IntroductionEaton 93PM UPS (20–100 kW, 480V – 100 kW Frame) Installation and Operation Manual P-164000227—Rev 6 www.eaton.com/powerquality 1-51.2.3 Sidecar Integrated Accessory Cabinet-BypassA Sidecar Integrated Accessory Cabinet-Bypass (SIAC-B) provides maintenance bypass functions. The SIAC-Bis available in two, three, or four breaker configurations enabling power to completely bypass the UPS. The UPScan then be safely serviced or replaced without interrupting power to critical systems. The four breakerconfiguration provides a convenient method for removing power from the UPS when using the maintenancebypass to supply the load. The SIAC-B is housed in a cabinet attached to the UPS cabinet. The SIAC-B may beinstalled on either the right or left side of the UPS cabinet. The SIAC-B can also be used for top entry wiringaccess.1.2.4 Sidecar Integrated Accessory Cabinet-TieA Sidecar Integrated Accessory Cabinet-Tie (SIAC-T) provides the ability to parallel up to four UPSs together forincreased capacity and/or redundant capability. The SIAC-T is housed in a cabinet attached to the UPS cabinet.The SIAC-T may be installed on either the right or left side of the UPS cabinet. The SIAC-T can also be used fortop entry wiring access.1.2.5 Sidecar Integrated Accessory Cabinet-Tie BypassA Sidecar Integrated Accessory Cabinet-Tie Bypass (SIAC-TB) provides the ability to parallel two UPSs togetherfor increased capacity and/or redundant capability. In addition, maintenance bypass functions enable power tocompletely bypass the UPS power module. The SIAC-TB is housed in a cabinet attached to the UPS cabinet.The SIAC-TB may be installed on either the right or left side of the UPS cabinet. The SIAC-TB can also be usedfor top entry wiring access.1.2.6 Integrated Accessory Cabinet-TieAn Integrated Accessory Cabinet-Tie (IAC-T) provides the ability to parallel up to four UPSs together forincreased capacity and/or redundant capability. The IAC-T is housed in a single, free-standing cabinet designedfor line-up-and-match installation, but may be installed separate from the UPS cabinet. The recommendedinstallation location for an adjacent IAC-D is to the left of the UPS cabinet.1.2.7 Parallel SystemA parallel UPS system with up to eight UPSs can be installed to provide a parallel capacity and/or redundantsystem. This load sharing system provides more capacity than a single UPS, and can provide backup,depending on the load and configuration. In addition, when one UPS is taken out of service for maintenance oris not operating properly, a redundant UPS continues to supply uninterrupted power to the critical load. A built-inController Area Network (CAN) provides connectivity for system metering and operational mode control. Theparallel system consists of two to four UPSs each with a parallel CAN, and an IAC-T, SIAC-T, or SIAC-TB to actas a tie point and to control the output.1.2.8 Top Entry Wiring SidecarIf required, a sidecar is available for top entry power wiring. The sidecar performs the function of a wirewayrouting the wires to the terminals mounted at the bottom of the UPS cabinet. The sidecar can be installed onthe left or right side of the UPS cabinet.NOTE All UPSs in a parallel system must have the same battery configuration. Each UPSrequires a separate battery cabinet.
