Cubicles With Iac Internal Arc Up - Ormazabal cgm.3 Series General Instructions Manual

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