IEC13000252-1-en.vsd
7.
Manually execute Raise commands to step up the tap changer one step for all transformers in
the parallel group
8.
Check that the value of
BUSVOLT
is below overvoltage blocking level
OVPartBK
and above the
undervoltage blocking level
UVPartBK
.
9.
Set the control mode to
Auto
for each transformer in the parallel control group
The Master in the parallel group will issue a Lower command after time delay t1, which will also
be repeated by the Follower transformers in the group.
10.
Set Transformer 2 to Master of the parallel group and T1 to Follower (in that order) and repeat
steps 7 to 10. Undertake this same test by setting each Transformer in turn to Master
11.
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 and the other transformers in the
parallel grouper set as Follower. Without allocating a new Master, set T1 to Follower and note
the
Automatic
block state on the local HMI for all parallel transformers
12.
Restore T1 to Master of the parallel transformer group and ensure that control mode for each
transformer is
Automatic
.
12.1.5
Completing the test
SEMOD176327-287 v3
After the test is completed and relevant disturbance records are saved to document the test, go to
Main menu /Clear
on the local HMI and clear all LEDs, the process eventlist and disturbances from
the IED.
1MRK 511 403-UEN Rev. L
Section 12
Primary injection testing
Bay control REC670
211
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Summary of Contents for REC670
Page 1: ...Relion 670 SERIES Bay control REC670 Version 2 2 IEC Commissioning manual ...
Page 2: ......
Page 28: ...22 ...
Page 54: ...48 ...
Page 60: ...54 ...
Page 66: ...60 ...
Page 90: ...84 ...
Page 212: ...206 ...
Page 218: ...212 ...
Page 232: ...226 ...
Page 240: ...234 ...
Page 241: ...235 ...