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CPS SCA Series Installation And Operation Manual

Grid-tied pv inverter
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CPS SCA Series Grid-tied PV Inverter
CPS SCA50KTL-DO/US-480
and SCA60KTL-DO/US-480
Installation and Operation Manual - Rev 3.4
CHINT POWER SYSTEMS AMERICA CO.
Revision 3.4 - January 2021

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  • Page 1 CPS SCA Series Grid-tied PV Inverter CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 Installation and Operation Manual - Rev 3.4 CHINT POWER SYSTEMS AMERICA CO. Revision 3.4 - January 2021...
  • Page 3 Revision History Chap/Sec Rev Date Description Number Aug 2016 Initial Release Sep 2016 H4 Wirebox, Operating Mode Feb 2017 H4 Termination, AC Terminal 3, 5, 7, 8 Sept 2017 AC Terminal, Parameters, Troubleshooting, Accessories 3, 5, 6, 10 Feb 2018 Increased kVA Ratings Mar 2019 Allow MPPT to be Unbalanced...

  • Page 4: Table Of Contents

    Table of Contents BEFORE YOU START… ................1 IMPORTANT SAFETY INSTRUCTIONS ..........3 OVERVIEW ..................9 ..........9 NVERTER FOR GRID TIED SYSTEMS ..............10 RODUCT EATURES ........... 11 RODUCT ROTECTION AND UNCTIONS ): ........12 MART NVERTER UNCTIONS DEFAULT STATE ........
  • Page 5 3.3.4 AC and Ground Connection ..........53 3.3.5 AC Connections ..............55 ............60 OMMUNICATION ONNECTION 3.4.1 Description of the Communication Board ......61 3.4.2 RS485 Communication ............61 3.4.3 RS485 Network Set-up ............62 3.4.4 Communication Wiring ............64 USER INTERFACE................65 LCD P ............
  • Page 6 6.2.9 File Export (local) ............... 108 6.2.10 Firmware Update (local) ..........108 ON/OFF ............... 108 OWER 6.3.1 Manual Power ON/OFF ............. 108 6.3.2 Automatic Turn ON/OFF ............ 109 ................ 109 ISTORY ECORD ..............110 EVICE NFORMATION .................. 111 TART ................112 ..............
  • Page 7 9.2.2 Increased Energy Production ..........134 ) ........... 135 ERMINAL LOCK PTIONAL TECHNICAL DATA ................ 136 10.1 ................136 ATASHEET 10.2 ............138 EASUREMENT OLERANCES 10.3 ..............139 RODUCTION RAPHS 10.3.1 High Temperature Derating Graph ....... 139 10.3.2 Altitude Derating Graph ..........140 10.3.3 Grid Voltage Derating Graph ........

  • Page 8: Before You Start

    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 SCA50KTL-DO/US-480 and CPS SCA60KTL-DO/US-480 3-Phase String Inverters. Here after in this manual this equipment may be referred to simply as the inverters.
  • Page 9 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 SCA50KTL-DO/US-480 and CPS SCA60KTL-DO/US-480 Please keep this user manual on hand for quick reference.

  • Page 10: Important Safety Instructions

    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.
  • Page 11 Warnings and 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 user serviceable parts inside.
  • Page 12 Warnings and Markings on the product (cont'd) WARNING: For continued protection against risk of fire, replace only with same type and ratings of fuse. WARNING: HAZARDOUS VOLTAGE AREA UNDER THE PLASTIC COVER. DO NOT OPEN FUSE HOLDERS UNDER LOAD! PERSONAL PROTECTIVE EQUIPMENT MUST BE USED/WORN BEFORE ACCESSING FUSES! DO NOT OPEN FUSE HOLDERS IF BYPASS TERMINALS ARE INSTALLED!
  • Page 13 The inverters are to be installed with floating or ungrounded PV arrays only. CAUTION: CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 inverters weigh approximately 56kg (123.5 pounds). The wirebox portion weighs approximately 15kg (33 pounds). Ensure the mounting bracket is properly installed before hanging the inverter and wirebox on the bracket.
  • Page 14 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.
  • Page 15 WARNING: The DC Switch is rated to break loads under normal operating conditions. However, a DC short circuit could be hazardous, and the following procedures should be followed before turning OFF the DC Switch under fault conditions. If there is a fault and it is safe to access the inverter: 1.

  • Page 16: Overview

    Overview 2.1 Inverter for grid-tied PV systems SCA50KTL-DO/US-480 SCA60KTL-DO/US-480 3-Phase Transformerless String Inverters are designed for use with an UNGROUNDED PV 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).

  • Page 17: Product Features

    Reactive Power; >0.99 PF (±0.8 adjustable), Selectable Apparent Power rating enables Full Active Power rating to +/-0.91 PF, and optional local or remote Active Power Curtailment. Flexible Communication: Supports standard CPS Modbus RS485,  SunSpec Modbus, and HTTPS/XML communications via FlexOM gateway card to ensure compatibility with 3rd party monitoring and control systems.

  • Page 18: Product Protection And Functions

    Intelligent Integration: Integrated DC/AC disconnect switches, and up to  15 fused string inputs eliminate the need for external DC combiner boxes, simplifying installation and the need for DC BOS equipment. The rapid shutdown version wirebox has integrated the rapid shutdown PLC transmitter, requiring no field wiring, and eliminated the negative DC fuses in accordance with the 2017 National Electric Code.

  • Page 19: Smart Inverter Functions ( Default State )

    2.4 Smart Inverter Functions: The CPS SCA50KTL-DO/US-480 and CPS SCA60KTL-DO/US-480 3-Phase String Inverters employ Smart Inverter (Grid Support) Functions in compliance with UL1741-SA, SA8-SA15. The default activation status is indicated below. Smart Inverter Function IEEE1547-2014 Rule 21 ISO-NE Anti-islanding Enabled...

