Exide Technologies Section 94.30 - Manual (Page 14)

INSTALLING THE AT10.1
10
1.6. CHANGING THE TRANSFORMER TAPS
IMPORTANT: AT10.1 Group II battery chargers (rated 30-100 Adc)
are designed for a single ac input supply voltage. Note the ac
voltage listing on the data nameplate, and tag attached to the ac
circuit breaker.
If your particular site ac supply voltage does not match your AT10.1
ac input requirements, you MUST change the ac input circuit
breaker (and/or fuses), and input surge suppressors. In addition,
you must replace or rewire the transformer as described below.
Failure to use properly rated components may damage the AT10.1.
NOTE: If your AT10.1 battery charger was supplied with 480Vac-60Hz
input, or 220Vac-50/60Hz input, the transformer will only accept the
listed voltage. Do not attempt to rewire these transformers. If a
different ac input voltage is desired for the AT10.1, please contact your
sales representative for ordering replacement parts.
Before you wire ac power to the AT10.1, check the wiring of the main
transformer (T1), to be sure it is connected for the desired ac input
voltage. The main transformer was wired at the factory for the input
voltage specified and listed on the data nameplate.
If your AT10.1 was supplied with 120, 208 or 240Vac - 60Hz input, and
you need to change the factory-wired input voltage, you do so by
changing jumpers on T1. If you are changing from 120Vac to
208/240Vac, or the reverse, you also need to change the input surge
suppressors and the input circuit breaker (and/or ac input fuses). See
Section 3.6 on page 62 for part requirements.
If your AT10.1 was ordered with 380 or 416 Vac - 50/60 Hz, and you
need to change the factory-wired input voltage, consult the factory for
special instructions.
NOTE: Before starting work, disconnect and lock out all external ac
and dc power sources to the AT10.1. Note that just turning off the front
panel ac and dc circuit breakers is not sufficient to eliminate live
voltages inside the enclosure. Use a voltmeter at the ac terminals
TB1-L1 and TB1-L2, the dc terminals TB1(+) & TB1(-), the dc remote
sense terminals, and any external wiring to alarm relay contacts, to
verify that no voltage is present inside the enclosure.