IG-183-EN version 06; 31/03/2020
30
Installation
General instructions
cgm.3 system: medium voltage SF
6
gas-insulated
cubicles up to 38 kV according to IEEE and CSA standards
Circuit breaker function with AV / RAV driving mechanism
D1
Frontal or rear cables incoming or outgoing
D2
Lateral cables incoming or outgoing
Figure 4.9. Dimensions [mm] of the cable trench for cgm.3-v with
AV / RAV driving mechanism
Necessary cable trench for circuit breaker with AV / RAV driving mechanism
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** 41 555 400 400
185 43 590
400 500
240 45.2 640
300 47.5 685
500 600
400 50.5 745
Three-core
18/30 kV
< 150 92.7 805 850 850
* Check with the cable used manufacturer’s data.
** 150 mm
2
cable only valid up to 21 kA.
Table 4.8. Necessary cable trench for circuit breaker with AV / RAV driving mechanism
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