Forced Load Sharing; Introduction; System Requirements; Forced Load Sharing Configuration - HindlePower ATevo Series Operating/Service Instructions Manual

13 Forced Load Sharing

13.1 Introduction

Multiple battery chargers are sometimes employed in dc power
systems to provide redundancy. Two (2) or more chargers of the
same voltage rating can be connected in parallel, each of them
capable of powering the connected dc load(s) and charging the
battery. When two (2) or more chargers operate in parallel, they
normally will not share the load current equally. Since any two (2)
chargers will usually have slightly different connection paths, one of
the chargers in a system will typically have a slightly higher dc output
voltage, and will therefore assume more of the burden of providing
the necessary load current.
The ATevo forced load sharing feature supports a single 'Primary'
charger, and up to three (3) 'Secondary' chargers. The Primary
charger communicates with Secondary chargers over a serial
connection. Each charger requires a Serial Communications Adapter
(A13) set for RS-485, wired to all other chargers, to create the forced
load sharing communication network.

13.2 System Requirements

• All battery chargers must be ATevo Series. The ATevo forced load
sharing feature will not operate with legacy AT10.1 and AT30
Series battery chargers.
• All connected chargers must have the same voltage settings,
have the same dc output current rating, and have the same
version of ATevo Main Control Board (A1) firmware.
• Each ATevo requires a 'FLS' Serial Communications Adapter
(A13) to be installed in either Port 2 or Port 3 of the Main Control
Board (A1).

13.3 Forced Load Sharing Configuration

If the ATevo is ordered with the forced load sharing feature, the
hardware and software configuration will be completed at the
factory. The forced load sharing Serial Communications Adapters
(A13) and software will be verified during production test. The
signal interconnection cable will be supplied in a bagged kit, to be
connected to the ATevos in the field after installation.
If forced load sharing is added to the ATevo in the field, the following
three (3) hardware and software configurations will be required.
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ATevo