SIEMENS
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Siemens NC 62 · 2016
SIMOTICS motors
Technical definitions for AC motors
6
■
Overview
(continued)
Motor protection
The KTY84-130 temperature sensor is used to measure the
motor temperature for converter-fed motor operation.
This sensor is a semi-conductor that changes its resistance
depending on temperature in accordance with a defined curve.
Siemens converters calculate the motor temperature from the
resistance of the temperature sensor.
Their parameters can be set for specific alarm and shutdown
temperatures.
The KTY84-130 temperature sensor is embedded in the winding
overhang of the motor like a PTC thermistor.
Starting in 2016, a new PT1000 temperature sensor will be
phased in and will gradually replace the KTY-84 sensor in the
motors. Before the new sensor is released, all the relevant
information will be made available at an appropriate time.
Sensors are evaluated as standard in the SINAMICS S120
drive system.
If the motors are operated on converters that do not feature a
KTY84 evaluation circuit, the temperature can be measured with
the external 3RS1040 temperature monitoring relay.
For further information, please refer to Catalog IC 10 or visit the
Siemens Industry Mall:
/industrymall
Paint finish
Motors without a paint finish have an impregnated resin coating.
Motors with primer have corrosion protection.
All motors can be painted over with commercially available
paints. Up to 2 additional paint coats are permissible.
R
3
2.5
2
1.5
1
0.5
0
50
100
150
200
250
300
°C
0
(122)
(212) (302) (392) (482)
(572)
(°F)
G_D211_EN_00171
kΩ
T
u
I
D
= 2 mA
Version
Suitability of paint finish for climate group
in accordance with IEC 60721, Part 2
–
1
Paint finish
Moderate
(expanded) for indoor and
outdoor installation with roof protection
Briefly
Continuously
Up to 150 °C (302 °F)
Up to 120 °C (248 °F)
Special
paint finish
Worldwide
(expanded) for outdoor installation
Briefly
Continuously
Also
Up to 150 °C (302 °F)
Up to 120 °C (248 °F)
For corrosive atmospheres up to
1 % acid and alkali concentration or
permanent dampness in sheltered
rooms
© Siemens AG 2016