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BETA Monitoring
Monitoring of Plants and Devices
Product overview
14/3
Siemens ET B1 · 10/2008
14
Devices
Page Field of application
Standards
Used in
Non-residential
buildings
Residential
buildings
Industry
7
LQ2 0 temperature controllers
14/23
For controlling and limiting temperatures.
Three setting ranges from - 30 to
+ 100 °C. For PT 100 measuring
element + 2 to + 400 °C.
EN 60730
✓ ✓ ✓
5
TT3 472 p.f. controllers
14/26
For the monitoring of asynchronous
motors for underload and no-load
operation, e.g. fan monitoring in
the case of V-belt breakage,
filter blockages, pump monitoring in
the event of valve closure or dry runs.
IEC 60255,
IEC 61557
--
--
✓
5
TT3 43 thermistor motor protection
relays
14/28
For the prevention of thermal motor
overloads, e.g. due to high switching
frequency, single-phasing, disabled
cooling or excessive ambient
temperatures.
With detection of wire breaks in the
sensor circuit.
IEC 60255,
DIN VDE 0435
--
--
✓
© Siemens AG 2008