ABB 615 Series - Page 461

GFCrelease
INTR_EF
PICKUP
TRIP
PEAK_IND
Resettimer
Triptimer
Resetdelaytime Tripdelaytime
IG
VG
GUID-21DD081C-AB4D-4120-A8AB-4F29E2EE4117 V1 EN
Figure 218: Operation in “Intermittent EF” mode, Peak counter limit = 3
Blocking logic
There are three operation modes in the blocking functionality. The operation modes are
controlled by the BLOCK input and the global setting Configuration/System/Blocking
mode which selects the blocking mode. The BLOCK input can be controlled by a binary
input, a horizontal communication input or an internal signal of the protection relay's
program. The influence of the BLOCK signal activation is preselected with the global
setting Blocking mode.
The Blocking mode setting has three blocking methods. In the "Freeze timers" mode, the
operation timer is frozen to the prevailing value. In the "Block all" mode, the whole
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 455
Technical Manual