Practical Test: Power Cables
The immunity of the overall system (active components incl. cabling) in 10 Gbps operation was tested under the various installation variants. The cables (data transmission and power cables) were routed, on the one hand, in a mesh cable tray system, on the other, on the ground at a direct distance to each other.
When installed on a mesh cable tray, a distance of 0 cm to 50 cm was maintained between the power and data transmission cables during the tests. The cables were routed in a U-shaped configuration over a length of 30 m. The power cable as the source of interference was exposed to burst pulses during the tests.
The evaluation of the “mesh cable tray” experiment provided the following results:
The screened systems (system 03, 04 and 05) meet the requirements of MICE class E3 at all distances.
System 01 (U/UTP) meets the requirements of MICE class E1 as of a distance of ≥ 30 cm.
Therefore a sufficient distance between power and data transmission cables must be maintained for unscreened systems. This rule can usually be ignored for screened systems.