Direct Grounded System - ABB REL650 Applications Manual

Section 8
Voltage protection
8.3.3.3
264
ANSI07000190 V1 EN
Figure 123: Ground fault in Non-effectively grounded systems

Direct grounded system

In direct grounded systems, an ground fault on one phase indicates a voltage collapse in
that phase. The two healthy phases will have normal phase-to-ground voltages. The
ANSI07000190-1-en.vsd
1MRK 506 334-UUS A
Application manual