Ormazabal cgm.3 Series 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 Series Specifications

General

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