Toshiba TOSVERT VF-A7 Instruction Manual page 122

2) An external braking resistor (optional)
a) External braking resistor (with a thermal fuse) (optional)
MCCB
Power
supply
[Parameter setting]
Title Function
Dynamic braking

mode selection
In the case that the internal dynamic resistor is used in 3.7kW model or less, then do not
use any external braking resistors. When using an external braking resistor instead of
the internal resistor, change the connection of the internal resistor from terminal PB1 to
terminal PR1. (For boosting braking force)
Do not connect an external resistor with a resistance (combined resistance) smaller
than the minimum admissible resistance.
For overload protection, be sure to set the parameters
[Parameter setting]
Title
Dynamic braking resistance

Dynamic braking resistor capacity

[Externally connectable braking resistors (resistance)]
Voltage Applicable motor
class [V] capacity [kW]
0.4, 0.75
1.5
200
2.2
3.7
0.75, 1.5
400 2.2
3.7
Inverter
Adjustment range
: Disabled
: Enabled/overload detection enabled
Function
Internal braking
resistor
120[W] - 70[ ]
120[W] - 40[ ]
120[W] - 150[ ]
F-26
External braking resistor
(optional)
Motor
IM
/
and properly.
 
Adjustment range
  [ ]
  [kW]
Minimum admissible resistance
connected externally [ ]
63
35
25
17
100
67
40
Setting value

Setting value
Any value