SIEMENS
Introduction
General technical data
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Siemens D 86.2 · 2007
1
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Motor protection
In addition to the current-dependent overload protection device
located in the connecting leads, we recommend that you also
monitor the temperature rise in the motor - and consequently the
winding temperature - with the aid of the KTY 84-130 tempera-
ture sensors built into the stator winding as standard.
Winding temperature detection with KTY 84-130 temperature
sensors (standard)
The KTY 84-130 sensor is a semiconductor sensor that changes
its resistance depending on temperature in accordance with a
defined, approximately linear characteristic. Two temperature
sensors are built into the winding overhang as standard,
whereby one sensor is used as a spare. The temperature is eval-
uated in the Siemens converter using the resistance of the tem-
perature sensor. The required temperature for alarm and tripping
can be set on the converter.
Two auxiliary terminals are provided for connection in the termi-
nal box.
Optional winding temperature detection with PTC ther-
mistors (thermistor motor protection)
Protection against thermal overloading of the motor is also pro-
vided by PTC thermistors installed in the winding overhang.
When a limit temperature is reached (rated tripping tempera-
ture), the PTC thermistor undergoes a step change in resistance.
This is evaluated by a tripping unit and can be used to open aux-
iliary circuits.
Two auxiliary terminals are provided in the terminal box for con-
necting three built-in temperature sensors for shutdown.
Optional winding temperature detection with PT100 resis-
tance thermometers
PT100 resistance thermometers can also be installed in the
winding overhang. An additional auxiliary terminal box is re-
quired for connection.
Changes in temperature are transferred to a display device in
the form of changes in resistance. The indicator is not included
in the scope of supply.
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Bearing monitoring
Standard bearing vibration monitoring using SPM shock-
pulse measurement
Measuring nipples for SPM shock-pulse measurement are
screwed into the bearing housing at the drive end and non-drive
end as standard.
Optional bearing temperature detection with PT100 resis-
tance thermometers
As an option, bearing thermometers can be screwed into the
bearing housings at the drive end and non-drive end. The wires
are routed through an additional terminal box.
Changes in temperature are transferred to a display device in
the form of changes in resistance. The indicator is not included
in the scope of supply.
R
k
= 2 mA
D
U
3
2.5
2
1.5
1
0.5
0
50
100
150
200
250
300
°C
0
G_D086_EN_00006