3-17
3.10 Inverter Wiring
Wiring Precautions
Danger
!
Do
NOT
remove any protective covers or attempt any wiring while input power is
applied. Connect all wiring before applying input power. When making wiring
changes after power up, remove input power and wait a minimum of five minutes
after power has been turned off before starting. Also confirm that the charge lamp
is off and that DC voltage between terminals B1/P or (+) and (-) does not exceed
25V, otherwise
electric shock may result.
Only authorized personnel should work on the equipment. (Take off metal jewelry
such as watches and rings and use insulated tools.), otherwise
electric shock or
injury may result.
(A)
Power input terminals
1.
The Input power supply voltage can be connected in any phase sequence to power input terminals
R/L1, S/L2, or T/L3 on the terminal block.
2.
DO NOT connect the AC input power source to the output terminals U/T1, V/T2 and. W/T3.
3.
Connect the output terminals U/T1, V/T2, W/T3 to motor lead wires U/T1, V/T2, and W/T3,
respectively.
4.
Check that the motor rotates forward with the forward run source. If it does not, swap any 2 of the
output cables to change motor direction.
5.
DO NOT connect phase correcting capacitors or LC/RC noise filter to the output circuit.
Example power connections:
Inverter with dedicated power line
Inverter
IM
Power
MCCB
Install a Supply RFI filter or Isolation transformer when the power source is shared with other high power
electrical equipment as shown below.
Inverter
IM
Machine
RFI
Filter
Power
MCCB
Inverter
IM
Machine
Isolation transformer
Power
MCCB