Toshiba VF-PS1 - Page 101

E6581386
E-35
5
All 200V VF-PS1 and 400V VF-PS1 with ratings of up to 220kW have built-in dynamic braking transistors as standard
equipment. If the rating of your inverter falls within this range, connect the resistor, as shown in Figure a) below or
Figure b) on the next page. If your inverter has a power rating of 250kW or more, connect a resistor, as shown in
Figure c).
Connecting an external braking resistor (optional)
a) External braking resistor (with a thermal fuse) (optional)
IM
Motor
R/L1
S/L2
T/L3
Three-phase
main circuit
Power supply
PA/+
PB
MCCB
An external braking resistor
(optional)
Inverter
U/T1
V/T2
W/T3
[Parameter setting]
Title Function Adjustment range Example of setting
 Dynamic braking selection
:Disabled
:Enabled (braking resistance
overload detect)
:Select (braking resistance overload
not detect)

+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  and  properly.
[Parameter setting]
Title Function Adjustment range Example of setting
 Dynamic braking resistance ~ Ω Any value

Allowable continuous braking
resistance
~ kW Any value

Braking resistance overload
time
~ sec.
Set the parameter to
 for type PBR*- or to
any value for other
types.