Northern Telecom Meridian SL-1 Installation Manual page 52

2-44 Installation and connections
Chart 2-9 Continued
QCAD321 JUNCTION BOX ASSEMBLY INSTALLATION
STEP PROCEDURE
23 Insert the previously removed DISCHARGE fuse in the QBL15 battery distribution
box (Fig. 2-14).
24 Connect the power line cord to the commercial ac power supply.
25 Set breakers to ON in the cabinet in the following order:
a) CAB INP breaker on the QUX19 or QUX21 power distribution unit (whichever is
equipped).
b) CE/PE1 breaker on the QUX19 unit (if equipped).
c) Remaining PE breakers on the power distribution units (QUX20, QUX21).
Note: The numbers assigned to the PE breakers correspond to the shelf positions in the cabinet.
Breakers for unused shelf positions should be set to OFF.
26 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 on the QRF12 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.
27 Reinstall the EMI shield (if previously removed).
28 Insert the discharge fuses in the QBL15 battery distribution box.
29 Set the AC BRKR breaker on the faceplate of the -48 V rectifier in the cabinet to ON.
30 If required, install cabinet covers.
31 Install and secure the front panel on the QBL15 battery distribution unit.
32 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.
Appendix 1 to 553-2601-200