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GT100-208-NG

Xantrex GT100-480-NG, GT100-480-PG, GT100-208-PG, GT100-208-NG Planning And Installation Manual

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Planning and Installation Manual
Xantrex
™
GT100 Grid-Tied Photovoltaic Inverter
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Xantrex™ GT100 Grid-Tied Photovoltaic Inverter
Planning and Installation Manual
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About Xantrex
Xantrex Technology Inc. is a world-leading supplier of advanced power electronics and controls with products ranging from small mobile units to utility-scale systems for wind, solar, batteries, fuel cells, microturbines, and backup power applications in both grid-connected and stand-alone systems. Xantrex products include inverters, battery chargers, programmable power supplies, and variable speed drives that convert, supply, control, clean, and distribute electrical power.
Trademarks
Xantrex is a registered trademark of Xantrex International. 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
GT100 Grid-Tied Photovoltaic Inverter Planning and Installation Manual© April 2008 Xantrex Internation al. A ll rights reserved.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, XANTREX TECHNOLOGY INC. (“XANTREX”) (
A) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY TECHNICAL OR OTHER
INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.
(
B) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR EXPENSES, WHETHER SPECIAL,
DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION.
T
HE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S RISK; AND
(C) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH, ALTHOUGH STEPS HAVE BEEN
TAKEN TO MAINTAIN THE ACCURACY OF THE TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED XANTREX CONTENT IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION WHICH IS POSTED AT WWW.XANTREX.COM.
Date and Revision
April 2008 Revision B
Manual Part Number
153379
Contact Information
Telephone: 1 800 670 0707 (toll free North America)
1 408 987 6030 (direct) Fax: 1 800 994 7828 (toll free North America) Email: customerservice@xantrex.com Web: www.xantrex.com
This manual for use by qualified installers only
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About This Manual
Purpose
The purpose of this Planning and Installation Manual is to provide explanations and procedures for planning and installing the GT100 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 GT100 Grid-Tied Photovoltaic Inverter. 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.
Organization
This Manual is organized into four chapters and one appendix: Chapter 1, “Introduction” provides information about the features and functions
of the GT100 Grid-Tied Photovoltaic Inverter. Chapter 2, “Planning” provides information to help plan the installation of the
GT100 Grid-Tied Photovoltaic Inverter. Chapter 3, “Installation” describes the procedures needed to install the GT100
Grid-Tied Photovoltaic Inverter. This section includes unpacking and moving instructions, mounting instructions, and cabling instructions.
Chapter 4, “Verification” provides a checklist to ensure the installation of the GT100 Grid-Tied Photovoltaic Inverter is correct and complete.
Appendix A provides the environmental and electrical specifications for the GT100 Grid-Tied Photovoltaic Inverter.
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About This Manual
Conventions Used
The following conventions are used in this guide.
WARNING
W arnings identify conditions or practices that could result in personal injury or loss of life.
CAUTION
Cautions identify conditions or practices that could result in damage to the unit or other equipment.
GT100 Models
Important:
serious as a caution or warning.
This Planning and Installation Manual contains information for four models of the GT100 Grid-Tied Photovoltaic Inverter.
Two of the models are designed to operate with a 208 Vac utility input; one configured for a negative grounded PV array (GT100-208-NG), and the other configured for a positive grounded PV array (GT100-208-PG).
•The model GT100-208-NG Grid-Tied Photovoltaic Inverter (208 Vac input,
negative grounded) will be referred to as the GT100-208-NG when it is being referenced individually.
•The model GT100-208-PG Grid-Tied Photovoltaic Inverter (208 Vac input,
positive grounded) will be referred to as the GT100-208-PG when it is being referenced individually.
Additionally, two of the models are designed to operate with a 480 Vac utility input; one configured for a negative grounded PV array (GT100-480-NG), and the other configured for a positive grounded PV array (GT100-480-PG).
•The model GT100-480-NG Grid-Tied Photovoltaic Inverter (480 Vac input,
negative grounded) will be referred to as the GT100-480-NG when it is being referenced individually.
•The model GT100-480-PG Grid-Tied Photovoltaic Inverter (480 Vac input,
positive grounded) will be referred to as the GT100-480-PG when it is being referenced individually.
When all models are being referenced together, they will be referred to as the GT100.
These notes describe things which are important for you to know, but not as
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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 PSL Phase-Shift Loop
About This Manual
Related Information
You can find more information about Xantrex Technology Inc. as well as its products and services at www.xantrex.com.
PV Photovoltaic UFCU Universal Frontpanel Control Unit VFD Vacuum Fluorescent Display
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Important Safety Instructions
SAVE THESE INSTRUCTIONS - DO NOT DISCARD
This manual contains important safety instructions for the GT100 Grid-Tied 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 GT100, read all instructions, cautionary markings, and all other appropriate sections of this manual. Failure to adhere to these warnings could result in severe shock or possible death. Exercise extreme caution at all times to prevent accidents.
WARNING: Shock Hazard
The GT100 Inverter Enclosure contains exposed high voltage conductors. The Inverter enclosure doors should remain closed with the latches tightened, except during maintenance or testing. These servicing instructions are for use by qualified personnel who meet all local and governmental code requirements for licensing and training for the installation of Electrical Power Systems with AC and DC voltage to 600 volts. To reduce the risk of electric shock, do not perform any servicing other than that specified in the installation instructions unless you are qualified to do so. Do not open the cabinet doors if extreme moisture is present (rain or heavy dew).
WARNING: Lethal Voltage
In order to remove all sources of voltage from the GT100, the incoming power must be de­energized at the source. This may be done at the main utility circuit breaker and by opening the AC Disconnect and the DC Disconnect Switch on the GT100. Review the system configuration to determine all of the possible sources of energy. In addition, allow five minutes for the DC bus capacitors to discharge after removing power. Follow the “Lockout and Tag” procedure on page xi to de-energize the GT100.
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.
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Safety
Risks
WARNING: Shock hazard
Parts of the capacitor charge will still be energized for a maximum of five minutes after being disconnected. Open doors only after the device is disconnected and discharged. Check whether the device is no longer live (DC voltage) including terminals TB3 and TB4.
WARNING: Explosion hazard
The IGBT module may explode in the event of a major malfunction. The G T100 enclosure doors should remain closed with the latches tightened, except during maintenance or testing.
WARNING: Crush hazard
The inverters have a specific balance point that correlates to their Center of Gravity and can topple down. Exercise care when moving the GT100.
WARNING: Amputation hazard
The inverters contain integrated ventilators including rotating ventilator wheels. Do not place fingers in ventilator.
WARNING: Burn hazard
Inverters contain components that become hot during normal operation. Do not touch.
CAUTION: EQUIPMENT DAMAGE
The GT 100 incorporates an air supply and exhaust air area, which must remain unobstructed. The device can overheat and be destroyed if the installation instructions are not adhered to.
CAUTION: EQUIPMENT DAMAGE
Sensitive electronics inside the GT100 can be destroyed when touched and when electrostatically charged. Discharge via earth potential before touching and wear appropriate protective gear.
CAUTION: EQUIPMENT DAMAGE
No connections or disconnections are to be made at the terminal strips or internal connectors during operation. Turn unit off before performing terminal work; wait five minutes (capacitor charge) and recheck to ensure internal components are no longer live.
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General Safety Precautions
1. When installing the GT100 use only components recommended or sold by Xantrex. Doing otherwise may result in a risk of fire, electric shock, injury to persons, and will void the warranty.
2. Do not attempt to operate the GT100 if it has been dropped, or received more than cosmetic damage during transport or shipping. If the GT100 is damaged, or suspected to be damaged, see the Warranty section of this manual.
3. To reduce the risk of electrical shock, lock-out and tag the GT100 before attempting any maintenance, service, or cleaning.
Personal Safety
Follow these instructions to ensure your safety while working with the GT100.
Qualified Personnel
Only qualified personnel should perform the transportation, installation and initial operation and maintenance of the GT100 in accordance with National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements. Follow all national accident prevention regulations.
Safety
Qualified personnel, within the meaning of these basic safety regulations, will be people who are familiar with the installation, assembly, start-up and operation of the GT100 and have the appropriate qualifications with respect to their functions.
Safety Equipment
Authorized service personnel must be equipped with standard safety equipment including the following:
• Safety glasses
• Ear protection
• Steel-toed safety boots
• Safety hard hats
• Padlocks and tags
• Appropriate meter to verify that the circuits are de-energized
Check local safety regulations for other requirements.
