Configuring the Rack ATS, Configuring sensitivity

Configuring the Rack ATS

Configuring sensitivity

The sensitivity setting controls how tolerant the Rack ATS is of fluctuations in power before it switches to the secondary power source. Configure the sensitivity range for your Rack ATS using the Switch Configuration menu, which can be found by selecting the Unit tab and the Configuration menu in the left navigation menu. When sensitivity is set to Low, the Rack ATS waits 4 ms before switching to the alternate power source when there is a disturbance in the power supply. When sensitivity is set to High, the Rack ATS waits 2 ms before transferring power. The default setting is High.

Configuring voltage transfer range

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

Note: The default setting of the voltage range is Medium.

APC Part	Nominal Voltage	Narrow	Medium	Wide
Number	(L-N)	Narrow	Medium	Wide
AP7721	230 Vac	±16 (214–246 Vac)	±23 (207–253 Vac)	±30 (200–260 Vac)
AP7722A	230 Vac	±16 (214–246 Vac)	±23 (207–253 Vac)	±30 (200–260 Vac)
AP7723	230 Vac	±16 (214–246 Vac)	±23 (207–253 Vac)	±30 (200–260 Vac)
AP7724	230 Vac	±16 (214–246 Vac)	±23 (207–253 Vac)	±30 (200–260 Vac)
AP7730	200–208 Vac	±15 (185–223 Vac)	±20 (180–228 Vac)	±25 (175–233 Vac)
AP7732	200–208 Vac	±15 (185–223 Vac)	±20 (180–228 Vac)	±25 (175–233 Vac)
AP7750A	120 Vac	±8 (112–128 Vac)	±12 (108–132 Vac)	±20 (100–140 Vac)
AP7752	120 Vac	±8 (112–128 Vac)	±12 (108–132 Vac)	±20 (100–140 Vac)
AP7752J	100 Vac	±5 (95–105 Vac)	±10 (90–110 Vac)	±15 (85–115 Vac)
AP7753	120 Vac	±8 (112–128 Vac)	±12 (108–132 Vac)	±20 (100–140 Vac)

14	Automatic Transfer Switch—Installation and Quick Start