2-28
Figure 2.27 shows location of the configuration slide switches.
Figure 2.27 Location of the Slide Switches
Switching example
SW1
SINK SOURCE
SINK
SOURCE
2.4 Cautions Relating to Harmonic Component, Noise, and Leakage Current
(1) Harmonic component
Input current to an inverter includes harmonic components, which may affect other loads and power factor
correcting capacitors that are connected to the same power source as the inverter. If harmonic components
cause any problems, connect a DC reactor (option) to the inverter. It may also be necessary to connect an AC
reactor serially to the power factor correcting capacitors.
(2) Noise
If noise generated from the inverter affects other devices, or that generated from peripheral equipment causes
the inverter to malfunction, follow the basic measures outlined below.
1) If noise generated from the inverter affects the other devices through power wires or grounding wires:
- Isolate the grounded metal frames of the inverter from those of the other devices.
- Connect a noise filter to the inverter power wires.
- Isolate the power system of the other devices from that of the inverter with an insulated transformer.
2) If induction or radio noise generated from the inverter affects other devices through power wires or
grounding wires:
- Isolate the main circuit wires from the control circuit wires and other device wires.
- Put the main circuit wires through a metal conduit and connect the pipe to the ground near the inverter.
- Install the inverter onto the metal switchboard and connect the whole board to the ground.
- Connect a noise filter to the inverter power wires.
3) When implementing measures against noise generated from peripheral equipment:
- For the control signal wires, use twisted or shielded-twisted wires. When using shielded-twisted wires,
connect the wire sheath shield to the common terminals of the control circuit or ground.
- Connect a surge absorber in parallel with a coil or solenoid of the magnetic contactor.
SW3
OFF
ON
SW5
12
15V
SW1
SINK
SOURCE
SW4
V2
PT
Control circuit terminal block
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