Completing The Test - ABB RET670 Installation And Commissioning Manual

Section 14
Primary injection testing
14.1.1.6
212
13. Using the local HMI, set Transformer 2 to Master of the parallel group and
T1 to Follower (in that order) and repeat steps
test by setting each Transformer in turn to Master.
14. Note that voltage regulation will be mutually blocked if no transformer is set
to Master in the parallel group. To confirm this function, set T1 as Master in
the parallel group and allow automatic voltage regulation to occur in a way
that the measured bus voltage is stable around USet. Without allocating a new
Master, set T1 to Follower and note the Automatic block state on the local
HMI for all parallel transformers.
15. Restore T1 to Master of the parallel transformer group and ensure that control
mode for each transformer is Automatic, OperationPAR is set to MF and
settings for USet are restored to normal in the service values.

Completing the test

Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
1MRK 504 088-UEN C
9 to 11. Undertake this same
Installation and commissioning manual