Tripp Lite PDUMNH32HVAT OWNER’S MANUAL

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6. Configuration and Operation

6.1 Automatic Transfer Switch

When the Source A and Source B inputs are both connected to power sources, the ATS operates

as an Automatic Transfer Switch, providing redundant input power for high availability applications.

The ATS will distribute power from the preferred input source under normal operating conditions

and switch to the other input source under abnormal conditions. The default preferred source is

Source A (Refer to the Navigating Config Menus and Submenus section for instructions on

changing the preferred source). The ATS will switch to the preferred source whenever it is “Good”

according to the ATS input voltage definitions (see section 6.1.2).

6.1.1 Preferred Configuration

The Automatic Transfer Switch function provides increased availability when the Source A and

Source B inputs of the ATS are connected to separate power sources. For maximum availability, it

is recommended, when using UPS Systems, that the UPS systems are matching with pure sine

wave output for the Source A and Source B input power sources. The automatic transfer switch

function will be compromised if the Source A and Source B inputs are connected to the same

utility power source.

Source B Power Source

Source B Input Cord

Equipment

Loads

Source A Input Cord

Source A Power Source

Power Strip

Utility AUtility B

Facility Circuit Facility Circuit

ATS

208V

/ L1 - L2

5A OUTPUT

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Tripp Lite PDUMNH32HVAT 7.7kW Single-Phase 200-240V Monitored Automatic Transfer Switch PDU, Two 32A IEC309 32A Blue Inputs, 1 IEC309 32A Outlet, 1U