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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Requirements
Command Module and Drive Module Site Preparation Guide 4-11
Site Wiring
The array modules use wide-ranging, redundant power supplies that automatically
accommodate voltages to the AC power source. The power supplies operate at a range
between 90 VAC and 264 VAC, and at a minimum frequency of 50 Hz and a maximum
frequency of 60 Hz. The power supplies meet standard voltage requirements for both
domestic (inside USA) and international (outside USA) operation. They use standard
industrial wiring with line-to-neutral or line-to-line power connections.
Consider the following information when preparing the array module installation site.
•
Earth ground – The unit must be properly grounded, including an earth ground
conductor on the AC power source.
•
Circuit overloading – Ensure the power circuits and associated circuit breakers in the
cabinet and building provide sufficient power and overload protection. To prevent
possible damage to the unit, isolate its power source from large switching loads (such as
air conditioning motors, elevator motors, and factory loads).
•
Power interruptions – The array modules will withstand the following applied voltage
interruptions (with or without an integrated UPS):
•
Input transient – 50% of nominal voltage
•
Duration – one half cycle
•
Frequency – once every 10 seconds
•
Power failures – After a total power failure, the unit will automatically perform a
power-up recovery sequence without operator intervention once power is restored.