Northern Telecom QCA146 Installation And Testing Instructions page 68

Chart 3-9 (continued)
QCAD321 junction box assembly installation
Step P r o c e d u r e
25 Connect the positive test probe of a volt meter to a ground
source and test the following terminals:
a) Terminal 1 of terminal block TB3 at rear of rectifier. The meter
should indicate a minimum reading of 52.08 V.
b) Negative input (CHARGE) terminal in the QBL15 battery
distribution box. The meter should indicate a minimum reading
of 52.08 V.
Any voltage variations from the batteries should be
investigated.
26 Insert the discharge fuses in the QBL15 battery distribution box.
27 Set the AC BRKR or AC POWER breaker on the faceplate of the
-48 V rectifier in the cabinet to ON.
28 If required, install cabinet covers.
29 Install and secure the front panel on the QBL15 battery
distribution unit.
30 Ensure that the EQUALIZE switch on the front of the QBL15
battery distribution box is set to OFF for normal operation.
Note: When the equalize switch is set to ON, the RECT LED
on the QUAA3 unit in the cabinet extinguishes giving an alarm
indication.
2-Mb/s Remote Peripheral Equipment
Installation
Appendix 1 to 553-2741-200
3-63