CPS SCA Series Operating instructions

Type
Operating instructions

This manual is also suitable for

CPS SCA Series Grid-tied PV Inverter
CPS SCA20KTL-DO-R/US-480
and SCA25KTL-DO-R/US-480
Installation and Operation Manual - Rev 1.0
CHINT POWER SYSTEMS AMERICA CO.
Revision 1.0 - Sep 2019
Revision History
Rev Number Chap/Sec Rev Date Description
1.0 N/A Sep 2019 Initial Release
Table of Contents
BEFORE YOU START… ....................................................................... 1
1. IMPORTANT SAFETY INSTRUCTIONS............................................. 3
2. OVERVIEW ................................................................................ 10
2.1 INVERTER FOR GRID-TIED PV SYSTEMS .................................................. 10
2.2 PRODUCTFEATURES ......................................................................... 10
2.3 PRODUCTPROTECTION FUNCTIONS ...................................................... 11
2.4 APPEARANCE AND MAINITEMDESCRIPTION .......................................... 12
2.5 SCHEMATIC DIAGRAM AND CIRCUITDESIGN ........................................... 13
2.6 ANTI-ISLANDING DETECTION .............................................................. 14
2.7 DCGROUND FAULT PROTECTION......................................................... 14
2.8 SURGE SUPPRESSION ........................................................................ 14
2.9 DCARC-FAULT PROTECTION ............................................................... 14
3. INSTALLATION ........................................................................... 15
3.1 RECOMMENDATIONS BEFORE INSTALLATION ........................................... 16
3.2 MECHANICAL INSTALLATION ............................................................... 19
3.2.1 DIMENSIONS........................................................................ 19
3.2.2 INSTALLATION METHOD (SEE FIGURE3-2): .................................. 19
3.2.3 INSTALLATION SPACE REQUIREMENT .......................................... 21
3.2.4 MOUNTING THE INVERTER ONTO THE BRACKET............................. 22
3.3 ELECTRICAL INSTALLATION.................................................................. 28
3.3.1 REMOVING/REPLACING THE WIRING BOX COVER: ........................ 28
3.4 WIRING BOXES................................................................................ 30
3.4.1 DCCONNECTION .................................................................. 31
3.4.2 AC AND GROUNDCONNECTION ............................................... 38
3.5 COMMUNICATION CONNECTION ......................................................... 44
3.5.1 DESCRIPTION OF THE COMMUNICATION BOARD ........................... 45
3.5.2 RS485COMMUNICATION ...................................................... 46
3.5.3 RS485NETWORK SET-UP........................................................47
3.5.4 COMMUNICATION WIRING...................................................... 48
3.5.5 RSD CONNECTION ................................................................ 49
4 COMMISSIONING (VIA WIRELESS ) ............................................. 50
4.1 APP DOWNLOAD ............................................................................ 50
4.2 COMMISSIONING CHECKLIST .............................................................. 50
4.2.1 MECHANICAL INSTALLATION .................................................... 50
4.2.2 CABLE CONNECTIONS ............................................................ 50
4.2.3 ELECTRICAL CHECK ................................................................ 51
4.3 COMMISSIONING STEPS .................................................................... 51
4.4 CONNECTION TO THE INVERTER WIRELESS ........................................... 51
5 APP INTERFACE ......................................................................... 56
5.1 OVERVIEW .................................................................................... 56
5.2 MAIN SECTION ............................................................................... 56
5.3 RUNNING DATA .............................................................................. 58
5.4 SETTINGS ...................................................................................... 59
5.4.1 INVERTER PARAMETERS .......................................................... 60
5.4.2 READ/WRITE REGISTER .......................................................... 61
5.4.3 COMMANDS ........................................................................ 62
5.4.4 ENABLE/DISABLE .................................................................. 64
5.4.5 PROTECT ............................................................................ 71
5.4.6 LVRT/HVRT ....................................................................... 77
5.4.7 ACTIVEPOWERDERATING ........................................................ 82
5.4.8 REACTIVEPOWERDERATING ..................................................... 85
5.4.9 OTHERS .............................................................................. 91
5.5 FAULT RECORDING ........................................................................... 94
5.5.1 FIRMWARE UPGRADE ............................................................. 94
5.5.2 UPGRADE THEINVERTER ......................................................... 95
5.5.3 UPGRADE THELINKIT ............................................................ 97
5.6 HISTORY ........................................................................................ 97
