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148 Resistor braking
Brake circuit commissioning
For Standard Control Program:
•
Switch off the overvoltage control of the drive (parameter 20.05).
•
Frame size R6: Check the setting of parameter 21.09. If stop by coasting is
required, select OFF2 STOP.
For the use of the brake resistor overload protection (parameters 27.02...27.05),
consult an ABB representative.
WARNING! If the drive is equipped with a brake chopper but the chopper is
not enabled by parameter setting, the brake resistor must be disconnected
because the protection against resistor overheating is then not in use.
WARNING! Parameter 95.07 LCU DC REF (V) must be set to the minimum
value (default) with brake resistors. Otherwise energy from the supply
network can flow to the brake resistor causing overheating of the resistor
and damage to the equipment.
For settings of other control programs, see the appropriate firmware manual.
Note: Some brake resistors are coated with oil film for protection. At the start-up,
the coating burns off and produces a little bit of smoke. Ensure proper ventilation at
the start-up.
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