  • Page 20: Appearance And Main Item Description

    Appearance and Main Item Description 5 6 7 Figure 2-2 Diagram of the Inverter Assembley Main Items of the Inverter: ① Main inverter enclosure ⑥ User LCD display ② Inverter wirebox ⑦ User Key buttons ③ Inverter mounting bracket ⑧ DC switch: DC power on/off ④...

  • Page 21: Schematic Diagram And Circuit Design

    2.6 Schematic Diagram and Circuit Design The basic electrical schematic diagram of the CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 3-Phase String Inverters are shown in Figure 2- 3 and Figure 2-4. The input from PV source circuits passes through surge protection circuitry, DC EMI wave filters, and independent DC-DC boost circuitry to achieve maximum power point tracking and boost the voltages to a common DC bus.
  • Page 22 Tigo TS4-F and APsmart RSD-S-PLC platforms to conform to 690.12 of the 2017/2020 National Electric Code. The negative fuses have been removed from this model in accordance with 690.9(C). Figure 2-4 CPS SCA50/60KTL-DO/US-480 Inverter Schematic, Rapid Shutdown (RSD) Wirebox...

  • Page 23: Anti-Islanding Detection

    2.7 Anti-Islanding Detection The SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 3-Phase String Inverters include Unintentional Islanding detection as required by UL 1741/IEEE 1547. The inverter will continuously make bi-directional perturbations to the frequency of the output current by injecting a small amount of reactive power to detect a possible islanding condition. If the grid is stable, these small perturbations will have negligible effects on the system voltage frequency.

  • Page 24: Dc Arc-Fault Protection

    2.10 DC Arc-fault Protection The inverters include DC Arc-fault detection compliant with UL 1699B. The inverter will detect electrical noise that is indicative of a DC series arc. Upon detection of an arc-fault, the inverter will cease operation. 2.11 Module-Level Rapid Shutdown The RSD version of the inverter wirebox includes a Sunspec powerline communication transmitter for use with either Tigo TS4-A-F (module/rack mounted MLPE) and smart modules integrated with the TS4-F in their junction...

  • Page 25: Installation

    Installation This chapter describes the planning and installation procedures for the SCA50KTL-DO/US-480 and SCA 60KTL-DO/US-480 3-Phase String Inverters. Please read carefully and install the products following the step-by-step instructions. The inverter and other main items are shipped in two separate packages, consisting of A.) the main inverter enclosure and B.) the wirebox, mounting bracket, user manual, and accessory kit.
  • Page 26 Table 3-2 Accessory Kit Item Q’ty Note 4 for securing the wiring box to the main enclosure; 6 for securing the M6 X18mm Phillips inverter to the mounting bracket; 1 for screw the External Ground connection, 1 spare 5 pin PCB connector For the RS485 communication (Input) plug 3 pin PCB connector...

  • Page 27: Recommendations Before Installation

    3.1 Recommendations Before Installation See Chapter 10, Technical Data for specification ranges and limits. NOTICE: DESIGN AND INSTALLATION RECOMMENDATIONS Maintaining NEMA4X Rating in essential to assure safe operation of the inverter. Water ingress is likely to cause a failure that could result in an unsafe condition.
  • Page 28 PRE-INSTALLATION CHECKLIST Check that the inverter environmental specifications (protection degree,  operating temperature range, humidity and altitude, etc) meet the requirements of the specific project location. Make sure that the electric utility grid voltage is within range for the grid ...
  • Page 29 Without inspection, customers will run the risk of having inverter electronic circuit damage when power is applied to inverter during startup. It is advised that customers contact CPS for further advice and to arrange schedule for CPS service personnel to perform inspection of inverter on site.

  • Page 30: Mechanical Installation

    15° from horizontal. (c) When tilted backward at ≤75° from horizontal in an outdoor environment, the CPS Shade Cover (SSC-60ST) accessory is required to be installed. See Section 9.2 for more information. (d) Do not mount the inverter leaning forward.
  • Page 31 SHADE COVER >15 b.) SHADE COVER REQUIRED a.) NO SHADE COVER REQUIRED c.) NOT > 90° TILTED FORWARD d.) NOT UPSIDE DOWN Figure 3-2 Inverter Mounting Options...

  • Page 32: Installation Space Requirement

    NOTICE: When the inverter is mounted tilted backward at ≤75° from horizontal in an outdoor environment, the CPS Shade Cover (SSC-60ST) accessory must be installed on the inverter to avoid direct sunlight. NOTICE: The spacing between two adjacently mounted inverters must be ≥19.7in (500mm).
  • Page 33 Figure 3-3 Inverter Wall Mounting Dimensions...
  • Page 34 ≥13.8in (350mm) provided a baffle is installed. Installing an aluminum or galvanized steel baffle (Not supplied by CPS) with the dimensions detailed above is intended to divert or deflect warm exhaust air from entering the adjacent inverter.
  • Page 35 8in. 12in. 12in. 12in. Figure 3-5 Inverter Pillar or Column Mounting Dimensions INSTRUCTION: If the inverter is installed on a pillar or column (instead of solid wall), the space from the bottom of one inverter to the top of the inverter below may be as small as 11.8in (300mm).
  • Page 36 12" 12" 14" WALL OR PASSIVE CABINET BAFFLE MUST: 1. EXTEND 8” MIN. ABOVE AND BELOW FANS 2. EXTEND 4" MIN. PAST FRONT OF INVERTER 3. LOCATED 7" MIN. FROM BOTH INVERTERS...

