Xantrex™ GT250 Grid-Tied Photovoltaic Inverter Xantrex GT250 480 Xantrex GT250 480 PG Xantrex GT250 600 Planning and Installation Manual www.schneider-electric.
Xantrex GT250 Grid-Tied Photovoltaic Inverter Planning and Installation Manual www.schneider-electric.
Copyright and Contact Trademarks Schneider Electric, the Schneider Electric logo, and Xantrex are trademarks or registered trademarks of the Schneider Electric group of companies. Other trademarks, registered trademarks, and product names are the property of their respective owners and are used herein for identification purposes only. Notice of Copyright Copyright © 2008, 2009, 2010 Xantrex Technology Inc. All rights reserved.
About This Manual Purpose The purpose of this Planning and Installation Manual is to provide explanations and procedures for planning and installing the Schneider Electric Xantrex GT250 Grid-Tied Photovoltaic Inverter. Scope The Manual provides safety guidelines, detailed planning and setup information, and procedures for installing the inverter. Audience Anyone who plans to construct or install a system involving the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
About This Manual Organization This Manual is organized into five chapters and two appendices: Chapter 1, “Introduction” provides information about the features and functions of the Xantrex GT250 Grid-Tied Photovoltaic Inverter. Chapter 2, “Planning” provides information to help plan the installation of the Xantrex GT250 Grid-Tied Photovoltaic Inverter. Chapter 3, “Installation” describes the procedures needed to install the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
About This Manual Xantrex GT250 Models This Planning and Installation Manual contains information for three models of the Xantrex GT250 Grid-Tied Photovoltaic Inverter. When all models are being referenced together, they will be referred to as the Xantrex GT250. When the models are being referenced individually, they will be referred to by their model number, as shown in the table below.
About This Manual Abbreviations and Acronyms ANSI American National Standards Institute CCU2 Converter Control Unit 2 CFM Cubic Feet per Minute CW Clockwise DSP Digital Signal Processor GUI Graphical User Interface IEEE Institute of Electrical and Electronics Engineers IGBT Insulated Gate Bipolar Transistor kcmil 1000 circular mils LM Liter per Minute NFPA National Fire Protection Association PV Photovoltaic UFCU Universal Frontpanel Control Unit VFD Vacuum Fluorescent Display R
Important Safety Instructions READ AND SAVE THESE INSTRUCTIONS - DO NOT DISCARD This manual contains important safety instructions for the Xantrex GT250 GridTied Photovoltaic Inverter that must be followed during installation and maintenance procedures. WARNING: Shock Hazard Read and keep this Planning and Installation Manual for future reference. Before operating and maintaining the Xantrex GT250, read all instructions, cautionary markings, and all other appropriate sections of this manual.
Safety WARNING: Multiple sources with risk of electric shock, explosion, and arc flash In order to remove all sources of voltage from the Xantrex GT250, the incoming power must be de-energized at the source. This may be done at the main utility circuit breaker, the PV array disconnect, and by opening the AC disconnect and the DC disconnect switch on the Xantrex GT250.
Safety Risks WARNING: Explosion Hazard The IGBT module may explode in the event of a major malfunction. Do not operate the inverter with the doors open. WARNING: Crush Hazard The inverters have a very high balance point and can easily topple down. Only move while exercising care. WARNING: Burn Hazard Inverters contain components that become hot during normal operation. Do not touch. CAUTION The inverters have a supply air and exhaust air area, which must remain unobstructed.
Safety Personal Safety Follow these instructions to ensure your safety while working with the Xantrex GT250. Never work alone when servicing this equipment. A team of two is required until the equipment is properly de-energized, locked-out and tagged-out, and verified de-energized with a meter. Thoroughly inspect the equipment prior to energizing. Verify that no tools or equipment have inadvertently been left behind.
Safety Wiring Requirements 1. All wiring methods and materials shall be in accordance with the National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements. • Use copper conductors with an insulation rating of 90°C. 2. The Xantrex GT250 has a three-phase, four-wire output. 3. The Xantrex GT250 is interfaced with the AC utility grid at TB1 (TB1-A, TB1-B, TB1-C and TB1-N), located in the lower left side of the enclosure.
