Ormazabal cgm.3-rc User Manual

IG-183-EN version 06; 31/03/2020
28
Installation General instructions
cgm.3 system: medium voltage SF
6
gas-insulated
cubicles up to 38 kV according to IEEE and CSA standards
4.3.2. Cubicles with IAC internal arc up to 25 kA – 1 s
Feeder, busbar raise and cable raise functions
D1
Frontal or rear cables incoming or outgoing
D2
Lateral cables incoming or outgoing
Figure 4.7. Dimensions [mm] of the cable trench for cgm.3-l, cgm.3-rb
and cgm.3-rc
Necessary cable trench for feeder, busbar raise and cable raise functions
Cable data Minimum depth
Cable
insulation
Cable type
Cable section
[mm
2
]
Cable
diameter
[mm]
Indicative
radius of
curvature*
[mm]
D1
[mm]
D2
[mm]
Dry insulation
One-core
18/30 kV
< 150** 41 555 370 500
185 43 590
370 550
240 45.2 640
300 47.5 685
370 660
400 50.5 745
Three-core
18/30 kV
< 150 92.7 805 650 650
* Check with the cable used manufacturer’s data.
** 150 mm
2
cable only valid up to 21 kA.
Table 4.6. Necessary cable trench for feeder, busbar raise and cable raise functions

Ormazabal cgm.3-rc Specifications

General

Brand	Ormazabal
Model	cgm.3-rc
Category	Power distribution unit
Language	English