010-589-B2 Rev B
Page 8 of 19
5
Wiring and Connections
Cordex 125-4.4kW modular switched mode rectifier.
5.1
Safety Precautions
WARNING
Hazardous AC voltages may be present. Ensure power at the AC service panel is off before
attempting work on the AC connections. Use a voltmeter to verify the absence of voltage. Clearly
mark the correct polarity of the battery leads before commencing work on DC connections.
Refer to the previous (Installation) chapter for additional safety precautions.
5.2
Tools Required
Various tools are essential for product installation. Use this list as a guide:
•
Slot head screwdrivers (blade sizes: 1/4", 1/8", 1/16")
•
Philips head screwdriver, #2 (tip size 3/16")
•
Digital voltmeter equipped with test leads
•
Adjustable 125/220Vdc load (optional)
•
Cutters and wire strippers
•
Crimping tool (optional for large gauge wire)
•
Socket and rachet set (Imperial measure).
5.3
Power System Chassis Ground and DC Ground Reference
WARNING
For safety reasons, ensure the system is properly bonded to the building’s ground grid.
125/220Vdc systems are typically floating; i.e., not connected to earth ground.
Connect the chassis ground to the site ground to ensure correct operation of the system and to prevent drifting
floating analog (especially current) readings.
5.4
AC Feeder Protection/Sizing
To maximize system reliability, each power module should be fed from a dedicated protection feeder breaker
located at the AC distribution panel. The feeder breaker can also act as the disconnect device for the connected
5.5
AC Input Connections
WARNING
Use care when removing or replacing the covers for the AC input connections. Never assume that
an electrical connection or conductor is not energized.
CAUTION: AC input wires should be routed in flexible or rigid conduit as far away as possible
from the DC power wires to minimize EMI disturbances.
Ensure all modules are removed from the shelf.
The wireway is designed for two customer-supplied 1” conduit fittings for AC supply located one on each side of
the shelf.
Remove the metal covers (2 places) from the rear of the shelf to expose the AC input terminal blocks, L1 and L2
for each rectifier. Each terminal pair relates to an individual power module as marked.
Attach the conduit retainers to the wireway hole(s) and route the AC cables through.
Secure the wires to the AC input and chassis ground terminals as required.
This chapter provides cabling details and notes on cable sizing for DC applications with respect to the
IE -
module. Refer to the specifications at the front of this manual for
IE recommendations.
