Toshiba TOSVERT VF-S9 Instruction Manual page 112

1) Connecting an external braking resistor (optional)
Separate-type optional resistor (with thermal fuse)
6
[Parameter setting]
Title
MCCB PA PB
R/L1
Three-phase
main circuits
S/L2
Power supply
T/L3 W/T3
Inverter
Without control power
MCCB
Three-phase
main circuits
Power supply
Step-down
transformer
Fuse
Power supply
TC
Function
Dynamic braking selection
Braking resistor operation rate
Overvoltage limit operation
Optional dynamic braking resistor capacities are selected for an operation rate of 3%ED.
To connect a dynamic braking resistor, set the overvoltage limit operation parameter
"1" (Disabled).
To use this inverter in applications that create a continuously regenerative status (such as down-
ward movement of a lift, a press or a tension control machine), or in applications that require
slowdown stopping of a machine with a significant load inertial moment, increase the dynamic
braking resistor capacity according to the operation rate required.
To connect an external dynamic braking resistor, select one with a resultant resistance value
greater than the minimum allowable resistance value. Be sure to set the appropriate operation
rate in to ensure overload protection.
To use a braking resistor without a thermal fuse or to use a braking resistor in mode
" " of , connect thermal relays as shown in the diagram above, to make an operation cir-
cuit for stopping operation.
External braking resistor (optional)
PBR
Motor
U/T1
IM
V/T2
Connecting thermal relays
and an external braking
resistor
External braking resistor
(optional)
PBR
TH-R
PA PB
MC
U/T1
R/L1
R/L2
V/T2
R/L3
W/T3
2 : 1
Inverter
F
MC FLB
K
Surge
suppressor
FLC CC
FLA
G
Setting
2
Any value
1
F-28
E6580757
Motor
IM
Forward run/stop
Reverse run/stop
to