  • Page 37: Mounting The Inverter Onto The Bracket

    3.2.4 Mounting the Inverter onto the Bracket Step 1 Locate and mark the 8 holes on the wall, PV racking structure, or bearing surface for attaching the inverter mounting bracket as shown in Figure 3-6. Figure 3-6 Dimensions of the Bracket Anchoring Holes for Mounting (a) PV Racking Mount: Locate holes or anchors at the marked positions;...
  • Page 38 (b) Concrete Wall Mount: Drill holes at the marked positions with a 0.4in. (10mm) masonry bit and insert M8 Expansion Anchors into the holes (expansion anchors not provided); Fasten the Mounting Bracket with the M8x25 Assembling Bolts (not supplied). Figure 3-7 and Figure 3-8.
  • Page 39 Figure 3-10 and mount it onto the bracket. CAUTION: The main enclosure of the CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 3-Phase String Inverters is approx 56kg (123.5 pounds). Ensure the mounting bracket is properly installed and secured before hanging the inverter on the bracket.
  • Page 40 Figure 3-9 Mount the Main Enclosure on the Bracket by Lifting Sling Figure 3-10 Grab Handle Position...
  • Page 41 Step 3 Install the wirebox: Remove the cover plate at the bottom of the main enclosure. Tool required: No. 2 Phillips head screwdriver Figure 3-11 Main Enclosure Cover Plate Remove screws securing the bulkhead cover at the top of the wirebox – COVER IS NOT WATER-TIGHT.
  • Page 42 Figure 3-12 Wiring Bulkhead Cover Save the bulkhead cover and screws, and attach the cover to the left side of the wirebox after the wirebox is attached to the inverter enclosure. Covers may be required in the future if an inverter or wirebox is to be removed during servicing (see step 6, Figure ).
  • Page 43 Step 5 Attach the main enclosure and the wiring box to the mounting bracket with the M6x18 screws (6 pcs). (see Figure 3-14). Tool required: No.3 Phillips head screwdriver, torque value of 4N.m (35.4in-lbs) Figure 3-14 Secure the Main Enclosure and Wiring Box to the Bracket...
  • Page 44 Step 6 Attach the bulkhead cover shown in Step 7 Figure to the left side of the wiring box. (see 3-12 Step 8 Figure ). Tool required: No. 2 Phillips head screwdriver, 3-15 torque value of 1.6N.m (14.2in-lbs) Figure 3-15 Attach the Cover to the left side of the Wiring Box Step 9 Optional - Install an anti-theft padlock when the installation is complete.
  • Page 45 Figure 3-16 Location of the Anti-Theft Padlock The anti-theft padlock should meet the dimensional requirements shown in Figure 3-17. Recommended lock size: A: Shackle diameter 3~6mm B: Shackle width 20~50mm C: Shackle height 20~50mm Figure 3-17 Dimensions of Anti-Theft Padlock Shackle...

  • Page 46: Electrical Installation

    ExcelTM based Solar PV Array sizing tool is available for download at http://www.chintpowersytems.com and is obtainable by selecting the Product Downloads link to acess the CPS String Sizing tool. This is an optional design tool to help guide designers by matching the PV panel type and quantity to the inverter’s power rating.
  • Page 47 Step 1 Use a No. 3 Philips head screwdriver to remove the 4 screws on the wiring box and remove the cover. (See Figure 3-19) Figure 3-19 Removing the Wiring Box Cover To reinstall the cover, replace cover and align the screws. Use a No.

  • Page 48: Wiring Boxes

    3.3.2 Wiring Boxes Figure 3-20 Conduit Knock-out Locations on the wirebox ① Knock-outs for DC input, (3) 1-1/2 inch Trade Size (1.98" Dia) and (1) removable gland plate for custom size conduit (i.e. when use of 2 inch or 2-1/2 inch Trade Size conduit is required) – later models may not have gland plates.
  • Page 49 Figure 3-21 Internal Connection Points within the Standard wirebox Figure 3-22 Internal Connection Points within the RSD wirebox ⑤ DC Input fuse holder/terminal ⑥ DC SPD (Surge Protective Device) ⑦ Internal ground terminal(s) ⑧ AC output terminal block ⑨ Negative DC input busbar ⑩...

