The operation of the Change lock function can be activated or deactivated here.
9.2.5
Differential protection
9.2.5.1
Overview
This group of settings covers differential protection of transformers. The system
needs rated data to function properly. If the protection object is for example, a
transformer, the rated current and voltage per winding as well as other relevant data
will be needed. The submenus under differential protection contain many other
settable parameters such as connection type (line side or busbar side), tap positions,
CT ratings etc. The data required depends on the protected object.
9.2.5.2
Generator differential protection GENPDIF
Main menu/Settings/General settings/Differential protection/
GeneratorDiff(PDIF,87G)/GDP
Parameters for base current and inverted current are available here.
9.2.5.3
Transformer differential protection, two winding T2WPDIF
Main menu/Settings/GeneralSettings/Differential protection/
TransformerDiff2Wind(PDIF,87T)/T2D
Parameters for available instances of T2WPDIF can be set here. These include the
rated voltages and currents for windings, the connection types, the current
transformer ratings and various other parameters.
9.2.5.4
Transformer differential protection, three winding T3WPDIF
Main menu/Settings/General settings/ Differential protection/
TransformerDiff3Wind(PDIF,87T)/T3D
Parameters for T3WPDIF can be set here. These include rated voltages and
currents, connection types (Y, D), current transformer ratings and various other
parameters.
9.2.6
Control
9.2.6.1
Apparatus control
Overview
Under Control in General settings, parameters for Apparatus control can be
adjusted. These are the parameters for among others Bay control, Switch controller,
1MRK 502 014-UEN C
Section 9
Read and change settings
43
Operator's manual
