25 - Sync-Check - Eaton EDR-5000 Installation, Operation And Maintenance Manual

25 - Sync-check

Available Elements:
Sync
Sync-check
The sync-check function is provided for the applications where a line has two-ended power sources. The sync-check
function has the abilities to check voltage magnitude, angle differences, and frequency difference (slip frequency)
between the bus and the line. If enabled, the sync-check may supervise the closing operation manually, automatically,
or both.. This function can be overridden by certain bus-line operation conditions and can be bypassed with an external
source.
Voltage Difference ΔV
The first condition for paralleling two electrical systems is that their voltage phasors have the same magnitude. This
can be controlled by the generator's AVR.
The sync-check function can be bypassed by external sources. In this case,
synchronization has to be secured by other synchronizing systems before
breaker closing!
The Bus voltages are to be measured by the first three measuring inputs of the
voltage measuring card (VA/VAB, VB/VBC, VC/VCA). The line voltage is to be
measured by the fourth measuring input of the voltage measuring card (VX). In
the menu [System Para/General Settings/V Sync] the User has to define to which
phase the fourth measuring input is compared.
Bus VA
Line VB
Bus VB
EDR-5000
Line VA
Line VC
www.eaton.com
Bus VC
IM02602007E
629