Xantrex Technology PV-30208 Array Grounding, Ground Fault Detection, Phase-Sequencing

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SECTION 3

INSTALLATION AND INITIAL TURN-ON

Array Grounding

NEC 690-41/42 requires the PV array to be earth grounded. The PV-30208 is shipped with a ground bond for installation between the pv negative terminal block to the pv safety ground terminal block. The PV-30208 chassis is also bonded to the PV safety ground terminal block. This ground bond is clearly marked with a warning label which must be read before installation. For floating PV array configurations, the factory installed PV negative ground bond must not be installed. Installation of this ground bond will cause irreparable damage to the PV-30208. For bipolar PV array configura- tions, the installer must move the ground bond between the PV array midpoint and the safety ground terminal block. Refer to the system schematic in Section 7, Appendix for further wiring configura- tion.

Ground Fault Detection

The PV-30208 is equipped with a ground fault detection circuit and current transducer (CT1 in illustration). This circuit is active when the PV array is grounded as de- scribed in the previous section. In the event of a greater than 10 amp ground fault, the PV-30208 will execute an orderly shutdown and annunciates a ground fault at the operator interface. The PV-30208 will remain faulted until the ground fault is remedied and cleared at the operator interface (see section 5, Troubleshooting).

CAUTION

The input and output circuits are isolated from the enclosure and the system grounding, if required by sec- tions 690-41, 690-42 and 690-43 of the National Elec- trical Code, ANSI/NFPA 70, is the responsibility of the installer.

CT1

CT1

Phase-Sequencing

The PV-30208 is equipped with an automatic sequence-phase-detection control algorithm. This allows the utility interface conductors to be connected in any sequence convenient at the time of installation. Upon system initialization at power-up, the PV-30208 determines the phase sequence of the utility connection and configures the modulator drivers accordingly.

INTERCONNECTION WIRING

CAUTION

To reduce the risk of fire, connect only to a circuit provided with 125 amperes @208VAC, or 50 amperes @480VAC maximum branch circuit overcurrent protec- tion in accordance with the National Electrical Code, ANSI/NFPA 70.

DOCUMENT: 151315PV-30208 Photovoltaic Inverter3-4

Operation and Maintenance Manual

Copyright 2003, Xantrex Technology Inc.

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Contents Copyright 2003, Xantrex Technology Inc South Vasco RoadTable of Contents Main Enclosure Section Product Description IntroductionMajor Components Solar Control Unit SCU Section Product DescriptionInterconnection Standards Compliance Matrix Bus BoardEquipment Symbol Section Product Description SpecificationsPV Ground Fault Detection Section Safety Safety FeaturesEnclosure Front Access Panel Anti Island Protection Section Safety Isolation ProcedureUtility Side Isolation Transformer Requirements Torque and Wire Gauge SpecificationsFloor Mounted Section Installation and Initial TURN-ONInstallation Instructions InstallationSection Installation and Initial TURN-ON Array Grounding Ground Fault DetectionPhase-Sequencing Section Installation and Initial TURN-ON PV-30208 Inverter Wiring Diagram Optional BoxFrame Optional PV Conductor PV Array Ground Jumper Visual Inspection, PV-30208 Visual Inspection, PV Array WiringInitial Power Visual Inspection, Isolation Transformer WYE/WYESystem Verification Fine TuningOperating States Section Operation Description of System OperationOverview Section Operation Operation Features Block Diagram Of Monopolar ConfigurationSection Operation Automatic Wake Up PV Voltage Optimization Peak Power TrackingCurrent Imbalance Detection DC Overvoltage DetectionSection Operation Operator Interface Example of Normal System Operation System Fault System Sleep Test System Stop System ShutdownSection Operation System Operating Parameters User Factory Password Parameter Description Section Operation Fault Conditions Section Troubleshooting GeneralIPM Device Fault 0x0001 Through Fault DescriptionsAC Line Under Frequency Fault Section TroubleshootingAC Line Voltage Low Fault AC Line Voltage High FaultCT Offset Fault AC Line Over Frequency FaultGround Current Fault DC Bus Over Voltage FaultStop Switch Fault Current Imbalance FaultSection Preventative Maintenance Periodic Maintenance TURN-ON Procedure Section Preventative MaintenanceOptional Accessories Section Drawings and Parts List Drawings ListWarranty and Certifications Page Page Page Page Page Enclosure, Upper Page Xantrex PV Series Limited Warranty and Registration
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