WEG CFW700 User Manual - page 29

24 | CFW700

Installation and Connection

E

ng

lis

h

Table 3.3: Cable distances

Rated Output 

Inverter Current

Cable Length(s)

Minimum Separation

Distance

≤ 24 A

≤ 100 m (330 ft)

> 100 m (330 ft)

≥ 10 cm (3.94 in)

≥ 25 cm (9.84 in)

≥ 28 A

≤ 30 m (100 ft)

> 30 m (100 ft)

≥ 10 cm (3.94 in)

≥ 25 cm (9.84 in)

3.3 INSTALLATION ACCORDING TO THE EUROPEAN DIRECTIVE OF 

ELECTROMAGNETIC COMPATIBILITY

The inverters with C3 option (CFW700...C3...) have internal C3 RFI filter to reduce electromagnetic 

interference. These inverters, when properly installed, meet the requirements of “EMC Directive 

89/336/EEC” with the 93/68/EEC supplement.

The CFW700 inverter series has been designed only for industrial applications. Therefore, the 

emission limits of harmonic currents defined by the standards EN 61000-3-2 and EN 61000-3-2/A 

14 are not applicable.

3.3.1 Conformal Installation

1.  Inverters with built-in C3 RFI filter CFW700...C3...

2.   Frame sizes A to D inverters with built-in C3 RFI filter capacitors grounding screws and frame 

size E with J1 cable in the 

 position (XE1). For more information see 

Figure A.8 on page 

208

.

3.  Shielded output cables (motor cables) and connect the shield at both ends (motor and 

inverter) with a low impedance connection for high frequency. Use PCSx-01 kit supplied with 

frame sizes A, B and C inverters. For frame sizes B and C with degree of protection IP55, 

use the PCSC-03 shield kit. For frame sizes D and E inverters use the clamps supplied with 

the product. Ensure good contact between the cable shield and the clamps. Refer to 

Figure 

3.4 on page 18

 and keep the proper separation from other cables according to 

item 3.2.6 

Cable Distances on page 23

. The maximum motor cable length and conduction and 

radiated emission levels are presented at 

Table B.6 on page 226

. Use an external RFI filter 

at the input of the inverter if necessary to have a lower emission level and/or a longer motor 

cable length. For more information (RFI filter commercial reference, motor cable length and 

emission levels) refer to 

Table B.6 on page 226

. 

4.  Shielded control cables and separate the remaining cables according to 

item 3.2.6 Cable 

Distances on page 23

.

5.  Inverter grounding according to the instructions on 

item 3.2.4 Grounding Connections on 

page 19

.

6.  Grounded power supply.