18 021-511-B4-002, Rev. B
4.0 Installation, continued
4.5 AC Connection with High Voltage Transformer
The transformer converts high voltage to 240Vac. The transformer is required for powering
the MPS48-7M from high voltage light pole applications. Use the following connection
procedures for installing the transformer kit.
Required Tools and Materials:
• #2 Phillips screwdriver
• #1 fl athead screwdriver (torque drive)
• Diagonal cutters

4.5.1 Installing the Transformer

1. Verify power is OFF at utility. Tag and lock
utility power switch.
2. Cut the plastic ties securing standard AC
input wire kit that connects the AC input
block to the AC input connector on the
power module. Remove the standard wire
kit.
3. Locate the two countersunk holes located
on the battery shelf. Mount the transformer
onto the shelf using the supplied fl athead
screws (2) and Keps nuts (2).
4. Connect the short red wire from the
transformer to the L1 terminal on the AC
input block. Torque to 4.5 in-lbs (.5 N m).
5. Connect the short white wire from the
transformer to the L2 terminal on the AC
input block. Torque to 4.5 in-lbs (.5 N m).
6. Connect the green 3-pin connector from the
transformer to the AC input connector on
the power module.
7. Secure the new wiring with cable ties.
CAUTION!

Never apply high voltage to a unit without using a step-down transformer. Applying high voltage to

the unit without the transformer will damage the unit and void the warranty.

AC Input
Connector
Cable
Tie
Cable
Tie