In applications where the motor is used as a brake, energy is generated in the motor and send back into the frequency converter. If the energy can not

be transported back to the motor it will increase the voltage in the converter DC-line. In applications with frequent braking and/or high inertia loads this

increase may lead to an over voltage trip in the converter and finally a shut down. Brake resistors are used to dissipate the excess energy resulting from

the regenerative braking. The resistor is selected in respect to its ohmic value, its power dissipation rate and its physical size. Danfoss offers a wide variety

of different resistors that are specially designed to our frequency converters. See the section

How to order

resistors. Code numbers can be found in the section

MG.20.X1.22 - VLT

Remote Site Products - 1-888-532-2706 - www.remotesiteproducts.com

http://www.remotesiteproducts.com/p-20783-Danfoss-131X8145-VLT-Automation-VT-Drive-VFD-FC322-460V-.5-HP.aspx

3 VLT Automation VT Drive Selection

Control with brake function

for the dimensioning of brake

is a registered Danfoss trademark

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