a centralized system static bypass. The available static bypass ratings are 50kW, 60 kVA, 100 kW, 150 kW and 200 kW. The static bypass size is chosenaccording to UPS system power.Eaton 93PM output power ratings are based on 50 kW rated uninterruptiblepower modules (UPMs). A single UPS cabinet can house one to four UPMs toget ratings of:• 1 x 50 kW = 50 kW (or 60 kVA, PF 0.9)• 2 x 50 kW = 100 kW• 3 x 50 kW = 150 kW• 4 x 50 kW = 200 kWSee Section3.7 for a full list of available configurations.A UPM includes a rectifier, inverter, battery converter, and independent controls.Each UPM is able to operate independently from the other power modules.Note: Startup and operational checks must be performed by an authorizedEaton Customer Service Engineer or by other qualified service personnelauthorized by Eaton, or the terms specified in the Warranty (see Chapter10)become void. This service is offered as part of the sales contract for the UPS.Contact service in advance (usually a two-week notice is necessary) toreserve a preferred start-up date.3.1 Looking inside the UPS systemThe system level static bypass in the Eaton 93PM UPS cabinet determines theattainable output power of the UPS. The static bypass line consists of staticswitch, a back feed protection isolation device and fuses designed to protect thestatic switch. The back feed protection and bypass fuses are located in serieswith the static switch. In addition, there is a system level control unit thatconstantly monitors the power delivered through the bypass line or to the inputof the UPS. Transfers to static bypass are seamless and performedautomatically by the system as needed, for example, in case of an extendedsystem overload.Each UPM includes a rectifier, battery converter, inverter and independentcontrols. Each UPM is able to operate and share the load independently,despite the status of the other UPMs.If utility power is interrupted or falls outside the parameters specified in Chapter9, the UPS uses a backup battery supply to maintain power to the critical loadfor a specified period of time or until the utility power returns. For extendedpower outages, the UPS allows you to either transfer to an alternative powersystem (such as a generator) or shut down your critical load in an orderlymanner.Eaton 93PM UPS 30–200 kVA User's and installation guide© Eaton Corporation plc 2017. All rights reserved. Revision: 005 Document ID: P-164000249 16 (126)