Safety CAUTION: Fire Hazard In accordance with the National Electrical Code, ANSI/NFPA 70, connect only to a circuit provided with the following maximum branch circuit overcurrent protection: • Xantrex GT250 480 and Xantrex GT250 480 PG – 400 A • Xantrex GT250 600 – 350 A Inverter Isolation Transformer The Xantrex GT250 includes a custom, high-efficiency, isolation transformer. The utility side windings of the isolation transformer are configured Wye and must match the voltage at the utility inter-tie.
Safety Lock-out and Tag-out (De-energize/Isolation Procedure) Safety requirements mandate that this equipment not be serviced while energized. Power sources for the Xantrex GT250 must be locked-out and tagged-out prior to servicing. A padlock and tag should be installed on each energy source prior to servicing. WARNING: Shock hazard Review the system schematic for the installation to verify that all available energy sources are de-energized. DC bus voltage may also be present.
Safety 7. Ensure that all incoming energy sources are de-energized by checking the following AC utility terminal locations at all line-to-line and all line-to-ground configurations. • AC Utility Terminals: [TB1-A, TB1-B, TB1-C, TB1-N, and TB2 (GND BUS)] See Figure i on page 1–xiv for the location of these terminals.
Safety 8. Ensure that all incoming energy sources are de-energized by checking the following PV terminal locations at PV+ to PV-, PV+ to PV ground, and PV- to PV ground configurations. • PV Terminals: [TB3, TB4 and TB5 (PV GND)] See Figure ii on page 1–xv for the location of these terminals. WARNING: Shock hazard If a ground fault has occurred, there may be potential between TB4 and GND. The normally grounded pole may be energized and ungrounded.
xvi
Contents Important Safety Instructions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -vii 1 Introduction Description of the Xantrex GT250- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2 Power Conversion System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2 Advanced Design Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Contents 2 Planning Overview of Xantrex GT250 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - PV Planning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Environmental Requirements- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Ground Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Contents Verify AC Voltage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Verify DC Voltage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Apply Grid Voltage - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Front Panel Display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Confirm
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Figures Figure 1-1 Figure 1-2 Figure 1-3 Figure 1-4 Figure 1-5 Figure 1-6 Figure 1-7 Figure 1-8 Figure 1-9 Figure 1-10 Figure 1-11 Figure 2-1 Figure 2-2 Figure 2-3 Figure 2-4 Figure 3-1 Figure 3-2 Figure 3-3 Figure 3-4 Figure 3-5 Figure 3-6 Figure 3-7 Figure 3-8 Figure 3-9 Figure 3-10 Figure 3-11 Figure A-1 Main Inverter (Open Enclosure View) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3 Xantrex GT250 Major Sections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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Tables Table 1-1 Table 3-1 Table A-1 Table A-2 Table A-3 Table A-4 Table A-5 Table A-6 Table A-7 Table A-8 DC Terminal Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8 DC Terminal Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–13 Environmental Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2 Electrical Specifications - - - - - - - - - - -
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1 Introduction Chapter 1, “Introduction” provides information about the features and functions of the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
Introduction Description of the Xantrex GT250 The Xantrex GT250 Grid-Tied Photovoltaic Inverter is a utility interactive, three-phase power conversion system for grid-connected photovoltaic arrays with a power rating of 250 kW. Designed to be easy to install and operate, the Xantrex GT250 automates start-up, shutdown, and fault detection scenarios.
Physical Characteristics Physical Characteristics WARNING: Risk of electric shock, explosion and arc flash Turning the ON/OFF switch to the OFF postion does not remove all hazardous voltages from inside the inverter. Before attempting to service the Xantrex GT250, follow the procedure for “Lock-out and Tag-out (De-energize/Isolation Procedure)” on page xiii.
