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Table 2-2 Minimum dimension "X" for the distance between adjacent modules
and the air intake of the machine
2.6
Thermal protection
The machine is optionally equipped with PTC thermistors, Pt100, Pt1000 or
bimetallic sensors. Thermal machine protection by directly monitoring the
winding temperature is permissible if this is certified and test data specified
on the rating plate. PTC thermistors for direct temperature monitoring (sole
protection) ensure explosion protection in conjunction with function tested
tripping devices in accordance with local regulations.
• Direct temperature monitoring for line (DOL) operation: You can operate
the machine without a circuit breaker. Evaluate the temperature sensors.
• Direct temperature monitoring for inverter operation: Evaluate the
temperature sensors.
• If you have to perform a continuity test of the temperature sensors, do
not apply a voltage >2.5 V. If no test data is specified on the rating plate,
this means that the winding protection is only intended as an additional
protection.
• For pole-changing machines, use a direct temperature monitoring sensor
as stated on the rating plate, e.g. PTC thermistor, for each speed level in
addition to the separate, mutually interlocked machine protection relays.
2.7
Interlock circuit for anti-condensation heating
If the anti-condensation heating is operated while the machine is running, this
can increase the temperatures inside the machine.
78
Frame size
80 ... 100
112
132
160
180 ... 200
225 ... 250
280 ... 315
355
X mm
20
25
30
40
90
100
110
140
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