Wiring Examples
10
-
9
Using a Braking Unit and Three Braking Resistor Units in Parallel
This example shows wiring for using three Braking Resistor Units in parallel.
Fig 10.3
Thermal switch
* 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.
3-phase power
380 to 480 V 50/
60 Hz
A sequence is required to turn OFF the
power supply for the thermal overload relay
trip contacts of the Braking Resistor Unit.
Ground to 10
Ω
max.
Motor
Fault contact output
Thermal
protector
Thermal
protector
Thermal
protector
Braking Unit
Thermal switch
MCCB
Voltage
setting
Inverter
U/T1
V/T2
W/T3
R/L1
S/L2
T/L3
cooling Fan
Forward run command
(forward run when ON
Reverse run command
(reverse run when ON)
Forward Run/Stop
Reverse Run/Stop
Braking Unit
External fault
Overload relay trip contact
of Braking Resistor Unit
Fault contacts
Braking
Resistor
Unit
Braking
Resistor
Unit
Braking
Resistor
Unit
Le
v
el
de
tec
tor