5.7 TURN ON/OFF .............................................................................. 98
6 FAULT SHUTDOWN AND TROUBLESHOOTING ............................100
6.1 LEDFAULT ANDTROUBLESHOOTING .................................................. 100
6.2 FAULT ANDTROUBLESHOOTING ......................................................... 101
7 MAINTENANCE AND DE-INSTALLATION .....................................110
7.1 PRODUCTMAINTENANCE ................................................................ 110
7.1.1 CHECK ELECTRICAL CONNECTIONS ........................................... 110
7.1.2 CLEAN THEAIR VENT GRATE .................................................. 110
7.1.3 REPLACE THE COOLING FANS.................................................. 111
7.1.4 REPLACE THE INVERTER ........................................................ 112
7.2 DE-INSTALLING THE INVERTER ........................................................... 114
8 ACCESSORIES ...........................................................................115
8.1 FUSE BYPASS TERMINALS ................................................................. 115
8.1.1 BYPASS INPUT TER MINAL INSTR UCTIO NS: .................................. 115
8.2 SHADE COVER (SSC-25ST-2) ........................................................... 116
8.2.1 PROTECTION FROMHARSH CONDITIONS ................................... 116
8.2.2 INCREASED ENERGY PRODUCTION ........................................... 116
8.3 Y-COMB TERMINAL BLOCK (OPTIONAL) .............................................. 117
9 TECHNICAL DATA ......................................................................118
9.1 DATASHEET ...................................................................................118
9.2 MEASUREMENT TOLERANCES ............................................................120
9.3 PRODUCTIONGRAPHS .....................................................................121
9.3.1 HIGHTEMPERATURE DERAT ING GRAPH .....................................121
9.3.2 ALTITUDEDERAT ING GRAPH ...................................................122
9.3.3 GRID VOLTAGEDER ATING GRAPH ............................................122
9.3.4 REACTIVE POWER CAPABILITY .................................................123
10 LIMITED WARRANTY ................................................................125
1
Before You Start…
Scope
This Installation and Operation manual contains important information, safety
guidelines, detailed planning and setup information for installation, as well as
information about configuring, operating and troubleshooting the
CPS SCA20KTL-DO-R/US-480 and CPS SCA25KTL-DO-R/US-480
3-Phase String Inverters. Here after in this manual this equipment may be
referred to simply as the inverters. Be sure to read this manual carefully before
operating or servicing the inverters.
Audience
The information in Chapters 2 “Overview”, 4 “Commissioning (via wireless)", 6
"APP Interface, and 8 "Accessories" is intended for the owner and operator of
the inverter, and does not require any special training or qualifications. The
information in Chapters 3 “Installation”, 4 "Commissioning", 7 “Maintenance
and De-Installation” is intended for qualified personnel only. Qualified
personnel have training, knowledge, and experience in:
Installing electrical equipment and PV power systems (up to 1000V
DC
).
Applying all local installation codes.
Analyzing and eliminating the hazards involved in performing electrical
work.
Selecting and using Personal Protective Equipment (PPE).
Installation, commissioning, troubleshooting, and maintenance of the
inverter must be done only by qualified personnel.
2
Thank you for choosing a CPS 3-Phase String Inverter. These PV Inverters
are high performance and highly reliable products specifically designed for the
North American Solar market.
Instructions inside this user manual will help you solve most installation and
operation difficulties. Installation, commissioning, troubleshooting, and
maintenance of the inverter must be performed by qualified personnel. If you
encounter any problems during installation or operation of this unit, first check
the user manual before contacting CPS Customer Service. This user manual
is applicable for the following models:
CPS SCA20KTL-DO-R/US-480 and CPS SCA25KTL-DO-R/US-480
The manual will be periodically updated or revised due to the product
development or improvement. The latest version of this manual can be
acquired via the website at www.chintpowersystems.com.
3
1. IMPORTANT SAFETY INSTRUCTIONS
(SAVE THESE INSTRUCTIONS)
Please read this user manual carefully before installation of the inverter. CPS
reserves the right to refuse warranty claims for equipment damage if the user
fails to install the product according to the instructions in this manual.
Warnings and symbols in this document
DANGER:
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
DANGER:
DANGER indique une situation dangereuse qui, si elle n'est
pas évitée, entraînera la mort ou des blessures graves.
WARNING:
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
AVERTISSEMENT:
AVERTISSEMENT indique une situation dangereuse qui, si
elle n'est pas évitée, pourrait entraîner la mort ou des
blessures graves.
CAUTION:
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
ATTENTION:
ATTENTION indique une situation dangereuse qui, si elle
n'est pas évitée, peut entraîner des blessures mineures ou
modérées.
