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OPERATION and MAINTENANCE
MANUAL
for
MODEL PV-30208
30 kW Grid-Tied Photovoltaic Inverter
Document #151315
Revision E November 17, 2003
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS - THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS
FOR XANTREX TECHNOLOGY MODEL PV-30208 GRID TIED PHOTOVOLTAIC INVERTER
THAT SHALL BE FOLLOWED DURING INSTALLATION AND MAINTENANCE OF THE PV-
30208.
Xantrex Technology Inc.
161-G SOUTH VASCO ROAD
Livermore, CA 94551
(925) 245-5400
Copyright 2003, Xantrex Technology
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Table of Contents Product Description ................................................ Section 1 Introduction .............................................................................1-1 Major Components .................................................................1-1 Interconnection Standards Compliance .....................................1-2 Specifications ..........................................................................1-3 Equipment Symbol ...................................
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SECTION 1 PRODUCT DESCRIPTION INTRODUCTION The Xantrex Technology Model PV-30208 is a 30 kW Grid Tied Photovoltaic Inverter. It utilizes advanced power electronics to allow the interface of a photovoltaic array with an utility grid. The PV- 30208 is a highly integrated assembly, consisting of an inverter bridge and associated control electron- ics. The PV-30208 control software provides for complete overall system control with the required protective and safety features. MAJOR COMPONENTS The maj
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SECTION 1 PRODUCT DESCRIPTION CAUTION The fuses within the PV-30208 are intended for protecting the PV-30208 control cir- cuitry only. They are not intended to provide protection for the PV array or external cabling. Matrix Bus Board The PV-30208 design makes use of a fully integrated matrix bus board as shown in Figure 1-2. The bus board assembly is mounted to an aluminum extrusion heatsink, which is mounted between the upper and lower enclos
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SECTION 1 PRODUCT DESCRIPTION SPECIFICATIONS The PV-30208 has been designed for photovoltaic power systems, which operate within the following specifications. Application of the PV-30208 in a manner inconsistent with these specifications may cause damage to the PV-30208 and other system components, and is a violation of the terms of the warranty. N% ominal AC Line Voltage 208 VAC, +10% -12 Maximum AC Line Current 94 ARMS (at low line voltage) Nz ominal Line Frequency 60 Hz, +0.5 Hz -0.7 H Contin
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SECTION 2 SAFETY SAFETY FEATURES WARNING The PV-30208 enclosure contains exposed high voltage conductors. The upper enclosure access panel should remain closed, except during maintenance or testing. These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock, do not perform any servicing other than that specified in the operating instructions unless you are qualified to do so. Do not remove t
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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
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SECTION 3 INSTALLATION AND INITIAL TURN-ON ISOLATION TRANSFORMER REQUIREMENTS The PV-30208 UL1741 certification requires the use of a Xantrex Technology specified 30 kVA WYE/ WYE isolation transformer between the inverter AC output and the utility interconnection (see Appen- dix in Section 7 for transformer dimensions and specifications). This custom 30 kVA isolation trans- former is not part of the 30 kVA inverter, but can be ordered as a separate item. If maintaining the listing to UL1741 is n
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SECTION 3 INSTALLATION AND INITIAL TURN-ON The following table shows acceptable wire gauges to be connected to the PV-30208 AC and DC inputs. Wire Gauge Table TG ermination Wire Range AW D2 istribution Block (AC) 2/0-# D2 istribution Block (DC) 2/0-# INSTALLATION INSTRUCTIONS CAUTION All wiring methods shall be in accordance with the National Electrical Code ANSI/ NFPA 70. All power conductors interfacing to the PV-30208 should be sized in accordance with the National Electric Code ANSI/NFPA 70
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SECTION 3 INSTALLATION AND INITIAL TURN-ON Figure 3-1 Lift Here Cable Entry Access Panel (Both Sides) Figure 3-3 Figure 3-2 DOCUMENT: 151315 PV-30208 Photovoltaic Inverter 3-3 Operation and Maintenance Manual Copyright 2003, Xantrex Technology Inc.
