Siemens SENTRON 3VL - Page 124

Displays and operator controls
9.1 Overcurrent trip unit without LCD display
3VL molded-case circuit breakers
124 System Manual, 03/2009, 110 0110 - 02 DS 01
Characteristic
curve
Application View
L
I
ETU10M for line and generator protection,
LI function
Finely adjustable overload protection
I
R
= 0.41; 0.42 to 0.98; 0.99; 1 x I
n
,
Trip class t
C
= 10 (fixed setting)
Thermal memory
Short-circuit protection (instantaneous)
I
i
= 1.25 to 11 x I
n
(frame-size-dependent)
with phase failure sensitivity (40% I
R
fixed
setting)
.5
.9
.8
.7
.4
.6
.4
.4
.4
.4
.07
.04
.06
.05
.08
.10
.09
.01
.03
.02
1.5
1.25
Alarm
Active
>1.05
X3
R
I
x
I
n
x
I
n
I
i
6
3
5
4
10
8
2
11
+
/
,
ETU30M for motor and generator protection,
LI function
Finely adjustable overload protection
I
R
= 0.41; 0.42 to 0.98; 0.99; 1 x I
n
,
Trip class t
C
= 10, 20, 30
Thermal memory
Short-circuit protection (instantaneous)
I
i
= 6 to 11 x I
n
with phase failure sensitivity
(40% I
R
fixed setting)
.5
.9
.8
.7
.4
.6
.4
.4
.4
.4
.07
.04
.06
.05
.08
.10
.09
.01
.03
.02
Alarm
Active
>1.05
X3
R
I
x
I
n
+
I
i
I
i
I
n
I
n
I
i
I
n
20
10
=8x
=11x
10
30
20
20
Test
30
10
TC
30
=6x