Siemens NXAIR - Fitting the Earthing Device; Design, Application and Inspection of the Earthing Device Accessories

370 NXAIR / ≤ 40 kA 110-0134.9 / 13
Fitting the earthing device
26 Fitting the earthing device
INFORMATION
Read and understand these instructions before attempting operating works.
26.1 Design, application and inspection of the earthing device accessories
DANGER
Impermissibly high voltage and current
Inappropriate use of the earthing device accessories will result in impermissibly
high voltage and current.
Use the earthing device exclusively for the maximum permissible short-
circuit current and the maximum permissible short-circuit duration.
Do not use the earthing device for short-circuit tests or purposes causing
similarly high voltages and currents.
Perform diligent inspection of the earthing device accessories before
each application.
Panel width 600 mm
Panel width 800 mm
Max. short-circuit current and
max. short-circuit duration
= 25 kA / 1 s
= 25 kA / 1 s
Diameter of the fixed contacts in the bushings
40 mm
60 mm
Rated normal current of feeders
≤ 1000 A
1250 A
Fig. 672: Earthing device and earthing rod
(1)
Coupling of the earthing rod
(2)
Limiting ring
(3)
Hand area
(4)
Cross bar
(5)
Earthing clamp
(6)
Screw handle of the earthing clamp
(7)
Spindle of the earthing tulip
(8)
Earthing tulip