Surge Performance - Xantrex XW4024-120 Operation Manual

Introduction
Auxiliary output
Transfer relay
AC1 and AC2 relay

Surge Performance

1–4
continually flash the AC LED on their respective information panels. If the
system was in pass-through and AC fails on any unit, all units transfer to invert
simultaneously.
Faults When an XW Inverter/Charger in a multi-unit system has a fault, only
the affected device shuts down, except in the following cases:
• When a master unit has an invert mode fault that causes it to stop inverting, a
system wide fault occurs. Invert mode faults on a slave unit shut down only
the affected slave unit.
• Battery-related faults such as battery over-temperature or over-voltage.
Other modes of operation XW inverter/chargers operate independently when
in grid support mode (including sell mode), load shave, generator support and
charger block modes. This allows units to be configured to perform a multiple of
functions independently and allowing greater flexibility in operating the system.
Each XW Inverter/Charger has one programmable auxiliary output that is able to
run a small 12 V fan or operate an external relay to perform other functions, such
as to remotely start a generator (if the Xanbus-enabled XW-AGS is not used), to
disconnect external non-critical loads, or to turn on a diversion load for battery
voltage regulation.
The built-in transfer relay is rated for 60 amps. When an external AC source is
detected on either of its two AC inputs, the switch transfers loads from the XW
Inverter/Charger to the external power source, and then activates the battery
charger to re-charge the battery bank.
The XW Inverter/Charger design does not allow the AC1 and AC2 inputs to feed
into each other. The relays controlling AC1 and AC2 input can never close
simultaneously. This design prevents generator input from feeding out to the
utility grid.
Unlike many other inverters, the XW Inverter/Charger prevents voltage from
sagging dramatically during surge conditions. The XW Inverter/Charger handles
surges of over twice the inverter's rated output with only a minimal drop in output
voltage.
975-0240-01-01