Introduction Power Electronics section AC Interface section Isolation Transformer section DC Interface section Figure 1-2 Xantrex GT250 Major Sections 1–4 153396 Revision D This manual is for use by qualified installers only
Physical Characteristics AC Interface The AC interface serves as the connection for the utility (see Figure 1-2 to locate the AC interface). This compartment (section) houses the AC terminals (TB1-N, -A, -B, and -C), AC disconnect, AC contactor, and EMI filter. Additionally, the Inrush PCB assembly, control power transformer, control fuses, and AC sensing circuitry are also housed in this section.
Introduction Auxiliary Control Interface The Xantrex GT250 has provisions within the AC interface for installing auxiliary control signals, for example, a remote ENABLE/DISABLE signal. Auxiliary control via the remote ENABLE/DISABLE signal is advantageous for coordination of the Xantrex GT250 at specific installations where a pre-existing back-up emergency generator is present. A dry contact circuit at the TB7 terminal is used for remote control of the input signals.
Physical Characteristics Power Electronics The Xantrex GT250 power electronics section contains the converter control unit (CCU2) and the power electronics matrix. Also found within the power electronics section are the Hall-effect current transducers, and an internal air circulation fan. Converter Control Unit (CCU2) The CCU2 is a Digital Signal Processor (DSP) based control board that performs numerous control and diagnostic functions associated with Xantrex GT250 operation.
Introduction DC Terminals TB5 (PV GND) TB3 TB4 Figure 1-5 DC Terminals The terminals provide seven holes with space for fourteen cables with a M10 bore diameter per pole (see Table A-7 on page A–6 for torque requirements). The table below describes the DC terminal polarity for each Xantrex GT250 model.
Physical Characteristics Heater Fans The heater fans provide supplementary heat to Xantrex GT250 inverters installed in particularly cold areas. The heaters are standard on Xantrex GT250 600 inverters, and optional on Xantrex GT250 480 and Xantrex GT250 480 PG inverters.
Introduction Circuit Diagram EMI FILTER CB1 TB1 A AC GRID 3 PHASE B C N BOT TOP A 4 3 B 6 5 C 8 7 N 2 1 T1 250KVA K1 AC CONTACTOR S1 TB3 K2 H1 X1 H2 X2 A L1 L2 + A1 A2 1 2 3 4 5 6 PV+ B C L3 H3 X3 TB4 H0 TB2 POWER MATRIX SH PV- GND LF1 SINGLE POINT TO EARTH GROUND INRUSH LIMIT CCU2 F4 R1 TB5 PV GND Figure 1-7 Xantrex GT250 Circuit Diagram 1–10 153396 Revision D This manual is for use by qualified installers only
Operator Interface Controls Operator Interface Controls WARNING: Risk of electric shock, explosion and arc flash Turning the ON/OFF switch to the OFF postion does not remove all hazardous voltages from inside the inverter. Before attempting to service the Xantrex GT250, follow the procedure for “Lock-out and Tag-out (De-energize/Isolation Procedure)” on page xiii. Operator interface controls are located on the left front door of the main inverter enclosure.
Introduction ON/OFF Switch WARNING: Risk of electric shock, explosion and arc flash Turning the ON/OFF switch to the OFF postion does not remove all hazardous voltages from inside the inverter. Before attempting to service the Xantrex GT250, follow the procedure for “Lock-out and Tag-out (De-energize/Isolation Procedure)” on page xiii. The Xantrex GT250 incorporates a maintained position ON/OFF switch located on the left front door, under the UFCU.
Operator Interface Controls AC Disconnect and DC Disconnect Switch WARNING: Risk of electric shock, explosion and arc flash Disengaging the inverter enclosure door interlock switches does not remove all hazardous voltages from inside the inverter. Before attempting to service the Xantrex GT250, follow the procedure for “Lock-out and Tag-out (De-energize/ Isolation Procedure)” on page xiii. Both enclosure doors of the Xantrex GT250 are equipped with lockout hasps for personnel safety.
Introduction AC Interface DC Interface AC Disconnect (CB1) DC Disconnect switch (S1) Figure 1-10 AC and DC Disconnect Switches 1–14 153396 Revision D This manual is for use by qualified installers only
Communication Features and Methods Communication Features and Methods The Xantrex GT250 provides three types of information to the user: • • • system status and/or fault information, data logging information, and oscillography. System status and fault information can be accessed using the Universal Front Panel Control Unit (UFCU), via an RS232 connection to a PC or via an RS485/ Modbus connection to a remote monitoring system.
