Alpha Technologies Micro, Micro XL, Micro XL3 UPS - Manual (Page 15)

13 017-237-B0 Rev A
3. Site Planning
WARNING!
The Alpha Micro must be installed in a restricted area accessible only by qualified ser-
vice personnel.
The Alpha Micro must be correctly grounded for proper operation according to local
and national electrical code.
Branch Circuit Protection: The utility line attached to the Alpha Micro input MUST be
protected by a circuit breaker certified for this use in accordance with the local electri-
cal code.
The AC input and AC output must each have a disconnect device attached. This device
can be a listed branch circuit protection device or a disconnect switch used on AC Line
only. Neutral or ground must never be disconnected by the user except during installa-
tion or maintenance.
3.1 Safety Precautions
• Install the Alpha Micro and batteries in a restricted access location, and on a structure that supports the
total weight.
• The input wiring must reach a suitably grounded power outlet and the load wiring must reach the
Alpha Micros output terminal blocks.
• In the Generator mode, the Alpha Micro’s range of acceptable input frequency and voltage is expanded to
accept the fluctuations created by a generator. See “Operating the Alpha Micro, Sense Type”.
Use a generator with electronic speed and voltage controls which produces less than 10% voltage to-
tal harmonic distortion (THD). Mechanical governors can force the Alpha Micro to run continuously in
the Battery mode. Before installation, make sure the generator’s output voltage is compatible with the
Alpha Micro’s input voltage requirements. To make sure the system runs smoothly, use a generator that
supplies twice as much power as drawn by the total load.
3.2 Electromagnetic Compatibility (EMC) Requirements
Observe the following EMC requirements when setting up the Alpha Micro and its internal equipment:
• All AC mains and external supply conductors must be enclosed in a metal conduit or raceway when speci-
fied by local, national, and/or other applicable government codes and regulations.
• The customer facilities must provide suitable surge protection.