Xantrex Technology PV225S-480-P User Manual

PV225S 225 kW
Grid-Tied
Photovoltaic
Inverter

PV225S-480-P

Planning and Installation Manual

PV225S 225 kW Grid-Tied
Photovoltaic Inverter

Planning and Installation Manual

About Xantrex

Xantrex Technology Inc. is a world-leading supplier of advanced power electronics and controls with products from
50 watt mobile units to 1.5 MW utility-scale systems for wind, solar, batteries, fuel cells, microturbines, and backup
power applications in both grid-connec ted and stand-alone syst em s . Xantrex products include inverters, battery
chargers, programmable power supplies, and variable speed drives that convert, supply, control, clean, and distribute
electri cal powe r.

Trademarks

PV225S 225 kW Grid-Tied Photovoltaic Inverter is a trademark of Xantr ex International. Xantrex is a registered
trademark of Xantrex International.

Other trademarks, registered trademarks, and product names ar e the property of their respe ctive owners and are used
herein for identi fication purposes onl y.

Notice of Copyright

PV225S 225 kW Grid-Tied Photovoltaic Inverter Planning and Installation Manual© August 2005 Xantrex
International. All rights reserv ed.

Disclaimer

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 INFORMAT ION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSS OR DAMAGE, WHETHER 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’S RISK.

Date and Revision

August 2005 Revision B

Part Number

152606

Contact Information

Telephone: [phone] (toll free North America )

1 360 925 5097 (direct)

Fax: [phone] (toll free North America )

1 360 925 5143 (direct)
Email: [e-mail]
Web: www.xantrex.com

About This Manual

Purpose

The purpose of this Planning and Inst allation Manual is to provide explanations
and procedures for planning a nd installing the PV225S 225 kW Grid-Tie d
Photovoltaic Inverter.

Scope

The Manual provides safety guidelines, detaile d planning and setup information,
and procedures for installing the inverter.

Audience

The Manual is intended for use by anyone who plans to construct or install a
system involving the PV225S 225 kW Grid-Tied Photovoltaic Inverter. Installers
must meet all loca l and st ate code requ irements for licensing a nd training for the
installati on of Electrical Power Systems with AC and DC voltage to 600 volts.

Organization

This Manual is organized into four chapters:
Chapter 1, “Introduction” provides information about the features and functions

of the PV225S 225 kW Grid-Tied Phot ovoltaic Inverter.
Chapter 2, “Planning” provides information to help plan the installation of the

PV225S 225 kW Grid-Tied Phot ovoltaic Inverter.
Chapter 3, “Installation” describes the procedures needed to install the PV225S

225 kW Grid-Tied Phot ovoltaic 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
PV225S is correct and complete.

152606 iii

About This Manual

Conventions Used

The following conventions are used in this guide.

WARNING

Warnings identify conditions or pract ices that could result in pe rsonal injury or loss of life.

CAUTION

Cautions ide ntify conditions or practices that could result in damage to th e unit or other
equipment.

Important:

serious as a caution or warning.

This Manual contains information for the PV225S-480-P 225 kW Grid-Tied
Photovoltaic I nverter. Throughout the manual it will be ref erred to a s the P V225S,
unless otherwise noted.

These notes descri be thi ngs whic h are im portant for you to kno w , but not as

iv 152606

Abbreviations and Acronyms

ANSI American National S tandards Institut e
CCU2 Converter Control Unit 2
CFM Cubic Feet per Minute
CW Clockwise
DSP Digital Signal Processor
FPGA Field Prog r am ma b le Gate Array
GUI Graphical User Interface
IEEE Institute of Electrical and Electronics Engineers
IGBT Insulated Gate Bipolar Transi stor
IPM Intelligent Power Module
kcmil 1000 circular mils
LAN Local Area Network
LCD Liquid Crysta l Display

About This Manual

NFPA National Fire Protection Association
PBX Private Branch Exchan g e
PSL Phase-Shift Loop
POTS Plain Old Telephone Service
PV Photovoltaic
UFCU Universal Frontpanel Control Unit

Related Information

You can find more information about Xantrex Technology Inc. as well as its
products and services at www.xantrex.com.

