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OPERATION and MAINTENANCE
MANUAL
for
MODEL PV-225208
225 kW Grid-Tied Photovoltaic Inverter
Document #151811
Revision C November 26, 2003
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS - THIS MANUAL CONTAINS IMPORTANT INSTRUC-
TIONS FOR XANTREX TECHNOLOGY MODEL PV-225208 GRID TIED PHOTOVOLTAIC
INVERTER THAT SHALL BE FOLLOWED DURING INSTALLATION AND MAINTENANCE
OF THE PV-225208.
Xantrex Technology Inc.
161-G SOUTH VASCO ROAD
Livermore, CA 94550
(925) 245-5400
Copyright 2003, Xantrex Techn
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Table of Contents Product Description ................................................. Section 1 Introduction ........................................................................... 1-1 Major Components ................................................................ 1-1 Control Components.............................................................. 1-2 Interconnection Standards Compliance ................................. 1-3 Specifications ................................................
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SECTION 1 PRODUCT DESCRIPTION INTRODUCTION The Xantrex Technology Model PV-225208 is a current following grid tied photovoltaic inverter, utilizing state-of-the-art IPM (Intelligent Power Module), insulated gate bi-polar transistors (IGBT’s) and gate drive circuits to allow interface of a photovoltaic array with a utility grid. The PV-225208 consists of an inverter bridge, photovoltaic controller, and associated control electronics. The PV-225208 control software provides for complete overall sy
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SECTION 1 PRODUCT DESCRIPTION AC Interface Enclosure This enclosure is NEMA-3R rated. The AC Interface serves as the connection between the isolation transformer/utility and the PV-225208. This enclosure is where the AC line fuses and AC disconnect switch reside. For specific control components see Drawing No. 151809 in Section 7 (Appendix). DC Interface Enclosure This enclosure is NEMA-3R rated. The DC Interface serves as the connection interface between the PV array and the PV-225208
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SECTION 1 PRODUCT DESCRIPTION Power Control Unit (PCU) The PCU is a Digital Signal Processor (DSP) based control board that performs numerous control and diagnostic functions associated with PV-225208 operation. Its most significant tasks are control of PV-225208 electromechanical components and power electronics converters, signal conditioning for high voltage signal inputs and communication with the operator interface panel and system sensors. The PCU also contains the necessary DC power
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SECTION 1 PRODUCT DESCRIPTION SPECIFICATIONS The PV-225208 has been designed for photovoltaic power systems, which operate within the following speci- fications. Application of the PV-225208 in a manner inconsistent with these specifications may cause damage to the PV-225208 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 695 ARMS (at low line voltage) Nz ominal Line Frequency 60 Hz, +0.5 -0.7 H Con
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SECTION 2 SAFETY SAFETY FEATURES WARNING The PV-225208 enclosure contains exposed high voltage conductors. The enclosure doors should remain locked, 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 open the cabinet doo
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SECTION 2 SAFETY Over/Under Voltage and Frequency The over/under frequency and voltage detection setpoints have been chosen to be in compliance with IEEE-929 and UL1741. Fault Condition Ve oltage Range Trip Tim (% of Nominal) VC AC < 50% V< A1s 04 6 Cycle 5< 0%VC AC < 88% 1< 04 < VA1s 83 2 Second 8< 8% V< AC1C 10% 1< 83 < VA2n 28 Normal Operatio 15 10% < VAC < 137%2s 28 < VAC < 28 2 Second 1< 37%V5 AC 2< 8Vs AC 2 Cycle f3 < rated -0.7fs < 59. 6 Cycle f5 > rated +0.5fs > 60. 6 Cycle Ant
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SECTION 3 INSTALLATION AND INITIAL TURN-ON ISOLATION TRANSFORMER REQUIREMENTS The PV-225208 UL1741 certification requires the use of a Xantrex Technology specified 225 kVA WYE/ WYE isolation transformer between the inverter AC output and the utility interconnection (See Appendix in Section 7 for transformer dimensions and specifications. This custom 225 kVA isolation transformer is not part of the 225 kVA inverter, but can be ordered as a separate item. If maintaining the listing to UL1741 is no
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SECTION 3 INSTALLATION AND INITIAL TURN-ON The following table shows acceptable wire gauges to be connected to the PV-225208 AC and DC inputs. Wire Gauge Table Termination Wire Range AWG Up to 4 600MCM-#2 Compression Lug (AC) Conductors Per Phase Up to 8 600MCM-#2 Compression Lug (DC+ and Conductors for each (+) and DC-) (-) Up to 2 350MCM-#6 Terminal Block (DC Neutral) Conductors INSTALLATION INSTRUCTIONS CAUTION All wiring methods shall be in accordance with the National Electrical Code ANSI/
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SECTION 3 INSTALLATION AND INITIAL TURN-ON Lift Here Figure 3-1 Cable Entry Cable Entry Area Area Figure 3-2 Array Grounding NEC 690-41/42 requires the PV array to be earth grounded. The PV-225208 chassis is also bonded to the PV safety ground terminal block. Refer to the system schematic in the appendix for further wiring configura- tion. DOCUMENT: 151811 PV-225208 Photovoltaic Inverter 3-3 Operation and Maintenance Manual Copyright 2003, Xantrex Technology Inc.