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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 nega
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SECTION 3 INSTALLATION AND INITIAL TURN-ON The following wires for connecting the PV-30208 to external devices are not provided by Xantrex Technology: (See wiring diagram on page 3-6.) • 3-Phase 208 VAC inverter output to terminals of the 208 VAC primary side of isolation trans- former. The neutral must be left floating. Ground loops will exist when the inverter starts switching, which will cause the inverter to shut down due to phase over-currents and will result in damage to the PV-30208. Also
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SECTION 3 INSTALLATION AND INITIAL TURN-ON DOCUMENT: 151315 PV-30208 Photovoltaic Inverter 3-6 Operation and Maintenance Manual Copyright 2003, Xantrex Technology Inc. Optional PV Conductor Ground Jumper + - A B C PV-30208 Inverter H3 X1 H1 H0 X2 H2 X0 X3 GND PV Array NC (Optional) PV+ Isolation Transformer Frame Ground Line Circuit PV- GND To Single Point Electrical Breaker Distribution System Ground Xantrex Combiner Box (Optional) Wiring Diagram
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SECTION 3 INSTALLATION AND INITIAL TURN-ON INITIAL TURN ON PROCEDURE The following must be performed by an approved Technician: The following procedures are intended to verify correct installation and proper operation of the PV- 30208. These steps are to be followed sequentially. Do not continue if any of the steps or results are unclear. Refer to Section 4 for a detailed description of system operation. Refer to Section 5 for fault condition descriptions and troubleshooting. Refer to Section 7
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SECTION 3 INSTALLATION AND INITIAL TURN-ON • Carefully measure VDC at the PV disconnect switch. The value should be the same as at the PV array string disconnect device. It should also be positive. • Close the PV disconnect switch (if present). • Carefully measure VDC across TBDC+ and TBDC- (PV +/-) terminal block. The value should be the same as at the PV array string disconnect device. It should also be positive. • Open the PV disconnect switch. The matrix capacitor bank voltage should slowly
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SECTION 4 OPERATION DESCRIPTION OF SYSTEM OPERATION Overview The PV-30208 is a fully automated grid-tied photovoltaic inverter. Manual interaction or control of the inverter is necessary only in the event of a system fault. The following conditions govern PV-30208 operation: • Stable utility voltage and frequency must be present for all states of operation. • Fault states are automatic from any state of operation. A fault will cause the PV-30208 to immedi- ately stop processing all power. T
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SECTION 4 OPERATION OPERATION FEATURES Automatic Phase Sequence Detection During system power-up, the PV-30208 detects the phase rotation of the three-phase utility voltage as seen at the inverter output terminals. The control software then determines the proper switching se- quence for the output power stage. It is not necessary to maintain a particular phase sequence conven- tion between the inverter and the utility point of interconnection. Fixed Unity Power Factor Operation The Xan
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SECTION 4 OPERATION Ground Fault Detection The PV-30208 is capable of detecting PV array ground fault current. To enable this feature, a wire must be installed between ground and the desired ground reference point on the PV array. For bipolar PV array configurations, the ground wire must be connected between the PV array neutral point and TB- NEUT terminal block. For grounded monopolar PV array configurations, the ground wire must be connected between TBDC- and TB NEUT terminal blocks (see
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SECTION 4 OPERATION Current Imbalance Detection In the event of phase-to-phase current imbalance of greater than 20% between phases, the inverter will execute an orderly shutdown, and annunciate a fault at the operator interface. See Section 5, Trouble- shooting, for further information on this fault condition. DC Overvoltage Detection In the event of DC voltage greater than 600Vdc, the PV-30208 will execute an orderly shutdown and annunciate a fault to the operator interface. If DC vo
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SECTION 4 OPERATION OPERATOR INTERFACE The PV-30208 is equipped with an Liquid Crystal Display. The display consists of 4 text lines contain- ing the following information: • Line 1: System Status - The current operating state of the inverter. • Line 2: DC Current or Fault Descriptions - This line reports the DC current (amps). If the PV- 30208 is faulted, this line will report a description of the fault condition. • Line 3: Bus Voltage or Fault Code - This line reports the Bus Voltage, in volts