  • Page 50: Dc Connection

    3.3.3 DC Connection 3.3.3.1 Working mode These inverters are factory configured with three MPPTs which are electrically divided into separate PV input zones: PV Input-1, PV Input-2, and PV Input-3. Each 5-string PV input zone operates as a separate and independent Maximum Power Point Tracker (MPPT). Independent mode can be very useful for sites with partial shading of the array or with arrays consisting of different tilt or azimuth.
  • Page 51 Table 3-3 DC Input Specifications (Independent Mode) Specification (Independent Mode - per MPPT) Model SCA50KTL-DO/US-480 SCA60KTL-DO/US-480 33kW 33kW Max PV Power (Combined ≤ 90kW) (Combined ≤ 90kW) Max PV Voltage 1000Vdc 1000Vdc Start-up 330 / 80W 330 / 80W Voltage / Power Operating Voltage 200-950Vdc 200-950Vdc...
  • Page 52 AFCI and may increases the possibility of false DC Arc-Fault trips. Setting to Parallel Mode must be approved in advance by CPS and must be performed by a CPS Service Technician. Contact CPS Customer Service for further information. Select the DC conductor size and material for the inverters according to...
  • Page 53 The grounding busbars are electrically bonded by way of the inverter chassis. 3.3.3.2 DC Fuse Configuration/Selection The CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 inverter Standard wire boxes and the RSD wire boxes include touch safe fuse holders and preinstalled 20A DC fuses as factory standard. Ensure that the appropriate fuse values are used depending on the configuration of the PV array and by performing PV fuse sizing calculations for each string.
  • Page 54 Y branch connectors are used with DC field wiring to reduce PV source circuit home runs. CPS allows replacement of the factory installed 15A and 20A fuses with appropriate ampere ratings, however CPS does not provide nor stock these fuses.
  • Page 55 3.3.3.3 DC Conductor Connection To ensure the optimum performance of the inverter, please read the following guidelines before performing any DC connections. Confirm the maximum open circuit voltage of the PV modules is lower than 1000VDC under any conditions. Confirm that the PV modules for each MPPT within the inverter are of the same type and specification before connection.
  • Page 56 Sinofuse-White, and Mersen-Orange. See Table 3-7 for specified torque values. Table 3-7 DC Fuse Holder and Busbar Torque Value by Manufacturer Sinofuse TSA1038 Mersen USM1 CPS Neg Busbar Single Single Single Conductor...
  • Page 57 3.3.3.5 DC Connection for Standard and RSD Wirebox Using the 1-1/2 inch knockouts. Remove the factory installed liquid-tight hole plugs from the DC knockout holes in the wiring box and install 1-1/2 inch Trade Size conduit and conduit fittings. If the use of smaller conduit is desired, proper weather-tight reducing bushings may be installed.
  • Page 58 Terminate at fuseholders. The RSD wirebox only contains fuseholders for the positive DC conductors. Follow instructions in step 3 for the negative conductors. Strip approximately ½ inch of the cable jacket from the end of the string conductor. Insert the conductor into the fuseholder terminal ensuring the stranding of the conductor remains firmly twisted and does not separate.
  • Page 59 Figure 3-25 Bypass Terminal option installed within the Standard wirebox Before terminating the PV conductors to the Bypass Terminals, verify connector specifications (Table 3-9) and always verify polarity to avoid risk of reverse polarity. Table 3-9 Connector Specifications Bypass Conductor Wire Wire Min Torque...

  • Page 60: Ac And Ground Connection

    TRANSFORMER TRANSFORMER PER CODE PER CODE PER UT ILITY REQUIREMENTS OPTIONAL PER CPS OPTIONAL PER CPS NOTE: If the transformer neutral is not NOTE: If the transformer neutral is not connected to ground, additional ground connected to ground, additional ground...
  • Page 61 The transformer VA rating should be at least 100% of the sum of the connected inverter VA ratings. CPS recommends the transformer VA rating be selected based on IEEE C57.159-2016 Guide on Transformers for application in Distributed Photovoltaic (DPV) Power Generation Systems. It is...

  • Page 62: Ac Connections

    3.3.5 AC Connections This section includes instructions to connect the AC conductors to the inverter and grounding options. Table 3-10 Tools Required for Cable Termination Tools Remark 5mm flat screwdriver Internal grounding bar #3 Phillips head screwdriver External grounding 14mm hex socket wrench AC terminal block Diagonal pliers or cable cutters Cut cable...
  • Page 63 Grounding/Bonding. The inverter provides 1 grounding connection on the AC side and one bonding location. These configurations are illustrated below Figure 3-28). (a) Grounding via the ground busbar (left) [1] This is required for grounding the equipment by running the EGC with the ungrounded conductors.
  • Page 64 Table 3-11 Torque and Conductor Specifications Connection Point Conductor Range Torque Value AC output terminal #6-3/0 AWG (CU) 14.25 N-m (126 in-lbs） block #6-3/0 AWG (AL) Internal grounding bar 6-4 AWG (CU/AL) 5.65 N-m （50 in-lbs） External grounding 6-4 AWG (CU/AL) 5.65 N-m （50 in-lbs）...
  • Page 65 INSTRUCTION: The neutral conductor from the inverter to point of interconnection (POI) is optional. The function of the neutral, when used, is to provide a point of reference for measurement purposes that is essentially at ground potential. The neutral conductor is for control or measurement purposes only, and therefore may be sized according to NEC section 705.95(B).
  • Page 66 Figure 3-30 External Ground Point Location of wirebox NOTICE: Always connect the Ground conductor (EGC) before terminating any of the AC conductors. When the output of the inverter is connected to the grid, an external AC circuit breaker is required to be installed to safely disconnect the inverter from the grid should an over current event occur.

  • Page 67: Communication Connection

    50kVA = 80A CPS SCA50KTL-DO/US-480 110A 55kVA = 90A 60kVA = 100A CPS SCA60KTL-DO/US-480 125A 66kVA = 100A 3.4 Communication Connection CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 inverters support industry standard Modbus RS485 communication. 485_GND RS485_B- RS485_A+ 485_GND 12VGND +12V RS485_B- RS485_A+...

  • Page 68: Description Of The Communication Board

    Figure 3-32 Communication Connection Interfaces 3.4.2 RS485 Communication CPS recommends the following cable for inverter RS485 communications: CAT-5e or (3) 18-22AWG communication cables. It is recommended that industrial grade shielded twisted pair RS485 cable be used in lieu of unshielded twisted pair. Communication cable such as...

  • Page 69: Rs485 Network Set-Up

    RS485 communication cables are connected via the 5-pin connector to the port labeled (2) in Figure 3-33. When creating a network of multiple inverters, the cables are terminated to the same 5-pin connector and 3- pin connector. Figure 3-34 shows a single inverter communication connection in (1) and a network configuration in (2).
  • Page 70 Datalogger S402 S402 S402 Figure 3-34 RS485 Network Connection 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.

  • Page 71: Communication Wiring

    3.4.4 Communication Wiring Instructions for wiring the communications of one or a network of inverters: Open the inverter wiring box. Refer to Section 3.3.1 for instructions and torque requirements when replacing cover. Bring the communication cables into the wiring box through the provided knockout holes at the bottom, using similar methods to the AC and DC wiring.

