2-28
D Do not Use a Phase Advancing Capacitor or Noise Filter
Never connect a phase advance capacitor or LC/RC Noise Filter to the output circuit.
Doing so will result in damage to the Inverter or cause other parts to burn.
D Do not Use an Electromagnetic Switch of Magnetic Contactor
Do not connect an electromagnetic switch of magnetic contactor to the output circuit.
If a load is connected to the Inverter during running, an inrush current will actuate the
overcurrent protective circuit in the Inverter.
D Installing a Thermal Relay
The Inverter has an electronic thermal protection function to protect the motor from
overheating. If, however, more than one motor is operated with one inverter or a multi-
polar motor is used, always install a thermal relay (THR) between the Inverter and the
motor and set n037 to 2 (no thermal protection).
In this case, program the sequence so that the magnetic contactor on the input side of
the main circuit is turned OFF by the contact of the thermal relay.
D Installing a Noise Filter on the Output Side
ConnectaNoiseFiltertotheoutputsideof theInvertertoreduceradio noiseandinduc-
tion noise.
Power
supply
3G3MV
SYSDRIVE
3G3IV-PFO
Signal line
Induction noise Radio noise
Controller
AM radio
Note Please, check page 2-41 for more detailed explanation.
Induction Noise: Electromagnetic induction generates noiseon the signal line, caus-
ing the controller to malfunction.
Radio Noise: Electromagnetic waves from the Inverter and cables cause the
broadcasting radio receiver to make noise.
Design Chapter 2
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