You will need the following components:
1-VFD inverters
2-Selector switch
3-8-pin 220V AC relay
4-Control Wiring Cables
5-Power Wiring Cables
1-
VFD Power Wiring Connection
1- Connect the L1, L2, and L3 terminals of the
power supply to the L1, L2, and L3 terminals of the VFD inverter. Make sure to
use appropriate wire sizes and connectors for the voltage and current rating of
your system.
2- Connect the ground wire from the power
supply to the ground terminal of the VFD inverter.
2-
VFD Control Wiring Connection
1- Connect the control wiring from the
selector switch to the control terminals of the VFD inverter. The control
terminals are usually labeled as "Start/Stop" or "Run/Stop".
The selector switch should have two positions, one for "Start" and
one for "Stop". Connect one terminal of the selector switch to the
"Start/Run" terminal of the VFD inverter and the other terminal to
the "Stop" terminal.
2-Connect the control wiring from the 8-pin
220V AC relay to the control terminals of the VFD inverter. The relay should
have a coil and multiple contacts. Connect one terminal of the coil to the
"Start/Run" terminal of the VFD inverter and the other terminal to
the common terminal of the relay. Connect the NO (Normally Open) contact of the
relay to the "Stop" terminal of the VFD inverter.
3-
8 Pin Relay Connection
Connect the power supply wires to the coil
terminals of the relay. The coil terminals are usually labeled as
"A1" and "A2". Connect one wire from the power supply to
terminal "A1" and the other wire to terminal "A2".
4-
VFD Interlocking Wiring
1-Connect the control wiring cables to the
control terminals of both VFD inverters. These terminals are usually labeled as
"Start/Stop" or "Run/Stop." Refer to the VFD inverters'
user manual for the specific terminal designations.
2-Connect one side of the selector switch to the
control terminal of the first VFD inverter. This will be the "Start"
position of the selector switch.
3-Connect the other side of the selector
switch to the control terminal of the second VFD inverter. This will be the
"Stop" position of the selector switch.
4-Connect one side of the 8-pin 220V AC relay
coil to the control terminal of the first VFD inverter. This will be the
"Start" position of the relay.
5-Connect the other side of the 8-pin 220V AC
relay coil to the control terminal of the second VFD inverter. This will be the
"Stop" position of the relay.
6-Connect the normally open (NO) contacts of
the 8-pin 220V AC relay to the control terminals of both VFD inverters. These
contacts will close when the relay coil is energized.