(1000 Vac and DC rated, minimum)
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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 only with an insulation rating of 90 °C. The
optional Fused Combiner (GTFC), if insta l led, requires the use of copper conductors only with a maximum insulation rating of 75°C.
2. The GT100 has a three-phase, four wire output.
3. The GT100 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. These terminals require the use of a UL-approved crimp-on type ring terminal or a UL-approved compression-type lug certified for use with the chosen interface cables. Keep these cables together as much as possible and ensure that all cables pass through the same knockout and conduit fittings, allowing any inductive currents to cancel. For torque values, see Table A-5 on page A–5. See Figure 1-3 on page 1–5 for the location of these terminals.
4. The AC neutral terminals (H0 and X0), shall be left floating (not connected) on both the utility and inverter sides of the isolation transformer. See page 2– 4 for details.
5. The GT100 is interfaced with the DC photovoltaic array at either the Fused Combiner (GTFC) or TB3, as well as TB4 and TB5 (PV GND), located in the lower right side of the enclosure. Do not connect the grounded power conductor from the PV array directly to TB5 (PV GND); doing so will bypass the ground fault detector and violate the NEC. The TB3, TB4, and TB5 terminals require the use of a UL-approved crimp-on type ring lug or a UL­approved compression-type lug certified for use with the chosen interface cables. The Fused Combiner assembly includes box style connectors for cable termination. Keep these cables together as much as possible and ensure that all cables pass through the same knockout and conduit fittings, allowing any inductive currents to cancel. For acceptable torque values for the box style connectors and the TB3, TB4, and TB5 terminals, see Table A-6 and Table A­7 on page A–5. See Figure 1-5 on page 1–8, Figure 1-6 on page 1–9, Table 1­1 on page 1–8, and Table 1-2 on page 1–9 for the location and polarity of these terminals.
6. This product is intended to be installed as part of a permanently grounded electrical system as 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 3 ft. (1 m) of the GT100 enclosure to ensure compliance with FCC Part 15, Class A. The AC ground bus bar (TB2), located in the lower left side of the GT100 enclosure, must be used as the single point connection to the earth grounding electrode for the inverter system.
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7. The equipment grounds on the GT100 are marked with
8. AC overcurrent protection for the utility interconnect (Grid-tie) must be provided by the installers as part of the GT100 installation.
CAUTION: Fire Hazard
In accordance with the National Electrical Code, ANSI/NFPA 70, connect only to a circuit provided with 400 amperes maximum branch circuit overcurrent protection for model GT100­208-NG and GT100-208-PG, and only to a circuit provided with 200 amperes maximum branch circuit overcurrent protection for model GT100-480-NG and GT100-480-PG.
Inverter Isolation Transformer
The GT100 includes a custom, high-efficiency, isolation transformer. The utility side windings of the isolation transformer are configured W ye and must match the voltage at the utility inter-tie. The GT100 is a balanced, three-phase, current­sourcing inverter and only operates with the presence of a stable utility voltage. The transformer is supplied with a neutral connection on both the Primary and Secondary windings. Connection of these neutral terminals will affect the operation of the GT100 and must be left floating or disconnected. Single-phase, grounded loads which may be present between the transformer and utility, will maintain their existing ground reference at the utility distribution transformer.
Safety
CAUTION: Equipment Damage
If the Isolation Transformer neutral (H0 and X0) terminals are tied to ground, they may cause irreparable damage to the GT100. Check local regulations for their requirements regarding the connection of these neutrals.
Operational Safety Procedures
Never work alone when servicing this equipment. A team of two is required until the equipment is properly de-energized, locked-out and tagged, and verified de­energized with a meter.
Thoroughly inspect the equipment prior to energizing. Verify that no tools or equipment have inadvertently been left behind.
Lockout and Tag
Safety requirements mandate that this equipment not be serviced while energized. Power sources for the GT100 must be locked-out and tagged prior to servicing. A padlock and tag should be installed on each energy source prior to servicing.
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Safety
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. Be sure to wait the full five minutes to allow the capacitors to discharge completely
The GT100 can be energized from both the AC source and the DC source. To ensure that the inverter is de-energized prior to servicing, lockout and tag the GT100 using the following procedure.
1. Turn the GT100 main ON/OFF switch (S3) to the OFF position. This stops the inverter from exporting power to the AC utility grid.
2. Open, lockout, and tag the incoming power at the utility main circuit breaker.
3. Open, lockout, and tag the AC Disconnect (CB1) on the left side of the GT100. See Figure 1-8 on page 1–11 for the location of the AC Disconnect.
4. Open, lockout, and tag the DC Disconnect Switch (S1) on the right side of the GT100. See Figure 1-8 on page 1–11 for the location of the DC Disconnect Switch.
CAUTION
Once the DC Disconnect Switch (S1) is open, there will be DC voltage on the PV Array side of the switch where TB3, TB4 and TB5(PV GND) are located. This voltage may be as high as the Open-Circuit Voltage of the PV Array and is limited to 600VDC per NEC
690.
5. Using a confirmed, accurate meter, verify all power to the inverter is de­energized. A confirmed, accurate meter must be verified on a known voltage before use. Ensure that all incoming energy sources are de-energized by checking the following 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 1-3 on page 1–5 for the location of these terminals.
• PV Terminals: [TB3, TB4, and TB5 (PV GND)]
See Figure 1-5 on page 1–8 for the location of these terminals.
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De-Energize/Isolation Procedure
The following procedure should be followed to de-energize the GT100 for maintenance.
WARNING
The terminals of the DC input may be energized if the PV arrays are energized. In addition, allow five minutes for all capacitors within the main Enclosure to discharge after disconnecting the GT100 from AC and DC sources.
To isolate the GT100:
1. Turn the main
2. Open the utility connection circuit breaker.
3. Open the AC Disconnect (CB1).
4. Open the DC Disconnect Switch (S1).
5. Install lockout devices on the utility connection circuit breaker, AC and DC disconnect switch.
ON/OFF switch (S3) to the OFF position.
Safety
Interconnection Standards Compliance
The GT100 complies with FCC Part 15 Class A requirements. The GT 100 is designed to meet NEC Article 690 and UL1741-2005 Static
Inverters And Charge Contr ollers For Use In Photovoltaic Power Systems, which includes testing for IEEE 1547.1-2005, IEEE 929-2000 and IEEE 519-2000.
Intended Use
The G T100 may only be used in connection with PV modules. It is not suitable for any other application areas.
