Siemens NXAIR - Page 372

Fitting the earthing device
372 NXAIR / ≤ 40 kA 110-0134.9 / 14
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.
Preconditions
• Withdrawable part / switching-device truck taken out of the panel
• Low-voltage connector stowed away
• Both shutter to the connection compartment and shutter to the busbar compartment closed
• Bushing contacts to be earthed isolated
• Earthing device accessories available and in perfect condition
• All panel versions except for contactor panels with 435 mm width:
Slip-on lever for opening the shutter available
• Padlock for shutter not to be used available
• Personal protective equipment put on
(1)
Upper shutter covering
bushing contacts linked
with busbar compartment
(2)
Lower shutter covering
bushing contacts linked with
connection compartment
Fig. 675: Panel prepared
Fig. 676: Fixed earthing point for
connecting the
earthing clamp
1
2