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BETA Monitoring
Monitoring of Electrical Values
Product overview
13/2
Siemens ET B1 · 10/2008
13
■
Overview
Devices
Page Field of application
Standards
Used in
Non-resid.
buildings
Residential
buildings
Industry
5
TT3 voltage relays
13/3
Monitoring the voltage of emergency
lighting in public buildings, short-time
failures of 20 ms, for ensuring
operational parameters for devices or
system components or monitoring the
neutral conductor for breaks.
IEC 60255;
DIN VDE 0435-303;
DIN VDE 0108;
DIN VDE 0435;
DIN VDE 0633
✓
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✓
5
TT6 current relays
13/11
Monitoring of emergency and signal
lighting and motors.
All current relays can be short-time
overloaded and connected either with
direct measurement or through
transformers.
IEC 60255;
DIN VDE 0435-303
✓
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✓
5
TT6 priority switches
13/17
For reduction of the connection fee in
accordance with German Federal
Regulations on Tariffs when used in
systems with electric storage heaters
where the continuous-flow heaters are
switched with priority.
IEC 60669 (VDE 0632);
BTO § 6 Section 4
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✓
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5
TT3 fuse monitors
13/18
Monitoring of all types of low-voltage
fuses.
Can be used in asymmetric systems
afflicted with harmonics and
regenerative feedback motors.
IEC 60255;
DIN VDE 0435
✓
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✓
5
TT3 phase and phase sequence
monitors
13/20
For the visual signaling of phase failures
or phase sequences in three-phase
systems.
The phase sequence is arbitrary. The
device is also suitable for 1, 2 or
3-
phase operation.
IEC 60255;
DIN VDE 0435
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✓
5
TT3 insulation monitors for
industrial applications
13/22
We recommend the use of insulation
monitors in all systems without
grounding.
Adjustable alarm value 2 to 100 k and
electrical isolation of measuring circuit,
power supply and contact voltage.
IEC 60255;
IEC 61557
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--
✓
7
LQ3 insulation monitors for medical
premises
13/25
For the insulation monitoring of
IT systems or load current monitoring of
IT system transformers for inadmissible
overheating.
The response value is 50 to 500 k and
is adjustable.
EN 61557-8;
IEC 61557-8;
DIN VDE 0100-710;
IEC 60364-7-710
✓
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© Siemens AG 2008