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Routing the cables
When you route the cables:
•
Install the DC medium voltage and control cables on separate routes.
•
Use separate cable entries for different cable types.
•
Make sure that the cable trays are electrically bonded to each other and to the ground.
•
Make sure that the power cables and the control cables are separated by at least 500 mm
(20 in).
•
If control cables cross the power cables, set them at an angle as close to 90 degrees
as possible.
•
Do not put extra cables through the compact skid without permission.
For more information, see drawing 3AES-PVS980-CS-01-DW02
to do: rework on the image for better clarity. Check with Natalia for source image (if available).
Medium voltage cabling
1
Control and low voltage cabling
2
DC cabling lead through holes
3
Enclosure grounding terminals
4
Earthing
Construct an earthing electrode for the compact skid. Follow local regulations. Connect the
earthing electrode to the terminal located at the base of the compact skid. See drawing
3AES-PVS980-CS-02-DW02. Use joint lubricant to protect the connection point against
corrosion.
Follow the minimum requirements for the earthing electrode:
•
Minimum cross-sectional area = 95 mm
2
. The plates are prepared for 95 mm
2
cables
•
Installation depth = 500...800 mm from the surface of the soil
•
Installation route round the compact skid = one meter from the outer wall
•
Connect the compact skid earthing busbar and the skid frame protective earthing to the
earthing electrode.
For more information, see drawing 3AES-PVS980-CS-02-DW02
42 Electrical installation