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Contents
Important Safety Instructions 1
Introduction
Description of the GT100 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2
Power Conversion System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2 Advanced Design Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2
Physical Characteristics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3
AC Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
AC Utility Terminals - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5 Auxiliary Control Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6 Communications Circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6
Power Electronics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
Converter Control Unit (CCU2) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7 Power Electronics Matrix - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
DC Interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8
DC Terminals - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8 Fused Combiner (Optional) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9
Circuit Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10
Operator Interface Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11
On/Off Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–12 Emergency Stop (E-STOP) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–12 Auxiliary Enable/Disable - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–12 AC Disconnect and DC Disconnect Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–13
Communication Features and Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–14
System Status and Fault Reporting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–14 Data Logging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–16 Oscillography - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–17
Optional Equipment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–18
Communication Modems - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–18 PV Combiner - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–18
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -vii
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Contents
2
Planning
Overview of GT100 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2 PV Planning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3 Environmental Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3 Ground Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4 System Neutral Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4 Inverter Isolation Transformer - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4 Electrical Diagrams - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5 Conduit Entry - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–6 Anchoring the GT100 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–8
3
Installation
Unloading - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Moving the GT100 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2 Unpacking the GT100 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2 Removing the Pallet and Moving the GT100 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Moving with a Forklift - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3 Moving with a Sling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4 Removing the Air Intake Duct - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
Removing the Rainhood - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6 Mounting and Anchoring the Units - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–7 Opening or Closing Access Doors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8 Wiring - General - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
Overcurrent Protection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–10 Conductor Termination - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–10 Grounding - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–11 System Neutral - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–11
Wiring - Specific - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–12
PV Array Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–14
Remote Communications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–15
PC Connection Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–15
Modbus - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–15
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4
Verification
Verification Procedure Summary - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–2 Visual Inspection of Mechanical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3 Visual Inspection of Electrical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3 Corrective Action - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3
A
Specifications
System Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–2
Environmental Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–2 Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–3 Regulatory Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–3 Over Voltage, Under Voltage and Frequency Ranges - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–4 Bolt Sizing and Torque Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–5
Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -A–6
Contents
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Figures
Figure 1-1 Main Inverter (Open Enclosure View) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3 Figure 1-2 GT100 Major Sections- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4 Figure 1-3 AC Utility Terminals- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5 Figure 1-4 Remote Control Terminal Connections- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6 Figure 1-5 DC Terminals- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8 Figure 1-6 GT Fused Combiner Connectors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9 Figure 1-7 GT100 Circuit Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10 Figure 1-8 GT100 Operator Interface Components - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11 Figure 1-9 On/Off Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–12 Figure 1-10 AC and DC Disconnect Switches- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–13 Figure 1-11 VFD Display and UFCU Location- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–15 Figure 2-1 GT100 Electrical Diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5 Figure 2-2 Conduit Entries Beneath Enclosure, Bottom View - - - - - - - - - - - - - - - - - - - - - - - - - 2–6 Figure 2-3 Conduit Entries Above Ground, Multiple Views - - - - - - - - - - - - - - - - - - - - - - - - - - 2–7 Figure 2-4 Main Inverter Anchor Bolt Pattern, Bottom View- - - - - - - - - - - - - - - - - - - - - - - - - - 2–8 Figure 3-1 Center of Gravity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3 Figure 3-2 Forklift Lifting Locations - Underneath Unit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4 Figure 3-3 Moving with a Sling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4 Figure 3-4 Removing the Air Intake Duct- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5 Figure 3-5 Removing the Rainhood- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6 Figure 3-6 AC Interface Access Door - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8 Figure 3-7 DC Interface Access Door - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8 Figure 3-8 Single-point Ground; Ground Bar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–11 Figure 3-9 AC Terminal Connections from the Utility - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–13 Figure 3-10 Auxiliary Control Interface Terminal Connections - - - - - - - - - - - - - - - - - - - - - - - - - 3–13 Figure 3-11 PV Array Cable Routing and Terminations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–14 Figure 3-12 Modem Kit as Installed in the AC Interface- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–15 Figure A-1 GT100 Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–6
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Tables
Table 1-1 DC Terminal Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8 Table 1-2 DC Terminal Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9 Table 3-1 DC Terminal Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–14 Table A-1 Environmental Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–2 Table A-2 Electrical Specifications- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–3 Table A-3 Regulatory Specifications- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–3 Table A-4 Over/Under Voltage and Over/Under Frequency Ranges- - - - - - - - - - - - - - - - - - - - - A–4 Table A-5 AC Terminal Bolt Size and Torque Values - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–5 Table A-6 DC Terminal Bolt Size and Torque Values - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–5 Table A-7 DC Terminal Conductor Range and Torque Values - - - - - - - - - - - - - - - - - - - - - - - - A–5 Table A-8 Auxiliary Control Interface Screw Size and Torque Values - - - - - - - - - - - - - - - - - - - A–6
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1
Introduction
Chapter 1, “Introduction” provides information about the features and functions of the GT100 Grid-Tied Photovoltaic Inverter.
Page 26
Introduction
Description of the GT100
The GT100 Grid-Tied Photovoltaic Inverter is a utility interactive, three-phase power conversion system for grid-connected photovoltaic arrays with a power rating of 100 kW . Designed to be easy to install and operate, the GT100 automates start-up, shutdown, and fault detection scenarios. With user-definable power tracking that matches the inverter to the array and adjustable delay periods, users are able to customize startup and shutdown sequences. Multiple GT100 inverters are easily paralleled for larger power installations.
Power Conversion System
The G T100 power conversion system consists of a pulse-width modulated (PWM) inverter, switch gear for isolation and protection of the connected AC and DC power sources. Housed in a rugged NEMA 3R rated, corrosive resistant, powder­coated steel enclosure, the GT100 incorporates sophisticated Insulated Gate Bipolar Transistors (IGBTs) as the main power switching devices. An advanced, field-proven, Maximum Peak Power Tracker (MPP T) integrated within the GT100 control firmware ensures the optimum power throughput for harvesting energy from the photovoltaic array.
Advanced Design Features
The advanced design of the GT100 includes an EMI output filter and the main AC contactor located electrically on the utility side of the isolation transformer to minimize transformer tare losses when the unit is not operating.
The GT100 also includes an Inrush Limit assembly to prevent nuisance Utility Circuit Breaker trips when the isolation transformer is energized.
A sophisticated control scheme optimizes the operation of the GT100 cooling fan as needed for increased overall system efficiency.
Additionally, the GT100 integrated controller contains self-protection features including over and under voltage and frequency safeguards in compliance with UL 1741 Rev 2005.
Anti-islanding An integral anti-island protection scheme prevents the inverter from feeding
power to the grid in the event of a utility outage.
Auto-Phase Rotation
The GT100 includes the ability to auto-sense and correct for a “mis-phased” connection at the AC Interface terminals. In the event the power conductors from the utility is not phased correctly at the AC Interface terminals, the GT100 will sense the discrepancy and automatically correct for a clockwise (A-B-C) phase rotation.
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Physical Characteristics
Local Display and Remote Graphic User Interface
The GT100 includes a local user interface comprised of an ON/OFF switch, keypad, and 4-line, 80 character VFD display.
A user-friendly, Xantrex GT View Graphic User Interface (GUI) provides a remote interface for operator interrogation of GT100 system status, control, metering/data logging and protective functions within the GT100. The status, control, and logging features are supported by an optional modem via an RS232 connection for remote monitoring. Alternatively, a user selectable RS485/Modbus connection is also available for remote plant monitoring.
Physical Characteristics
The GT100 is assembled in a single NEMA-3R, corrosive resistant, powder­coated enclosure that includes two access doors to house the electronics described above. Internally, the GT100 is compartmentalized to include sections for the AC Interface (left side), the Power Electronics (upper middle), the Isolation Transformer (lower middle), and the DC Interface (right side). The single enclosure is constructed and delivered as one complete assembly.
These sections are identified in Figure 1-2.
Figure 1-1
153379 1–3
Main Inverter (Open Enclosure View)
Page 28
Introduction
Power Electronics section
AC Interface section
Figure 1-2
Isolation Transformer section
GT100 Major Sections
DC Interface section
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AC Interface
AC Utility Terminals
Physical Characteristics
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.
N
A
B
TB1
C
TB2
Figure 1-3
AC Utility Terminals
Each terminal provides one hole with space for two cables with a M10 bore diameter (see Table A-5 on page A–5 for torque requirements).
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Introduction
Auxiliary Control Interface
The GT100 has provisions within the AC Interface for installing auxiliary control signals that include a remote Emergency Stop and a remote Enable/Disable signal.
Auxiliary Control via the remote Enable/Disable signal is advantageous for coordination of the GT100 at specific installations where a pre-existing back-up emergency generator is present.
Two separate dry contact circuits at the TB7 terminal are used for remote control of the input signals. Circuit termination and signal type are identified in T able A-8 on page A–6.
Figure 1-4
Remote Control Terminal Connections
Communications Circuit
The GT 100 can be remotely accessed through an RS232 serial port or through an RS485/Modbus connection. Xantrex offers modems that can be connected to the RS232 port for remote monitoring. The remote user has the ability to control and monitor the status of the inverter through this connection.
Alternatively, a user selectable RS485/Modbus connection is also available for remote plant monitoring. The CCU2 Controller board within the GT100 may be configured for RS485 serial communication using the Modbus protocol. This enables users to monitor and control the inverter from a dedicated plant wide monitoring system.
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Power Electronics
The GT100 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 GT100 operation. Its most significant tasks are control of GT100 electromechanic al components and power electronics converters, communication with the Universal Front Panel Control Unit, and system sensors. The CCU2 also contains the necessary DC power supplies to support its operation.
Power Electronics Matrix
The power electronics converter matrix consists of switching transistors (IGBTs), transistor gate drive electronics, laminated DC bus structure, DC capacitors and an aluminium extrusion heatsink with cooling fan. The fan is located behind the matrix assembly, and forces air down through the heatsink.
The PV array is tied logically to the matrix DC bus within the DC Interface section. The embedded CCU2 control unit manages the transfer of power between the DC bus and the utility grid.
