IG-284-EN version 03; 06/05/2020
17
General Instructions
cgm
.800: Medium-voltage switchgear with integrated insulation in SF
6
gas
up to 36 kV in accordance with IEC Standard with rated current up to 800 A
Installation
4.4. Recommended cable connection trenches
[6]
In each case, bear in mind which cable is to be used in the particular installation.
[7]
Tests carried out with a test current of 21 kA.
Minimum recommended dimensions based on the trench
dimensions used in the tests in accordance with Standard
IEC 62271-200. These dimensions may vary in accordance
with the radius of curvature of the cables used.
[6]
4.4.1. Cubicles with internal arc in tank up to 20 kA
[7]
- 0.5 s
Feeder and cable rise function
The dimensions of the trench depend on the minimum
radius of curvature of the cables used.
Front and rear cable input or output (D1)
Side cable input or output (D2)
Figure 4.4.
Dimensions [mm] of the cable trench for
cgm
.800-l
and
cgm
.800-rc
Trench necessary for the feeder 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]
Dry insulation
Single-phase
< 150
41
555
200
500
185
43
590
200
550
240
45.2
640
300
47.5
685
300
660
400
48
745
500
54.5
820
350
750
Three-phase
< 150
92.7
805
650
650
* Check against the data of the manufacturer of the cable used.
Table 4.2.
Trench necessary for the feeder and cable rise function
Summary of Contents for velatia cgm.800
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