  • Page 72: User Interface

    User Interface This section is intended to orient the user with the inverter interface prior to turning the system on and commissioning. 4.1 Description of LCD Panel The inverter’s LCD panel consists of the LCD screen, four LED status indicator lights, a buzzer, and four user keys, as shown in Figure 4-1. POWER GRID FAULT...
  • Page 73 Table 4-1 LED Indication Name Status Indication light Working Energized (control panel starts to Light on POWER power work) light Light off Power supply not working Light on In grid-tied power generation state Grid-tied Derated running status (light up 0.5s, operation Flash light off 1.6s)

  • Page 74: Operation State

    Table 4-2 Definition of the Keys Description Definition of function Escape key Back/end/mute Confirm entering the menu/confirm set Enter key value/Switch to parameter setting mode Page up in selection menu/+1 when setting parameters. Press more than 1 second to go to the last number when setting the parameters.

  • Page 75: Interface Types

    4.3 Interface Types Users can perform the corresponding operations with the 4 function keys, described in Table 4-2, according to the indications of the LCD display. The LCD screen will display different interfaces based on the operation modes of the inverter. There are four operation modes: Logo interface mode (as shown in Figure 4-2 LOGO Interface), Normal operation and Standby modes (as shown in Figure 4-3 Default Display Interface for Normal Operation), and Fault mode (as shown in Figure 4-4 History Record...
  • Page 76 The inverter will enter Standby mode when the output voltage and power of PV modules do not meet the startup conditions or PV voltage and input power are lower than the set value. The inverter will check automatically whether it meets the startup conditions in this mode until it turns back to normal mode.

  • Page 77: Commissioning

    Commissioning Before powering up the PV system it is important to check the installation for any hazards that may be present. For convenience, a commissioning checklist is included in this manual and can be found in the Appendix. 5.1 Mechanical Installation check Make sure that the mounting bracket is secure, and all screws have ...

  • Page 78: Commissioning Steps

    5.4 Commissioning Steps Complete the list above before commissioning the inverter as follows: Turn on the AC circuit breaker. Turn “ON” the external DC switch(s)/circuit breaker(s). Skip these two steps if there are no switches or circuit breakers. Switch the Inverter’s DC Switch to the “ON” position. When the energy supplied by the PV array is sufficient, the LCD screen of inverter will light up.
  • Page 79 Language setting ENGLISH 中文 Figure 5-2 Language Setting Set the grid standard. From the previous menu press ESC to return to the System Parameters menu. If the display had been previously returned to the main menu, follow the steps in (4) to access System Parameters again.
  • Page 80 Grid Connection Rule IEEE1547 CA Rule-21/UL 1741 SA HECO-HM HECO-ML ISO-NE Figure 5-3 Set up Grid Standard Setting the Time. From the previous menu, press ESC to return to the System Parameters menu. Select Time and press ENT. Scroll up/down to select the numerical value, then press ENT to go to next option.
  • Page 81 Choose PV Input working mode. The factory default working mode of the DC input connection and MPP Tracker is set for Independent. Contact CPS if parallel mode is required. PV Input Mode Independent Figure 5-5 Independent Mode Setting...
  • Page 82 Neutral Line Setting. From the previous menu, press ESC to return to the System Parameters menu. Select Neutral Line Setting and press ENT. Use the arrow keys to highlight “Yes” or “No” in regard to whether a neutral conductor is present. Press ENT. This setting will allow the inverter to display L-N voltages on the LCD.
  • Page 83 Choosing the communication data. From the previous menu, press ESC to return to the System Paramters menu. Scroll to Communication Setting and press ENT. Select Baud rate and press ENT. The default setting is 9600. Depending on the data aquasition/SCADA system being used, the baud rate may need to be increased or decreased.
  • Page 84 11. When the LCD screen shows the normal operation status (Figure 5-8) and the “RUN” light on the LED panel is illuminated, this is an indication that the grid connection and power generation are successful. E-T:0.0kWh E-D:0.0kWh PV1:0.0V 0.0A Standby Addr:001 2015-10-22 12：00:00 Figure 5-8 Normal Operation Status 12.

  • Page 85: Main Menu And Operation

    Main Menu and Operation LCD screen displays “default indication interface” when the inverter is in operation mode. Press ESC in this interface to escape the default interface and Press ENT to access the main operation interface. The main operation interface is shown in Figure 6-1. Main Menu Measurement Data Setting...

  • Page 86: Setting

    PV Information Independent PV Input Mode PdcTotal(kW) Vdc(V) Idc(A) P1/4 AC Output L1-N L3-N L2-N V(V) I(A) Main Menu F(Hz) Measurement Data Pac(Kw) Setting P Ref 100.0% Power On/Off PF Ref 1.000 History Record P2/4 Device Information Energy E-Today(kWh) E-Month(kWh) E-Year(kWh) E-Total(kWh) Thdv(L1~L3)
  • Page 87 number. Once all four digits are entered, press the ENT key to confirm the password or Press the ESC key to go back to Setting. Password Please enter Password： 1 1 1 1 Figure 6-3 Input Password Number The Setting menu contains eight submenus: System Parameters, Control Command, Protection Parameters, LVRT/HVRT Setup, Power Derating Setting, Reactive Power Derating Setup, ARC Parameters, and Other Parameters.