Introduction Universal Front Panel Control Unit (UFCU) VFD Display Figure 1-11 VFD Display and UFCU Location 1–16 153396 Revision D This manual is for use by qualified installers only
Communication Features and Methods Data Logging The Xantrex GT250 inverter stores data values and software metrics for debugging. The firmware maintains a data log located in the CCU2 non-volatile memory with a capacity of 25840 32-bit words. The Xantrex GT250 records the 17 parameters listed below, and logs them into a circular buffer, such that the earliest records shall be overwritten once the capacity of the buffer is exceeded.
Introduction Oscillography The Xantrex GT250 includes a graphic data analysis tool known as Oscillography. The inverter firmware continuously records, in the CCU2 nonvolatile memory, 500 samples of data at 1 millisecond intervals. Of these, 250 samples are taken right before a fault occurs and 250 samples are taken after the fault. Once a fault occurs and the 250 samples are logged, the log stops and goes into DONE status. The log will start recording again as soon as the fault is cleared.
2 Planning Chapter 2, “Planning” provides information to help plan the installation of the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
Planning Overview of Xantrex GT250 Installation WARNING: Risk of electric shock, explosion and arc flash Installations of this equipment should only be performed by qualified technicians. Installers must meet all local and state code requirements for licensing and training for the installation of Electrical Power Systems with AC and DC voltage to 600 volts.
PV Planning PV Planning To determine the number of photovoltaic panels that are required for the PV power plant, please use the PV planning tool from the Schneider Electric website: 1. Go to www.schneider-electric.com. 2. Open the Products and Services tab and click Renewable Energies. 3. Navigate to your specific product page. 4. Click Sizing Tools.
Planning Ground Requirements This product is intended to be installed as part of a permanently grounded electrical system per the National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements. A copper clad earth grounding electrode must be installed within 1 m (3 ft.) of the Xantrex GT250 enclosure. This is to be the single point earth ground for the inverter system.
Electrical Diagrams Electrical Diagrams Since installations vary widely, a sample electrical diagram of the Xantrex GT250 is provided in Figure 2-1. This diagram is to be used for system planning purposes only. For more detailed information, refer to the schematic illustrations in the Operation and Maintenance Manual.
Planning Conduit Entry For a typical Xantrex GT250 installation, the recommended cable entry is from beneath the enclosure. Figure 2-2 shows the maximum allowable areas (shaded) and locations in which electrical conduits should be located when cable entry is from beneath the enclosure. When routing cable and conduit, some installations may make it necessary to penetrate the enclosure from above ground.
Conduit Entry AC Interface Conduit Entry 304 × 406 mm (12 × 16 in) AC interface conduit entry points (shaded) as seen in three different views of the same side. DC Interface Conduit Entry 457 × 406 mm (18 × 16 in) DC interface conduit entry points (shaded) as seen in three different views of the same side.
Planning Anchoring the Xantrex GT250 WARNING: Fire hazard Ensure that the Xantrex GT250 is installed on concrete or similar noncombustable surface. If the surface has the potential to be combustable, install a metal tray (not supplied) between the combustable surface and the inverter. The Xantrex GT250 must be anchored to a level concrete floor or pad in accordance with ASCE 7-05.
3 Installation Chapter 3, “Installation” describes the procedures needed to install the Xantrex GT250 Grid-Tied Photovoltaic Inverter. This section includes unpacking and moving instructions, mounting instructions, and cabling instructions.
Installation Unloading WARNING: Heavy Equipment The Xantrex GT250 weighs approximately 2018 kg (4055 lb). Attempting to lift the equipment by other than the recommended lifting points may damage the equipment or present a personnel safety hazard and void the warranty. Keep all the doors closed and latched when moving the enclosures. Leaving the door latches unsecured may result in damage to the unit and void the warranty.
