Avaya MCC1, Установка и обновления

Страница: 694 / 874

Installing the Stratum 3 Clock
Task List: Install the Stratum 3 clock
694 SI Installation and Upgrades
June 2004
Return to Task List
Connect AC Power to Stratum 3 Clock Cabinet
Return to Task List
The clock cabinet requires a 120 VAC, 15 amp receptacle. The green wire ground provided by the
receptacle is sufficient. The clock cabinet does not require a ground connection back to the single-point
ground.
Check and Connect Commercial AC Power
Return to Task List
1
Before powering up the system, check the AC power using a KS-20599 digital voltmeter (DVM)
(or equivalent).
2
Set the DVM to the 250 volt range.
3
Carefully measure the voltage between the hot and neutral side of the receptacle. The neutral wire
is white, the hot wire is black.
4
Verify the meter reads 106 to 128 VAC. If not, have a qualified electrician correct the problem.
5
Measure the voltage between the neutral and ground side of the receptacle. The ground wire is
green.
6
Verify the meter reads 0 VAC. If not, have a qualified electrician correct the problem.
7
Set all cabinet power modules OFF. Plug the AC power cable into the receptacle.
Return to Task List
Connect DC Power and Ground to Stratum 3
Clock Cabinet
Return to Task List
Provide power for the clock cabinet from the same DC power plant as the DEFINITY ECS.
Ground the clock cabinet to the DC power plant.
Connect Clock Cabinet Grounding
Return to Task List
1
Measure and cut a 6 AWG (#40) (16 mm
2
) wire long enough to reach from the clock cabinet to
the ground discharge bar in the DC power plant.
2
Insert 1 end of the wire into the ground lug on the clock cabinet and tighten the screw.