Physical Characteristics
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Introduction
DC Interface
DC Terminals
The DC Interface serves as the connection interface between the PV array and the GT100 (see Figure 1-2 on page 1–4 to locate the DC Interface). This section houses the DC Disconnect Switch and DC contactor. Additionally, the PV Ground Fault Detection circuitry , DC sur ge arrestor, Solid State Relays, and 48Vdc Power Supply are also housed in this section.
Figure 1-5
TB5
(PV GND)
DC Terminals
TB3 TB4
The terminals provide space for six holes with space for twelve cables with a M10 bore diameter per pole (see Table A-6 on page A–5 for torque requirements).
The table below describes the DC terminal polarity for each GT100 model.
Table 1-1
Model TB3 TB4 TB5
GT100-208-NG PV+ PV– PV GND GT100-208-PG PV– PV+ PV GND GT100-480-NG PV+ PV– PV GND GT100-480-PG PV– PV+ PV GND
DC Terminal Polarity
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Fused Combiner (Optional)
Physical Characteristics
Figure 1-6
TB5
(PV GND)
GT Fused Combiner Connectors
The fuse blocks of the optional Fused Combiner (GTFC) assembly provide one box style connector per pole (see Table A-7 on page A–5 for acceptable wire range and torque requirements.)
The table below describes the DC terminal polarity for each GT100 model with the GTFC installed.
Table 1-2
Model GTFC TB4 TB5
GT100-208-NG PV+ PV– PV GND GT100-208-PG PV– PV+ PV GND GT100-480-NG PV+ PV– PV GND GT100-480-PG PV– PV+ PV GND
DC Terminal Polarity
GTFC TB4
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Introduction
Circuit Diagram
A
AC GRID
B
3 PHASE 60HZ
C
N
GND
Figure 1-7
TB1
A
B
C
N
TB2
SINGLE POINT
TO
EARTH GROUND
CB1
BOT
TOP
4
3
6
5
8
7
2
1
GT100 Circuit Diagram
FILTER
LF1
EMI
L1
L2
L3
K1
AC CONTACTOR
INRUSH LIMIT CCU2
T1
100KVA
H1
X1
H2
X2
H3
X3
H0
SH
A
B
C
POWER MATRIX
K2
A2
A1
F4
S1
1
536
2
4
TB3
TB4
R1
TB5
PV GND
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Operator Interface Controls
Operator interface controls are located on the left front door of the main Inverter Enclosure. These controls include an ON/OFF Switch, 4-line VFD display and keypad called the Universal Frontpanel Control Unit (UFCU) used to manipulate and view system operation and status. The keypad is comprised of 20 touch-sensitive keys that provide a means to navigate through the menus and alter user-changeable settings. Additionally , there is an AC Disconnect switch handle and DC Disconnect switch handle on the AC Interface door (left) and the DC Interface door (right) respectively.
VFD Display
Universal Frontpanel Control (UFCU)
Operator Interface Controls
On/Off Switch
DC Disconnect Switch (S1)
AC Disconnect (CB1)
DC InterfaceAC Interface
Figure 1-8
153379 1–11
GT100 Operator Interface Components
Page 36
Introduction
On/Off Switch
The GT100 incorporates a maintained position ON/OFF switch located on the left front door, under the UFCU. Under normal operating conditions, the
ON position. Turning the switch to the OFF position will initiate an immediate controlled
ON/OFF switch is in the
shutdown of the GT100 and open both the main AC and DC contactors within the unit. The main AC and DC contactors cannot be closed unless the switch is in the The GT100 is prevented from being restarted until the
ON position.
the
ON/OFF switch is turned back to
ON position.
WARNING: Shock Hazard
Turning the ON/OFF switch to the OFF position does NOT remove all hazardous voltages from inside the inverter. Before attempting to service the GT100, follow the de-energize Lockout and Tag procedure on page xi.
Figure 1-9
On/Off Switch
Emergency Stop (E-STOP)
Provisions are supplied for adding a remote emergency stop. Circuit termination and signal type are identified in Table A-8 on page A–6
Auxiliary Enable/Disable
The GT100 also has provisions for installing an auxiliary Enable/Disable switch in series with the local control. This is advantageous for coordination of the GT100 at specific installations where a pre-existing back-up emergency generator is present. Circuit termination and signal type are identified in Table A-8 on page A–6
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AC Disconnect and DC Disconnect Switch
Both enclosure doors of the G T100 are equipped with lockout hasps for personnel safety . The enclosure doors should not be opened while the GT100 is operating.
The switch handles and shafts provide a mechanical door interlock for both the AC and DC Interface sections. The doors cannot be opened when the switches are in the position.
Although the Main ON/OFF switch (S3) is recommended for an orderly shutdown, the DC Disconnect switch is equipped with an auxiliary contact block which enables the switch to be used as a load break DC disconnect. In the event the DC Disconnect switch is opened while the GT100 is processing power from the PV array, the early-break contact block will signal the CCU2 (Converter Control Unit) to stop processing power prior to opening the DC Disconnect switch.
Additionally, opening the DC Disconnect switch will cause the GT100 to execute an immediate orderly shutdown, open both the main AC and DC contactors, and report a PV disconnect fault on the VFD of the UFCU.
Both GT100 enclosure doors must be closed and locked during normal operation.
Operator Interface Controls
ON
AC Disconnect switch (CB1)
Figure 1-10
AC Interface
AC and DC Disconnect Switches
DC Disconnect switch (S1)
DC Interface
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Introduction
Communication Features and Methods
The GT100 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. Data logging and oscillography is available via the RS232 or the RS485/Modbus connection.
The GT100 communicates system status information to the user using the following methods.
• The Front Panel Control Unit (UFCU) Display
• PC Connection (Remote) - GT View Graphic User Interface (GUI) Software required (may require additional hardware)
• External Monitoring - (Optional) via an RS485/Modbus connection for remote plant monitoring.
System Status and Fault Reporting
Basic system status and all fault conditions rising from within the GT100 are reported to the UFCU. The 4-line VFD will display a hexadecimal value and a brief text description of the fault. Additionally, the CCU2 stores the time and details of all faults in non­volatile memory for later retrieval.
The fault value is also made available to the GT View Graphic User Interface (GUI) via the RS485/Modbus protocol and will include a more extensive description of the fault.
The UFCU keypad is located on the left door to manipulate and view system operation and status. The keypad is comprised of 20 membrane switch keys that provide a means to navigate through the menus and alter user-settable settings.
See the GT100 Grid-Tied Photovoltaic Inverter Operation and Maintenance Manual (Part #: 153378) for details.
Types of status information include:
• Current Operating State or Goal State
• Fault Code (if applicable)
• Inverter State
• Line Voltage and Current
• Inverter Matrix Temperature
•Inverter Power
•PV State
• PV Voltage and Current
• PV Power
• Grid Frequency
• Peak Power Tracker Enabled
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Universal Front Panel Control Unit (UFCU)
Communication Features and Methods
Figure 1-11
VFD Display
VFD Display and UFCU Location
153379 1–15
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Introduction
Data Logging
The G T100 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 GT100 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. The log capacity is 25840 / 20 = 1292 records (each record has 2 words for timestamp and 18 words for parameters). Data logging requires the use of a PC connection using the GT View Graphic User Interface (GUI) software or via the RS485/Modbus connection.
The following is the list of parameters which values shall be stored in the data logging records:
•Inverter Vab
•Inverter Vbc
•Inverter Vca
• I Phase A
• I Phase B
• I Phase C
•Grid Freq
•Real Power
• PV Voltage
• PV Current
• PV Power
•System State
•Fault Code
• Intake air Temp.
•Matrix Temp.
• Analog input
• Fan speed control
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Oscillography
Communication Features and Methods
The GT100 includes a graphic data analysis tool known as Oscillography. The inverter firmware continuously records, in the CCU2 non-volatile 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. Oscillography requires the use of a PC connection using the GT View Graphic User Interface (GUI) software or via the RS485/Modbus connection.
The following is the list of parameters which instant values shall be stored in the oscillography records:
• Vab - Grid voltage phase A to phase B
• Vbc - Grid voltage phase B to phase C
• Vca - Grid voltage phase C to phase A
• Ia - Grid current phase A
• Ib - Grid current phase B
• Ic - Grid current phase C
• Grid Hz - Grid frequency
• DC_V - PV array voltage
• DC_I - PV array current
• Fault - hexadecimal code of the fault
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Introduction
Optional Equipment
The following options are available for purchase for use with the GT100 to enhance its capability. Contact a Xantrex distributor for further information on installation options.
