22
Keysight M9514A Site Preparation and Installation Guide
Connect the Chassis to the AC Power Line
Mains Disconnect
Mains Disconnect
For both single-phase and 3-Phase AC Line operation, a mains disconnect -
providing over-current and short circuit protection - must be provided. It
disconnects the mains circuits from the mains supply. It may be a switch
disconnect or a circuit breaker. The front panel switch is only a standby switch and
is not a LINE switch (disconnecting device).
-
If a switch disconnect is used, it must:
–
Each phase must be appropriately rated.
–
Open all line conductors and neutral conductors where local code applies,
but do not open the protective earth conductor.
–
Be marked “System Mains Disconnect” or the equivalent in your language.
–
Be marked with a “
|
” for the “On” position or a “
O
” for “Off.”
–
Be capable of being locked in the “Off” position but not in the “On” position.
–
Be installed within three meters of the chassis, where it can be easily
reached by the system operator without requiring the system to be moved
to access the disconnect.
-
If a circuit breaker is used, it must meet all of the switch requirements above
plus:
–
Be rated for a appropriate amps interrupting capability capacity (AIC) if used
on a 200-240 volt circuit .
Convenience outlets should be installed near the system for external equipment
such as computers and monitors, etc. Locate the outlets within
1 meter (three feet) of the rear of the system.
AC wiring and the Mains Disconnect is subject to local and regional
electrical codes. A licensed electrician must determine and install
the appropriate Mains Disconnect.
Copper wire must be used in the power drop. A licensed electrician
must determine the wire size for the power drop according to local
and regional codes. The wires must be sized to ensure that the
voltage at the system does not drop below 90% of the nominal
voltage.
