American Power Conversion Automatic Transfer Configuring the ATS, Configuring sensitivity

Configuring the ATS

Configuring sensitivity

The sensitivity setting controls how tolerant the ATS is of fluctuations in power before it switches to the secondary power source. Configure the sensitivity range for your ATS using the Switch Configuration menu. When sensitivity is set to low, the ATS will wait 5 ms before switching to the alternate power source when there is a disturbance in the power supply. When sensitivity is set to high, the ATS will wait 3 ms before transferring power. The default setting is high.

Configuring voltage transfer range

The voltage transfer range determines the acceptable RMS voltages for the ATS. When voltage moves outside the specified range, the ATS switches to the secondary power source. Configure the voltage transfer range using the Switch Configuration menu. The ATS can be set to narrow, medium, or wide voltage ranges depending on the power conditions of your system.

The default setting of the voltage range is Medium.

Note

APC Part Number	Nominal Voltage	Narrow	Medium	Wide
	(L–N)
AP7701	120 V	20 (110–130 V) 23 (108.5–131.5 V)		27	(106.5–133.5 V)
AP7722	230 V	30 (215–245 V) 35 (212.5–247.5 V)		40	(210–250 V)
AP7750	120 V	20 (110–130 V) 23 (108.5–131.5 V)		27	(106.5–133.5 V)

14 Automatic Transfer Switch - Installation and Quick Start