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Synchro-check and energising-check
(SYRW)
•
•
•
The voltage check can also be set Off. A closing impulse can be issued to the circuit
breaker if one of the U-line or U-bus voltages is High and the other is Low, that is, when
only one side is energized. The user can set AutoEnerg and ManEnerg to enable differ-
ent conditions during automatic and manual closing of the circuit breaker.
In the manual mode it is also possible to allow closing when both sides of the breaker
are dead. This is done by setting the parameter ManDBDL = "On" and ManEnerg to
"DLLB", "DBLL" or "Both".
9ROWDJH FRQQHFWLRQ IRU D VLQJOH EXV
SYNCH.CHECK
VOLT SELECTION
SYRW
U-Bus
U-Line
SYRW-UB1OK/FF
)LJXUH 9ROWDJH FRQQHFWLRQ LQ D VLQJOH EXVEDU DUUDQJHPHQW
Figure 73 shows the principle for the connection arrangement. One terminal unit is used
for one bay. For the synchrocheck (SYRW) and energizing check function, there is one
voltage transformer at each side of the circuit breaker. The voltage transformer circuit
connections are straight forward, no special voltage selection is needed.
For the synchrocheck and energizing check, the voltage from Bus 1 (U-Bus 1) is con-
nected to the single phase analog input (U5) on the terminal unit.
Both directions (Both)
Dead line live bus (DLLB)
Dead bus live line (DBLL)
I/O BI
U5
UL1
SYRW-VTSU
AI
UL1
FUSEUB1
FUSEF1
&KDSWHU
Bus 1
U-Bus 1
U5
U-Line 1
FUSEUB1
FUSEF1
en02000566.vsd
&RQWURO
Bay 1
F1
165
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