Eaton 9315 Installation And Operation Manual

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Eaton 9315/9390/9395 Fixed Master Sync Control Installation and Operation Manual P-164000023 Rev 1 www.eaton.com/powerquality 4-1Chapter 4 OperationThis chapter describes the operation of the Eaton Fixed Master Sync Control with aUPS system.4.1 Startup for UPS Systems Equipped with an Eaton Fixed Master Sync ControlStartup and operational checks must be performed by an authorized Eaton CustomerService Engineer, or the warranty terms as specified on page 5-1 become void. Thisservice is offered as part of the sales contract for the UPS. Contact service in advance(usually a two-week notice is required) to reserve a preferred startup date.4.2 Understanding Eaton Fixed Master Sync Control OperationW A R N I N GAttempts to startup the SBM system yourself may damage equipment and/or your critical load. Such attemptsmay also invalidate your system warranty.C A U T I O NAs shipped the Eaton Fixed Master Sync Control is configured for operation with a normally open contact for the“ON BYPASS” signal. The jumper across terminal points TB1-40 and TB1041 MUST be removed if a normallyclosed contact is used for the “ON BYPASS” signal. Removal of this jumper must be performed by an Eatonauthorized service person. Removal or installation of this jumper by anyone other than an Eaton authorizedservice person may damage the equipment and/or the critical load and void the warranty.The Eaton Fixed Master Sync Control maintains critical load synchronization of twoseparate single UPS systems or to an Eaton Hot Sync-Capacity System (non-master).See Figure 4‐1 for a typical block diagram of the system. Synchronization of the UPSsystems facilitates the uninterrupted transfer of customer loads from one load bus toanother by means of downstream, dual-source, solid-state transfer switches. Enablethe automatic synchronization action of the Eaton Fixed Master Sync Control bypressing the LOAD SYNC ENABLE pushbutton on the front of the panel.When enabled, the LOAD SYNC ENABLE pushbutton illuminates.The Eaton Fixed Master Sync Control panel provides a three-phase synchronizationreference to each system. Each system uses this reference to regulate the inverterphase relationship so that the two system outputs can maintain synchronization witheach other. To establish the three-phase synchronization reference, each systemprovides bypass sensing voltage and output (critical load) bus voltage to the EatonFixed Master Sync Control.Under normal operating conditions, bypass sensing voltage from the non-mastersystem is provided back to its own inverter through the Sync Control. As long as thebypass sources feeding the non-master system and the master system are availableand in‐phase with each other and the master critical load is in phase with its ownbypass, the non-master system remains synchronized with its own bypass sourceand the two systems remain synchronized with each other. If the non-mastersystem's bypass becomes out of phase with the master system bypass (>0.1 Hzapart), the master critical load loses sync with its own bypass, or one or both sourcesbecome unavailable, the Sync Control provides a new synchronization reference tothe slave system. The non-master system's new reference is provided by the FixedMaster Sync Control from the output (critical load) bus of the master system (SeeFigure 4‐1).Figure