Using A Braking Unit And Braking Resistor Unit - YASKAWA varispeed G7 CIMR-G7B series Instruction Manual

Using a Braking Unit and Braking Resistor Unit

When using a Braking Unit and Braking Resistor Unit, create a sequence to detect overheating of the braking
resistor and cut off the power supply to the Inverter.
CIMR-G7B2018, -G7B2022 (200 V Class Inverters of 18.5 kW, 22 kW)
A sequence is required to turn
OFF the power supply for the
thermal overload relay trip con-
tacts of the Braking Resistor
Unit.
3-phase power
200 to 230 V 50/60 Hz
Overload relay trip contact
of Braking Resistor Unit
Forward Run/Stop Forward Run/Stop
Reverse Run/Stop
External fault
* 1. Remove the short-circuit bar (normally connected) from
* 2. Disable stall prevention during deceleration by setting L3-04 when using a Braking Resistor Unit. The motor may not stop within the decel-
eration time if this setting is not changed.
Braking Unit
DC Reactor to
(Optional)
improve input
power factor
(Optional)
Short-circuit bar
MCCB
R/L1
S/L2
T/L3
Inverter
Fault contacts
Forward Run Command (forward run when ON)
Reverse Run Command (reverse run when ON)
Braking Unit
+ +
1 and
Fig 10.10
Braking Resistor Unit
(Optional)
Level
detector
Braking Resistor overheating contacts
(Thermal overload relay trip contacts)
Motor
U/T1
V/T2
W/T3
Ground to 100 Ω max.
2 when connecting a DC Reactor (Optional).
Wiring Examples
*2
10
21
10-