EM330D User Manual
A Special Purpose Inverter for Hoisting
21
Installing a Surge Absorber
Install a surge absorber for inductive loads nearby the inverter. These inductive loads
include electromagnetic contactors, solenoid valves, solenoid coils, or electromagnetic
circuit breakers.
Installing a Noise Filter on Power Supply Side
To filter noise transmitted between power cable and the inverter, and the impact on
power grid caused by the noise produced by the inverter.
A special purpose noise filter is required for the inverter.
Correct vs incorrect noise filter installations as shown in Figure 3-5 and Figure
3-6 respectively.
MCC
B
Special
Purpose
Noise Filter
Other
Control
Devices
EM330D
Inverter
IM
EMC
Figure 3-5 Correct Noise Filter Installation
MCCB
Regular
Noise
Filter
Other
Control
Devices
EM330D
Inverter
IM
MCCB
Regular
Noise
Filter
Other
Control
Devices
EM330D
Inverter
IM
(a)
(b)
Figure 3-6 Incorrect Noise Filter Installation
3.2.5
Wiring the Output Side of Main Circuit
Connecting the Inverter and Motor
Connect inverter output terminals U, V, and W to motor input terminals U, V and W.
Check that the motor forwards with the Forward Command. Switch any 2 of the
inverter output terminals U, V, or W to each other and reconnect if the motor reverses
with the Reverse Command.
Never Connecting Power Supply Cable to Output Terminals
Never connect power supply cable to output terminals. If power is input to the output
terminals, the inverter would be damaged.
