Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 52

Electrical Installation
30 A, fuse-protected terminals
•
3-phase power matching incoming mains voltage
for powering auxiliary customer equipment.
•
Not available if 2 manual motor starters are
selected.
•
Terminals are off when the incoming power to
4 4
the frequency converter is off.
•
Power for the fused protected terminals is
provided from the load side of any supplied
contactor, circuit breaker, or disconnect switch.
In applications where the motor is used as a brake, energy
is generated in the motor and sent back into the
frequency converter. If the energy cannot be transported
back to the motor, it increases the voltage in the frequency
converter DC line. In applications with frequent braking
and/or high inertia loads, this increase may lead to an
overvoltage trip in the frequency converter and finally a
shut down. Brake resistors are used to dissipate the excess
energy resulting from the regenerative braking. The resistor
is selected based on its ohmic value, its power dissipation
rate and its physical size. Danfoss offers a wide variety of
different resistors that are specifically designed for Danfoss
frequency converters.
50
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VLT HVAC Drive FC 102 Low Harmonic Drive
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