  • Page 88: System Parameters

    6.2.1 System Parameters The System Parameter selection contains nine submenus. Language Setting. Two languages, i.e. Chinese and English are available in Language menu. Language setting ENGLISH 中文 Figure 6-5 Language Setting Grid Connection Rule. Multiple grid standards are available. Press to select the corresponding grid standard required for the installation and press the ENT key.
  • Page 89 “Independent" or "Parallel" mode. The inverter is factory set in Independent mode. If this needs to be set to Parallel contact CPS to have this setting changed. Neutral Line Setting. This option allows the user to select “Yes/No”...
  • Page 90 LCD Contrast Setting. Press to increase/decrease the LCD contrast. Press ENT to accept changes. 标题 Figure 6-7 LCD Contrast Grade Setting Clear Running Record. Clear the running information. This contains normal operating information such as when the inverter starts up and shuts down. Clear Fault Record.

  • Page 91: Control Command

    6.2.2 Control Command There are five submenus in the “Control Command” menu: Control Command Control Command Force Restart Time Factory Defaults Vmppt(V) ARC Detect ARC Clear Pmppt(kW) Udc(V) Idc(A) MPPT Scan P2/2 P1/2 Figure 6-8 Control Command Setting Force Restart. If a fault shutdown happens, a severe fault may have occurred inside the inverter.
  • Page 92 ARC Detect. Mannually begin an arc-fault test. The inverter will cease power production and test ARC. Arcing check and protection is mainly divided into two parts, the Arcing check board is responsible for whether there is Arcing in line, and transfer an Arc protection signal to the DSP in the dominating control board.
  • Page 93 MPPT Scan. Mannually execute the MPPT scan. Move the cursor to this item and press the ENT key to initiate the scanning. The LCD screen will skip to normal operation interface if the MPPT scanning succeeds or remain on the MPPT Scan menu interface if the scanning fails.

  • Page 94: Protect Parameters

    6.2.3 Protect Parameters This interface is used to display and set the Protect parameters of the AC grid voltage, frequency and recovery, etc, as shown in Figure 6-9. Grid Over Voltage Protection Grid Under Voltage Protection 110.00% 88.00% GridVolMax1 GridVolMin1 Enable Enable VolMaxTripT1(S)
  • Page 95 Table 6-1 Protection Parameters (IEEE1547, Rule21, and ISO-NE) Grid Voltage Protection Setting Range IEEE1547 Rule21 ISO-NE Parameter Description name (Threshold Value of) Default Default Default Level 1 Max. grid GridVoltMax1 110.00 voltage VoltMaxTripTi Level 1 Max. grid trip 12.5 2.00 me1(S) voltage Level 2 Max.
  • Page 96 Table 6-2 Protection Parameters (IEEE1547, Rule21, and ISO-NE) Cont'd Grid Frequency Protection Setting Range IEEE1547 Rule21 ISO-NE Parameter name Description Default Default Default 60.50 60.5 61.2 GridFrqMax1 Protection threshold value of Level 1 Max. grid frequency FrqMaxTripT1(S) Trip time of Level 1 299.5 299.50 Max.
  • Page 97 Table 6-3 Protection Parameters (IEEE1547, Rule21, and ISO-NE) Cont'd Grid Recovery Setting Range IEEE1547 Rule21 ISO-NE Parameter name Description Default Default Default Recovery Max VoltMax threshold of grid 107.92 107.99 108.00 voltage protection Recovery Min VoltMin threshold of grid 90.08 90.00 voltage protection Recovery time of grid...
  • Page 98 Table 6-4 Protection Parameters (IEEE1547, Rule21, and ISO-NE) Cont'd Grid Voltage Balance Setting Range IEEE1547 Rule21 ISO-NE Parameter name Description Default Default Default Threshold value of GridVolBalance grid voltage 0.01 0.01 0.01 imbalance PhaseLoseCoeff PhaseLoseCoeff 30.0 30.0 30.0 （%） PhaseLoseRcvCoeff PhaseLoseRcvCoeff 30.0 30.0...

  • Page 99: Lvrt/Hvrt Parameters

    6.2.4 LVRT/HVRT Parameters LVRT/HVRT” is used to set the LVRT and HVRT parameters. Move the cursor to this item and press the ENT key to set the parameters. There are 7 pages of LVRT/HVRT parameter settings. These can be changed in the menu tree or by the LVRT (Figure 6-11) and HVRT (Figure 6-12) graphs.
  • Page 100 Through * r a Trip Time/S 2 4 6 8 10 12 14 16 18 20 22 Figure 6-11 The LVRT Curve 1.25 Through * r a 1.15 5，6,7,8 Trip 1.05 Time/S 2 4 6 8 10 12 14 16 18 20 22 Figure 6-12 The HVRT Curve...
  • Page 101 Table 6-5 LVRT Parameters (IEEE1547, Rule21, and ISO-NE) LVRT Setting Range IEEE1547 Rule21 ISO-NE Parameter Description Name Default Default Default LVRTVolt Threshold value of Low voltage (1,2) ride through (1 & 2 point) LVRTTime Time of Level Low voltage ride 1.20 1.20 0.16...
  • Page 102 Table 6-6 HVRT Parameters (IEEE5147, Rule21, and ISO-NE) HVRT Setting Range IEEE1547 Rule21 ISO-NE Parameter Description Name Default Default Default HVRTVolt Threshold value of high voltage (1,2) ride through (1 & 2 point) HVRTTime Time of Level high voltage ride (1,2) through (1 &...
  • Page 103 Table 6-7 LVRT and HVRT Parameters (IEEE5147, Rule21, and ISO-NE) Grid Frequency Protection Setting Range IEEE1547 Rule21 ISO-NE Parameter Description Name Default Min Default Default 0: Disable 1: Enable, no reactive power LVRTModeSett output 2: Enable, reactive power output Threshold value of LOW LVRTTripVolt voltage trip LVRTPstReacti...

