ABB REF611 - Inputs

Section 5 Protection relay's physical connections
5.1 Inputs
5.1.1 Energizing inputs
5.1.1.1 Phase currents
The protection relay can also be used in single or two-phase
applications by leaving one or two energizing inputs unoccupied.
However, at least terminals X120:7-8 must be connected.
Table 27: Phase current inputs included in configurations A, B and C
Terminal Description
X120:7-8 IL1
X120:9-10 IL2
X120:11-12 IL3
5.1.1.2 Residual current
Table 28: Residual current input included in configurations A, B and C
Terminal
Description
X120:13-14 Io
5.1.1.3 Residual voltage
Table 29: Additional residual voltage input included in configuration A
Terminal
Description
X120:5-6 Uo
Table 30: Additional residual voltage input included in configuration C
Terminal
Description
X130:17-18 Uo
1MRS757456 D Section 5
Protection relay's physical connections
REF611 173
Application Manual