Unloading Removing the Pallet and Moving the Xantrex GT250 CAUTION: Equipment Damage c To move the Xantrex GT250, use a forklift that has a sufficient lift capacity and a 66 cm (26 inch) fork span. symbol). Use Figure 3-1 to locate the balance point or center of gravity ( Center of Gravity 1143mm (45") 700mm (27.5") Front view 330mm (13") Side view Figure 3-1 Center of Gravity Moving with a Forklift Important: Be sure to use a forklift with a 66 cm (26 inch) fork span.
Installation 66 cm (26 In) fork span Figure 3-2 Forklift Lifting Locations - Underneath Unit Moving with a Sling To move the Xantrex GT250 using a sling: 1. Place the lifting slings through the box tubing on the enclosure base at the points specified in Figure 3-3 on page 3–4. 2. Lift the Xantrex GT250 from above. 3. Remove the shipping pallet from beneath the unit. 4.
Unloading Removing the Air Intake Duct The Air Intake Duct may be removed from the rear of the Xantrex GT250 enclosure if it is necessary to move the inverter through a standard 36-inch door opening and into location. To remove the Xantrex GT250 air intake duct: 1. Remove and save the 8 mm nuts (14 total) that attach the air intake duct to the rear of the Xantrex GT250 enclosure. 2. Carefully remove the air intake duct. 3.
Installation Mounting and Anchoring the Units WARNING: Fire hazard Ensure that the Xantrex GT250 is installed on concrete or similar noncombustable surface. If the surface has the potential to be combustable, install a metal tray (not supplied) between the combustable surface and the inverter. To mount and anchor the Xantrex GT250: 1. Predrill the floor or pad to accept ACI 355.2-approved masonry anchors, or ensure it has pre-installed anchoring bolts that will fit the 19 mm (0.75 in) mounting holes.
Opening or Closing Access Doors Opening or Closing Access Doors To open access door: 1. Confirm that the AC disconnect handle is placed in the OFF (Open) position prior to opening the door. 2. Using the key supplied with the unit, turn counterclockwise to unlock. AC Disconnect handle 3. Pull open from right side. To close access door: 1. Confirm that the AC disconnect handle is placed in the OFF (Open) position prior to closing the door. 2. Close the door. 3.
Installation Wiring - General Requirements All wiring methods and materials shall be in accordance with the National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements. When sizing conductors and conduits interfacing to the Xantrex GT250, both shall be in accordance with the National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements.
Wiring - General Requirements Overcurrent Protection Unless provided as part of the Schneider Electric supplied equipment, the AC overcurrent protection for the utility interconnect (Grid-tie) wiring and equipment must be provided by the installer as part of the Xantrex GT250 installation.
Installation Grounding System Grounding This product is intended to be installed as part of a permanently grounded electrical system per the National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements. A copper clad earth grounding electrode must be installed within 1 m (3 ft.) of the Xantrex GT250 enclosure. This is to be the single point earth ground for the inverter system.
Connecting the Conductors Connecting the Conductors This section provides information for connecting the AC and DC conductors and the ground conductors. Table A-6 and Table A-7 show the specifications of the AC and DC wiring. AC Wiring To connect the AC utility to AC interface: 1. Open the door to the AC interface. 2. Connect the AC power conductors at the TB1-A (A phase), TB1-B (B phase), and TB1-C (C phase) terminals using the M10 hardware.
Installation TB1-N terminal TB1-B Phase terminal TB1-A Phase terminal TB1-C Phase terminal Figure 3-8 AC Terminal Connections from the Utility Figure 3-9 Auxiliary Control Interface Terminal Connections 3–12 153396 Revision D This manual is for use by qualified installers only
Connecting the Conductors PV Wiring to the DC Interface To make the connections from the PV array to DC interface: 1. Open the door to the DC interface. 2. Route the PV array cables conductors POSitive (PV+) and NEGative (PV-) through the conduit to the DC interface, entering on the underside. 3. The DC power conductor terminations are made at TB3, as well as TB4 and TB5 (PV GND). See Figure 3-10 for the location of the terminals and Table 31 for DC Terminal polarity for each Xantrex GT250 model. 4.
