IG-183-EN version 06; 31/03/2020
27
General instructions
cgm.3 system: medium voltage SF
6
gas-insulated
cubicles up to 38 kV according to IEEE and CSA standards
Installation
Metering function
Figure 4.6. Dimensions [mm] of the cable trench for cgm.3-m
Trench necessary for the metering function
Cable insulation Cable type
Cable section
[mm
2
]
Cable diameter
[mm]
Approximate
radius of
curvature*
[mm]
Minimum
depth
D2
Dry insulation
One-core 18/30 kV
< 150 41 555 600
185 43 590 650
240 45.2 640 700
300 47.5 685 750
400 46 745 800
< 150 92.7 805 850
* Check against the data of the manufacturer of the cable used.
Table 4.5. Trench necessary for the metering function
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