Siemens SENTRON 3WL10 - Page 74

Enhanced protection functions - only available with
MF Advanced metering function
ETU650 LSI ETU660 LSIG
DST Directed short-circuit protection DST ● ●
Protection function can be enabled/disabled ● ●
Enabling/disabling of tripping on directed (direc‐
tional) short-circuit protection
● ●
Setting range I
dsd
= I
n
x … in forward direction FW
(top→bottom)
0.6 to 10 (in steps of 0.1)
Default value: 2
0.6 to 10 (in steps of 0.1)
Default value: 2
Setting range I
dsd
= I
n
x … in backward direction
BW (bottom→top)
0.6 to 10 (in steps of 0.1)
Default value: 2
0.6 to 10 (in steps of 0.1)
Default value: 2
Switchable short-time-delayed short-circuit pro‐
tection
(inverse-time in relation to I²t)
● ●
Setting range of delay time t
dsd
FW in forward di‐
rection
0.1 to 0.5 s (in steps of 0.01)
Default value: 0.2 s
0.1 to 0.5 s (in steps of 0.01)
Default value: 0.2 s
Setting range of delay time t
dsd
BW in backward
direction
0.1 to 0.5 s (in steps of 0.01)
Default value: 0.2 s
0.1 to 0.5 s (in steps of 0.01)
Default value: 0.2 s
Switchover to alternative operating values with
directed (directional) short-circuit current during
the switch-on phase (inrush adaptation)
for tripping characteristic t=k (󹪝xed) possible
● ●
Setting range of the switch-on phase 0.10 to 30 s (in steps of 0.01)
Default value: 0.1
0.10 to 30 s (in steps of 0.01)
Default value: 0.1
Setting range I
dsd
= I
n
x … during the switch-on
phase in the forward direction FW
0.6 to 10 (in steps of 0.1)
Default value: 2
0.6 to 10 (in steps of 0.1)
Default value: 10
Setting range I
dsd
= I
n
x … during the switch-on
phase in the backward direction BW
0.6 to 10 (in steps of 0.1)
Default value: 2
0.6 to 10 (in steps of 0.1)
Default value: 10
Settings DST phase di󹪜erence angle 3.6°; 7.2°; 10.8°; 14.5°; 18.2°; 22.0°; 25.9°; 30°; 34.2°; 38.7°;
43.4°; 48.6°; 54.3°; 61.0°; 69.6°
Default value: 3.6°
De󹪝nition of direction of power 󹪞ow Bottom → top; top → bottom
Default value: top → bottom
V-NBA Phase voltage unbalance V-NBA
Protection function can be enabled/disabled ● ●
Setting range U
nba
phase voltage unbalance 2 to 90% (in steps of 1%)
Default value: 50%
2 to 90% (in steps of 1%)
Default value: 50%
Setting range of the delay time t
nba
for phase volt‐
age unbalance
0.50 to 60 s (in steps of 0.5)
Default value: 10 s
0.50 to 60 s (in steps of 0.5)
Default value: 10 s
Enabling/disabling of tripping on phase voltage
unbalance
● ●
Description
2.9Electronic trip unit ETU
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 73