Danfoss VLT FC 302 Operating Instructions Manual page 39

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
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.
Load sharing
Load sharing is a feature on standard frequency converters,
but is not available on the LHD unit.
MG37A202
Operating Instructions
Danfoss A/S © Rev. 2014-07-29 All rights reserved.
3 3
37