Installation Remote Communications The Xantrex GT250 has the ability to provide remote communications using optional modems for system monitoring or data logging through a personal computer using the Xantrex GT View Graphic User Interface (GUI) software. Graphic User Interface (GUI) Software The GUI software provides a windows-based interface program that accesses, monitors, and controls the features and functions of the unit.
4 Verification Chapter 4, “Verification” provides a checklist to ensure the installation of the Xantrex GT250 Grid-Tied Photovoltaic Inverter is correct and complete.
Verification Verification Procedure Summary WARNING: Electrocution Hazard This chapter describes specific steps to ensure the installation of the Xantrex GT250 Grid-Tied Photovoltaic Inverter is correct and complete. Failure to adhere to these warnings could result in severe shock or possible death. Exercise extreme caution at all times to prevent accidents. These installation instructions are for use by those familiar and skilled with high voltage procedures.
Visual Inspection of Mechanical Connections Visual Inspection of Mechanical Connections To perform a visual inspection of the Xantrex GT250 mechanical connections: 1. Ensure that the AC and DC disconnect switches, as well as any utility interconnect circuit breakers or main disconnect switches, are opened. ❐ 2. Ensure all anchor bolts and any required seismic bracing is properly tightened and in place. ❐ 3. Remove the latches and open the doors of the AC and DC interface and inspect. ❐ 4.
4–4
5 Commissioning Chapter 5, “Commissioning” contains information for qualified personnel to safely commission the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
Commissioning Commissioning Procedure This section provides the procedure necessary to safely and correctly commission a Xantrex GT250 inverter. Important: It is important to record any issues encountered while following this procedure.
Starting the Commissioning Test Starting the Commissioning Test WARNING: Risk of electric shock, explosion and arc flash Before attempting to perform maintenance on the Xantrex GT250, follow the “Lock-out and Tag-out (De-energize/Isolation Procedure)” on page xiii. Serial Number Enter the information required on the form that appears on page B–2 of Appendix B, “Commissioning Test Record”. The converter serial number is located on a label placed on the lower-left front of the inverter enclosure door.
Commissioning Apply Grid Voltage 1. Verify both Xantrex GT250 inverter enclosure doors are closed and locked. 2. Close the AC disconnect (CB1). This will energize the control power circuits. 3. Look, listen and smell for signs of defects. 4. Record any defects found. Front Panel Display 1. Open, then close, the AC disconnect (CB1) and look at the VFD display of the UFCU. It will display the software versions of the CCU2 and front panel within the READ menu. Record these numbers. 2.
Starting the Commissioning Test Apply DC Voltage 1. Verify both Xantrex GT250 inverter enclosure doors are closed and locked. 2. Close the DC disconnect (S1) switch. This will energize the DC circuits. 3. Look, listen and smell for signs of defects. 4. Record any defects found. Matrix Test 1. Confirm that the ON/OFF switch (S3) in the OFF position. 2. From the front panel, select matrix test from the goal state menu. 3. Verify that the Xantrex GT250 enters the matrix test mode. 4.
Commissioning Revised Protection Settings (If Required) 1. If default protection settings will be changed as authorized by the utility, follow the WRITE menu procedure documented in the Xantrex GT250 GridTied Photovoltaic Inverter Planning and Installation Manual. 2. Access the WRITE menu again by pressing MENU but do not enter the password. 3. Verify all protection settings are correct. 4. Press MENU again to return to the standard menu. Completed Commissioning 1.
A Specifications Appendix A provides the environmental and electrical specifications for the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
Specifications System Specifications The Xantrex GT250 has been designed for photovoltaic power systems, which operate within the following specifications. CAUTION: Equipment Damage Operation of the Xantrex GT250 in a manner other than specified in this manual may cause damage to the Xantrex GT250 and other system components and will void the terms of the warranty. Environmental Specifications Table A-1 Environmental Specifications Specification Value Dimensions 2192.0 mm H x 2286.0 mm W x 1171.
