Installation Instructions

T ask 16: Connecting 220 V AC P ower Chapter 2: UBS Macro B T S Installation Procedure
Procedure
P erform T ask 16 as given in Procedure 2 -10 .
• Do not wear a wrist str ap while servicing the power supplies or power distribution
cabling.
• Ensure that the source for the AC power is in the OFF position.
• Ensure that all of the PDU circuit break ers are OFF .
Procedure 2 -10 Procedure for T ask 16
1
Set the source for the AC voltage to the OFF position.
2
Ensure that the BTS ground cable (DD) is connected between the rack and
the Master Ground Bar (refer to T ask 3).
3
On the rear of the PSM shelf , locate the AC input terminal block cover box.
Using a TORX T20 bit and driver , remove the 4 screws securing the cover
box to the PSM shelf (refer to Figure 2-24 ).
4
Remove the cover box from the PSM shelf to expose the AC input terminal
block.
5
A ttach conduit to the cover box.
6
Route the AC wires and the earth ground wire through the conduit and the
cover box. Leave wires extending to reach the AC input terminal block.
7
Strip 25 mm of insulation from each of the AC supply line wires and the
earth ground wire.
8
Locate the ground terminal on the AC input terminal block (refer to
Figure 2-23 ).
9
Using a flat blade screwdriver , turn the ground terminal screw counter
clockwise (CCW) until the terminal is fully open. Insert the earth ground
wire into the ground terminal. Turn the ground terminal screw clockwise
(CW) to close the terminal and secure the wire. Tighten the terminal screw
to 4.0 - 4.5 N-m (35 - 40 in-lb).
10
Determine if the AC input terminal block already has insertion bridges
properly installed for the desired AC supply configuration:
• Single-Phase
• 3-Phase ST AR
• 3-Phase DEL T A
Refer to Figure 2-24 as needed.
Continued
2 -68 68P09283A62 -3
PRELIMINARY A UG 2007