ABB REF615 - Unbalance Protection

A070976 V1 EN
Figure 78: Transient earth-fault situation and operation of INTRPTEF during a
fault
5.3 Unbalance protection
5.3.1 Negative phase-sequence current protection NSPTOC
5.3.1.1 Identification
Table 66: Function identification
IEC 61850 identification:
NSPTOC
IEC 60617 identification: I2>
ANSI/IEEE C37.2 device number: 46
Section 5 1MRS756378 D
Protection functions
158 REF615
Application Manual