9.10.5.3 Operation mode selection
OL5ATCC has the
Operation mode
and
Parallel mode
settings for selecting the
desired operation mode. The
Operation mode
setting can have any of the following
values: "Manual", "Auto single", "Parallel manual", "Auto parallel", "Input control" and
“Command”. If the
Operation mode
setting is set to "Input control", the active
operation mode is determined by the inputs PARALLEL and AUTO.
The PARALLEL input defines if the transformer (voltage regulator) is in parallel or
single mode. The AUTO input defines if the operation is in auto or manual mode.
The PARALLEL and AUTO outputs represent acting “Parallel or single operation” and
“Auto/Manual indication”, respectively.
When the
Operation mode
setting is set to "Command", the active operation mode
is determined by the IEC 61850 command data points Auto and ParOp.
Furthermore, if the operation mode has been set to any parallel mode, that is
"Parallel manual" or "Auto parallel" via the
Operation mode
setting, binary inputs or
commands, the parallel mode is selected by the setting
Parallel mode
.
The
Parallel mode
setting can have any of following values: "Master", "Follower",
"NRP", "MCC", "Input control" or "Command".
If the
Parallel mode
setting is set to "Input control", the active operation mode is
determined by the input MSTR_TRIGG.
When the
Parallel mode
setting is set to "Command", the active operation mode is
determined by the IEC 61850 command data point MstrOp.
MSTR_TRIGG is a rising edge input, that is, the master role is kept even though
the MSTR_TRIGG input changes from “true” to “false”. This functionality is used
because another parallel transformer must be able to assume the master role even
though the MSTR_TRIGG input has remained in “true” state. Switching between
operation mode states resets the internal master set. However, switching between
Auto master mode and Parallel manual mode keeps the master role.
Table 1571: Active operation mode when Operation mode setting is "Manual",
"Auto single", "Parallel manual" or "Auto parallel"
Operation mode Parallel mode MSTR_TRIGG OPR_MODE_STS
Manual – – Manual
Auto single – – Auto single
Parallel manual Master – Parallel manual
Parallel manual Input control Com-
mand
0
1
Manual
Parallel manual Input control Com-
mand
1
1
Parallel manual
Auto parallel Master – Auto master
Auto parallel Follower – Auto follower
Auto parallel MCC – MCC
Auto parallel NRP – NRP
Table continues on the next page
1
The master role is set on rising edge and internally kept until another parallel transformer
assumes the master role, or the operation mode is changed.
1MRS759142 F Control functions
REX640
Technical Manual
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