Northern Telecom QCA146 Installation And Testing Instructions page 42

C h a r t 3 - 4
Expansion QBL24 battery unit installation
Step P r o c e d u r e
1 Set the breaker on the front of the QBL24 unit to OFF.
2 Remove cover from the QBL24 unit by loosening the captive
screws on top of the unit.
3 Unpack batteries and place in unit as shown in Figure 2-7.
Ensure that the date indicated on the battery packs is the same
on all packs.
Note: The battery cells are capable of delivering high
currents when externally short-circuited. Caution must be used
when working near the open terminals of the batteries to ensure
that the terminals are not inadvertently short-circuited.
4 With the three black jumper wires supplied with the batteries,
connect the four battery packs in series as shown in Figure 2-7.
Connect the large lug of the black to the large terminal (+) on the
first battery pack and so on until all packs are interconnected.
Ensure that connections to the battery terminals are secure but
do not over-tighten
(maximum torque not to exceed 35 in/lb (3.95 N.m)).
5 Connect the black wire inside the battery unit to the remaining
positive (+) battery terminal and the red wire to the remaining
negative terminal.
6 If expansion QBL24 battery unit is being added to a main QBL24
unit previously connected to an operating cabinet, remove the
front covers from the cabinet.
Set the following breakers to OFF:
• the AC BRKR or AC POWER breaker on front of -48 rectifier
• the DCBRKR on front of main QBL24 battery unit
• the CAB INP breaker on the QUX19 unit
2-Mb/s Remote Peripheral Equipment
Installation
Appendix 1 to 553-2741-200
3-35