4
Markings on the product
CAUTION:
Risk of electric shock from energy stored in
capacitor.
Do not remove cover until 5 minutes after
disconnecting all sources of supply.
CAUTION:
Risk of electric shock, do not remove cover. No
NOTICE:
NOTICE indicates a hazardous situation which, if not avoided,
could result in the inverter working abnormally or property
loss.
AVIS:
AVIS indique une situation dangereuse qui, si elle n'est pas
évitée, pourrait entraîner un fonctionnement anormal de
l'onduleur ou une perte de propriété.
INSTRUCTION:
INSTRUCTION indicates important supplementary
information or provides skills or tips that can be used to help
you solve a problem or save you time.
INSTRUCTION
INSTRUCTION indique des informations supplémentaires
importantes ou fournit des compétences ou des conseils qui
peuvent être utilisés pour vous aider à résoudre un problème
ou vous faire gagner du temps.
5
user serviceable parts inside. Refer servicing to
qualified service personnel.
WARNING:
Electric shock hazard. The DC conductors of this
photovoltaic system are ungrounded and may be
energized.
CAUTION:
Risk of electric shock.
a) Both ac and dc voltage sources are terminated
inside this equipment. Each circuit must be
individually disconnected before servicing.
b) When the photovoltaic array is exposed to light,
it supplies a dc voltage to this equipment.
WARNING:
Electric shock hazard.
The DC conductors of this photovoltaic system are
normally ungrounded but will become intermittently
grounded without indication when the inverter
measures the PV array isolation.
ATTENTION:
Risque de choc électrique.
Les conducteurs DC de ce système photovaltaic
ne sont pas mis à la terre et peut être alimenté.
ATTENTION:
Risque de choc électrique.
a) Les deux sources de tension CA et CC sont
résiliées à l`intérieur de cet équipement.
Débranchez chaque circuit individual avant tout
6
entretien.
b) Quand les panneaux photovoltaïque sont
exposés à la lumière, ils fournissent une tension
en courant continu à l´équipement.
ATTENTION:
Risque de choc électrique. Les conducteurs DC de
ce système photovaltaic ne sont pas mis à la terre
normalement, mais deviendra mis à la terre par
intermittence lorsque l'onduleur mesure l'isolement
du champ photovoltaique.
CAUTION:
Hot surfaces.To reduce the risk of burns, do not
touch.
ATTENTION:
Surface chaude. Pour réduire le risqué de brûlures
ne pas toucher.
WARNING:
This AFCI device automatically resets and may
only be used when allowed by NFPA 70.
ATTENTION:
Cet appareil AFCI se réinitialise automatiquement
et ne peut être utilisé que si la norme NFPA 70 le
permet.
WARNING:
For continued protection against risk of fire,
replace only with same type and ratings of fuse.
ATTENTION:
Pour continuer d'assurer la protection contre les
7
risques d'incendie, il faut remplacer les fusibles de
même type et courant.
WARNING:
Hazardous voltage area under the plastic cover.
Do not open fuse holders under load ! Protective
gear must be used/worn before accessing fuses !
Do not open fuse holders if bypass terminals were
installed !
ATTENTION:
Zone de tension dangereuse sous le couvercle en
plastique.
Ne pas ouvrir les porte-fusibles sous charge!
L'équipement de protection doit être utilisé / porté
avant d'accéder aux fusibles!
N'ouvrez pas les porte-fusibles si des bornes de
bypass ont été installées!
WARNING:
High touch current .
Earth connection essential before connecting
supply.
ATTENTION:
Courant tactile élevé.
La connexion à la terre est essentielle avant de
connecter l'alimentation.
For more details please see the user manual.
Pour plus de détails s'il vous plaît voir le manuel
d'utilisation.
8
WARNING:
All the installation and wiring connections must be performed by
qualified technical personnel. Disconnect the inverter from the PV
modules and the AC grid before maintaining or servicing the
equipment.
Failure to follow these instructions and other relevant safety
procedures may result in voiding of the warranty and/or damage to the
inverter or other property!
Risk of electric shock and fire. Use only with PV modules that have
a maximum system voltage of rating of 1000V
DC
or higher.
Electric shock Hazard. The DC conductors of this photovoltaic
system are normally ungrounded but will become intermittently
grounded without indication when the inverter performs the PV array
isolation measurement.
Shock Hazard. The inverter is energized from both AC and DC
sources. Disconnect all energy sources before servicing.
For continued protection against risk of fire, replace only with same
type and ratings of fuse.
