ABB RELION 620 Series Technical Manual page 547

1MRS757644 F
4.3.2.7
620 series
Technical Manual
GUID-5E0D15BA-ADA9-4FE0-A85D-5C6E86D7E32B V2 EN
Figure 274: Alternative connection example of current transformers of Type 2
The CT secondary currents often differ from the rated current at the rated load of the
power transformer. The CT transforming ratios can be corrected on both sides of the
power transformer with the CT ratio Cor Wnd 1 and CT ratio Cor Wnd 2 settings.
Signals
Table 484: TR2PTDF Input signals
Name Type
I_A1 SIGNAL
I_B1 SIGNAL
I_C1 SIGNAL
I_A2 SIGNAL
I_B2 SIGNAL
I_C2 SIGNAL
Table continues on next page
Protection functions
Default Description
0 Phase A primary current
0 Phase B primary current
0 Phase C primary current
0 Phase A secondary current
0 Phase B secondary current
0 Phase C secondary current
Section 4
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