Omron SYSDRIVE 3G3RV, User Manual

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2
-22
Installing a Magnetic Contactor
If
the power supply for the main circuit is to be shut off during a sequence, a magnetic contactor can be used.
When
a magnetic contactor is installed on the primary side of the main circuit to forcibly stop the Inverter,
however,
the regenerative braking does not work and the Inverter will coast to a stop.
• The
Inverter can be started and stopped by opening and closing the magnetic contactor on the primary side.
Frequently
opening and closing the magnetic contactor, however, may cause the Inverter to break down.
Start
and stop the Inverter at most once every 30 minutes.
•
When
the Inverter is operated with the Digital Operator, automatic operation cannot be performed after
recovery
from a power interruption.
•
If
the Braking Resistor Unit is used, program the sequence so that the magnetic contactor is turned OFF by
the
contact of the Unit's thermal overload relay.
Connecting Input Power Supply to the Terminal Block
Input
power supply can be connected to any terminal R, S or T on the terminal block; the phase sequence of
input
power supply is irrelevant to the phase sequence.
Installing an AC Reactor
If
the Inverter is connected to a large-capacity power transformer (600 kW or more) or the phase advancing
capacitor
is switched, an excessive peak current may flow through the input power circuit, causing the con-
verter
unit to break down.
To
prevent this, install an optional AC Reactor on the input side of the Inverter or a DC reactor to the DC reac-
tor
connection terminals.
This
also improves the power factor on the power supply side.
Installing a Surge Absorber
Always
use a surge absorber or diode for inductive loads near the Inverter. These inductive loads include mag-
netic
contactors, electromagnetic relays, solenoid valves, solenoids, and magnetic brakes.
Installing a Noise Filter on Power Supply Side
Install
a noise filter to eliminate noise transmitted between the power line and the Inverter.
• Correct
Noise Filter Installation
Fig 2.10 Correct Power supply Noise Filter Installation
IM
MCCB
MCCB
Power
supply
Noise
filter
Inverter
Other
controllers
Use a special-purpose noise filter for Inverters.
Ordinary: 3G3EV-PLNFD
@/
3G3IV-PFN
@
EMC compatible: 3G3RV-PFS
@
3G3RV
Example:
SYSMAC