Alpha Technologies Cordex 48-1kW 23 4000W - Manual (Page 12)

A RGUS T ECHNOLOGIES C ORDEX 48-1 K W 23" S HELF FOR S YSTEMS UP TO 4000W WITH D ISTRIBUTION
4.5 AC Input Connections
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. Remove the metal cover from the rear of the shelf to expose the
wireway for input terminal blocks.
The wireway is designed for two customer-supplied 1” conduit fittings for AC supply located on the left side of
the shelf and two 3/4” conduit fittings on the rear.
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. Tighten the cable connector to the AC cable (conduit similar).
Replace rear cover if all connections have been completed.
4.6 Calculating Output Wire Size Requirements
Wire size is calculated by first determining the appropriate maximum voltage drop requirement. Using the
formula below calculate the CMA wire size requirement. Determine the size and number of conductors required
to satisfy the CMA requirement.
CMA = (A x LF x K) / AVD, where:
CMA = Cross section of wire in circular MIL area
A = Ultimate drain in amps
LF = Conductor loop feet
K = 11.1 constant factor for commercial (TW type) copper wire
AVD = Allowable voltage drop
Check again that the ampacity rating of the cable meets the requirement for the installation application. Consult
local electrical codes (NEC, CEC, etc.) for guidelines. If required, increase the size of the cable to meet the code.
4.7 DC Output Connections
WARNING
Leave cables or bus bars disconnected at battery and verify output polarity using
a voltmeter. Make battery connections only after all other wiring is completed.
DC output wire shall be UL approved XHHW or RHH/RHW (for Canadian users, RW90 Type). Control and
sense wires shall be UL approved Style 1015 (for Canadian users, TEW type).
DC output cables can be connected through the side of the shelf. Without the distribution option, the side DC
access is made toward the rear of the shelf.
Terminate cables leads with appropriate crimp lugs. Secure the positive and negative to the shelf output post of
the correct polarity; i.e., +Vcable to +Vpost. Ensure the washers are on the bolts in the same order in which they
were shipped from the factory. Tighten the bolts as per Customer Connections drawing at the rear of this manual.
The common output leg of the rectifier system should be connected to ground. This is typically done at the load
common termination point.
Replace rear cover if all connections have been completed.
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