Xantrex Technology PV100S-480 installation manual Ground Requirements, System Neutral Requirements

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Planning

Ground Requirements

This product is intended to be installed as part of a permanently grounded electrical system per National Electric Code ANSI/NFPA 70. A copper ground rod must be installed within three feet of the PV100S enclosure. This is the single point earth ground for the inverter system. The single point ground for the system is to be made at the AC ground bus bar (TB2) in the AC Interface Enclosure.

System Neutral Requirements

The PV100S is designed to be installed as a 4-wire system. As required by the UL 1741 listing, a neutral conductor from the utility-interconnect must be terminated at TB6 within the AC Interface Enclosure to ensure that the AC voltage sensing circuit can perform an individual phase voltage (line-to-neutral) measurement. The function of the neutral connection is to provide a point of reference for measurement purposes that is essentially at ground potential. No power will flow through the neutral conductor.

Communication Requirements

The PV100S can accommodate any one of the following options for PC

Communication:

•POTS Connect Kit - uses a MultiTech® 56K Modem, RS232/Fiber Optic Converter (configured for ethernet) and SA2 Surge Arrestor. A direct analog phone line to the local phone service is required to use this feature. The phone line used for PV100S communication cannot be routed through a Private Branch Exchange (PBX) unless an analog PBX card is used.

•Wireless Connect - uses a GSM Wireless Modem.

•Ethernet LAN Connect - uses a data communication device to enable the unit to connect to a local area network.

•Direct Connect Kit - uses a RS232/Fiber Optic Converter (configured for a PC), a DB25-to-DB25 gender changer, and a DB25-to-DB9 Serial Cable.

Determine which communications options are required for the installation and procure the appropriate service or phone access. The personal computer to be used with this unit must have the appropriate hardware as well, such as a 56K modem for dial up connection or a Network Interface Card (NIC) for a LAN connection.

Utility Side Isolation Transformer Requirements

The PV100S is supplied with a custom, high-efficiency, isolation transformer as part of the AC interface/transformer assembly. The utility side windings of the isolation transformer are configured Wye and must match the voltage at the utility inter-tie. The PV100S is a balanced, three-phase, current-sourcing inverter and only operates with the presence of a stable utility voltage. The transformer is also supplied with a neutral connection on the utility interconnect. Connection of this

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Contents PV100S 100 kW Grid-Tied Photovoltaic Inverter Page PV100S 100 kW Grid-Tied Photovoltaic Inverter Date and Revision Audience PurposeScope OrganizationConventions Used Following conventions are used in this guideAbbreviations and Acronyms Related InformationPage Important Safety Instructions Safety Equipment General Safety PrecautionsPersonal Safety Wiring RequirementsSafety Operational Safety Procedures Lockout and TagTo isolate the PV100S De-Energize/Isolation ProcedureInterconnection Standards Compliance Xii Contents Verification InstallationSchematics Tables Xvi Figures Figures Introduction Description of the PV100S 1Dimensions Not to scale System Specifications Electrical SpecificationsSystem Ground Requirements Environmental Specifications 3Environmental SpecificationsMain Enclosure Door Interlock Switch Operator Interface ControlsOn/Off Switch 3On/Off SwitchCommunication Features AC and DC Disconnect SwitchesSystem Status and Fault Reporting Data LoggingCommunication Methods Universal Front Panel Control Unit UfcuPC Connection Methods 6PC Connections in the Communications EnclosurePots Access Ethernet LAN Access Planning Overview of PV100S Installation Ventilation and Serviceability Requirements PV PlanningCommunication Requirements Ground RequirementsSystem Neutral Requirements Utility Side Isolation Transformer RequirementsModel PV100S-208 Electrical Diagrams and SchematicsModel PV100S-480 Layout Options 1PV100S Layout Option a2PV100S Layout Option B Conduit Penetration 3Conduit Entry Figure Reference15 cm 12 30 cm 10.5 27 cm Determine the required cable ampacity Conductor and Conduit SizingTo calculate the proper conduit size Size the cable Size the conduitAnchoring the PV100S 29 73.7 cm 16 ¼ 40.6 cm10AC Interface/Transformer Anchor Bolt Pattern Not to Scale Installation Equipment Required UnloadingMoving the PV100S Unpacking the PV100STo move the PV100S using a forklift Removing the Pallet and Moving the PV100SMounting and Anchoring the Units To mount and anchor the PV100SOpening or Closing Access Doors To lock or unlock the front door on the main inverterTo Open Access Door To Close Access Door7Transformer Access Panels Conduit Installation To install the conduitsWiring General Overcurrent Protection Conductor TerminationWire Gauge and Torque Requirements GroundingSystem Neutral Requirements Utility Side Isolation Transformer RequirementsWiring Specific AC Connections13Tie-wraps on the AC Sense Harness 15AC Terminal Connections in the Main Inverter Enclosure 17Connecting the AC Sense Harness To connect the utility service to AC Interface Enclosure18AC Terminal Connections from the Utility PV Array Connections 19PV Array Cable Routing and TerminationsPC Communications To connect a personal computer using the Pots Connection Establishing a Pots ConnectionEstablishing Wireless Connection To connect a personal computer using the GSM Wireless modemIf connecting the PC directly to the inverter Direct Connection22Direct Connect Installation Verification Verification Procedure Summary Visual Inspection of Mechanical Connections Visual Inspection of Electrical ConnectionsPerform after initial inspection if required Visual Inspection, Isolation Transformer Wye/WyeCorrective Action Schematics This page intentionally left blank Figure A-1Electrical Diagram sample Schematics Appendix a Schematics Appendix a Schematics Appendix a This page was intentionally left blank Index IX-2 Rev C Page Xantrex Technology Inc
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