Assembly And Mounting - Alpha Cordex HP CXRF 48-3.0kW Manual

Cordex HP 2.4kW / 3.0kW Modular Switched Mode Rectifier

6.4 Assembly and mounting

6.4.1 Mounting and grounding a rectifier shelf
WARNING!
Ensure that the power is switched off by switching off breakers and removing battery line fuses,
turn off battery breakers before attempting work on the wiring. Use a voltmeter to verify the
absence of a voltage. Clearly mark the correct polarity of the battery leads before starting work
on DC connections.
NOTE
Mount the shelf in a clean and dry environment. Allow at least 4.45cm (1.75") of free space in
front of the unit for unrestricted cooling airflow. Sufficient free space must be provided at the
front and rear of the power system. This is to meet the cooling requirements of the rectifiers and
to allow easy access to the power system components.
The 19 inch and 23 inch shelves have been designed for mid mounting in a standard EIA relay rack. Mounting
brackets accommodate either 1" or 1-3/4" rack spacing.
Options for flush mounting in a 19 inch or 23 inch rack are also available, but require additional mechanical
support at the rear of the unit unless connected to busbars
1. Mount the shelf to the customer-provided rack using at least two #12 – 24 × 1/2" screws in each bracket.
Use Phillips type screws and screwdriver to eliminate the possibility of slippage and scratching of the unit's
exterior.
2. Connect the shelf chassis ground to the rack. The primary option is using the intended chassis ground
location located on the back of the rectifier shelf using a 2-hole lug, 1/4" on 5/8" center. The secondary option
is to use rack the shelf is installed into for grounding through the mounting ears. Ensure to be using thread
forming screws and star washers to sufficiently remove any paint on non-conductive material and establish a
metal to metal contact to ensure a proper electrical bond.
Protective Earth Terminal
2 Places
Chassis Ground
2-Hole Lug 1/4"
NOTE
In a power system, up to five rectifier shelves may be stacked before a gap must be left for
adequate cooling of the rectifiers and shelves.
24
ON 5/8" Centers
Figure 7 — Protective earth terminal and chassis ground
User Guide
0100037-J0 Rev D