ABB RELION 670 Series Technical Manual page 762

Section 14
Control
closing pulses, a maximum closing angle between bus and line is preset internally to a value of 15
degrees.. Table
closing angle of 15 degrees, at different allowed slip frequencies for synchronizing.
Table 446: Dependencies between tBreaker and SlipFrequency with maximum closing angle of 15 degrees
tBreaker [s] (max settable value) with the internally preset
closing angle of 15 degrees
At operation the SYNOK output will be activated with a pulse
The function will also reset if the synchronizing conditions are not fulfilled within the set
tMaxSynch time. This prevents that the function is, by mistake, maintained in operation for a long
time, waiting for conditions to be fulfilled.
The inputs BLOCK and BLKSYNCH are available for total block of the complete SESRSYN function
and block of the Synchronizing function respectively. TSTSYNCH will allow testing of the function
where the fulfilled conditions are connected to a separate output.
756
446 below shows the maximum settable value for
0.040
0.050
0.080
0.200
0.400
0.800
1.000
tBreaker at the preset maximum
SlipFrequency [Hz] (BusFrequency - LineFrequency)
1.000
0.800
0.500
0.200
0.100
0.050
0.040
tClosePulse and the function resets.
1MRK 502 066-UUS B
Technical manual