Using Braking Units In Parallel - YASKAWA Varispeed F7 Instruction Manual

Using Braking Units in Parallel

This example shows wiring for using two Braking Units in parallel.
There are connectors for selecting whether each Braking Unit is to be a Master or Slave. Select "Master" for
the first Braking Unit only, and select "Slave" for all other Braking Units (i.e.) from the second Unit onwards.
3-phase power
200 to 220 V 50 Hz
200 to 230 V 60 Hz
-24
10
A sequence is required to turn OFF the
power supply for the thermal overload relay
trip contacts of the Braking Resistor Unit.
MCCB
Overload relay trip contact
of Braking Resistor Unit
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.
Fig 10.11
Thermal
protector
Thermal switch
Inverter
R/L1 U/T1
S/L2 V/T2
T/L3 W/T3
Cooling fan
Ground to 100
Fault contact output
Forward Run Com-
mand (forward run
when ON)
Reverse Run Com-
mand (reverse run
when ON)
Thermal
protector
Braking
Resistor
Braking
Unit
Resistor
Unit
Braking Unit
Thermal switch
Motor
max.