152606 v

vi

Important Safety Instructions

SAVE THESE INSTRUCTIONS - DO NOT DISCARD

This manual contains importa nt safety instructions for the PV225S that shal l be
followed during insta llation and maintenance procedures.

WARNING: Shock Hazard

Read and keep this Planning and Installation Ma nual for future reference. Before
installing t he PV225S, read a ll ins truct ions, cauti onary marki ngs, a nd all other ap propriat e
sections of this manual. Failure to adhere to these warnings could result in severe s hock or
possible death. Exercise extreme caution at all times to prevent accidents.

WARNING: Shock Hazard

The PV225S enclosures contain exposed high-voltage conductors. The enclosure doors
should remain cl osed 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 li ce nsing and training for the installation of
Electrical Power Systems with AC and DC voltage to 600 vol ts. To reduce the risk of
electric shock, do not perform any servicing other than that specified in the installation
instructi ons 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 PV225S, the incoming power must be
de-energized at the source. This may be done at the main utility circ uit breaker and by
opening the AC Disconnect and the DC Disconnect Swi tches on the PV225S. Review th e
system configuration to determine all of the possible sources of energy . In addition, allow
5 minutes for the DC bus capacitors, located on the cei ling of the cabinet, to dis charge
after removing power.

152606 vii

Safety

General Safety Precautions

1. When installing the PV225S 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 t o oper ate the PV225S if i t ha s been d rop ped, or recei ved more
than cosmetic damage during transport or shipping. If the PV225S is
damaged, or suspected to be damaged, see the Warranty for this unit in the
PV225S 225 kW Grid- Tied Photovoltaic Inverter Operation and Maintenance
Manual.

3. To reduce the risk of electrical shock, lock-out and tag the PV225S before
attempting any maintena nce, service, or cleaning.

Personal Safety

Follow these instructions to ensure your safety while working with the PV225S.

Safety Equipment

Authorized servic e perso nnel must be equipped with standard safety equipment
including the following:

• Safety glasses

• Ear protection

• Steel-t oed safety boots

• Safety hard hats

• Padlocks and tags

• Appropriate meter to veri fy that the circuits are de-ener gized
(600 Vac and DC rated, minimum)

Check local safety regul ati ons for other requirements.

Wiring Requirements

1. All wiring methods and materials shall be in accordance with the National
Electrical Code ANSI/NFPA 70. When sizing conductors and conduits
interfacing to the PV225S, both shall be in accordance with the National
Electric Code ANSI/NFPA 70, as well as all state and local code
requirements.

2. Use copper conductors only with insulation rated for 90 °C.

3. The PV225S has a three-phase output. It is marked with this symbol:

4. The AC power conductor wiring interfacing with the AC terminals in the
Transformer Enclosure are located at T6-X1, T6-X2, and T6-X3. These
terminals should be tightened to a torque value of 420 in-lbs (47.5 Nm).
Conductors terminate d to these terminals must use a crimp-on type ring

viii 152606

Safety

terminal or compression- type lug. The terminals can accommodate up to two
conductors per phase. See Figure 3-14 on page 3–15 for the location of these
terminals.

5. The AC power conductor wiring interfacing with the AC terminals in the
Main Inverter Enclosure are located at TB5, TB6, and TB7. These terminals
are to be tightened to a torque value of 375 in-lbs (42.4 Nm). The terminals
will accept a conductor size of 350 kcmil and can accommodate up to six
conductors per phase. See Figure 3-15 on page 3–16 for the location of these

terminals.

6. The AC power conductor wiring interfacing with the AC terminals in the
AC Interface Enclosure are located at S1-2T1, S1-4T2, and S1-6T3. These
terminals should be tightened to a torque value of 310 in-lbs (35.0 Nm). See

Figur e 3-16 on page 3–16 for the location of these terminals and the
cautionary note on page 3–18.