System Specifications Electrical Specifications Table A-2 provides the AC and DC specifications for the Xantrex GT250. Table A-2 Electrical Specifications Specification Xantrex GT250 480 and Xantrex GT250 480 PG Xantrex GT250 600 Nominal AC Input Voltage (+10% to -12% acceptable range) 480 Vac (423 to 528 Vac) 600 Vac (528 to 660 Vac) Maximum Continuous AC Output Current 301 Arms 240 Arms Nominal AC Input Frequency 60 Hz 60 Hz (+0.5 to -0.7 Hz acceptable range) (57.0 to 60.5 Hz) (57.0 to 60.
Specifications Over Voltage, Under Voltage and Frequency Ranges Table A-4 provides the over voltage, under voltage, over-frequency, and under-frequency detection limits for the Xantrex GT250. These detection limits have been factory tested and deemed to be in compliance with UL1741 2nd Ed. and IEEE 1547 requirements for utility interaction.
System Specifications Table A-5 Over/Under Voltage and Over/Under Frequency Ranges Vac Condition (% of Nominal) Xantrex GT250 600 Voltage Range Trip Time Vac < 50% Vac < 300 10 cycles 300 <= Vac < 528ª 24 cycles 528 < Vac <= 660 normal operation 660 < Vac < 720ª 12 cycles 720>= Vac 10 cycles f < 57.0 10 cycles f < 59.3ª 10 cyclesª f > 60.
Specifications Bolt Sizing and Torque Requirements Table A-6 provides acceptable bolt sizes, and torque values for AC terminal connections. Table A-6 AC Terminal Bolt Size and Torque Values AC Terminal Connections Max. # of Conductors Bolt (Hardware) per Terminal or Hole Size Torque Requirements PE (Enclosure Ground) 2 1 / M10 75 Nm (55 lb ft) TB1-A, TB1-B, 1 1 / 0.
Dimensions Dimensions 2192.0 mm (86.3 in) 2286.0 mm (90.0 in) 1171.0 mm (46.
A–8
B Commissioning Test Record Appendix B contains the Commissioning Test Record for the Xantrex GT250 Grid-Tied Photovoltaic Inverter.
B–2
Commissioning Test Record Commissioning Test Record Step 1. Record and Document Serial Number and Inverter Location Date and Time of Commissioning: Inverter Serial Number: CCU Board Serial Number: Installation Name: Technician Name: Inverter Location (Site ID): Company Name: Address: Contact Email: City: State: Zip: Country: Step 2. Installation and Cable Check Power Conductors installed correctly: Yes Terminations are properly torqued: Yes Step 3.
Commissioning Test Record Step 10. Commanding Goal State: Matrix Test Xantrex GT250 enters Matrix Test mode: Yes Notes: Step 11.
Index A E Abbreviations and Acronyms vi AC Interface 1–5 AC Interface Enclosure 1–6 AC Utility Terminals 1–5 Access Doors 3–7 Advanced Design Features 1–2 Air Intake Duct, Removing 3–5 ambient environment 2–3 ambient temperature 2–3 Anchoring 2–8 Anti-islanding 1–2 Auto-Phase Rotation 1–2 Auxiliary Control Interface 1–6 Auxiliary Enable/Disable 1–12 Electrical Diagrams 2–5 Emergency Stop 1–12 Environmental 2–3 Equipment 3–2 External cabling 2–3 C center of gravity 3–3 CFM vi Chassis Grounds 3–10 Circuit
Index ON/OFF Switch 1–12 Operational Safety xii Operator Interface Controls 1–11 Optional Equipment 1–18 Oscillography 1–18 Overcurrent Protection 3–9 Overview 2–2 P Personal Safety x Physical Characteristics 1–3 Planning 2–2 Power Conversion System 1–2 Power Electronics 1–7 Power Electronics Matrix 1–7 PV vi PV Planning 2–3 Verification Procedure Summary 4–2 VFD vi VFD Display 1–16 Visual Inspection of Electrical Connections 4–3 Visual Inspection of Mechanical Connections 4–3 W Wiring Auxiliary Control
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