage
163
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