7. The AC neutral conductor from the util ity is te rminated in the AC Interface
Enclosur e at the TB 11 terminal . Th is termi n al req u ires the us e of a crim p- o n
type ring terminal or compression-type lug and should be tightened to a
torque value of 228 in-lbs (25.7 Nm). See Figure 3-18 on page 3–18 for the

location of these termin als.

8. The DC power conductor wiring interfacing with the DC terminals at S2-6,
K2-6T3, and TB4 are to be tightened to a torque value of 600 in-lbs
(67.8 Nm). These terminals will accept a conductor size of 600 kcmil a nd can
accommodate up to four conductors per pole at S2-6 and K2-6T3 and up to
two conductors at TB4. Keep these cables together as much as possible and
ensure that all cables pass through the same knockout and conduit fittings,
thus allowing any i nductive currents to canc el. See Figure 3-19 on page 3–19

for the location of these terminals.

9. This product is intended to be installed as part of a permanently grounded
electrical system per the National Electric Code ANSI/NFPA 70. A copper
ground rod must be installed within three feet of the PV225S enclosure. This
is the single point earth ground for the inverter system. The single point
ground for the system is to be made at the AC ground bus bar (TB12) in the
AC Interface En closure. This te rminal requi res the use of a cri mp-on t ype ring
terminal or c ompression-type lug and should be tightened to a torque value of
420 in-lb (47.5 Nm).

10. The equipment grounds on the PV225S are marked with this symbol:

11. AC overcurrent protect ion fo r the utility interconnect (Grid-tie) must be
provided by the installers a s part of the PV225S installation.

CAUTION: Fire Hazard

In accordance wi th the Nationa l Ele ctric al Code , ANSI/NFPA 70, connect onl y to a c ircuit
provided with 400 amperes maximum branch circuit overcurrent protection for the
PV225S.

152606 ix

Safety

Operational Safety Procedures

Never work alone when servicing thi s 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 inadvert ently been left behind.

Lockout and Tag

Safety requirements mandate that this equipment not be servi ced while energi zed.
Power sources for the PV225S must be locked-ou t and tagged prior to servicing.

A padlock and tag should be installed on each energy source prior to
servicing.

WARNING: Shock Hazard

Review the system schematic for the in stallation to v erify that all avail able energy sources
are de-ener gize d. DC bus vol tage may a lso be present . Be su re to wait the full 5 m inutes to
allow th e capacito rs to disch arge comp letely.

The PV225S can be energized from both the AC source and the DC source. To
ensure that the inverte r is de- energized prior to servicing, lockout and tag the
PV225S using the following procedure.

1. Open, lockout, and tag the incomin g power at the utility main circuit breaker.

2. Open, lockout, and tag the AC Disconnect Switch (S1) on the AC Interface
Enclosure. See Figure 1-4 on page 1–9 for the location of the AC Disconnec t
Switch.

3. Open, lockout, and tag the DC Disconnect Switch (S2) on the DC Interface
Enclosure. See Figure 1-4 on page 1–9 for the location of the DC Disconnec t
Switch.

4. 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 loc ations.

a) Inverter Terminals: TB5, TB6 , TB7 (Phase A, B, C)

See Figure 3-15 on page 3–16.

b) Utility Terminals: Botto m of S1-2T1, S1-4T 2, S1 -6T3

See Figure 3-16 on page 3–16.

c) PV Terminals: Bottom of S2-6, K2-6T3, TB4 (PV+, PV-, GND)

See Figure 3-19 on page 3–19.

x 152606

De-Energize/Isolation Procedure

The following procedure should be followed to de-energize the PV225S for
maintenance.

WARNING

The terminals of the DC input may be energize d if the PV arrays are energized. In
additi on , all o w 5 min u tes for all capacit or s w i th in th e main enc lo s u r e to dis c harge after
disconnecting the PV225S from AC and DC sources.

To isolate the PV225S:

Safety

1. Turn the O

2. Open the D C Di sco nne ct Sw itch.

3. Open the A C Di sco nne ct Sw itch.

4. Open the utility connection c ircuit breaker.

5. Install lockout devi ces on the utility connection circu it brea ker and DC
Disconnect Switch.

N/OFF swit c h to the OFF position.

