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Basic Installation 3-31
MN1943
3.7.1.2 Continuation of motor power cable shielding
When using a motor contactor, or extending the motor cable through a terminal box, ensure that
the motor cable shielding is continued all the way to the motor.
Contactor
Terminal
box
Motor
MotiFlex
e
100
Figure 17 - Continuation of motor power cable shielding
3.7.2 Motor circuit contactor
If required by local codes or for safety reasons, an M-Contactor (motor circuit contactor) may be
installed to provide a physical disconnection of the motor windings from the MotiFlex
e
100 (see
Figure 14). Opening the M-Contactor ensures that the MotiFlex
e
100 cannot drive the motor,
which may be necessary during equipment maintenance or similar operations. Under certain
circumstances, it may also be necessary to fit a brake to a rotary motor. This is important with
hanging loads where disconnecting the motor windings could result in the load falling. Contact
your local supplier for details of appropriate brakes. Ensure that shielding of the motor cable is
continued on both sides of the contactor.
If an M-Contactor is installed, the MotiFlex
e
100 must be disabled at least 20 ms
before the M-Contactor is opened. If the M-Contactor is opened while the
MotiFlex
e
100 is supplying power to the motor, the MotiFlex
e
100 could be
damaged. Incorrect installation or failure of the M-Contactor or its wiring could
result in damage to the MotiFlex
e
100.
3.7.3 Sinusoidal filter
A sinusoidal filter is used to provide a better quality waveform to the motor, reducing motor noise,
temperature and mechanical stress. It will reduce or eliminate harmful dV/dt values (voltage rise
over time) and voltage doubling effects which can damage motor insulation. This effect occurs
most noticeably when using very long motor cables, for example 30.5 m (100 ft) or more. Baldor
motors intended to be used with drives are designed to withstand the effects of large dV/dt and
overvoltage effects. However, if very long motor cables are unavoidable and are causing
problems, then a sinusoidal filter may be beneficial.
CAUTION
Summary of Contents for MotiFlex e100
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Page 136: ...www baldormotion com 7 8 Troubleshooting MN1943 ...
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Page 218: ...www baldormotion com Comments MN1943 Thank you for taking the time to help us ...
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