Operation Mode Selection - ABB RELION REX640 Technical Manual

1MRS759142 C
9.10.5.3
REX640
Technical Manual
The tap changer position value is given in parentheses. For example, (0) indicates that
there is no tap changer position connected or the quality of the tap changer position
value is bad. Typically, if no tap changer position is connected, all the TPOSYLTC
binary inputs are FALSE by default and the value shown is (0). A value other than zero
indicates bad quality. OL5ATCC treats a bad-quality tap changer position as
unconnected tap position information.

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 1411: Active operation mode when Operation mode setting is "Manual", "Auto single",
"Parallel manual" or "Auto parallel"
Operation mode Parallel mode
Manual -
Auto single -
Parallel manual Master
Table continues on next page
Control functions
MSTR_TRIGG OPR_MODE_STS
- Manual
- Auto single
- Parallel manual
Section 9
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