Installation manual

RE Owners Manual
5-8
Copyright

2001 Phone: [phone] RE-4500
Vanner Inc. FAX: [phone] Installation Manual
4282 Reynolds Dr. www.vanner.com Rev 10d
Hilliard Ohio 43026 RE Owners_Manual_Rev10d D99988
INCORPORATED
INCORPORATEDINCORPORATED
INCORPORATED
Charging
When the battery voltage falls below the DC Warning level
(default setting / 22 V
DC
for RE24-4500,
44 V
DC
for the RE48-
4500), power is taken from the grid and used to fully charge
the batteries starting with Bulk charging. The RE-4500 will
charge the batteries at unity power factor using the full VA
rating of the charger.
The RE-4500 is capable of a maximum charging current of
100A
DC
.
There are several types of charging modes used by the RE-
4500 listed below: It should be noted that the numbers for the
below examples are listed for a 24 Volt RE24-4500 with the
numbers for the RE48-4500 in parentheses and
Bold italics
.
•
Bulk
During Bulk charging the system first presents a
constant DC current to the battery while watching for
the Bulk voltage end limit. The defaults are 100 A
DC
and 28.4 V
DC
respectively (
50 A
DC
and 56.8 V
DC
for
the RE48). Next, the system holds the battery at the
Bulk voltage 28.4 V
DC
(
56.8 V
DC
for 48V
DC
) while
watching for the DC current to drop to the Absorption
current of 10 A
DC
(
56.8 V
DC
). Then the system does
Absorption charging.
•
Absorption
Absorption charging is a constant current charging
mode with a time out. The system again begins by
directing a constant DC current into the battery (up to
50 A
DC
(
25 A
DC
)) while watching for the Absorption
voltage limit of 30 V
DC
(
60V
DC
). If either of these
limits are hit (or 15 minutes passes), then the system
switches to Float charging.
•
Float
Float charging is a constant voltage charging mode
with a current limit. The factory setting is 26.4 V
DC
(
56.8 V
DC
). If the Absorption current limit is hit 50
A
DC
(
25 A
DC
), then the system resumes Bulk charging.