ABB SYN 5201 Operating Instructions Manual page 36

Operating Instructions
4.2.2 Parameter group Command Generation
Test function for determining the paralleling time TEST ton
When working on high voltage circuits, it is essential that the corresponding regulations
on working on high voltage installations are complied with:
The test function closes the circuit breaker. The plant should therefore be prepared as
described in section 8.2.11.
Further procedure:
1) Start conditions:
2) Change address to the parameter TEST ton in the corresponding parameter set and
in the parameter group "Paralleling cmd gen"
3) Set TEST ton to ON
4) Confirm with
5) Enable test function by pressing:
6) Start test function within 30 s after enable
7) Wait for end of test function then read results for t on and  UOffset
8) Change address to parameter t on (1 *
9) Write the value into the random access memory by pressing
10) Change address to parameter  UOffset (3 *
11) Write the value into the random access memory by pressing
12) Return to TEST ton, set this to OFF and confirm with
13) Set SYNCHROTACT 5 temporarily to "Ready" and block again. This writes all the
parameter settings into the ROM
14) Open the circuit breaker again and bring the plant into the status necessary for the
following work.
Paralleling time t on
The time is required for compensation of the breaker closing time. The closing time of
the circuit breaker, including all intermediate circuits, is measured using the test function
Test t on. If the closing time of the circuit breaker is known, it can be set and stored
directly.
If the paralleling time is not known and the test function cannot be carried out, it must be
Caution
determined empirically:
Aim:
SYNCHROTACT 5 takes into account the run time of the paralleling command and the
closing time of the circuit breaker, i.e. the command is issued with a lead of this time
before the zero passage of the phase-angle difference.
abb
ABB Switzerland Ltd
Template: CHIND Techn doc stand, A4 P de, R1.DOT; Filename: 3BHS109762E01 D.doc; Print: 12/6/2011 5:48:00 PM; Save: 12/1/2011 2:37:00 PM; CHIND No. 3BHS109763 ZAB D14 Rev. -; I-Q
- One voltage is > Umin
- The other voltage is < U0max
- Corresponding parameter set is selected
- Device blocked (blocking: see section 7)
- SYN 5202: Signal 'Release DB' active (so that the paralleling
release contacts of channel 2 close)
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