Constructional Data Of The Foundation - Siemens NXPLUS C Installation And Operating Instructions Manual

Installation
Construction of the floor
Earthing system
Cable basement
48/172
The floor covering must be even, easy to clean, pressure-resistant, slip-resistant, abrasion-
resistant and electrically discharging.
As floor construction, the following is possible:
Steel girder layer
DANGER!
Risk of injury by falling panel. When shifting, the panel may slip off the frame construction, and
fall over.
Ensure that the used frame construction corresponds to the requirements on construction

and load-bearing capacity. Use longitudinal and cross girders.
When shifting the switchgear, make sure that there is sufficient standing surface for the

panel.
Suitable for large and numerous floor openings, and advantageous for later modifications or
extensions of the switchgear. The frame construction should feature longitudinal and cross
girders to enable later panel replacements without problems. The dimensions result from the
constructional data of NXPLUS C Wind (see page 49, "Constructional data of the foundation").
Reinforced-concrete plate
Suitable for small room dimensions or spans, as well as for few and smaller floor openings.
Double floor
Suitable if neither a cable basement nor sufficient cable ducts can be installed; it consists of
removable, flame-retardant floor plates mounted on a supporting structure. The supporting
floor is about 30 to 80 cm lower depending on the cable routing (bending radius).
• Provide suitable earthing system for the substation building (e.g. foundation earth
electrode, ring earth electrode, earth rod), and prepare the associated connection points
inside the substation building.
• Connect components brought into the substation building - such as metallic constructions,
floor reinforcement, doors, pressure relief systems, cable tracks, etc. - to the substation
earth, and earth them.
• Dimension the cross-sections of the earth electrodes sufficiently (e.g. foundation earth
electrode, ring earth electrode, earth rod).
• Always observe the associated national and international standards and building
regulations.
ATTENTION!
The cable basement must be sufficiently large to perform all work involved and to provide a
clear arrangement of the cables.
The height and depth of the cable basement depends on the bending radii of the cables

used.
The cable basement must have the following characteristics:
• Dry
• Accessible at any time
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9