Download Alpha APP60S Operating instructions

The AM / AP Series Standby Power Supply
IMPORTANT TECHNICAL NOTE
CAUTION:
When operating the AP Series Standby Power Supply, a minimum
load of at least 1.5 Amperes (approximately 10% of the output
rating of the power supply) must be connected to the output. Failure
to do so could damage the load or the unit’s ferroresonant power
transformer.
Damage caused by this condition will not be covered under warranty.
For further information, contact AlphaTechnologies or your nearest
Alpha representative.