Lucent Technologies 415B Battery Plant for 4ESS
Issue 6 September 1999
System Description 2 - 5
Capacitors
Capacitors are located in the PDF bay to add extra energy
storage either to help maintain the bus voltage or to aid in the
clearing of fuses depending on where a fault condition occurs.
Load Capacitor
Charge Tool
A load capacitor charge tool is located at the top of the PDF bay.
This device is used to precharge capacitive-type loads to prevent
operating a load fuse upon insertion.
Shunts
Six shunts are mounted in each PDF bay to monitor feeders from
the Control and Distribution Bay.
Remote
Peripheral
Monitoring Unit
The Remote Peripheral Monitoring (RPM) Unit, mounted on the
front of each PDF bay, monitors the six shunts in the PDF bay
and sends load-monitoring serial data to the Galaxy Controller.
A manually-switchable ammeter is also used to locally monitor
these shunts.
MOV Assembly
for PDF Frames
A Metal Oxide Varistor (MOV) is mounted from frame ground
to the K1 bus bar of each PDF frame. Mounting is made using
connectors from the return K1 Bus Bar, either at the top for a
Top Feed application or at the bottom for a Bottom Feed (BE)
application. This device prevents transits from becoming a
problem when a fuse clears in the PDF frame. This protection is
required when connected to a 4ESS
system. Installation is
covered by Sheet F3 of the H569-429 only.
Battery Strings
Each battery string consists of 70 flooded cells, floated at 2.17
volts per cell, giving a float voltage of 151.9 volts. The 415B
Battery Plant can accommodate up to three strings of batteries.
Each battery string is fused and contains a pilot fuse for alarming
purposes that sends an open string alarm to the Galaxy
Controller.
Each battery string has a battery disconnect switch. These
switches are located in the Control and Distribution Bay and are
accessible from the front of the bay. They have lock-in and
lock-out capability. They also have auxiliary contacts that will
send a major alarm and an open string alarm to the Galaxy
Controller.