Nidec Commander C200 Guide page 13

OPENING OF BRANCH CIRCUIT
Opening of the branch-circuit protective device may be an indication that a fault has been interrupted. To reduce the
risk of fire or electric shock, the equipment should be examined and replaced if damaged. If burnout of the current
element of an overload relay occurs, the complete overload relay must be replaced.
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection must
be provided in accordance with the National Electrical Code (NEC), The Canadian Electrical Code, and any
additional local codes.
DYNAMIC BRAKING
Commander C200/C300, frame sizes 1 to 4 have been evaluated for dynamic braking applications. Other drive
models have not been evaluated for dynamic braking.
A.7 Motor overload protection and thermal memory retention
The devices incorporate solid state overload protection for the motor load. The protection levels are expressed as a
percentage of full-load current. Refer to the Control User Guide for further information.
In order for the motor protection to work properly, the motor rated current must be entered into Pr 06 or Pr 05.007.
The protection level may be adjusted below 150 % if required. Refer to the Control User Guide for further
information.
All models are provided with thermal memory retention.
A.8 External Class 2 supply
The external power supply used to power the 24 V control circuit shall be marked: "UL Class 2". The power supply
voltage shall not exceed 24 Vdc.
C200/C300 Step By Step Guide
Issue Number: 1
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