Micom P634 - Page 441

Parameter Address
Default Min Max Unit Logic Diagram
Ground differential
protection
REF_1: General enable USER
019 050
0: No Fig. 3-99, (p. 3-142)
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REF_2: General enable USER
019 150
0: No
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REF_3: General enable USER
019 250
0: No
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Disabling or enabling the ground fault differential protection.
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REF_1: Select. meas. input
019 100
0: End a
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REF_2: Select. meas. input
019 101
1: End b
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REF_3: Select. meas. input
019 102
2: End c
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Display of the measuring input that provides the measured values evaluated by
the ground differential protection function.
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REF_1: Add.meas.inp. end b
019 120
0: No
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REF_1: Add.meas.inp. end c
019 121
0: No
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REF_1: Add.meas.inp. end d
019 122
0: No
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In case of protecting an autotransformer, select whether this end shall be
considered by the REF function in addition to the phase currents in end a (T14)
and the the neutral-point current.
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REF_1: Reference power Sref
019 031
38.1 0.1 5000.0 MVA Fig. 3-100, (p. 3-144)
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REF_2: Reference power Sref
019 032
38.1 0.1 5000.0 MVA
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REF_3: Reference power Sref
019 033
38.1 0.1 5000.0 MVA
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Setting for the reference power, usually the nominal transformer power for the
relevant transformer end.
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REF_1: Ref. curr. Iref
019 034
Not measured 0.000 50.000 kA Fig. 3-100, (p. 3-144)
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REF_2: Ref. curr. Iref
019 035
Not measured 0.000 50.000 kA
7 Settings P634
P634/EN M/R-42-A // P634‑311‑653 7-87