10-22
Wiring Examples
This section provides wiring examples to connect a Braking Unit and other peripheral devices to the main
circuits, examples of wiring a transformer to Inverter I/O, and other aspects of Inverter wiring.
îš‹ Using a Braking Resistor Unit
This example shows wiring for a Braking Resistor Unit.
CIMR-F7A20P4 to -F7A2018 (200 V Class Inverters of 0.4 to 18.5 kW)
CIMR-F7A40P4 to -F7A4018 (400 V Class Inverters of 0.4 to 18.5 kW)
Fig 10.9
3-phase power
200 to 230 V 50/60 Hz
or 380 to 460 V
50/60 Hz
A sequence is required to turn
OFF the power supply for the ther-
mal overload relay trip contacts of
the Braking Resistor Unit.
Short-circuit bar
DC Reactor to
improve input
power factor
(Optional)
Braking Resistor overheating contacts
(Thermal overload relay trip contacts)
Braking Resistor Unit
*3
Inverter
Overload relay trip contact
of Braking Resistor Unit
Fault contacts
Motor
200 V Class Inverters: Ground to
100 Ω max., 400 V Class Inverters:
Ground to 10 Ω max.)
* 1. A transformer is not required for 200 V Class
* 2. Remove the short-circuit bar (normally connected) from + 1 and + 2 when connecting
a DC Reactor (Optional).
* 3. Disable stall prevention during deceleration by setting L3-04 and using a Braking
Resistor Unit. The motor may not stop within the deceleration time if this setting is
not changed.
* 4. When connecting an separately-installed type Braking Resistor Unit (model CDBR)
to Inverters with built-in braking transistor (200 V/400 V 18.5 kW or less), connect
the B1 terminal of the Inverter to the + terminal of the Braking Resistor Unit and con-
nect the − terminal of the Inverter to the − terminal of the Braking Resistor Unit. The
B2 terminal is not used in this case.
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
MC
To Next Page
Loading...
Need help?
General