Apc 600 User Manual download pdf (Page 21)

5.0 Operation

5.5 Option switches

The UPS has a set of four DIP switches on the rear panel which allow you

to configure several options (see Secs. 5.5.1–5.5.4).

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(

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Note: You can set option switches at any time, and the effect is immediate.

Note: If all of the option switches are set to the on position, the option switches are

disabled. However, the functions controlled by the option switches are still

available using UPS monitoring software (see Sec. 5.6.4).

5.5.1 Option Switch 1

The UPS contains utility fault detection circuitry that is extremely sensitive

to line voltage distortions including spikes, notches, sudden dips, and

swells. The UPS is factory-set to react to such line voltage distortions by

immediately transferring the load to on-battery operation, affording

maximum protection for all load types. Where power quality is poor

because of local cyclic heavy load-switching, or the use of inexpensive fuel

generators, the UPS may frequently transfer to on-battery. If the UPS is

powering loads that operate normally under such conditions, battery

capacity may be spent unnecessarily.

Setting Option Switch 1 to the on (I ) position desensitizes the UPS to rapid

low-amplitude line-voltage fluctuations, and increases the UPS’s upper

transfer voltage by 3%, for a total of 13% above the nominal input voltage.

This helps maintain maximum battery capacity for major utility failures.

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Apc 600 User Manual Page 21