BENSHAW RSi S4 Series, User Manual

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7 - PARAMETER DESCRIPTION
DB Config FUN 05
FUN: DB Config
05 DB Internal
LCD Display
Description Dynamic Braking configuration. The drive provides an internal dynamic brake resistor (DBR) to assist in
stopping. If desired, an External Braking Resistor or Bus Control System may be connected to the B-/B+
DB/DB1 terminals on the power board.
z
NOTE: If an external DB resistor is used, it must be protected with a thermal monitor. The trip output
must be interlocked with the VFD external fault input.
See also Dynamic Braking on page 39.
Parameter Value Description
No Dyn Brk
The DB circuit is disabled.
DB Internal (Default) The VFD is set to use and protect the internal dynamic brake resistor.
DB External
An external resistor is used for additional braking capacity. The VFD will not attempt to protect this
resistor.
Int-ARCTIC
Dynamic braking becomes active if the drive temperature drops below -7 degrees C. ARCTIC Mode
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warning flashes on the keypad when the DB becomes active. The drive will be disabled and not
allowed to run if the drive drops below -10 degrees C. The keypad will indicate a “Not Enabled”
state at this point. The drive must meet the following criteria before operating again.
Drive temperature must be above -9 degrees C, and
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Drive temperature must stay above -9 degrees
C until a time period has elapsed. The time period is dependent on how far below -10 degrees C the
drive was. Each degree below -10 degrees C adds another 4 minutes before restart.
The VFD can operate down to -15 degrees C with no wind loading in Artic Mode
•
Range