Thermal Protection - Siemens SIMOTICS XP 1MB1 series Operating Instructions Manual

Table 4- 2
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
● Or protect the machine using the certified temperature monitoring specified on the
supplementary plate.
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
Minimum dimension "X" for the distance between adjacent modules and the air intake of
the machine
Shaft height
63 ... 71
80 ... 100
112
132
160
180 ... 200
225 ... 250
280 ... 315
355
/I and the locked rotor time.
LR Rated
Preparing for use
4.7 Thermal protection
X
mm
15
20
25
30
40
90
100
110
140
43