Eaton Power Xpert Plus 1 Installation And Operation Manual

Also see for Power Xpert 9395: Installation and operation manual Installation and operation manual Installation and operation manual Installation and operation manual Installation and operation manual

Contents

UPS INSTALLATION PLAN AND UNPACKINGPower Xpert 9395 UPS (450–550 kVA) Installation and Operation Manual 164201701 Rev 4 www.eaton.com/powerquality3-18C A U T I O NOn all 9395 models that will be fed by a site generator at any time it is recommended to have an “OnGenerator” sensing input connected and proven functional. This allows the UPS to optimize its operationwith the generator. This function includes reduced input current and battery current limits, slower walk-in toease the load step on the generator initially, and HIGH ALERT mode for ESS and VMMS operation.HIGH ALERT mode is desired because any loads with a leading power factor will not be seen by thegenerator. Rectifier operation will be much softer while on generator thereby increasing overall systemstability.3.2.4 Distributed Bypass Power Wiring PreparationRead and understand the following notes while planning and performing theinstallation: All distributed bypass UPS rectifier inputs must come from one source and allbypass input feeds must come from one source. All UPSs in the distributed bypass system must contain the same number ofUPMs. Mixed UPS kVA ratings are not permitted. Distributed bypass UPS input wiring size requirements and output wiring sizerequirements from the UPSs to the tie cabinet or distribution panel are the same aslisted in Table 3‐4 on page 3-9 and Table 3‐5 on page 3-10. If the load requires a neutral, a bypass source neutral must be provided. In the case of parallel Distributed Bypass configurations, wiring for the commonsystem neutral reference will also be connected to E12 of each module and thiscommon system neutral reference wiring will be routed to the output switchgearcabinet and connected to an isolated / ungrounded bus which is common with thewiring from the E12 terminal of all other paralleled modules of the DistributedBypass system. DO NOT install both a source neutral and a bonding jumper. See Table 3‐7 forneutral bonding jumper wire sizes. The bonding jumper must be copper wire. Eaton UPS systems are designed to operate with two optional ground schemes.Both configurations comply with international safety regulations (as seen on theUPS name plate).- 1. Internal reference generated through an earth reference. Ground current willbe equal to or less than 5% of the unit rating. This takes the form of a UPS Nbus to ground bond wire. This configuration is confirmed by reviewing the unit'sCTO number.- 2. Internally generated reference which avoids ground current. By locating thecenter reference inside the three phase conductors, the relationship betweenthe UPS source and the UPS output is maintained. This is an internal UPSfunction and requires no additional work on the part of the installer or user. Thisconfiguration is confirmed by reviewing the unit's CTO number.C A U T I O NSINGLE HIGH IMPEDANCE GROUND SOURCE - In North American installations, the neutral conductor fromthe high impedance ground source of supply CANNOT be used. DO NOT bond the inverter center point (E12)to ground: this is an internal UPS function and requires no additional work by the installer or user.DUAL HIGH IMPEDANCE GROUND SOURCE - In North American installations, the neutral conductor from thehigh impedance ground source of supply CANNOT be used. DO NOT bond the inverter center point (E12) toground: this is an internal UPS function and requires no additional work by the installer or user. Pleasecontact the Eaton help desk listed in Chapter 1 for additional guidance regarding dual high impedanceground sources.