Xantrex GT100 Series Technical manual

Xantrex™ GT100
Grid-TiedPhotovoltaic
Inverter
Planning and Installation
Manual

This manual for use by qualified installers only
Xantrex™ GT100 Grid-Tied
Photovoltaic Inverter
Planning and Installation Manual

This manual for use by qualified installers only
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 International. All
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.
THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’SRISK; 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: [phone] (toll free North America)
1 408 987 6030 (direct)
Fax: [phone] (toll free North America)
Email: [email protected]
Web: www.xantrex.com

153379 iii
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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.

About This Manual
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Conventions Used
The following conventions are used in this guide.
GT100 Models
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).
•ThemodelGT100-208-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.
•ThemodelGT100-208-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).
•ThemodelGT100-480-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.
•ThemodelGT100-480-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.
WARNING
Warnings 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.
Important: These notes describe things which are important for you to know, but not as
serious as a caution or warning.

About This Manual
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This manual for use by qualified installers only
Abbreviations and Acronyms
Related Information
You can find more information about Xantrex Technology Inc. as well as its
products and services at www.xantrex.com.
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
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 de-
energized 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.

Safety
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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 GT100 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 GT100 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.