Interconnection Standards Compliance

The PV225S has been tested and listed by Underwriters Laboratories to be in
compliance with UL1741 Static Inverters And Charge Controllers For Use In

Photovoltaic Power Syste ms, as well as IEEE-929-2000 Recommended Practice
For Utility Interfac e of Photovoltaic (PV) Systems.

IEEE-929-2000 provides guida nce regarding equipment and functions necessary
to ensure compatible operation of photovoltaic systems which are connected in
parallel with the elect ric u t ility.

UL1741 is the standard applied by Underwriters Laboratory to the PV225S to
verify it meets the recommendat ions of IEEE-929-2000.

Refer to both documents for detai ls of these recommendations and test
procedures.

152606 xi

xii

Contents

Important Safety Instructions

1

Introduction

Description of the PV225S - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–2
System Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4

Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–4

Over Voltage, Under Voltage and Frequency Ranges - - - - - - - - - - - - - - - - - - - - - - - - - 1–4
System Ground Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
System Neutral Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5
Utility Side Isolation Transformer Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–5

Environmental Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–6

Operator Interface Controls- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7

Main Enclosure Door Interlock Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
On/Off Switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8
AC and DC Disconnect Switches - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9

Communication Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9

System Status and Fault Reporting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10
Data Logging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–10

Communication Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11

Universal Front Panel Contr ol Unit (UFCU) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11
PC Connection Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–12

POTS Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–13
Wireless Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–13
Ethernet LAN Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–14
Direct Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–14

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -vii

2

Planning

Overview of PV225S Installation- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–2
PV Planning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3
Ventilation and Serviceability Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–3
Ground Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4
System Neutral Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4
Communication Requirements- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–4
Utility Side Is ola tion Tr ans fo rm er Req ui rem en ts - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 – 5
Electrical Diagrams and Schematics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–5
Layout Options - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–6
Conduit Penetrati on- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–8
Conductor and Conduit Sizing- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–11
Anchoring the PV225S- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13

152606 xiii

Contents

3

Installation

Equipment Required - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2
Unloading - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–2

Moving the PV225S - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Unpacking the PV225S - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3

Removing the Pallet and Moving the PV225S - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Mounting and Anchoring the Units - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
Opening or Closing Access Doors- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6
Conduit Installat ion - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
Wiring - General - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–10

Overcurrent Protec tion - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–11

Conductor Termination - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–11

Wire Gauge and Torque Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–12

Grounding - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–12

System Neutral Requirement s - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–13

Utility Side Isolat ion Transformer Requirements - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–13
Wiring - Specific - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–14

AC Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–14

PV Array Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–19
PC Communications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–20

PC Connection Methods - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–20

Establishing a POTS Connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–21
Establishing Wireless Connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–22
Establishing an Ethernet LAN Connect ion - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–22
Direct Connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–23

4

Verification

Verification Procedure Summary - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–2
Visual Inspection of Mechanical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3
Visual Inspection of Electrical Connections - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–3
Visual Inspection, Isolation Transformer Wye:Wye - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–4
Corrective Action - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4–4

