User`s manual

Wiring Chapter 2-2

Connecting Input

Power Supply to the

Terminal Block

Input power supply can be connected to any terminal on the terminal block

because the phase sequence of input power supply is irrelevant to the phase

sequence (R/L1, S/L2, and R/L3).

Installing an AC Reactor If the Inverter is connected to a large-capacity power transformer (660 kW or

more) or the phase advance capacitor is switched, an excessive peak current

may flow through the input power circuit, causing the converter unit to break

down.

To prevent this, install an optional AC reactor on the input side of the Inverter.

This also improves the power factor on the power supply side.

Installing a

Surge Absorber

Always use a surge absorber or diode for the inductive loads near the Inverter.

These inductive loadsinclude magnetic contactors, electromagnetic relays,

solenoid valves, solenoid, and magnetic brakes.

Installing a Noise Filter

on the Power Supply Side

The Inverter’s outputs uses high-speed switching, so noise may be

transmitted from the Inverter to the power line and adversely effect other

devices in the vicinity. It is recommended that a Noise Filter be installed at the

Power Supply to minimize noise transmission. Noise will also be reduced from

the power line to the Inverter.

Wiring Example 1

Note Use a Noise Filter designed for the Inverter. A general-purpose Noise Filter

will be less effective and may not reduce noise.

Power

supply

Input Noise Filters

EMC-conforming Input Noise Filter: 3G3JV-PFI_

Noise

Filter

VARISPEED

Programmable

Controller

CIMR-J7AZ

MCCB