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E6581528
E-38
5
VF-AS1 with ratings of up to 160kW have built-in dynamic braking transistor 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 200kW 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
U/T1
Three-phase
main circuit
Power supply
PA/+
PB
MCCB
An external braking resistor
(optional)
Inverter
V/T2
W/T3
[Parameter setting]
Title Function Adjustment range Example of setting
Dynamic braking selection
:Disabled
:Enabled (braking resistance
overload detect)
:Enabled (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.