Installation
18
General instructions
cgmcosmos
system
Medium voltage switchgear and control gear, fully insulated in SF
6
gas up to 24 kV with external cable test device
IG-257-EN version 01; 03/02/2016
4.6 Connecting the cubicles
The joining of cubicles must be carried out as indicated
in
Ormazabal's
Spares and Accessories Instructions
document
RA-146
, supplied with the materials kit used for
connecting cubicles.
4.7 Earthing the switchgear and control gear assembly
To connect the earth bus:
1.
Screw the earth connection bar between each two
medium voltage cubicles, on their back, using two M8
x 20 hexagonal screws. Apply a torque of 15 Nm.
Fig. 4.12
Earthing the assembly
Tools:
13-mm spanner, torque wrench with
adapter for 13 mm.
Connect the end earthing bar, marked with the
symbol to the Installation's general earth connection.
Earthing the equipment is an essential
condition for safety.
4.8 Cable connections
The medium voltage incoming and outgoing feeders are
linked to the transformer or other cubicles via cables.
These cables and the corresponding bushings on the
cgmcosmos
system cubicles can be connected with
simple (plug-in) or reinforced (screw-in) connecting points,
either IEC type or IEEE-386 compliant.
Never touch live connectors, not even
screened connectors. Screening does not
constitute a protection against direct contact.
When the installation is in service and a
reserve cubicle is left with voltage in the
upper busbar and without the cables in the
lower bushings, insulating plugs must be
placed in the bushings (EUROMOLD type)
or close the earthing switch and lock that
position with a padlock or lock.
The recommended terminations are described below.
Summary of Contents for cgmcosmos-2lv
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