Connecting Power For Dc-Powered Systems - Nortel Meridian 1 Manual

Connecting power for DC-powered systems

Powering up the system and initial loading
9 Set the circuit breaker on the MPDU, or the switch on the module power
supply, to ON in Module 0. After a few seconds, the green LED on the
power supply should light.
Repeat this step for each module in the column, one module at a time. (If
the module is equipped with a ringing generator, set the breakers or
switches for both the power supply and the ringing generator to ON.)
Note: It may take up to 90 seconds for the green LED to light on a
ringing generator. This is normal operation.
10 Repeat steps 5 through 9 for each column.
11 Once the green LED is lit on all module power supplies and ringing
generators, set the main circuit breaker for each column to OFF, wait at
least 30 seconds, then set the breaker back to ON (leave CPU columns
off).
• The breaker should not trip. The blower unit in each column should
be running and the green LED on all module power supplies and
ringing generators should be lit. All red column LEDs should also be
lit.
• Set the main circuit breakers for the CPU columns to ON (in dual
Core systems, set the breakers simultaneously).
At this point, all blower units should be running and the green LED on all
module power supplies and ringing generators should be lit. The red column
LEDs will remain lit until the system reloads
1 Set the main AC circuit breaker to each rectifier to OFF.
2 For each rectifier, test the commercial power source for proper voltage
(see Meridian 1 installation planning (553-3001-120) for voltage
requirements).
3 Remove all distribution fuses, or set all distribution breakers to OFF, on
the DC power source for each column.
4 Set all circuit breakers in the rear of each pedestal to OFF.
5 Set the switch on each module power supply and ringing generator to
OFF.
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System installation procedures