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SECTION 3 INSTALLATION AND INITIAL TURN-ON Ground Fault Detection The PV-225208 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 described in the previous section. In the event of a greater than 10 amp ground fault, the PV-225208 will execute an orderly shutdown and annunciates a ground fault at the operator interface. The PV-225208 will remain faulted until the ground fault is remedied and c
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SECTION 3 INSTALLATION AND INITIAL TURN-ON DOCUMENT: 151811 PV-225208 Photovoltaic Inverter 3-5 Operation and Maintenance Manual Copyright 2003, Xantrex Technology Inc. Circuit Breaker AC Interface DC Interface N A B C A B C To Single Point Electrical GND PV- PV+ Distribution System Ground PV Array PV-225208 Inverter X0 X3 H3 X2 H2 X1 H1 H0 Isolation Wiring Diagram Transformer Frame Ground Chassis Gnd
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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-225208. 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 (+) terminal. The value should be the same as at the PV array string disconnect switch. It should also be positive. • Open all PV string disconnect switches. • Close the isolation transformer circuit breaker. • Verify 208 VAC voltage across the AC disconnect switch. If a phase rotation meter is available, verify proper phase rotation at the AC disconnect switch. • Close the AC disconnect switch. • Verify 208 VAC voltage across the AC line fuses F1-3.
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SECTION 3 INSTALLATION AND INITIAL TURN-ON Power Tracker Fine Tuning: • All PV-225208 operating parameters have been set at the factory, based upon prior experience with PV arrays. Contact your Xantrex Technology distributor for further information. • It is recommended that the PV-225208 be watched during Wake-Up and Sleep Test. If the PV-225208 cycles between operating and sleeping at either of these times, the condition setpoints are not set properly (refer to section 4 for detailed descr
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SECTION 4 OPERATION DESCRIPTION OF SYSTEM OPERATION Overview The PV-225208 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-225208 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-225208 to immediately stop processing all power.
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SECTION 4 OPERATION The user should be aware of the following conditions governing PV-225208 state transitions: • Utility power must be present for all states of operation. • Fault states are automatic from any state of operation. A fault will cause the PV-225208 to immediately stop processing all power. The fault condition will be reported to the operator interface LCD. • Most PV-225208 faults are latching and must be cleared at the operator interface keypad before transitioning to ano
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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 ex- ecute an orderly shutdown, and annunciate a fault at the operator interface. See Section 5, Troubleshooting, for further information on this fault condition. DC Overvoltage Detection In the event of DC voltage greater than 600Vdc, the PV-225208 will execute an orderly shutdown and annunciate a fault to the operator interface. If DC v
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SECTION 4 OPERATION the limits mandated by UL1741. Any changes to these setpoints should be agreed upon by the local utility and the equipment owner. The ability to adjust the voltage and frequency setpoints with respect to the actual utility voltage and frequency has been provided as a simulation tool to verify the PV-225208 accurately detects and responds to a utility excursion. This test should only be performed by a trained service technician. It is possible to adjust the setpoints in a mann
