ABB Relion 630 Series, Technical Manual

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3.6.2 Settings
Table 20: BASEPH Non group settings (basic)
Name Values (Range) Unit Step Default Description
Voltage base Val PP 0.01 - 440.00 kV 0.01 20.00 Voltage base value, phase-to-phase
Current base Val Ph 1 - 9999 A 1 400 Current base value, phase
S base value 3Ph 0.05 - 1800000.00 kVA 0.05 13856.00 Three-phase power base value
3.6.3 The principles for voltage settings given in pu
The voltage base value in BASEPH is the phase-to-phase voltage. This means that in
voltage settings related to phase-to-phase voltage, 1.0 p.u. corresponds to 20.00 kV
(assuming the default value for the Voltage base Val PP setting). An example of this
kind of setting is DSTPDIS PP V Ph Sel GFC (the default value 0.8 pu corresponds to
0.8 x 20 kV = 16 kV ).
For the voltage settings that are related to the phase-to-earth voltage, the functions
contain internal scaling factor (0.5774). Therefore for the voltage settings related to
the phase-to-earth voltage, 1.0 results in a nominal phase-to-earth voltage of 11.55
kV, assuming the default value 20.00 kV for the Voltage base Val PP setting. An
example of this kind of setting is PSPTOV Start value (the default value 1.1 pu
corresponds to 1.1 x 0.5774 x 20 kV ≈12.7 kV ).
There are few functions for which the internal scaling is not done. In
these functions it can be selected whether phase-to-phase voltages or
phase-to-earth voltages are used, for example, the Voltage selection
setting in PHPTOV. This also means that the voltage settings in these
functions can be either related to the phase-to-phase voltage or to the
phase-to-earth voltage depending on the selection. In functions, for
example, PHPTOV, PHPTUV and SYNCRSYN, 1.0 p.u.
corresponds to 20.00 kV, assuming the default value for the Voltage
base Val PP setting regardless of the voltages used in the functions. If
the Voltage selection setting in PHPTOV is set to “phase-to-earth”
("1"), a value of 0.64 p.u. for Start value results in 12.8 kV (≈1.1 x
11.55 kV)
3.7 Parameter setting group handling
3.7.1 Functionality
The different groups of settings are used to optimize the IED operation for different
system conditions. By creating and switching between fine-tuned setting sets, either
1MRS757256 F
Section 3
Basic functions
PML630/Compact Load-Shedding Solution 53
Technical Manual