  • Page 104: Power Derating Setup

    6.2.5 Power Derating Setup “Power Derating Setup” menu is used to set the active power derating parameters including Active Power Derating, Over frequency derating, Low frequency derating, High temperature frequency derating, etc. The parameters are shown in Figure 6-13. Power vs Grid Voltage 110.00% OvrVoltTrip Disable...

  • Page 105: Reactive Power Derating Setup

    Table 6-8 Power Derating Setup Grid Over Frequency Setting Range Derating IEEE1547 Rule21 ISO-NE Parameter Name Description LCD Display Default Default Default Grid overvoltage VwcurveV1 derating starting voltage V1 Grid overvoltage VwcurveP1 derating starting power P1 Grid overvoltage VwcurveV2 derating end voltage Grid overvoltage VwcurveP2 derating end power...
  • Page 106 IEEE1547 Rule21 ISO-NE Parameter Name Description Default Default Default LCD Display Over frequency derating OvrFrqDeratingM enable/disable 0: Disable 1: Enable The control mode of active power CtrMode 0: Disable dispatch 1: Remote dispatch 2: Local control Local electric Percentage dispatch Active Power setting value 6.2.6 Reactive Power Derating Setup The Reactive Power Derating menu is used to set the Grid reactive power...
  • Page 107 Table 6-9 Reactive Power Control (IEEE-1547, Rule21, and ISO-NE) Grid Reactive Power Setting Range Derating Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Default PFCurveP1 Power of PF(P) Curve point 1 （%） PF of PF(P) Curve point -1.0, 0.8, -1.0, 0.8, -1.0, 0.8,...
  • Page 108 Inductive (PFCurveP1,PFpCurvePF1) (P%) -0.8 (PFCurveP2,PFpCurvePF2) Capacitive Figure 6-15 PF(P) Curve Mode INSTRUCTION: The PF (P) Curve function is only available for IEEE-1547 and Rule21 grid standards.
  • Page 109 Q(U) Curve：Q(U) curve mode. Using the curves to set the reactive power setpoints (See Figure 6-16). The reactive power compensation changes according to the grid voltage. These functions are only available for IEEE-1547 and Rule21 grid standards. Q (%) ( QuCurveU 2 i , QuCurveQ 2 i ) Inductive ( QuCurveU 1 , QuCurveQ 1 )
  • Page 110 Table 6-10 Reactive Power Control (IEEE-1547, Rule21, and ISO-NE) Grid Reactive Power Setting Range Derating IEEE1547 Rule21 ISO-NE Parameter Description name Default Default Default QuCurveU1 Voltage of Q(U) Curve point 107.9 103.3 107.99 QuCurveQ1 Reactive power of Q(U) Curve point 1 QuCurveU2 Voltage of Q(U) Curve point QuCurveQ2...

  • Page 111: Arc Parameters

    6.2.7 Arc Parameters ARC Parameters is used to enable/disable the ARC function and set the ARC parameters. These settings are only to be changed by CPS personnel with approval from the AHJ. Setting ARC Bandwith Setting System Parameters Disable ARCEnable...
  • Page 112 Table 6-11 Other Parameters Other Parameters Setting Range Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Min Default PowerOnDelay Startup delay time 1200 1200 1200 ReactivePower 25.0 25.0 25.0 Reactive Step 100.0 100.0 100.0 Step（%） ErrSoftStartP Power startup step 0.01 0.16 0.01 0.01...
  • Page 113 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Min Default The dynamic GFCIDynProFa trigger coefficient ctor of Leakage current Maximum DCI 2.50 2.50 0.50 DCIProtection1 0.01 0.01 0.01 value1 DCIProtectionT Trip time 1 of DCI 1 (s) DCIProtection2 Maximum DCI 5000...
  • Page 114 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Min Default Island enable/disable Island Protect control 0: Disable 1: Enable Fan detection enable/disable Fan Detect control 0: Disable 1: Enable Operating OperationOver overvoltage protection value The parameter of 15.000 15.000 15.000...

  • Page 115: File Export (Local)

    NOTICE: Compatibility among the functions For the Reactive Pwer Control Mode, only one of these four functions can be valid at one time: QU, PF(P), PF, and Q setting. 6.2.9 File Export (local) File Export is used to export the data including Running History and Fault Record to a flashdrive.

  • Page 116: Automatic Turn On/Off

    6.3.2 Automatic Turn ON/OFF The inverter will start up automatically when the output voltage and power of PV arrays meet the set value, AC power grid is normal, and the ambient temperature is within allowable operating range. The inverter will be shut down automatically when the output voltage and power of PV modules are lower than the set value, the AC power grid fails, or the ambient temperature exceeds the normal range.

  • Page 117: Device Information

    Current Error Date Time Fault 2015/10/22 12:20:08 ArcboardErr 2015/10/22 12:20:08 Fault0040 Fault0040 2015/10/22 12:20:08 Fault0040 2015/10/22 12:20:08 Fault0040 2015/10/22 12:20:08 History Record P1/1 Current Error Running Record Running Record Date Time Event Fault Record 15/10/22 12:20:08 Fault Standby 15/10/22 12:20:08 Running 15/10/22 12:20:08 Standby...

  • Page 118: Start-Up

    This menu provides the information to identify the version of boards in the inverter, model number, serial number and data logger information. This information may be required when contacting CPS service. WARNING: Please follow the guidelines below before on-grid operation to eliminate possible dangers and to ensure safety.

  • Page 119: Shut-Down

    Manual Power ON/OFF: Manual Power ON/OFF is required after regulation setting or manual (fault) shut-down. Press ESC to and ENT to access the Main Menu, move the cursor to “ON/OFF” and press ENT. Once in the “ON/OFF” submenu, move the curser to “ON” and press ENT to start the inverter.

