Preparing for use
4.7 Thermal protection
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
43
Table 4- 2
Minimum dimension "X" for the distance between adjacent modules and the air intake of
the machine
Shaft height
X
mm
63 ... 71
15
80 ... 100
20
112
25
132
30
160
40
180 ... 200
90
225 ... 250
100
280 ... 315
110
355
140
4.7
Thermal protection
Protect explosion-protected machines against overload according to IEC / EN 60079-14,
Section "Rotating electrical machines".
Use a motor circuit breaker, directly monitor the winding temperature or use equipment to
provide the same functionality corresponding to the explosion type of protection.
For pole-changing motors, in addition to the circuit breaker, use temperature sensors in the
windings.
Ex d and Ex t
Line supply
●
Set the protective device (e.g. circuit breaker) to the rated current (see the rating plate).
●
Or protect the machine using the certified temperature monitoring specified on the
supplementary plate .
Converter
●
Always operate explosion-protected machines fed from converters with temperature
sensors that directly monitor the temperature.
Ex e and Ex eb
Line supply
●
Set the protective device (e.g. circuit breaker) to the rated current (see the rating plate),
I
LR
/I
Rated
and the locked rotor time.
●
Or protect the machine using the certified temperature monitoring specified on the
supplementary plate.
