ABB SYN 5201 Operating Instructions Manual page 37

Operating Instructions
Procedure:
1. Pre-settings:
2. All other commissioning work (especially calibration of the measuring voltages) must
have been completed.
3. Connect external plotter with the following measuring values:
Channel 1: instantaneous voltage difference u1 – u2
Channel 2: paralleling command
Channel 3: generator power P
Time: 20 to 50 ms/DIV
Trigger set to paralleling command
4. Set SYNCHROTACT 5 to Ready
5. The machine must be in operation; voltages present on both sides of the circuit
breaker
6. First carry out blind synchronization several times and check whether the paralleling
takes place at the correct time.
7. Carry out live synchronization
- Start SYNCHROTACT 5
- Observe synchronizing process using SynView's actual values tool or
synchronizing instruments
8. Wait for the end of the synchronizing process
9. Read SynView transient recorder or external plotter
10. The envelope end of the instantaneous voltage difference should be at a minimum
when the main contacts (P or IG) close. If closing took place too late, t on must be
increased, if it took place too early ton must be reduced.
Correct value carefully!
Caution
Repeat points 7 to 10 until the circuit breaker closes at the correct time, i.e., P or IG are
at a minimum following synchronizing.
Paralleling command duration tp on
Normally, this parameter does not need to be set.
The duration of the paralleling command must be at least long enough, in order to
ensure that the CB (close circuit) is opened. If tp on is set to OFF or zero, the command
generation is no longer in operation. The device then functions like a synchrocheck: as
soon as the release has been given by the monitoring, the contacts close; when the
release is dropped they open again.
Monitoring time t supervis
The monitoring time plays a role with synchronous sources or in dead bus situations.
The command is given if all conditions are fulfilled for this time. With asynchronous
sources (generator), the time should generally not be changed from its default value or
at least it should not be set <10 s.
In synchrocheck operation, i.e. with command generation switched off (tp on = OFF or
0), t supervis has no influence. The command release occurs immediately when all
conditions are fulfilled.
abb
ABB Switzerland Ltd
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- Set t on to 100 ms as an approximation
- Reduce  smax temporarily to the range from 0.1 to 0.2 %
or current I
G
Document No Art Part
3BHS109762 E01
SYN 5201/SYN 5202
G
Language
en
Revision page
D 37