ABB RELION REB500 Technical Manual page 37

1MRK 505 406-UEN B
Text
I
Start
I
min
3I
0min
3U
0min
XA
XB
RA
RB
RLoad
AngleLoad
Uweak
IEC19000403 V1 EN-US
Figure 2:
Bay protection functions REB500
Technical manual
Explanation
Pick-up setting of the overcurrent starters (only effective providing starting mode
set to I>)
Setting of the low current check feature for enabling the protection.
Neutral current (3I
Neutral voltage (3U
Reactive reach of the impedance characteristic in the tripping direction.
Reactive reach of the impedance characteristic in the restraint direction.
Resistive reach of the impedance characteristic in the tripping direction.
Resistive reach of the impedance characteristic in the restraint direction.
Resistive reach for avoiding load encroachment.
Limit phase-angle for avoiding load encroachment.
Phase-to-neutral setting for detecting a weak infeed or a dead line for enabling
manually energizing the line. The function is blocked when set to zero.
X
27°
XA
Direc-
tional
OR
- RLoad
- RB
- XB
Underimpedance starter settings
© Copyright 2019 ABB. All rights reserved
) setting for detecting ground faults.
0
) setting for detecting ground faults.
0
Load angle
RLoad
RA
R
27°
Directional
(tripping direction)
18000001-IEC19000403-1-en.vsdx
Section 5
Bay protection functions
31