Communication Modems
Xantrex offers modems that can be connected to the RS232 serial port for remote monitoring of the inverter. Please check with Xantrex on available modem types.
The remote user has the ability to control and monitor the status of the inverter through this connection.
PV Combiner
The GT100 is available with an optional fused sub-array combiner (GTFC). The GTFC-fused combiner is integrated in the inverter enclosure and allows for multiple runs from the PV Arrays to the inverter directly into a fuse for circuit protection.
The GTFC Fused Combiner assemblies are available for the GT100 Grid-Tied Photovoltaic Inverter in the following configurations.
• GTFC 100A (Xantrex p/n 1-153509-01), six individual Class RK5 fuses rated at 100A
• GTFC 150A (Xantrex p/n 1-153510-01), four individual Class RK5 fuses rated at 150A
• GTFC 200A (Xantrex p/n 1-153511-01), three individual Class RK5 fuses rated at 200A
See Figure 1-6 on page 1–9 and Table 1-2 on page 1–9 for the location and polarity of these assemblies.
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2
Planning
Chapter 2, “Planning” provides information to help plan the installation of the GT100 Grid-Tied Photovoltaic Inverter.
Page 44
Planning
Overview of GT100 Installation
WARNING: Shock Hazard
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.
Planning Planning for a system requires complete understanding of all the components that
are involved to successfully install the G T100 to meet the required national, state, and local codes.
Definition A power system (such as the GT100) is a collection of devices designed to supply
AC power to the utility grid from a DC solar energy (PV) source.
Components All types of grid-tied inverter installations, residential or industrial, share common
components. This chapter describes each component and suggests the minimum requirements for a safe installation.
Location The GT100 Grid-Tied Photovoltaic In verter meets certification for both indoor
and outdoor installation. Anchor the GT100 to a level, concrete floor or pad.
Clearance Adequate ventilation and service access must be taken into consideration when
installing the GT100. See “Environmental Requirements” for specific clea rance requirements and ambient temperature requirements.
Conduits and Conductors
All external conduits and conductors are to be supplied by the installer. See Figure 2-3, “Conduit Entries Above Ground, Multiple Views” on page 2–7 for recommendations on enclosure penetration locations and cable routing.
All interconnect wiring and power conductors interfacing to the G T100 must be in accordance with the National Electric Code ANSI/NFPA 70, and any applicable local codes.
Large gauge wire must conform to the minimum bend radius specified in the NEC, Article 373-6B, Ninth Edition.
Take care to keep the wire bundles away from any sharp edges which may damage wire insulation over time.
Use copper conductors only with an insulati on rating of 90 °C. The option al Fused Combiner (GTFC), if installed, requires the use of copp er conductors only with a maximum insulation rating of 75 °C.
If the installation of the GT100 is to be outdoors, all interconnect conduit and fittings must be NEMA 3R rated as required by the NEC.
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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 Xantrex website:
http://www.xantrex.com/support/gtsizing/index.asp
Environmental Requirements
The following environmental conditions must be established and maintained to ensure the safe and efficient operation and servicing of the GT100. Adequate space must be provided around the unit for ventilation and access during servicing. If locating the unit indoors, ambient air temperature cannot exceed the maximum temperature for which the unit is rated. See Table A-1, “Environmental Specifications” on page A–2.
• Maintain a minimum clearance of 800 mm (31.5 in) in front and 305 mm (12 in) above of the GT100 Enclosure, plus local safety requirements for maintenance and serviceability. The GT100 has a zero (0 mm) clearance requirement at the rear and sides of the enclosure. Figure 2-3, “Conduit Entries Above Ground, Multiple Views” on page 2–7.
• External cabling interfacing with the G T10 0 may enter from either the bottom, lower sides, or lower rear of the enclosure. The GT100 may be placed over a foundation hole which holds the cables, or placed on top of a hollow platform which allows access to the bottom of the GT100.
• If the GT100 is to be installed indoors and external air is used for ventilation, the required liter per minute (L/M) rate must be no less than 37,500 L/M (1150 CFM). This assumes the temperature inside the building is allowed to rise 10 °C (18 °F) above the outside temperature. Therefore, the maximum allowable outside ambient temperature is 50 °C (50 °C minus 10 °C equals 40 °C Maximum Ambient Temperature) or 122 °F (122 °F minus 18 °F equals 104 °F Maximum Ambient Temperature). Additionally for indoor installations, the GT100 enclosure has provisions for an exhaust air duct to be attached, by means of a 355 x 200 mm (14 x 8 in) opening at the top of the enclosure. The GT100 enclosure rain hood must be removed in order to access the exhaust openings. If air conditioning is planned the heat load of the GT100 is 13,600 BTU/Hour at full load.
PV Planning
153379 2–3
Page 46
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 GT100 Enclosure to ensure compliance with FCC Part 15, Class A. This is to be the single point earth ground for the inverter system. The single point connection to the earth grounding electrode for the inverter system is to be made at the AC ground bus bar (TB2).
System Neutral Requirements
The GT100 is designed to be installed as a four-wire system. As required by the UL 1741 listing, a neutral conductor from the utility-interconnect must be terminated at TB1-N within the AC Interface to ensure that the AC voltage sensing circuit can perform an individual phase voltage (line-to-neutral) measurement. The function of the neutral connection is to provide a point of reference for measurement purposes that is essentially at ground potential. No power will flow through the neutral conductor.
Inverter Isolation Transformer
The GT100 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. The GT100 is a balanced, three-phase, current­sourcing inverter and only operates with the presence of a stable utility voltage. The transformer is supplied with a neutral connection on both the Primary and Secondary windings. Connection of these neutral terminals will affect the operation of the GT100 and must be left floating or disconnected. Single-phase, grounded loads which may be present between the transformer and utility, will maintain their existing ground reference at the utility distribution transformer.
CAUTION: Equipment Damage
If the Isolation Transformer neutral (H0 and X0) terminals are tied to ground, they may cause irreparable damage to the GT100. Check local regulations for their requirements regarding the connection of these neutrals.
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Page 47
Electrical Diagrams
Since installations vary widely, a sample electrical diagram of the GT100 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.
Electrical Diagrams
A
AC GRID
B
3 PHASE 60HZ
C
N
GND
Figure 2-1
TB1
A
B
C
N
TB2
SINGLE POINT
TO
EARTH GROUND
CB1
BOT
TOP
4
3
6
5
8
7
2
1
GT100 Electrical Diagram
FILTER
LF1
EMI
L1
L2
L3
K1
AC CONTACTOR
INRUSH LIMIT CCU2
T1
100KVA
H1
X1
H2
X2
H3
X3
H0
SH
A
B
C
POWER MATRIX
K2
A2
A1
F4
S1
1
536
2
4
TB3
TB4
R1
TB5
PV GND
153379 2–5
Page 48
Planning
Conduit Entry
For a typical G T100 installation, the recommended cable entry is from beneath the enclosure. Figure 2-2 below 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. Figure 2-3 on page 2–7 shows the maximum allowable areas (shaded) and locatio ns in which electrical conduits may penetrate the enclosure of the GT100.
Figure 2-2
57 mm
(2.23in)
414 mm
(16.31 in)
127 mm
(5.00in)
282 mm (11.11in)
877 mm
(34.54 in)
Conduit Entries Beneath Enclosure, Bottom View
282 mm (11.11in)
57 mm
(2.23in)
427 mm
(16.81 in)
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Page 49
Note: The shaded area shown below in Figure 2-3 identifying
the DC Interface conduit side entry is valid only when the optional GTFC Fused Combiner assemblies are not installed.
AC Interface Conduit Entry 304 × 406 mm (12 × 16 in)
DC Interface Conduit Entry 457 × 406 mm (18 × 16 in)
AC Interface conduit entry points (shaded) as seen in three different views of the same side.
DC Interface conduit entry points (shaded) as seen in three different views of the same side.
Conduit Entry
Figure 2-3
Conduit Entries Above Ground, Multiple Views
153379 2–7
Page 50
Planning
Anchoring the GT100
The GT100 must be anchored to a level concrete floor or pad in accordance with ASCE 7 -05. The concrete floor or pad, upon which the GT100 is anchored, must be structurally designed to meet any local, state, or national requirements for weight, seismic, and wind sheer if applicable.
