Cable Distances; Installation According To The European Directive Of Electromagnetic Compatibility - WEG CFW700 Manual Del Usuario

Follow instructions below for the proper installation of the control wiring:
1) Wire gauge: 0.5 mm² (20 AWG) to 1.5 mm² (14 AWG).
2) Maximum tightening torque: 0.50 N.m (4.50 lbf.in).
3) Use shielded cables for the connections in XC1 and run the cables separated from the
remaining circuits (power, 110 V / 220 Vac control, etc.), according to
Distances. If control wiring must cross other cables (power cables for instance), make it
cross perpendicular to the wiring and provide a minimum separation of 5 cm (1.9 in) at the
crossing point.
Refer to item 3.2.6 - Cable
Inverter
side
(a) Cable shield connection
4) Relays, contactors, solenoids or coils of electromechanical brakes installed close to the
inverter may eventually create interferences in the control circuitry. To eliminate this effect,
RC suppressors (with AC power supply) or free-wheel diodes (with DC power supply) shall
be connected in parallel to the coils of these devices.

3.2.6 Cable Distances

The power cables and control cables must be separated (relay output cables and other control
cables) according to table 3.3.
Rated output
inverter current
≤ 24 A
≥ 28 A
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.
Distances, for the proper cable distances.
Isolate with tape
Do not ground
Figure 3.7 (a) and (b): Shield connection
Table 3.3: Cable distances
Cable length(s)
≤ 100 m (330 ft)
> 100 m (330 ft)
≤ 30 m (100 ft)
> 30 m (100 ft)
Installation and Connection
item 3.2.6 - Cable
(b) Connection sample of the shield to
ground
Minimum separation
distance
≥ 10 cm (3.94 in)
≥ 25 cm (9.84 in)
≥ 10 cm (3.94 in)
≥ 25 cm (9.84 in)
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