At least one of the 8 synchronization function groups must be configured as available under address 161 to
168 (see Section 2.1.1.1 Setting Notes). The operation mode is thereby already preselected. In addition the
used SYNC function group must be switched on under the address 6X01 ON. It is communicated to the device
with the selection of the synchronizers which parameter block and thus which message from the setting
values are valid. If no parameter block or more than one is selected, the device is automatically blocked. If
asynchronous systems should be connected , the previously determined time must be entered under param-
eter 6120T-CB close under margin heading “Measuring the Operating Time of the Circuit Breaker”.
Important Test Steps
•
The initiation of the device via the start input occurs after selection of the synchronizers
•
Observe the device during the synchronization (measured values, LEDs, annunciations)
•
After CLOSE command, the following final checks have to be carried out:
– Correct indication via LED, signal contacts and if necessary Bus
– Reading out the event puffer (operational messages, disturbance indications) and checking on plau-
sibility
– Reading out the fault record and evaluate the connection
Additional information regarding the individual synchronization conditions is given below.
Asynchronous Systems
The generator in general is here positioned via the corresponding automatic operating mode approximated to
the synchronization conditions and afterwards the parallel switching device is started. The fine adjustment is
performed via the control output. If the measured values are within the setting limits, the device determines
the next instant at which the two systems are in phase from the angle difference and the frequency differ-
ence. The close command is issued at a time before synchronization corresponding to the operating time of
the circuit breaker. The duration of the close command is set in address6127T CLS CMD MIN.
The device performs the checks until the switching conditions are fulfilled, the maximum duration is 6112 T-
SYN. DURATION.
If you are not satisfied with the fine adjustment of the control outputs, a modification of the setting parame-
ters and a repeated synchronization take place.
In order to make more checks is advised to read out again the synchronization record and to evaluate. In
contrast to Figure 3-26, the “hot” synchronization after closing the circuit breaker poles has a zero differential
voltage.
Synchronous Systems
As soon as all synchronism conditions after the starting are fulfilled, the messages „Sync synchron 1“ and are
issued and the CLOSE command is provided after release of time delay T SYNC-DELAY. The duration of the
close command is set in address 6127 T CLS CMD MIN.
If not all synchronization conditions are fulfilled, the device continues checking until the monitoring time
6112 T-SYN. DURATION expires. The device then starts itself automatically.
The behaviour of the device can be checked in the operational measured values. If necessary a correction of
the setting parameters can be carried out in the event of switching status and systems conditional deviations.
Synchrocheck
The interaction with the manual synchronization is checked: The generator is manually synchronized and the
behaviour with the fault record is documented. The record can be compared with the Figure 3-28. The
switching poles close delayed by the closing time after release and manual CLOSE. All differential quantities
are now zero.
Consider when selecting 1ph Sync check under address 161 to 168, that this selection has a fixed alloca-
tion between SYNC function groups and voltage channels (see the setting notes of the synchronization func-
tion). An additional aid for the connection check are the messages
Sync U2<U1
,
Sync U2>U1
, and
Sync
α2<α1
,
Sync α2>α1
(see “Spontaneous messages”.
Mounting and Commissioning
3.3 Commissioning
SIPROTEC 4, 7VE61 and 7VE63, Manual 189
C53000-G1176-C163-3, Edition 10.2017
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