GE Industrial Solutions Entellisys System User Manual - Manual (Page 94)

Multipoint functions 94
7
7.2.1 Setup
7.2.1.1 User settings
Each Multi-Source Ground-Fault relay (Alarm-Only and Trip) can be enabled or disabled in each
zone for each topology (see Figure 7-5). Multi-Source Ground-Fault has one pickup setting, one
time delay setting and one Curve I
2
T setting for each relay (i.e., Alarm-Only and Trip) in each
zone and for each topology. The backup function of the Trip relay (zones 1-4) can be enabled to
operate along with the Trip relay or after a delay of 100 msec by selecting Trip Immediately or
Trip After 100msec from the Backup Time Delta drop-down menu on the Topology Settings tab
as shown in Figure 7-3. These two settings are also topology-specific.
The only setting that is not topology specific on the Topology Settings tab is the Trip/Open
setting that determines whether the Trip relay just opens the circuit breakers (either trip-targets
or backup-trip-targets) or opens and activates the lockout too.
Figure 7-5 Multi-Source GF user settings