Siemens NXAIR - Page 155

Electrical connections
110-0084.9 / 15 NXAIR / ≤ 40 kA 155
For panels with removable voltage transformers
NOTICE
Damage to the switchgear panels
Danger of flashovers if the connecting cables from the insulating bushings for the
removable voltage transformers are laid too close to the earthing conductors of the
cable shield.
Keep the minimum distances of the connecting cables between the cable
connections to the insulating bushings for the removable voltage
transformers and the earthing conductors of the cable shield:
• For U
r
≤ 12 kV: Minimum distance 100 mm
• For U
r
= 17.5 kV: Minimum distance 160 mm
Fig. 222: Connection compartment on panel with
removable voltage transformers:
U
r
≤ 12 kV
Fig. 223: Connection compartment on panel with
removable voltage transformers:
U
r
= 17.5 kV
(3)
Distance ≥ 100 mm
(4)
Distance ≥ 160 mm
(5)
Connecting cables from the insulating bushings for
the removable voltage transformers