Four 19 mm (0.75 in) holes are provided in the feet of the Enclosure for anchoring to the floor or pad. The floor or pad may be pre-drilled to accept ACI 355.2 approved masonry anchors or have pre-installed anchoring bolts. Alternatively, the GT100 can be installed or placed into position, and drilled afterwards for anchoring the enclosure.
Figure 2-4 below depicts the layout pattern of the anchoring holes for the GT100 inverter assembly.
Figure 2-4
1518 mm (59.75 in)
457 mm
4X Ø 19 mm
(0.75 in)
(18.00 in)
Main Inverter Anchor Bolt P a ttern, Bottom View
530 mm
(20.88 in)
89 mm
(3.50 in)
74 mm (2.93 in)
76 mm
(3.00 in)
305 mm
(12.00 in)
381 mm
(15.00 in)
305 mm
(12.00 in)
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3
Installation
Chapter 3, “Installation” describes the procedures needed to install the GT100 Grid-Tied Photovoltaic Inverter. This section includes unpacking and moving instructions, mounting instructions, and cabling instructions.
Page 52
Installation
Unloading
Moving the GT100
WARNING: Heavy Equipment
The GT100 weighs approximately 1361 kg (3000 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.
To move the GT100, use a forklift that has a sufficient lift capacity and has a 66 cm fork span or a crane with a minimum lift capacity of 2000 kg.
WARNING: Equipment is heavy
If lifted incorrectly, the GT100 could overbalance and cause personal injury.
CAUTION: Equipment Damage
c
To move the GT100, use a forklift that has a sufficient lift capacity and has a 66 cm fork span.
To move the GT100 by forklift:
1. Place the forks of the forklift below the shipping pallet at the points specified.
2. Pay attention to the balance point (center of gravity) of the
3. Lift the Enclosure from beneath the shipping pallet.
Unpacking the GT100
To unpack the GT100:
1. Remove the plastic wrapping material surrounding the
2. Remove and save the front and rear enclosure skirts.
3. Remove the GT100 anchor hardware that attaches to the shipping pallet.
GT100.
GT100.
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Page 53
Removing the Pallet and Moving the GT100
CAUTION: Equipment Damage
c
T o move the GT100, use a forklift that has a sufficient lift capacity and a 66 cm fork span.
Use Figure 3-1 to locate the balance point or center of gravity ( symbol).
Unloading
Center of Gravity
Moving with a Forklift
Figure 3-1
609mm (24")
850mm (33.5")
Center of Gravity
355mm (14")
Side viewFront view
To move the GT100 using a forklift:
1. Place the forks of the forklift below the unit at the points specified in Figure 3-2 on page 3–4.
2. Lift the GT100 from beneath. Be sure to use a forklift with a 66 cm fork span.
3. Remove the shipping pallet from beneath the unit.
4. Once the shipping pallet is removed from the unit, use the same lifting locations to lift the unit into the place where it may be permanently located.
153379 3–3
Page 54
Installation
66 cm fork span
Moving with a Sling
Figure 3-2
Forklift Lifting Locations - Underneath Unit
To move the GT100 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 GT100 from above.
3. Remove the shipping pallet from beneath the unit.
4. Once the shipping pallet is removed from the unit, use the same lifting locations to lift the unit into the place where it may be permanently located.
2
1
Figure 3-3
3–4 153379
Moving with a Sling
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Page 55
Removing the Air Intake Duct
The Air Intake Duct may be removed from the rear of the GT100 enclosure if it is necessary to move the inverter through a standard 36-inch door opening and into location.
To remove the GT100 Air Intake Duct:
1. Remove and save the 8 mm nuts (11 total) that attach the Air Intake Duct to the rear of the GT100 enclosure.
2. Carefully remove the Air Intake Duct.
3. Once the GT100 is moved and installed, replace the Air Intake Duct, and tighten the 8 mm nuts (11 total).
Unloading
Air Intake Duct
8 mm nuts (11 total)
Figure 3-4
Important:
of the components, conduit penetration locations, conductor and conduit sizing, and method for anchoring the unit. Ensure adequate space is provided for clearance for ventilation and serviceability . Review Chapter 2, “Planning” if necessary before proceeding.
153379 3–5
Removing the Air Intake Duct
Before proceeding with the installation, determine the location and layout
Page 56
Installation
Removing the Rainhood
For indoor installations, the GT100 enclosure has provisions for an exhaust air duct to be attached, by means of a 355 × 200 mm (14 × 8 in) op ening at the top o f the enclosure. The GT100 enclosure rainhood must be removed in order to access the exhaust opening.
To remove the G T10 0 Rainho od:
1. Remove the 8 mm nuts (8 total) that attach the rainhood to the top of the
2. Carefully remove the rainhood.
GT100 enclosure.
8 mm nuts (8 total)
Figure 3-5
355 × 200 mm (14 × 8 in) opening
Removing the Rainhood
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Page 57
Mounting and Anchoring the Units
To mo unt and anchor the GT100:
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.
Note: Alternatively, the GT100 can be installed or placed into
position, and drilled afterwards for anchoring the enclosure. See Figure 2-4 on page 2–8.
2. Lift the GT100 from beneath with a forklift or above with a sling as shown in Figure 3-2 on page 3–4 and Figure 3-3 on page 3–4. Mov e the E nclosure into place.
3. Secure the Enclosure base to the floor with the appropriate anchoring hardware.
4. Install the skirts to the base of the GT100 using the M5 hardware provided.
Note: The solid skirt is to be replaced at the rear of the GT 100
enclosure base, and the perforated skirt is to be replaced at the front of the GT100 enclosure base.
Mounting and Anchoring the Units
153379 3–7
Page 58
Installation
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
Figure 3-6
AC Interface Access Door
DC Disconnect Switch 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. Using the key supplied with the unit, turn clockwise to lock.
To Open Access Door:
1. Confirm that the DC Disconnect Switch 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.
3. Pull open from the left side.
To Close Access Door:
1. Confirm that the DC Disconnect Switch handle is placed in the OFF (Open) position prior to closing the door.
2. Close the door.
3. Using the key supplied with the unit, turn clockwise to lock.
Figure 3-7
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DC Interface Access Door
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Page 59
Wiring - General
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 GT100, both shall be in accordance with the National Electrical Code ANSI/NFPA 70, as well as all state and local code requirements..
WARNING: Shock Hazard
The GT100 Enclosure contains exposed high-voltage conductors. The Enclosure doors should remain closed with the latches tightened, except during installation, maintenance or testing. These servicing instructions are for use by qualified personnel who 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. To reduce the risk of electric shock, do not perform any servicing other than that specified in the installation instructions unless you are qualified to do so. Do not open the cabinet doors if extreme moisture is present.
WARNING: Lethal Voltage
In order to remove all sources of voltage from the GT100, the incoming power must be de­energized at the source. This may be done at the main utility circuit breaker and by opening the AC Disconnect and the DC Disconnect Switches on the GT100. Review the system configuration to determine all of the possible sources of energy. In addition, allow 5 minutes for the DC bus capacitors, located within the cabinet, to discharge after removing power.
Wiring - General
CAUTION: AC Phase Convention
When connecting external AC wires to the GT100, positive phasing sequence should be maintained throughout the installation process. Refer to the system schematics in the unit enclosure for proper phasing convention. The GT100 includes the ability to auto-sense and correct for a mis-phased connection at the AC Interface terminals. In the event the power conductors from the utility are not phased correctly at the AC Interface terminals, the GT100 will sense the discrepancy and automatically correct for a clockwise (A-B-C) phase rotation.
Important:
damage wire insulation over time. Consult the NEC ANSI/NFPA 70 Code Book to ensure code compliance.
The model GT100 has a three-phase, four-wire output. Conductor size should have been pre-determined when the conduit was installed.
Prepare the appropriate length conductors for each connection.
153379 3–9
Take care to keep the wire bundles away from any sharp edges which may
Page 60
Installation
Overcurrent Protection
Unless provided as part of the Xantrex supplied equipment; the AC overcurrent protection for the Utility Interconnect (Grid-tie) must be provided by the installer as part of the GT100 installation.
