Lucent Technologies 415B Battery Plant for 4ESS
Issue 6 September 1999
Connecting Telecommunication Loads to the Power Distribution Frame 6 - 1
6
Connecting
Telecommunication Loads to
the Power Distribution Frame
Capacitor
Charging from
the Power
Distribution
Frame
Note: This procedure is used when connecting the actual
telecommunication load to the plant.
Included as part of the Power Distribution Frame is a Capacitor
Charge Tool that is used to precharge a capacitive load before
installing the load fuse. The capacitor charge tool is mounted at
the top of the Power Distribution Frame and is protected with a
2-ampere 70-type fuse.
The probe is attached to the end of a 7-foot retractable cable.
When in use the probe is inserted into the alarm fuse location of
the load circuit being charged. A Charge button is then depressed
and a red LED (labeled CAP CHG/TEST) lights, indicating the
circuit is being charged. When fully charged, the LED
extinguishes, indicating that the circuit is ready for the load fuse
to be installed. This prevents the operation of the fuse at the time
of insertion due to the capacitive charging of the load. The LED
is typically on for less than one second.
A second yellow LED (labeled LOAD FAULT) is also on the
front panel. It is used to indicate to the operator that a load fault
condition exists and should be investigated. Charging should
normally take a very short time; this LED will also light if the
CHARGE pushbutton is held operated for more than 5 seconds.
For safety reasons, voltage appears only at the tip of the probe
while the CHARGE pushbutton switch is operated. Never
touch the tip of the charge probe.
