Safety
016-537-B0-002 Rev. B 8
© 2002
TM
Utility Power Connection Notes
NOTE: UL and NEC require that a service disconnect switch (UL listed) be
provided by the installer and be connected between the power source and
the Alpha power supply. Connection to the power supply must include an
appropriate service entrance weather head.
CAUTION: A “high magnetic” trip breaker must be used in order to accommodate the
high-inrush currents normally associated with the start-up of ferroresonant
transformers (400 Amp, no-trip, first-half cycle). Do not replace this
breaker with a conventional service entrance breaker. Alpha recommends
only Airpax breakers because of increased reliability in this powering
application.
CAUTION: Installation must be performed by qualified service personnel only, and in
compliance with local electrical codes. Connection to utility power must
be approved by the local utility before installing the power supply.
Warning! Do not unplug output connector while unit is in operation! Circuit breaker
must be turned off first.
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