Nortel Networks 1000M - Manual (Page 142)

142 Installing the power supplies for the Cabinet system
d. Reset the circuit breaker once the ground connection is verified.
—End—
DC power supply installation
Table 21
DC power requirements
Minimum
(see note) Nominal Maximum
Recommended -42.5 V DC -52 V DC -54 V DC
Limits -42.5 V DC -52 V DC -57 V DC
Noise (CMESS) — — 25 dBrnc
Current — — 12 Amps
AC Ripple — — 100 mv RMS
Note: The NTDK72 DC breaker will trip at -42.5 +/- 1.0 V DC.
Refer to the requirements for the DC-powered version in the chapters
on system and site requirements in Communication Server 1000M and
Meridian 1 Small System Planning and Engineering (NN43011-220) for
detailed information about DC power requirements.
Procedure 15
Installing the DC power supply
Step Action
1 Make sure the switches on the power supply are properly set. Refer
to
Figure 60 "NTDK70 and NTDK72 power supply switch settings"
(page 139) of this chapter.
2 Insert the power supply into the first slot on the left of the card shelf
(refer to
Figure 59 "Power supply location, main and expansion
cabinets" (page 138) ).
WARNING
Make sure the circuit breaker on the faceplate of the
power supply is OFF before continuing.
3 Lock the power supply into place with the card tabs.
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Small System Installation and Commissioning
NN43011-310 01.04 Standard
Release 5.0 13 May 2008
Copyright © 2008, Nortel Networks
.