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BETA Monitoring
Monitoring of Electrical Values
5
TT3 voltage relays
13/9
Siemens ET B1 · 10/2008
13
*
You can order this quantity or a multiple thereof.
Switching example for
5
TT3 407 short-time relays
Switching example for
5
TT3 407 short-time relays
In the case of sensitive technical sequences, it is often not possible to tell
whether this interrupt has interfered with the process sequence. The switch
disconnects the power supply, which can then be switched back by using
the reset pushbutton.
In simple cases, it may be sufficient that a short-time interrupt is registered
without the need to disconnect the power supply. In this case, the duration is
counted by the pulse counter. The pulse counter can be reset if required.
14 12 24 22
11 21
I2_07597c
L1 L2 L3 N
L1 L2 L3 N
K1
K1
Reset
14 12 24 22
11 21
L1 L2 L3 N
L1 L2 L3 N
1 2 3 4
5
TT3 407
5
KT7 686
I2_07598b
Reset
3
× 230 V AC
Switching example of
5
TT3 410 N-conductor monitors
L1
5
TT3 410
L2 L3
N
K1
L1
L2
L3
N
PE
F1
F2
F3
S1
F4
F5
F6
11
14
K1
I2_07517a
Test and
service
switch
© Siemens AG 2008