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Motor overload protection – Rockwell Automation 2094-BMxx-M Kinetix 6200 and Kinetix 6500 IAM and AM Power Modules Installation Instructions User Manual

Page 17

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Kinetix 6200 and Kinetix 6500 IAM and AM Power Modules 17

Rockwell Automation Publication 2094-IN011D-EN-P - August 2013

Motor Overload Protection

This servo drive uses solid-state motor overload protection that operates in accordance with
UL 508C. Motor overload protection is provided by algorithms (thermal memory) that predict
actual motor temperature based on operating conditions as long as control power is continuously
applied. However, when control power is removed, thermal memory is not retained.

In addition to thermal memory protection, this drive provides an input for an external
temperature sensor/thermistor device, embedded in the motor, to support the UL requirement
for motor overload protection.

Some motors supported by this drive do not contain temperature sensors/thermistors; therefore,
motor overload protection against excessive consecutive motor overloads with power cycling is
not supported.

This servo drive meets the following UL 508C requirements for solid-state overload protection.

Refer to your servo drive user manual for the interconnect diagram that illustrates the wiring
between your motor and drive.

Motor Overload Protection Trip Point

Value

Ultimately

100% overload

Within 8 minutes

200% overload

Within 20 seconds

600% overload

ATTENTION: To avoid damage to your motor due to overheating caused by excessive,
successive motor overload trips, follow the wiring diagram provided in the user manual for
your motor and drive combination.