Description
2.4 Electronic trip unit ETU
Air circuit breaker 3WL10
Manual, 11/2017, L1V30499596002-01
61
Enhanced protection functions - only available with
MF Advanced metering function
ETU650 LSI
ETU660 LSIG
DST
Directed short-circuit protection DST
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●
Protection function can be enabled/disabled
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●
Enabling/disabling of tripping on directed
(directional) short-circuit protection
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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
protection (inverse-time in relation to I²t)
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●
Setting range of delay time t
dsd
FW in forward
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
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 (fixed) possible
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●
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 difference 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°
Definition of direction of power flow
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
voltage 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
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Summary of Contents for SENTRON 3WL10
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Page 8: ...Table of contents Air circuit breaker 3WL10 6 Manual 11 2017 L1V30499596002 01 ...
Page 170: ...Operation 6 3 Troubleshooting Air circuit breaker 3WL10 168 Manual 11 2017 L1V30499596002 01 ...
Page 180: ...Technical specifications Air circuit breaker 3WL10 178 Manual 11 2017 L1V30499596002 01 ...
Page 199: ...Air circuit breaker 3WL10 Manual 11 2017 L1V30499596002 01 197 Circuit diagrams 10 ...
Page 212: ...Circuit diagrams Air circuit breaker 3WL10 210 Manual 11 2017 L1V30499596002 01 ...
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