Yaskawa VS-626 MC5 User Manual

Page 47

Wiring

3.4.5 Wiring the Main Circuits

- 14

Installing a Surge Absorber

Always use a surge absorber or diode for inductive loads near the Inverter. These inductive loads include
magnetic contactors, electromagnetic relays, solenoid valves, solenoids, and magnetic brakes.

Wiring the Power Terminals of Inverters with 18.5 to 75 kW Outputs

For 200 V class Inverters of 18.5 to 75 kW or 400 V class Inverters of 18.5 to 45 kW, connect the r
and

terminals to the R and S terminals respectively. (These are shorted by a short-circuit bar for ship-

ping.)

For 400 V class, 55, 75 kW, connect the r and 400 terminals to the R and S terminals respectively.
(These are shorted by a short-circuit bar for shipping.)

Installing a Noise Filter on Power Supply Side

Install a noise filter to eliminate noise transmitted between the power line and the Inverter.

Wiring Example 1

MCCB

Power
supply

MCCB

Noise
filter

VS-626MC

Other
controllers

Use a special-purpose noise filter for In-
verters.

Fig

3.8

Correct Power supply Noise Filter Installation

Wiring Example 2

General-
purpose
noise filter

MCCB

Power
supply

MCCB

Power
supply

MCCB

VS-626MC

Other
controllers

VS-626MC

Other
controllers

Do not use general-purpose noise filters. No gen-
eral-purpose noise filter can effectively suppress
noise generated from the Inverter.

Fig

3.9

Incorrect Power supply Noise Filter Installation