Ormazabal cgm.3 system Series - Cubicles with Classification of Internal Arc IAC up to 25 Ka - 1 S

General instructions
Installation
IG-136-EN version 10; 23/06/2016
22
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
4.4.2 Cubicles with classification of internal arc IAC up to 25 kA - 1 s
Feeder function, busbar rise and cable rise
Front and rear
cable input or output
(D1)
Side cable input or
output (D2)
Figure 4.7 Dimensions [mm] of the cable trench for cgm.3-l,
cgm.3-rb and cgm.3-rc
Trench necessary for the feeder, busbar rise and cable rise function
Cable data
Approximate radius
of curvature*
[mm]
Minimum depth
Cable insulation Cable type
Cable section
[mm
2
]
Cable diameter
[mm]
D1 [mm] D2 [mm]
Height 1400 mm(***)
Dry insulation
Single-core 18/30 kV
< 150 (**) 41 555 500 800
185 43 590
550 900
240 45.2 640
300 47.5 685
650 1000
400 48 745
3-core 18/30 kV < 150 92.7 805 950 950
Height 1745 mm
Dry insulation
Single-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 48 745
3-core 18/30 kV < 150 92.7 805 650 650
(*) Check against the data of the manufacturer of the cable used.
(**) 150 mm2 cable only valid up to 21 kA.
(***) Exclusively for cgm.3-l and cgm.3-2lp cubicles.
[11] In each case, bear in mind which cable is to be used in that installation.