BENSHAW RSi H2 Series - Dynamic Braking (DB) Resistor Configuration

Parameter Descriptions
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5.8.13 PRT-66 Dynamic Braking (DB) Resistor Configuration
240V, 30 HP and larger inverters
480V, 50 HP and larger inverters
575V, 30 HP and larger inverters
The above require both an external Dynamic Brake Unit (DBU) and Dynamic Brake Resistor
(DBR). Refer to 13.5 Dynamic Braking Resistor Specification on page 376.
240V, 7.5 HP ~ 25 HP
480V, 7.5 HP ~ 40 HP
575V, 7.5 HP ~ 25 HP
For the above, the braking unit (transistor, IGBT) and monitoring/control circuit is integrated inside the
inverter. An external brake resistor (DBR) is required, connected externally to the inverter.
Resistor data is provided for Brake Torque (BT) of 100% and 150% at a working rate of 5% and 10%
(PRT-66, %ED or duty cycle). If PRT-66, %ED is increased to 10%, the rated capacity (W) of the
brake resistor must be doubled. NOTE: When PRT-66, %ED is set to 0 (default), the braking unit
(transistor, IGBT) is disabled.
A digital output can be used to provide a warning when the duty cycle (%ED) has been exceeded. Set
OUT-31~35 or OUT-36 to 31 (DB Warn %ED).
Group
Code
Name
LCD Display
Parameter Setting
Setting range
Unit
PRT
66
Braking resistor
configuration
DB Warn %ED
0
5
Disabled
(575V only)
0, 1–30
%
OUT
31~35
Multi-function
relay 1–5 item
Relay 1–5
25
DB Warn %ED
-
-
36
Multi-function
output 1 item
Q1 Define