Charts; Qbl24 Battery Unit Installation (Main Unit) - Northern Telecom Meridian SL-1 Installation Manual

Chart 2-3

QBL24 BATTERY UNIT INSTALLATION (MAIN UNIT)

When adding batteries to a cabinet ensure that the cabinet is connected to a 220 V 20A or 110 V
30A ac power supply. Service is interrupted when adding batteries to an operating cabinet.
Caution: Do not add batteries to a cabinet connected to a 110 V 15A power supply.
Ensure batteries are installed in a well ventilated area.
STEP PROCEDURE
1 If more than one QBL24 battery unit is being connected to this cabinet, refer to Chart
2-4 and connect the expansion QBL24 unit.
Note: The expansion QBL24 unit requires a QCAD301 expansion cable.
2 Set the breaker on the front of the QBL24 unit to OFF.
3 Remove cover from the QBL24 unit by loosening the captive screws on top of the unit.
4 Unpack batteries and place in unit as shown in Fig. 2-8.
Ensure that the date indicated on the battery packs is the same on all packs.
WARNING: 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.
5 With the three black jumper wires supplied with the batteries, connect the four battery
packs in series as shown in Fig. 2-8. Connect the large lug of the black to the large
terminal (+) on the first battery pack. Connect the small lug of the wire to the small
terminal (-) on the second battery pack and so on until all packs are interconnected.
Ensure that connections to battery terminals are secure but do not over-tighten
(maximum torque not to exceed 35 in/lb (3.95 N.m)).
6 Connect the black wire inside the battery unit to the remaining positive (+) battery
terminal and the red wire to the remaining negative (-) battery terminal.
7 If not removed, remove the front and rear covers from the cabinet.
8 Service will be interrupted on operating cabinet when performing this step.
Set the AC BRKR breaker on the faceplate of the -48 V rectifier at the front of the
cabinet to OFF.
Chart Continued
Installation and connections 2-23
Appendix 1 to 553-2601-200