CAUTION: Equipment Damage
In accordance with the NEC, ANSI/NFP A 70 (Ninth Edition) the following branch-circuit overcurrent protection must be provided:
• GT100-208-NG and GT100-208-PG — 400A maximum
• GT100-480-NG and GT100-480-PG — 200A maximum
Conductor Termination
The GT100 has terminals and bus bars for making all wiring connections required for the installation. All terminals and bus bars used for making AC and DC connections require the use of copper conductors only with an insulation rating of 90 °C. The optional Fused Combiner (GTFC), if installed, requires the use of copper conductors only with a maximum insulation rating of 75 °C. For bolt size, and torque values for the AC terminals, see Table A-5 on page A–5. For bolt size, and torque values for the DC terminals, see Table A-6 and Table A-7 on page A–
5. 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..
AC Interface The AC line terminals in the AC Interface (TB1-A, TB1-B, TB1-C, and TB1-N)
have one bolt per bus and a maximum of two cables per bolt. These terminals require the use of crimp-on type ring-terminals or compression lugs. See Figure 3-9 on page 3–13 for the location of these terminals.
The system/chassis ground terminal in the AC Interface (TB2-Ground) is six bolts per pole and a maximum of two cables per bolt. These terminals require the use of crimp-on type ring terminals or compression-type lugs. See Figure 3-9 on page 3–13 for the location of this terminal.
The Auxiliary Control Interface terminals are one wire per terminal (TB7-1, TB7­2, TB7-3, and TB7-4). These terminals require the use of crimp-on type ring­terminals or compression lugs.
See Figure 3-10 on page 3–13 for the location of these terminals.
DC Interface The DC terminals in the DC Interface [TB3, TB4, and TB5 (PV GND)] have six
bolts per pole and a maximum of two cables per bolt. These terminals require the use of crimp-on type ring-terminals or compression lugs. The optional Fused Combiner (GTFC) assemblies, if insta lled, include one box style connector per fuse for cable termination. See Figure 3-11 on page 3–14 for the location of these terminals.
Important:
pass through the same knockout and conduit fittings, thus allowing any inductive currents to cancel.
3–10 153379
Keep these cables together as much as possible, and ensure that all cables
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Page 61
Wiring - General
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 GT100 Enclosure to ensure compliance with FCC Part 15, Class A. This is to be the single point earth ground for the inverter system. The single point connection to the earth grounding electrode for the inverter system is to be made at the AC ground bus bar (TB2).
Ground Bar (TB2) to be used for the Single Point Ground.
Figure 3-8
Single-point Ground; Ground Bar
Chassis Ground The chassis ground is a copper bus bar in the AC Interface and has six bolts for
terminating the ground. The ground conductor size depends on the size of the main circuit breaker. NEC Table 250.122 (Ninth Edition) requires that the ground conductor be at least #3 AWG for a 400 A circuit breaker (GT100-208-NG and GT100-208-PG) and at least #6 A WG for a 200 A circuit breaker (GT100-480-NG and GT100-480-PG).
The equipment ground on the GT100 is marked with
System Neutral
The GT100 is designed to be installed as a four-wire system. As required by the UL 1741 listing, a neutral conductor from the utility-interconnect must be terminated at TB1-N within the AC Interface to ensure that the AC voltage sensing circuit can perform an individual phase voltage (line-to-neutral) measurement. The function of the neutral connection is to provide a point of reference for measurement purposes that is essentially at ground potential. No power will flow through the neutral conductor.
153379 3–11
Page 62
Installation
Wiring - Specific
This section provides information for connecting the AC and DC conductors and the ground conductors. Table A-5, Table A-6, and Table A-7 on page A–5 show the specifications of the AC and DC 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),
3. T erminations for the neutral (TB1-N) and ground (TB2) conducto rs within the
4. Close the door to the AC Interface.
and TB1-C (C phase) terminals using the M10 hardware. Cables to these terminals must use a crimp-on type ring terminal or compression-type lug. See Figure 3-9 for the location of these terminals.
AC Interface at the groundbar are made with 10 mm hardware. Cables to these terminals must use a crimp-on type ring terminal or compression-type lug. See Figure 3-8 on page 3–1 1 and Figure 3-9 on page 3–13 for the location of these terminals.
To connect the Auxiliary Control Interface within the AC Interface:
1. Open the door to the AC Interface and remove the factory-installed jumpers.
2. Route the Auxiliary Control Interface conductors through the conduit from the source to the AC Interface.
3. Connect the ACAuxiliary Control Interface conductors at the TB7 terminal block. These conductors must use crimp-on type ring terminals or compression-type lugs. See Figure 3-10 for the location of these terminals.
4. Close the door to the AC Interface.
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Page 63
Wiring - Specific
TB1-N Phase terminal
TB1-A Phase terminal TB1-C Phase terminal
Figure 3-9
AC Terminal Connections from the Utility
TB1-B Phase terminal
TB2 Ground Bar
Figure 3-10
153379 3–13
Auxiliary Control Interface Terminal Connections
Page 64
Installation
PV Array Connections
To make the connections from the PV Array/combiner to DC Interface:
1. Open the door to the DC Interface.
2. Route the PV Array cables conductors POSitive (PV+) and NEGative (PV-)
3. The DC power conductor terminations are made at either the optional Fused
4. Terminations for the POSitive, NEGative, Ground conductors within the DC
5. Close the door to the DC Interface.
through the conduit to the DC Interface, entering on the underside.
Combiner (GTFC) or TB3, as well as TB4 and TB5 (PV GND). See Figure 3­11 for the location of the terminals and Table 3-1 for DC Terminal polarity for each GT100 model.
Interface are made using the 10 mm hardware.
TB4
TB3
TB5 (PV GND)
Figure 3-11 Table 3-1
Model TB3 or GTFC TB4 TB5
GT100-208-NG PV+ PV– PV GND GT100-208-PG PV– PV+ PV GND GT100-480-NG PV+ PV– PV GND GT100-480-PG PV– PV+ PV GND
PV Array Cable Routing and Terminations
DC Terminal Polarity
TB4
GTFC
TB5 (PV GND)
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Page 65
Remote Communications
The GT100 has the ability to provide remote communications via optional modems for system monitoring or data logging through a personal computer using the Xantrex GT View 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. The GUI also provides additional data logging and tracking features which are not available through the UFCU. If multiple inverters are networked together, the soft ware is capable of tracking up to 50 inverters on the same network.
The PC can be connected to the unit remotely. Before installing the GUI software, it will be necessary to determine and establish the proper communication from a service provider.
PC Connection Methods
A personal computer can be connected by remote connection - through the optional modem communication kit to be installed in the AC Interface.
Remote Communications
Figure 3-12
Modem Kit as Installed in the AC Interface
Modbus
A user selectable RS485/Modbus connection is also available for remote plant monitoring. The CCU2 Controller board within the GT100 may be configured for RS485 serial communication using the Modbus protocol.
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Page 66
3–16
Page 67
4
Verification
Chapter 4, “Verification” provides a checklist to ensure the installation of the GT100 Grid-Tied Photovoltaic Inverter is correct and complete.
Page 68
Verification
Verification Procedure Summary
WARNING: Electrocution Hazard
This chapter describes specific steps to ensure the installation of the GT100 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.
WARNING: Shock Hazard
The GT 100 Enclosure contains exposed high-voltage conductors. The Enclosure doors should remain closed with the latches tightened, except during installation, maintenance or testing. To reduce the risk of electric shock, do not perform any servicing other than that specified in the installation instructions unless you are qualified to do so.
WARNING: Lethal Voltage
In order to remove all sources of voltage from the GT100, the incoming power must be de­energized at the source. This may be done at the utility main circuit breaker and by opening the AC Disconnect and the DC Disconnect switches on the GT100. Review the system configuration to determine all of the possible sources of energy . In addition, allow five minutes for the DC bus capacitors, located within the cabinet, to discharge after removing power.
The following procedures are intended to verify correct installation and proper wiring of the GT100. Prior to performing the following verification steps on the GT100, review all safety requirements and procedures outlined in this manual and on any cautionary markings on the components within the system.
Inspect the following items prior to completion of the installation:
1. Visually inspect all the mechanical connections. This would include both electrical conduit fittings, as well as Enclosure anchoring and seismic bracing if required.
2. Visually inspect the electrical connections and verify proper tightness of all terminations.
3. Visually inspect the Isolation Transformer Wye/Wye connections and ensure the transformer neutral connection is left disconnected.