DANGER:
Disconnect the inverter from the AC grid and PV modules before
removing covers or opening the equipment. Wait at least 5 minutes
after disconnecting from the DC and AC sources before servicing or
maintaining the inverter. Ensure hazardous high voltage and energy
inside the inverter has been discharged prior to servicing.
NOTICE:
The inverters are designed to only interconnect with an AC power
source as part of the public electric utility grid. Do not connect the AC
output of the inverters directly to any private electric utility power
9
equipment. The inverters are to be installed with floating or
ungrounded PV arrays only.
CAUTION:
CPS SCA20KTL-DO-R/US-480 and SCA25KTL-DO-R/US-480
inverters weigh approximately 22kg (48.5 pounds). The wirebox
portion weighs approximately 6kg (13.2 pounds).
Ensure the mounting bracket is properly installed before hanging the
inverter and wirebox on the bracket. A team of two is recommended to
lift and place the inverter and wirebox into position.
INSTRUCTION:
Please check with your local electric utility supply company before
selecting a grid standard. If the inverter is operated with an incorrect
grid standard, the electric utility supply company may cancel the
interconnection agreement.
Placing the inverter into operation before the overall system complies
with the national codes, rules and safety regulations of the application
is also not permitted.
WARNING:
This product can expose you to chemicals including lead, known to the
state of California to cause cancer and birth defects or other
reproductive harm. For more information, go to
www.P65Warnings.ca.gov
10
2. Overview
2.1 Inverter for grid-tied PV systems
CPS SCA20KTL-DO-R/US-480 and SCA25KTL-DO-R/US-480 3-Phase
Transformerless String Inverters are designed for use with an ungrounded
array in carport, commercial rooftop, and large utility scale PV grid-tied
systems. The system is generally made up of PV modules, a 3-Phase String
Inverter with a fused combiner/disconnect, and AC power distribution
equipment (Figure 2-1). The inverter converts the available DC energy from
the PV modules to AC power by synchronizing the output current to the same
frequency and phase as the AC grid. All or part of the AC power is supplied to
local loads, and the surplus power is exported to the electric utility grid.
Figure 2-1 Grid-tied PV system
2.2 Product Features
High conversion efficiency: Advanced 3-level conversion topology with
Space-Vector PWM; Max. efficiency: 98.5%, CEC efficiency: 98.0%.
Grid adaptability: IEEE 1547 Interconnect Standard and CPUC Rule 21
applicable; Reactive Power; >0.99 PF (±0.8 adjustable), and optional local
or remote Active Power Curtailment.
11
Flexible communication: Supports standard CPS Modbus RS485,
SunSpec Modbus, and HTTPS/XML communications via Flex Gateway to
ensure compatibility with 3
rd
party monitoring and control systems. The
Flex Gateway enables further command/control as well as remote firmware
upgrades. Flex Gateway card is an optional accessory. Refer to Flex
Gateway manual for further detailed information.
Wide DC input voltage range: Operating DC Input Voltage Range:
200-950V
DC
; Max DC input voltage: 1000V
DC
.
Long Service Life: Designed with thin-film capacitors to extend inverter's
service life.
2 MPPTs: Multi-channel MPPT (Maximum Power Point Tracker) enables
maximum design flexibility and energy harvest optimization over the life of
the system.
Separable Wirebox: The wirebox enables fused input of industry standard
conductor assemblies.
High protection degree: Powder coated aluminum NEMA 4X enclosure
meets the demanding needs of both indoor and outdoor use.
Intelligent Integration: Integrated load break rated DC/AC disconnect
switches, and up to 6 positive fused string inputs eliminate the need for
external DC combiner boxes, simplifying installation and the need for DC
BOS equipment.
2.3 Product Protection Functions
Reverse polarity protection of DC input
AC and DC Short circuit protection
Arc-fault detection and circuit interruption
Anti-islanding detection with bi-directional frequency perturbation
DC Input and AC output over-voltage protection
12
DC Input over-current protection
DC input insulation against ground monitoring
DC injection of AC output
AC output voltage and frequency monitoring
Leakage current against ground monitoring
Internal enclosure temperature monitoring
IGBT power module temperature monitoring
RSD function
2.4 Appearance and Main Item Description
1
5
2
3
4
6
7
Figure 2-2 Diagram of the Inverter assembly
Main items of the Inverter:
Main inverter enclosure
Inverter wirebox
Inverter mounting bracket
Cooling fans
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CPS SCA Series Operating instructions

Type
Operating instructions
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