Section Safety Isolation Procedure | Xantrex Technology PV-30208

SECTION 2

SAFETY

ISOLATION PROCEDURE

Anti Island Protection

A digital phase-shift-loop (PSL) circuit is implemented in the DSP inverter controller to prevent “Islanding” of the PV-30208.

The DSP continuously makes minor adjustments to the power factor phase angle above and below unity. In the event of a utility outage, these adjustments destabilize the feedback between the inverter and the remaining load, resulting in an over/under frequency or voltage condition. The PV-30208 then performs an orderly shutdown. The fault condition will remain until the utility voltage and frequency have returned to normal for 5 minutes.

This method has been extensively tested and proven to exceed the requirements of UL1741.

The following procedure should be followed to de-energize the PV-30208 for maintenance:

WARNING

The terminals of the PV input may be energized if the arrays are energized. In addition, allow 5 minutes for all capacitors within the enclosure to discharge after disconnecting the PV-30208 from AC and DC sources.

1.Turn the on/off switch to the off position.

2.Open the PV array disconnect switch (if present).

3.Open the AC interface disconnect (if present).

4.Open the isolation transformer circuit breaker.

5.Install lockout devices on the isolation transformer circuit breaker and PV disconnect switch (if present).

DOCUMENT: 151315PV-30208 Photovoltaic Inverter2-2

Operation and Maintenance Manual

Copyright 2003, Xantrex Technology Inc.

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Xantrex Technology PV-30208 important safety instructions Section Safety Isolation Procedure, Anti Island Protection

Contents

Copyright 2003, Xantrex Technology Inc South Vasco Road Table of Contents Major Components Section Product Description IntroductionMain Enclosure Solar Control Unit SCU Section Product DescriptionInterconnection Standards Compliance Matrix Bus Board Equipment Symbol Section Product Description Specifications Enclosure Front Access Panel Section Safety Safety FeaturesPV Ground Fault Detection Anti Island Protection Section Safety Isolation Procedure Utility Side Isolation Transformer Requirements Torque and Wire Gauge Specifications Floor Mounted Section Installation and Initial TURN-ONInstallation Instructions Installation Section Installation and Initial TURN-ON Phase-Sequencing Ground Fault DetectionArray Grounding Section Installation and Initial TURN-ON Frame Optional PV Conductor PV Array Ground Jumper Wiring Diagram Optional BoxPV-30208 Inverter Visual Inspection, PV-30208 Visual Inspection, PV Array WiringInitial Power Visual Inspection, Isolation Transformer WYE/WYE System Verification Fine Tuning Overview Section Operation Description of System OperationOperating States Section Operation Operation Features Section Operation Diagram Of Monopolar ConfigurationBlock Automatic Wake Up PV Voltage Optimization Peak Power TrackingCurrent Imbalance Detection DC Overvoltage Detection Section Operation Operator Interface Example of Normal System Operation System Fault System Sleep Test System Stop System Shutdown Section Operation System Operating Parameters User Factory Password Parameter Description Section Operation Fault Conditions Section Troubleshooting General IPM Device Fault 0x0001 Through Fault Descriptions AC Line Under Frequency Fault Section TroubleshootingAC Line Voltage Low Fault AC Line Voltage High Fault CT Offset Fault AC Line Over Frequency FaultGround Current Fault DC Bus Over Voltage Fault Stop Switch Fault Current Imbalance Fault Section Preventative Maintenance Periodic Maintenance TURN-ON Procedure Section Preventative Maintenance Warranty and Certifications Section Drawings and Parts List Drawings ListOptional Accessories Page Page Page Page Page Enclosure, Upper Page Xantrex PV Series Limited Warranty and Registration