4. Perform corrective actions if required.
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Page 69
Visual Inspection of Mechanical Connections
Visual Inspection of Mechanical Connections
To perform a visual inspection of the GT100 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. Verify all wire conduit fittings and connections are properly tightened. ❐
Visual Inspection of Electrical Connections
To pe rform a visual inspection of the GT100 electrical connections:
1. Ensure that the AC Disconnect and DC disconnect switches, as well as any utility interconnect circuit breakers or main disconnect switches, are opened.
2. Ensure all conductors and wiring connections interfacing with the GT100 are tightened to the correct torque value. For specific torque values, see Table A-5 on page A–5 and Table A-6 on page A–5.
❐
❐
❐
❐
❐
3. Verify the AC power conductors terminated at TB1-A, TB1-B, TB1-C, and TB1-N within the AC Interface are terminated correctly and properly sequenced.
4. Verify DC power conductors terminated at either the optional Fused Combiner (GTFC) or TB3, as well as TB4 and TB5 within the DC Interface are terminated correctly and are properly polarized.
❐
❐
Corrective Action
Perform after initial inspection (if required):
1. Correct any necessary repairs pertaining to the previous inspection steps.
2. Replace the latches and close the doors of the Inverter Enclosure.
3. Ensure that the AC Disconnect and DC Disconnect Switches, as well as any utility interconnect circuit breaker or main disconnect circuit breaker, are left open.
153379 4–3
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4–4
Page 71
A
Specifications
Appendix A provides the environmental and electrical specifications for the GT100 Grid-Tied Photovoltaic Inverter.
Page 72
Specifications
System Specifications
The GT100 has been designed for photovoltaic power systems, which operate within the following specifications.
CAUTION: Equipment Damage
Operation of the G T100 in a manner other than specified in this manual may cause damage to the GT100 and other system components and will void the terms of the warranty.
Environmental Specifications
Table A-1
Specification Value
Dimensions 1861.8 mm H x 1702.0 mm W x 1171.0 mm D
Weight 1361 kg (3000 lbs) Allowable Ambient Temperature
Operating
Storage Relative Humidity to 95%, non-condensing Elevation 2000 m (6600 ft) Protection Class NEMA 3R Clearance (ventilation and
serviceability)
Top
Front
Sides
Rear
Environmental Specifications
(73.3 in. H x 67.0 in. W x 46.1 in. D)
-15 °C to 50 °C Maximum (5 °F to 122 °F)
-40 °C to 50 °C Maximum (-40 °F to 122 °F)
305 mm (12 in) 800 mm (31.5 in) (door clearance) plus local safety standards 0 mm (0 in) 0 mm (0 in)
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Page 73
Electrical Specifications
Table A-2 provides the AC and DC specifications for the GT100.
System Specifications
Table A-2
Specification
Nominal AC Input Voltage (+10% to -12% acceptable range)
Maximum Continuous AC Output Current 121 A Nominal AC Input Frequency
(+0.5 to -0.7 Hz acceptable range) Line Power Factor >0.99 >0.99 Output Power 100 kW 100 kW Sell Power Range 1 kW to 100 kW 1 kW to 100 kW Peak Power Tracking Window 300 to 480 Vdc 300 to 480 Vdc Maximum Open Circuit Voltage 600 Vdc 600 Vdc Nominal DC Voltage 345 Vdc 345 Vdc Maximum DC Current 347 A 347 A DC Current Ripple < 2% at rated power < 2% at rated power Maximum Array Short Circuit Current 460 A 460 A DC Back-feed Current 0 A 0 A AC Current Distortion < 5% THD at rated
Efficiency > 96.0% > 95.0% Standby and Night-time Tare Loss < 100 W < 100 W
Electrical Specifications
GT100-480-NG and GT100-480-PG
480 Vac (423 to 528 Vac)
rms
60 Hz (57.0 to 60.5 Hz)
power
GT100-208-NG and GT100-208-PG
208 Vac (184 to 228 Vac)
278 A
rms
60 Hz (57.0 to 60.5 Hz)
< 5% THD at rated power
Regulatory Specifications
Table A-3 provides the regulatory specifications for the GT100.
Table A-3
Standard Regulation Met
General Standards UL 1741 Rev 2005
Emitted Interference IEEE Std C37.90.2-1995
153379 A–3
Regulatory Specifications
UL 508C IEEE 1547 CSA 107.1-01
FCC Class A
Page 74
Specifications
Over Voltage, Under Voltage and Frequency Ranges
Table A-4 provides the over voltage, under voltage, over-frequency, and under­frequency detection limits for the GT100. These detection limits have been factory tested and deemed to be in compliance with UL 1741 Rev 2005 and IEEE 1547 requirements for utility interaction.
Table A-4
V ac Condition (% of Nominal)
Vac < 50% (Fast Under-voltage)
50% <=Vac < 88% (Under-voltage)
88% < Vac <= 110% (Nominal)
110% < Vac < 120% (Over-voltage)
120% >= Vac (Fast Over-voltage)
f < rated -3.0 (Fast Under Frequency)
f < rated -0.7 (Under Frequency)
f > rated +0.5 (Over Frequency)
a
Adjustable, password-protected.
Over/Under Voltage and Over/Under Frequency Ranges
GT100-480-NG and GT100-480-PG Vol tage Range
Vac < 240 Vac < 104 10 cycles
240 <= Vac < 423ª 104 <= Vac < 184ª 2 seconds
423 < Vac <= 528 184 < Vac <= 228 normal
528 < Vac < 576ª 228 < Vac < 249ª 1 second
576 >= Vac 249 >= Vac 10 cycles
f < 57.0 f < 57.0 10 cycles
f < 59.3ª f < 59.3ª 10 cyclesª
f > 60.5 f > 60.5 10 cycles
GT100-208-NG and GT100-208-PG Voltage Range Trip Time
operation
A–4 153379
This manual for use by qualified installers only
Page 75
Bolt Sizing and Torque Requirements
Table A-5 provides acceptable bolt sizes, and torque values for AC terminal connections.
System Specifications
Table A-5
AC Terminal Connections
PE (Enclosure Ground)
TB1-A, TB1-B, TB1-C and TB1-N
AC Terminal Bolt Size and Torque Values
Max. # of Conductors per Terminal
21 / M1075Nm
1 1 / .41 Thru
Bolt (Hardware) or Hole Size
M10
Torque Requirements
(55 lb ft) 75 Nm
(55 lb ft)
Table A-6 and Table A-7 provide acceptable bolt sizes, conductor range, and torque values to be connected to the GT100 DC terminal connections.
Table A-6
DC Terminal Connections
TB3, TB4, and TB5 6 6 / .41 Thru
Table A-7
Fused Combiner Terminal Connections
GT FC 100A 2/0 - #12 Slot Screw 5.6 Nm
GTFC 150A 350kcmil - #6 8mm Hex
GTFC 200A 350kcmil - #6 8mm Hex
DC Terminal Bolt Size and Torque Values
Max. # of Conductors per Terminal
Bolt (Hardware) Size
M10
DC Terminal Conductor Range and Torque Values
Conductor Range Hardware Type Torque
Screw
Screw
Torque Requirements
75 Nm (55 lb ft)
Requirements
(4.2 lb ft)
42.4 Nm (31.25 lb ft)
42.4 Nm (31.25 lb ft)
153379 A–5
Page 76
Specifications
Table A-8 provides acceptable screw sizes, and torque values to be connected to the GT100 Auxiliary Control Interface terminal connections.
Dimensions
Table A-8
Aux Control Connections
TB7-1,2 Remote Emergency Stop
TB7-3,4 Aux Enable/ Disable
Auxiliary Control Interface Screw Size and Torque Values
Max. # of Conductors per Terminal
1 6-32 × 0.5, Pan
1 6-32 × 0.5, Pan
Screw (Hardware) Size
Hd Phil (provided)
Hd Phil (provided)
Torque Requirements Signal Type
1.35 Nm (12 lb in)
1.35 Nm (12 lb in)
N.C. Contact @15Vdc, 10mA
N.C. Contact @15Vdc, 10mA
1861.8 mm (73.3 in)
1702.0 mm (67.0 in)
Figure A-1
A–6 153379
GT100 Dimensions
This manual for use by qualified installers only
1171.0 mm (46.1 in)
Page 77
Page 78
Xantrex Technology Inc.
1 800 670 0707 Tel toll free NA 1 408 987 6030 Tel direct
1 800 994 7828 Fax toll free NA customerservice@xantrex.com www.xantrex.com
153379 Printed in USA.
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