462 / 582
BETA Monitoring
Monitoring of Electrical Values
5
TT3 voltage relays
13/6
Siemens ET B1 · 10/2008
*
You can order this quantity or a multiple thereof.
13
■
Characteristic curves
Contacts
U
e
I
e
U
c
MW DT Order No.
Price
per PU
PG PU PS*/
P. unit
Weight
per PU
approx.
V AC A V AC
Unit(s) Unit(s) kg
Under and overvoltage relays
For the monitoring of 3 phases against N,
with asymmetry, reverse voltage and phase failure
detection, with N-conductor monitoring and adjustable
time delay of 0.1 to 20 s, switching thresholds:
Undervoltage:
0.7 ... 1.1
× U
c
, 4 %
adjustable hysteresis
Overvoltage:
0.9 ... 1.3
× U
c
, 4 %
adjustable hysteresis
2
CO
230 4
230/400 2
B
5
TT3 408
027 1
1
0.110
N-conductor monitors
With asymmetry detection and
N-conductor monitoring
2
CO
230 4
230/400 2
B
5
TT3 410
027 1
1
0.110
Voltage relays for undervoltage monitoring of
medical premises
Single-phase against N with test button,
switching thresholds: 0.9 × U
n
, 2 %
hysteresis
2
NO, 2 NC
230 4
230
4
C
5
TT3 411
027 1
1
0.220
Single, two or three-phase against N,
with asymmetry, reverse voltage and phase failure
detection, with N-conductor monitoring, and one test
button each for the phases, switching thresholds:
0.9
× U
n
, 4 %
hysteresis
1
CO, 1 NO, 1 NC 230 4
230/400 4
C
5
TT3 412
027 1
1
0.230
Timing interval of
5
TT3 400 ... 5TT3 406 undervoltage relays
Timing interval of
5
TT3 410 N-conductor monitors
I2_07033b
A
11-14
11-12
L1, L2, L3
C
N
I2_07516b
PEN conductor
interruption
© Siemens AG 2008