Parameter: VT1/2/3 Ratio Sec
•
Default setting: 110 V
The setting value is used (in conjunction with VT1/2/3 Ratio Prim setting) by the device instrumen-
tation e.g. to display primary voltage values.
Parameter: VT1/2/3 Nominal
•
Default setting: 63.5 V
This is set to the rated voltage applied to the VT input. The setting will be dependent on the VT Config
setting e.g. phase-phase or phase-neutral Volts may be connected to the VT inputs.
Parameter: VT1/2/3 Trim Magnitude
•
Default setting: 0 V
The setting value is used (in conjunction with VT1/2/3 Ratio Prim setting) by the device instrumen-
tation e.g. to display primary voltage values.
Parameter: VT1/2/3 Trim Angle
•
Default setting: 0°
The setting value is used (in conjunction with VT1/2/3 Ratio Prim setting) by the device instrumen-
tation e.g. to display primary voltage values.
Parameter: VT1/2/3 Config
•
Default setting: Van, Vbn, Vcn
This setting provides the device with the correct voltage inputs i.e. provides inputs configuration appro-
priate to the switchgear VT connections. The VT connections and required settings are illustrated in
Figure 3-7.
Note that the switchgear VT connection may affect the functionality that can be used in the device on the
system e.g. The VT1/2/3 configuration Va, Vb, Vc in Figure 3-7 does not allow zero sequence voltage V
0
to
be measured and so functions requiring this quantity cannot be used when this VT configuration is
selected.
Parameter: VT4 Nominal
•
Default setting: 63.5 V
This is set to the rated voltage applied to the VT input. The setting will be dependent on the VT Config
setting e.g. phase-phase or phase-neutral Volts may be connected to the VT inputs.
Parameter: VT4 Ratio Prim
•
Default setting: 132000 V
The setting value is used (in conjunction with VT1/2/3 Ratio Sec setting) by the device instrumenta-
tion e.g. to display primary voltage values.
Parameter: VT4 Ratio Sec
•
Default setting: 110 V
The setting value is used (in conjunction with VT1/2/3 Ratio Prim setting) by the device instrumen-
tation e.g. to display primary voltage values.
Device Functionality
3.3 CT and VT Inputs
Reyrolle 7SR5, Transformer Protection Device, Device Manual 61
C53000-G7040-C015-1, Edition 11.2019
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