Siemens SENTRON 3WA1 - Rotary Switch; Voltage Tap Module

Description
2.5 Electronic trip unit ETU600
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
91
2.5.2.4 Rotary switch
The electronic trip unit ETU600 has five rotary switches for parameterizing the basic
protective functions.
When the circuit breaker is delivered, the
factory basic settings for the position "e.SET"
are:
•
I
r
: 0.4 x I
n
•
t
r
: 0.5 s
•
I
sd
: 0.6 x I
n
•
t
sd
: 0.1 s
•
I
i
1.5 x I
n
Nine fixed values can be set mechanically for each rotary switch. The tenth position is
marked with "e.SET". In this position, the parameter can be set using the operating keys
on the display or with the help of the SENTRON powerconfig configuration software via
Bluetooth or communication.
2.5.2.5 Voltage tap module
A voltage tap module VTM is required for measuring the voltage and calculating further
metering values. It is available as an option for 3WA circuit breakers with rated voltage
up to 1000 V and ETU600.
The voltage tap module is available in two versions:
• VTM680 voltage tap module
For 3WA circuit breakers with breaking capacity N, S, M, H, C and maximum rated
voltage 690 V AC
• VTM640 voltage tap module
For 3WA circuit breakers with breaking capacity E and max. rated voltage 1000 V AC
Note
Breaking capacity E and internal voltage tap
For circuit
breakers with breaking capacity E and an internal voltage tap for metering
functions PMF
-I to PMF-III, the rated insulation voltage voltage U
i
and the rated
operational voltage
voltage U
e
are reduced to 1000 V AC.
It is not possible to use this combination
with a line voltage of 1150 V AC.