A

Schematics

Index

xiv 152606

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - IX–1

Figures

Figure 1-1 Dimensions (Not to scale) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–3
Figure 1-2 PV225S Operator Interface Components- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–7
Figure 1-3 On/Off Switch (S3) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–8
Figure 1-4 AC and DC Disconnect Switches (S1 and S2) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–9
Figure 1-5 LCD Display and UFCU Location- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–11
Figure 1-6 PC Connections in the Communications Enclosure- - - - - - - - - - - - - - - - - - - - - - - - - 1–12
Figure 1-7 POTS Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–13
Figure 1-8 Wireless Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–13
Figure 1-9 Ethernet LAN Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–14
Figure 1-10 Direct Access - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1–14
Figure 2-1 PV225S Layout Option A- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–6
Figure 2-2 PV225S Layout Option B- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–7
Figure 2-3 Conduit Entry Figure Reference - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–8
Figure 2-4 Inductor Enclosure Conduit Entry, Left Side - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–9
Figure 2-5 Transformer Enclosure Conduit Entry, Right Side - - - - - - - - - - - - - - - - - - - - - - - - - - 2–9
Figure 2-6 AC Interface Enclosure Conduit Entry, Left Side- - - - - - - - - - - - - - - - - - - - - - - - - - 2–10
Figure 2-7 DC Interface Enclosure, Bottom Side- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2–10
Figure 2-8 Communications Enclosure Conduit Entry, Bottom Side- - - - - - - - - - - - - - - - - - - - - 2–10
Figure 2-9 Main Inverter Anchor Bolt Pattern (Not to scale) - - - - - - - - - - - - - - - - - - - - - - - - - - 2–13
Figure 2-10 AC Interface/Transformer Anchor Bolt Pattern (Not to Scale) - - - - - - - - - - - - - - - - - 2–14
Figure 3-1 Moving the crated PV225S- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–3
Figure 3-2 Forklift Lifting Locations - Underneath Unit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–4
Figure 3-3 Mounting Hole Locations- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–5
Figure 3-4 Inverter Enclosure Access Doors - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–6
Figure 3-5 AC Interface Access Door - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–7
Figure 3-6 DC Interface Access Door - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–7
Figure 3-7 Transformer Access Panels- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8
Figure 3-8 Inductor Access Panels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–8
Figure 3-9 Conduit Installation- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–9
Figure 3-10 Single-point Ground (TB12) Ground Bar - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–12
Figure 3-11 Chassis Ground Bar (TB1) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–13
Figure 3-12 Route AC Cables through the Conduit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–14
Figure 3-13 Tie-wraps on the AC Sense Harness- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–15
Figure 3-14 AC Terminal Connections in the AC Interface/Transformer Enclosure - - - - - - - - - - - 3–15
Figure 3-15 AC Terminal Connections in the Main Inverter Enclosure- - - - - - - - - - - - - - - - - - - - 3–16
Figure 3-16 AC Terminal Connections in the AC Interface Enclosure - - - - - - - - - - - - - - - - - - - - 3–16
Figure 3-17 Connecting the AC Sense Harness - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3–17

152606 xv

Figures

Figure 3-18 AC Terminal Connections from the Utility- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–18
Figure 3-19 PV Array Cable Routing and Terminations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–19
Figure 3-20 Telephone Cable Routing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–21
Figure 3-21 RS232/FO Converter Kit Installation- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–23
Figure 3-22 Direct Connect Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3–24
Figure A-1 Electrical Diagram (sample)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A–3
Figure A-2 PV225S Schematic for Main Power Distribution (152812 A1) - - - - - - - - - - - - - - - - - A–4
Figure A-3 PV225S Schematic for Control Power Distribution (152812 A2) - - - - - - - - - - - - - - - - A–5
Figure A-4 PV225S Schematic for Converter Control Unit (152812 A3)- - - - - - - - - - - - - - - - - - - A–6

xvi 152606

Tables

Table 1-1 Ele ct rical Sp ec if icat ions 1–4
Table 1-2 Over/Under Voltage and Over/Under Frequency Ranges 1–4
Table 1-3 Environmental Specifications 1–6
Table 3-1 AC Terminal Wire Gauge, Bolt Size, and Torque Values 3–12
Table 3-2 DC Terminal Wire Gauge, Bolt Size, and Torque Values 3–12

152606 xvii

xviii

1

Introduction

Chapter 1, “Introduction” provides information about the features and

functions of the PV225S 225 kW Grid-Tied Photovoltaic Inverter.

Introduction

Description of the PV225S

The PV225S 225 kW Grid-Tied Photovoltaic Inverter is a UL 1741 Listed, utility
interactive, three-phase po wer c onversion system for grid-connected photovoltaic
arrays with a power rating of 225 kW. Designed to be easy to install and operate,
the PV225S automates start- up, shutdown, and fault detection scenarios. With
user-defin able power tracki ng that matc hes the inv erte r to the a rray and ad justabl e
delay periods, users are able to customize start up and shut down sequences.
Multiple PV225S inverter s are easily paralleled for larger power installations .

