APC AP7721 User's Manual
Contents
1. Arc www ape com Rack Automatic Transfer Switch for AP7721 AP7723 User s Guide Addendum 208 Vac Applications Available power cords Note A power cord is not provided with the unit Q For AP7721 use a UL Listed CSA certified power cord rated 300 Vac 15 A 14 AWG For AP7723 use a UL Listed CSA certified power cord rated 300 Vac 20 A 12 AWG Both should be used with an approved plug and outlet The length of a power supply cord shall not exceed 4 5 m The minimum length of a power supply cord shall be 1 5 m unless it is intended for a special installation such as dedicated equipment intended to be mounted near a receptacle Voltage setting Warning The AP7721 and AP7723 Rack Automatic Transfer Switches ATS have default AN settings of 230 Vac nominal voltage and a default transfer range set to medium or 23 Vac Before using the Rack ATS in a 208 Vac application change the nominal voltage setting to 208 Vac through the Web interface or control console Change the nominal voltage setting to prevent the Rack ATS from being damaged If you do not reset the nominal voltage the Rack ATS will switch between power source A and power source B when the load drops below 207 Vac Setting the nominal voltage See the Web Interface or Control Console chapters in the Rack ATS User s Guide for further information about accessing and configuring the Rack ATS settings through the Web interface or control consol2. e Web interface 1 Select the Unit tab 2 Select frequency voltage under the Configuration left navigation menu option 3 Change the Line VRMS field to 208 and select Apply to save the change Control console 1 Select Device Manager from the main menu of the Control Console interface 2 Select ATS Configuration from the Device Manager menu 3 Select Line VRMS from the ATS Configuration menu 4 Enter 208 and press ENTER 5 Select Accept Changes from the ATS Configuration menu to save changes Customer support and warranty information is available at the APC Web site Wwww apc com 990 3459 2008 American Power Conversion All rights reserved All APC trademarks are 08 2008 property of American Power Conversion Other trademarks are property of their MN WO ll APC respective owners
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