SIEMENS
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Siemens D 83.1 · 2016
2
Motors with Explosion Protection
SIMOTICS XP 1MD5 motor series
General information
■
Technical specifications
(continued)
Protection against ingress of condensation
Condensation drainage holes must not be drilled into
encapsulated explosion-proof motors, otherwise the type of
protection can no longer be ensured. In frame size 250 and
above, the explosion-proof encapsulated motors have separate
chambers at the drive end (DE) and non-drive end (NDE) for
collection of any condensation that may arise. This prevents
possible damage to the winding as a result of condensation in
the winding overhang spaces. In the case of smaller motors
(frame sizes 71 to 225), the risk of adverse effects from
condensation is countered by applying increased humidity
protection to the winding insulation.
In the standard version, the motor can be used in environments
with up to 80 % relative humidity without the need for further
measures. If the motor is ordered with the option "Increased
tropicalization, humidity
80 % (order code
W61
), the hollow
spaces and internal parts can be finished with special paint,
which enables operation at up to 100 % humidity to be achieved
as an option. An anti-condensation heater is not necessary in
most cases. This is known as a "tropical insulation version".
Terminal boxes
The design of the terminal boxes can be seen in the following
figures. The number and size of the main and auxiliary terminals
as well as their characteristic data can be obtained from the
tables below. Terminal boxes in type of protection "Explosion-
proof enclosure" Ex d IIC according to EN 60079-0 and EN
60079-1 can be supplied on request. Separate terminal boxes
for main connections and accessories are available in type of
protection "Explosion-proof enclosures" for auxiliary terminals for
frame sizes 200 to 355 only.
Figure 1
Terminal box for frame sizes 71 to 112
Figure 2
Terminal box for frame sizes 132 to 225
Figure 3
Terminal box for frame sizes 250 to 280
Figure 4
Terminal box for frame sizes 315 to 355
G_D083_XX_00087a
G_D083_XX_00088a
G_D083_XX_00089a
G_D083_XX_00090
© Siemens AG 2016