The PV225S power conversion system consists of a pulse-width modulated
(PWM) inverter, switch gear for isolation and prote ction of the conne cted AC and
DC power sources, and a custom high-efficiency Wye:Wye isolation transformer.
Housed in a rugged NEMA-3R rated, powder-coated steel enclosu re, the PV225S
incorporates sophisticated Intellimod
(IGBTs) as the main power switching devices. An advanced, field-proven,
Maximum Peak Power Tracke r (MPPT) integrated within the PV225S control
firmware ensures the opti mum power throughput for harvesting ener gy from the
photovoltaic arra y.

The advanced design of the PV225S includes an EMI output filter and the main
AC contactor located electrically on the utility side of the isolation transformer.
The location of the main AC contactor, and the ability to de-energize the isolation
transformer during times of non-operation, greatly reduces the night-time tare
losses consumed by an idle isolation transformer. An integrated soft-start circuit
precludes nuisanc e utility-tie circuit breaker trips as the result of isolation
transform er inr u sh current.

®

(IPM) Insulated Gate Bipolar Transistors

Additionally, the PV225S integrated controller contains self-protection features
including over and under volt age and frequency safeguards. An integral
anti-island pro tection sch eme prevents the in verter from feeding power to the grid
in the event of a utility outage. The PV225S includes a local user interface
comprised of an O
user-frie ndly, Graphic User Interface (GUI) provides a remote interface for
operator interroga tion of PV225S system status, control, metering/data logging
and protective functions within the PV225S. The status, control, and logging
features are also supported by the choice of three communication mediums,
allowing the informat ion to be acce ssed or commanded remotely.

The PV225S comes in two modules comprised of six enclosur es to house the
electronics descr ibed above. The first module includes the Main Inverter
Enclosure, Inductor Enclosure, DC Interface Enclosure, and Communications
Enclosure. The sec ond module includes the Transformer Enclosure and AC
Interface Enclosure. These components are identified in Figure 1-1 on page 1–3.
Figure 1-1 also shows the dimens ions and locations of the var ious enclosures that
comprise the PV225S.

See “Layout Options” on page 2–6 for information on configuration options.

1–2 152606

N/OFF switch, keypad, and 4-line, 80 character LCD di splay. A

Front View

AC

Interface

Enclosure

Communications
Enclosure

Transformer

Enclosure

Main

Inverter

Enclosure

Inductor

Enclosure

Description of the PV225S

DC Interface

Enclosure

Back

Figure 1-1

Front

Communications
Enclosure

AC Interface
Enclosure

AC Side View

Dimensions (Not to scale)

Front

DC Interface
Enclosure

Back

Inductor

Enclosure

DC Side View

152606 1–3

Introduction

System Specifications

The PV225S has been designed for photovoltaic power systems, which operate
within the following spec ifications.

CAUTION: Equipment Damage

Operation of the PV225S in a manner other than specif ied in this manual may cause
damage to the PV225S and other system components and will void the terms of the
warranty.

Electrical Specifications

Table 1-1 provides the AC and DC specifications for the PV225S.

Table 1-1

Specification PV225S-480-P

Nom in al AC In pu t Voltage
(+10% to -12% acceptable range)

Maximum AC Output Current 271 A
Nom inal AC I n pu t Freq uency

(+0.5 to -0.7 Hz acceptable r ange )
Output Power 225 kW
Peak Power Tracking Window 300 to 600 Vdc
Maximum Open Circuit Voltage 600 Vdc
Maximum DC Input Current 781 amps

Electrical Specifications

Over Voltage, Under Voltage and Frequency Ranges

T able 1-2 provides the over voltag e, under voltage, over-frequency , and
under-frequency detection limits for the PV225S. These detection limits have
been factory tested and deemed to be in compli an ce with IEEE-292 and UL 1741
requirements for uti lity interaction.

