APC 150kVA PDU W/ 480 PRI 208/120 SEC K1 XMER Specifications download pdf (Page 18)

10 150 kW InfraStruXure Power Distribution Unit

Emergency Power Off (EPO)

Overview

To provide a mechanism for applying emergency power off, attach a remote switch to the EPO

interface on the user connection plate. The EPO interface () is connected to the PDU monitoring

unit () by way of the user connection plate, which in turn connects to the main input breaker on the

PDU and to the internal EPO switch on an APC UPS or other APC-connected device ().

When EPO is activated, the main input breaker on the PDU opens (turns OFF). In addition, the enable

switch on the UPS opens (turns OFF) and the DC disconnect breakers serving the UPS open (turn

OFF). The last two actions negate power to the PDU from the UPS inverters and batteries.

Note

The main input breaker on the PDU is equipped with a shunt trip for emergency power

off. The shunt trip can be activated for EPO functionality by connecting an appropriate

power source (24 VAC or 24 VDC) to the EPO interface on the user connection plate.

Note

APC offers an optional InfraStruXure EPO system (EPW9). Contact your APC sales

representative, or visit the APC Web site (www.apc.com) for more information.

See “Connect an Emergency Power Off Switch” on page 17 for instructions on how to

connect an EPO switch to the PDU.

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APC 150kVA PDU W/ 480 PRI 208/120 SEC K1 XMER Specifications Page 18