Alpha Technologies INEX Inverter System - Manual (Page 23)

Argus Technologies Ltd. 014-114-C0 Rev D WC
Printed in Canada. © 2008 Argus Technologies Ltd. ARGUS and INEX are registered trademarks of Argus Technologies Ltd. All Rights Reserved. Page 13 of 43
14. To do system grounding, cover up the backplane with the
rear cover first, and screw the ground wire on the rear cover
with the supplied cross hex-washer type nickel screw as
shown:
NOTE: INEX inverter modules allow maximum 12 units cascaded for expanding power capacity. The input current of
entire inverter system would exceed the current limit of available wires. When the total input current is over the
cable current limit, split DC connection to multiple groups by removing inter-connected BAT+ & BAT- bus bars
between groups, and choose suitable wire size for each group. Input DC feeder breaker configured one per shelf
or optionally input breaker per two shelves maximum.
4.5.1 CASE STUDY – An inverter system with eight INV-4810A inverter modules (8kVA)
The total input current, 151.5A @ 48Vdc, can be halved by removing DC positive (BAT+) and DC negative (BAT-)
bus bars connected between shelves 2 and 3. DC connection is split into two groups (4kVA and 4kVA). After
selecting suitable wire for minimum transmission current of 75.8A, two pairs of battery cable are separately
connected to DC positive and negative studs of both groups as shown: