ABB 615 series Technical Manual page 371

1MAC059074-MB A
615 series ANSI
Technical Manual
Voltage pickup value
Transient detection
Fault direction
VG >
Reset timer
PICKUP
Peak counter
TRIP
GUID-013ADFBD-CD8D-4B21-BAFA-73EFE661AD43 V1 EN
Figure 171: Example of 67NIEF operation in "Intermittent EF" mode in the faulty
feeder, Peak counter limit=3
The timer calculates the pickup duration value PICKUP_DUR which indicates the
percentage ratio of the start situation and the set operating time. The value is available in
the monitored data view.
Timer 2
If the function is used in the directional mode and an opposite direction transient is
detected, the BLK_EF output is activated for the fixed delay time of 25 ms. If the PICKUP
output is activated when the BLK_EF output is active, the BLK_EF output is deactivated.
Blocking logic
There are three operation modes in the blocking function. 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.
Residual voltage VG
Residual current IG
FWD FWD
Reset time
1 1 2
Reset time
Reset delay time
Trip delay time
Section 4
Protection functions
Reset delay time
3 4
100ms pulse
365