SIEMENS
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Siemens MD 50.8 · 2017
Motor options
Mechanical design
Motor connection and terminal boxes
6
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Connection, circuit and terminal boxes
(continued)
Terminal box cast
Motors can be supplied with the bottom half of the terminal box
cast onto the motor housing in order to prevent water ingress into
the housing.
In this case, no further changes can be made to the position of
the terminal box.
External grounding
IEC 60034 specifies additional external grounding for motors
with ratings of 100 kW and higher. This is optionally available for
motors in frame sizes between 63 and 132.
Maximum conductor connection for external grounding
Modular system in combination with motor connection and terminal box for motor sizes 63 to 132
Order code:
Terminal box cast
M53
Order code:
External grounding
N53
Motor frame size
Thread size
63
…
90
M4
100
…
112
M5
132
M6
Modular system
Encoder
system
Brake
Self ventilation
Forced ventilation
Second
shaft
extension
Without manual
release
With manual release
Microswitch
Without locking
mechanism
With locking
mechanism
Air flow
monitoring
1)
Wear
monitoring
Terminal box
✓
✓
✓
✓
✓
On request
✓
✓
Motor plug
✓
✓
✓
✓
-
On request
✓
✓
1)
Can be selected for brake type L32 or higher
© Siemens AG 2017