Siemens SENTRON 3VL System Manual page 122
Switching/protection devices, molded-case circuit breakers
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Also See for SENTRON 3VL:
- System manual (318 pages) ,
- Function manual (146 pages) ,
- Operating instructions manual (12 pages)
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Displays and operator controls
9.1 Overcurrent trip unit without LCD display
Thermomagnetic overcurrent trip units TM VL160-VL630
Characteristic
Application
curve
Line protection TM, LI/LIN function
Overload protection adjustable I
I
n
Short-circuit protection adjustable I
10 x I
Electronic trip units ETU VL160-VL1600
The electronic trip units include the following operating features:
● No auxiliary voltage is necessary for the tripping system.
● All ETUs have a thermal memory
● A flashing green LED indicates correct operation of the microprocessor
● Overload status (I > 1.05 x I
● Integral self-test function
● Plug-in socket for tester
● Communication link to PROFIBUS DP and Modbus
Characteristic
Application
curve
ETU10 for line protection, LI/LIN function
Overload protection I
0.95; 1 x I
Short-circuit protection (instantaneous)
I
= 1.25 to 11 x I
i
Neutral conductor protection
I
= 50%/100% x I
n
ETU20 for line and generator protection,
LSI / LSIN function
Overload protection I
0.95; 1 x I
Short-circuit protection (short-time delay)
I
= 1.5 to 10 x I
sd
I
t selectable on/off
2
Short-circuit protection (instantaneous)
I
= 11 x I
i
dependent)
Neutral conductor protection
I
= 50%/100% x I
n
122
for VL160 to VL630
n
= 0.4; 0.45; 0.5 to
R
, time-lag class t
= 2.5 to 30
n
R
(frame-size-dependent)
n
, "TA" and "NA" versions
R
= 0.4; 0.45; 0.5 to
R
n
, t
= 0 to 0.5 s
R
sd
(fixed setting, frame-size-
n
, "TF" and "NF" versions
R
View
•
i
= 0.8 to 1 x
=160A
•
n
R
7
8
6
9
x
•
n
5
10
= 5 to
i
2
) is indicated by a permanently lit yellow LED (alarm)
R
View
I
R
.95
.9
.8
X3
I
x
n
I
R
.95
.9
.8
X3
I
x
n
NSE-00541
16
DC
•
R
1.0
50 C
• •
R
i
~
.8
TM
=
CAT.A
x
•
n
4
6
t
I
(S)
1.0
.4
30
2.5
11
1.25
R
i
.45
25
4
10
1.5
.5
20
6
8
2
.6
17
8
6
3
I
.7 .63
14
10
x
5
4
n
I
t
1.0
.4
10
1.5
(S)
.4
0
sd
sd
.45
8
2
.3
.1
.5
7
2.5
.2
.2
t I
2
.6
.1
.3
6
3
I
.4
ON
.5
.7 .63
x
5
4
OFF
R
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
I
Alarm
N
>1.05
Active
I
I
N
N
100%
50%
I
Alarm
N
>1.05
Active
I
2
t
I
I
N
N
100%
50%
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