Eaton XP-504, Manual, Page: 44 / 98

3. Installation
3.5 Preparing the device for operation
3.5.1.1 Functional earthing Panel PC
CAUTION
SAFELY DIVERTING ELECTRICAL INTERFERENCE CURRENTS
XP-504The must be connected to a central earth point with a con-
ductor that is as short and has as low a resistance as possible.
l
Ground connection characteristics:
Wire cross-sectional area ≧ 6 mm²,
length ≦ 350 mm, wide ≥ 20 mm
The XP-504 needs to be connected to the conductive structure in,
e.g., the control panel using the central earth point. This method of
earthing is mandatory required for proper function.
Grounding concept – instructions for low-impedance component grounding
≧
16.5 mm
(≧
0.
65”
)
≧
6 mm
(≧
0.24”
)
≧ 20 mm
(≧ 0.78”)
≧ 6
mm
(≧
0.2 4”
)
Ø 6.5 mm
(Ø 0.26 ”)
≦ 35
0 mm
(≦
13.77“
)
Figure 13: Functional earthing
l
Contact surfaces must be conductive and resistant to corrosion.
l
Use toothed lock washers to prevent corrosion on contact surfaces.
l
The conductive contact surface must be as large as possible.
l
Do not use ground straps with ring terminals
l
The grounding point must also have a low-impedance ground connection.
Make up a suitable ground strap length ≤ 35 cm, width ≥ 2 cm with eyelet in
advance.
Remove the M6 nut from the set screw at the grounding point.
Slip the ground strap eye onto the set screw.
Tighten the M6 nut with a torque of 1.3 Nm (11.5 lb-in) back on the set screw.
Functional earthing specifications
Cross-section at least 6 mm2
Tabel 7: Earthing specifications
45
XP-504 08/2021 MN048028EN Eaton.com