Operating the at30 – Exide Technologies Section 94.40 User Manual

Page 40

OPERATING THE AT30

2.3.6. Enabling the High DC Voltage shutdown feature

The AT30 has a built-in high dc voltage shutdown feature. In case of any
maladjustment or internal failure that results in a continuous output
voltage that is too high, the AT30 shuts down after 30 seconds to protect
the battery. The digital display shows

E 03, and the summary alarm relay

contact transfers.
The AT30 is shipped with the high dc voltage shutdown feature disabled.

You can adjust the high dc voltage shutdown
(the setting is the same as the high dc voltage
alarm setting). Refer to Section 2.3.4.
The charger must be in normal operation (not
the Edit mode) to enable the high dc voltage
shutdown.
To enable the shutdown feature:

•

Press and hold the

key, then

•

Press the

CHRG MODE

key.

The

HIGH DC VOLTAGE

indicator lights, and

the display flashes

ON. You can toggle the

shutdown feature

OFF and ON by pressing the

CHRG MODE

key repeatedly.

Parallel Operation

If two (or more) AT30
chargers are connected in
parallel, both sense the
output voltage. If one
charger runs away, it will
supply all the output
current; the other has zero
output current. The high dc
voltage shutdown does not
operate in a charger with
zero output current, so that
only the defective charger
(of two or more in parallel)
shuts down. The other
charger continues to supply
the load normally.

If you do not press any key within 4 seconds, the last state indicated (

OFF) is saved internally. Note that you do not use the

EDIT/ENTER

key

for this feature.

If the AT30 shuts down because of a high dc voltage, the meter display
shows error code

E 03. Reset the charger by turning the ac breaker off,

then on again.