Table 1-2

Vac Condition
(% of Nominal)

Vac < 50% Vac < 240 6 cycles
50% <
88% < Vac <
110% < Vac < 137% 528 < Vac < 657 2 seconds
137% <
f < rated -0.7 f < 59.3 6 cycles
f > rated +0.5 f > 60.5 6 cycles

Over/Under Voltage and Over/Under Frequency Ranges

Voltage Range Trip Time

Vac < 88% 240 < Vac < 422 2 seconds

110% 422 < Vac < 528 normal operation

Vac 657 < Vac 2 cycles

480 Vac
(422 to 528 Vac)

rms

60 Hz
(59.3 to 60.5 Hz)

PV225S-480-P

1–4 152606

System Ground Requirements

This product is intended to be installed as part of a permanently grounded
electrical system pe r the National El ectric Code ANSI/NFPA 70. A copper gro und
rod must be installed within thr ee feet of the PV225S enclosures and connec ted to
the unit as described in “System Grounding” on page 3–12. The single-point
ground for the system is to be made at the AC ground bus bar (TB12) in the AC
Interface En clo sur e.

System Neutral Requirements

The PV225S is designed to be installed as a 4-wir e system. As required by the
UL 1741 listing, a neutral conductor from the util ity-interconnect must be
terminated at TB11 within the AC Interface Enclosure to ensure that the AC
voltage sensing circuit can per form 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 essentiall y at ground potential. No
power will flow through the neutral conductor.

Utility Side Isolation Transformer Requirements

The PV225S is supplied with a high-efficiency custom Wye:Wye, isolation
transformer as part of the AC Interface/Transformer assembly. The utility side
windings of the isolation tr ansformer are configured Wye and must match the
voltage at the utilit y inter-tie. The PV225S is a balanced, three -phase,
current-sourcing inverter and only operates with the pres ence of a stable utility
voltage. The transformer is also supplied with a neutral connection on the utility
interconnect. Connection of this utility-side neutral does not affect the operation
of the inverter, however connection of the neutral on the inverter-side does affect
the operation and must be left floating or disconnected. Single-phase, grounded
loads which may be present between the transformer and utility, will maintain
their existing grou nd refer ence at the utility distribution transformer.

System Specifications

CAUTION: Equipment Damage

If the Isolation Transformer (T6-X0) neutral terminal is tied to ground, it will cause
irreparable damage to the PV225S. Check local regu lations for their requirements
regarding the connec tion of the neutral.

WARNING: Lethal Voltage

Grounding the neutra l of a W ye -wound transfor mer may create an “open delta ” condit ion ,
depending on the utility configuration. This condition may keep the PV225S from
detecting a loss of phase condition on the utility system, which may allow potentially
lethal volta ge to be present on the open-pha s e wiring.

152606 1–5

Introduction

Environmental Specifications

The following environment al specifications are the same for both models of the
PV225S 225 kW Grid-Tied Phot ovoltaic Inverter.

Table 1-3

Specification Value

Dimensions

Weight

Allowab le A mb ien t Temperature

Relative Humidity To 95%, Non-condensing
Elevation Power Derated above 6600 ft
Clearan ce (ven t ila tion an d

serviceability)

Environmental Specifications

Inverter and DC Interface

Transformer and AC Interface

Overall System Footprint:

Layout Option A

Layout Option B

Inverter and DC Interface
Transformer and AC Interface
Overall Weight

Operating
Storage

88.5 in H x 80 in W x 32 in D
(225 cm H x 203 cm W x 81 cm)

49.5 in H x 61.5 in W x 35.5 in D
(126 cm H x 156 cm W x 90 cm D)

14 ft W x 5 ft L (approximate)
(4.3 m x 1.5 m)

10 ft W x 9 ft L (approximate)
(3 m W x 2.7 m L)

2300 lbs (approximate)
2350 lbs (approximate)
4650 lbs (approximate)

-20 °C to 50 °C Maximum

-40 °C to 50 °C Maximum

In front of access doors: 36 in (91 cm)
In front of access panels: 36 in (91 cm)
Sides: 12 in (30 cm)
Back: 6 in (15 cm)

Maximum Distance between Main
Inverter E ncl o sur e an d AC
Interface/Transformer Enclosure

1–6 152606

15 ft (4.5 m)