Toshiba GR200 Series - 4.6 Synchronizing check for different network (SYNDIF)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 796 -
Synchronizing check for different network (SYNDIF)
The Synchronizing check function (SYNCHK) is provided for checking for the presence of
voltage or the voltage/frequency-variance when connection between two parts of a network is
required. The SYNCHK function is of benefit where the “Double position controller with
synchronizing-check (DPSY†)” function is used for connection between two parts of a network.
This is because operation of the DPSY function to close the circuit breaker is inhibited until
the SYNCHK function gives permission. The SYNCHK function is made up of two group
functions (SYNCHK01 and SYNCHK02‡). The group function consists of two logic elements:
the former part is to check for the voltage-presence (or absence) on an incoming line and a
running line; the latter part is to check the synchronizing condition between two energized
lines.
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Note: The implementation of such features depends on the selection of hardware and the
configuration of functions. Several IED models do not have its features. To determine whether
its features are implemented in the IED, locate the IED ordering number; and check the order
number at the “G&T position” referring to the comparison table below. For more information,
see Appendix: Ordering .
Table 4.6-1 Comparative table in respective ordering numbers
Sec.
Feature
Ordering No. at “G&T”
33
37
–
Main features
NA
✓
–
Number of functions
–
2
✓: Applicable NA: Not applicable