ABB SYN 5201 Operating Instructions Manual page 42

Operating Instructions
9. Write value into the random access memory by pressing:
10. Return to TEST U-Match, set this to OFF and confirm with
11. Temporarily set SYNCHROTACT 5 to "Ready"and block again. This writes all
parameter settings into the ROM.
If the repeated test function does not lead to a reasonable result, the setting value
Note
should be determined empirically as described below.
Voltage adjusting characteristic dU/dt
Factor for the command length which is formed proportionally to the voltage difference.
The setting value is determined using the test function TEST U-Match. Usual setting
values: 0.3 to 0.7 %/s. Adjusting pulses are suppressed if dU/dt is set to zero.
Empirical determination of the setting value:
Aim: a single voltage adjusting command should bring the voltage difference
approximately into the middle of the set tolerance band. To do this, the voltage matcher
must adjust the machine by means of voltage adjusting commands. The operator
checks the command length and corrects it if necessary until the matcher is functioning
satisfactorily.
Procedure:
1. Prevent the circuit breaker from closing while work is being carried out (circuit
breaker in Test position, unplug connector -X6 for the paralleling commands on the
SYNCHROTACT 5,...)
2. Temporarily switch off frequency matcher: set df/dt = 0 and write into the random
access memory.
3. In order that the effect of the adjusting pulse can be better judged: temporarily set
pulse interval ts U to maximum and write into the random access memory.
4. Set SYNCHROTACT 5 to Ready
5. The machine must be in operation: voltages present on both sides of the circuit
breaker; voltage difference outside of the set tolerance window
Read the initial voltage difference  U
6.
7. Start synchronizing process
8. Wait for the end of the voltage adjusting command (LED), then wait until the voltage
difference display shows stable values (5 to 10 s) and read this final voltage
difference
9. Stop SYNCHROTACT 5
10. Calculate value according to the following formula: dU/dt = dU/dt0*(  U0-  U1)/  U0
Key:
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
dU/dt = newly calculated value
dU/dt0 = setting value prior to test
 U0
= initial voltage difference
 U1
= final voltage difference
Document No Art Part
3BHS109762 E01
SYN 5201/SYN 5202
DATA
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DATA
Language Revision page
en D 42