10
K
KK
K Using a Braking Unit and Three Braking Resistor Units in Parallel
This
example
shows
wiring
for
using
three
Braking
Resistor
Units
in
parallel.
Fig 10.5
Thermal
protector
Thermal
protector
Thermal
protector
Braking
Resistor
Unit
Braking
Resistor
Unit
Braking
Resistor
Unit
Braking Unit
Thermal switch
Inverter
Motor
Cooling fan
MCCB
3-phase power
380 to 480 V
50/60 Hz
Overload relay trip contact
of Braking Resistor Unit
Voltage
setting
Ground to 10 max.
Fault contact output
Forward run com-
mand (forward run
when ON)
Reverse run com-
mand (reverse run
when ON)
Fault contacts
Forward Run/Stop
Reverse Run/Stop
Braking Unit
External fault
* Disable stall prevention during deceleration by setting L3-04 to Resistor Unit. The motor may
not stop within the deceleration time if this setting is not changed.
Level
detector
A sequence is required to turn OFF the
power supply for the thermal overload relay
trip contacts of the Braking Resistor Unit.
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
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