  • Page 120: Operation Mode

    Errors and reference the “Troubleshooting” table in section 7 to determine the cause of the error. 6.9 Grid-tied Power Generation The CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 series inverters have an automatic grid-tied power generation process. It will check constantly whether AC power grid meets the conditions for grid-tied power generation, and test whether the PV array has adequate energy.

  • Page 121: Firmware Upgrade

    Copy the LCD firmware file and the DSP firmware file into the USB flash drive. The upgrade file needs to be placed in the root directory. Contact CPS service for the latest firmware files. Insert the USB flash drive into USB port on the inverter’s...
  • Page 122 485_GND RS485_B- RS485_A+ 485_GND 12VGND +12V RS485_B- RS485_A+ 12VGND +12V USB Port Figure 6-21 USB Port for Firmware Upgrades Using the password to enter the Setting menu and select Firmware Update. Choose the firmware to be updated (LCD or DSP) and follow the promts on the screen.

  • Page 123: Fault Shutdown And Troubleshooting

    Firmware Update LCD firmware DSP firmware UPGRADE FIRMWARE OK, PLEASE Main Menu WAIT! Measurement Data Setting Power On/Off History Record Device Information Please Confirm UPGRADE FIRMWARE FAILURE,PLEASE Setting WAIT! System Parameters Control Command Protection Parameters LVRT/HVRT Setup Power Derating Setup Reactive Power Derating Setup ARC Parameters P1/2...

  • Page 124: Lcd Fault And Troubleshooting

    Table 7-1 Troubleshooting of LED Lights LED fault status Solutions Turn off the external AC breaker Switch the DC switch to “OFF” Neither the “Power” position LED nor the LCD screen lights up. Check the PV input voltage and polarity Turn off the external AC breaker Switch the DC switch to “OFF”...
  • Page 125 Table 7-2 LCD Troubleshooting WARNING Type Error/State Fault Description / Instruction When the inverter is displaying "ExtFanErr" and the output power of the inverter is greater than 50% of it's rated output, do the following: If the fan is spinning --> Replace the inverter because the sensing circuit has a problem.
  • Page 126 Table 7-3 LCD Troubleshooting ALARM Type Error/State Fault Description / Instruction Definition: Prompt detection of abnormal temperature Possible causes: Temperature Sensor socket connecter has poor contact TempSensorErr Temperature Sensor is damaged Recommended solutions: Observe temperature display Switch off exernal AC disconnect, then back on to reboot the system;...
  • Page 127 Table 7-4 LCD Troubleshooting PROTECTION Type Error/State Fault Description / Instruction Restart inverter by turning both AC and DC Protect0090 switches off. Wait for 1 minute for all energy to (Bus over voltage) discharge and turn both switches ON If inverter cannot clear fault, replace inverter Raise limit of IDCmax (for example, 400mA) to allow inverter more room to adjust in transient Protect0070...
  • Page 128 Protect0100 for 1 minute for all energy to discharge and turn both switches (The sensor fault of leakage current) If inverter cannot clear fault, contact CPS Service to replace Filt board or inverter. Turn DC Switch OFF PVxReverse Open Fuse holders to isolate PV strings...
  • Page 129 Check logic connector to Arc board is secure. Run Arc Fault Test from “Settings” Menu ARC Protect If Alarm re-occurs, contact CPS Service to replace arc board or wiring box Check logic connector to Arc board is secure. Run Arc Fault Test from “Settings” Menu...
  • Page 130 Table 7-7 LCD Troubleshooting FAULT Type Error/State Fault Description / Instruction Restart inverter by turning both AC and DC switches Fault0020 OFF. Wait for 5 minutes for all energy to discharge and (Bus over volt turn both switches ON Hardware) If inverter cannot clear fault, replace inverter Restart inverter by turning both AC and DC switches OFF.

  • Page 131: Maintenance And De-Installation

    WARNING: All the installation and wiring connections should be performed by qualified technical personnel. Disconnect the inverter from PV modules and the AC supply before undertaking maintenance. Do not operate or maintain the inverter until at least 5 minutes after disconnecting all sources of DC and AC.

  • Page 132: Clean The Air Vent Grate

    8.1.2 Clean the Air Vent Grate The inverter can become hot during normal operation. It uses built in cooling fans to provide sufficient air flow and help in heat dissipation. Check the air vent grate regularly to make sure it is not blocked. Clean the grate with a soft brush or vacuum cleaner attachment if necessary.
  • Page 133 Figure 8-1 Replacing Cooling Fans...

  • Page 134: Replace The Inverter

    DANGER: Disconnect the electrical power sources in strict accordance with the following steps. Otherwise, the inverter will be damaged and the service personnel’s life will be endangered. 8.1.4 Replace the Inverter Please confirm the following items before replacing the inverter: The AC breaker of inverter is turned off.
  • Page 135 Use a No. 3 Phillips head screwdriver to unscrew the 2 screws on both sides of the inverter. Figure 8-3 Remove the screws on both sides Use a No. 10 Hex wrench to remove the 4 screws between the inverter and the wiring box. Lift the inverter enclosure and disconnect from the wiring box.
  • Page 136 If the replacement inverter is onhand and to be installed immediately, skip this step and refer to section 3.2 for installation of the inverter. Otherwise, use a No. 2 Phillips head screwdriver to remove the 2 screws on the left side of the wiring box, and remove the bulkhead cover.

  • Page 137: D E - Installing The Inverter

    8.2 De-installing the Inverter De-install the inverter and wire box assembly according to the following steps when the inverter needs to be removed: Turn off the external AC breaker and/or system disconnect switch using lock-out/tag-out procedures. Turn off the external DC breaker and/or disconnect switch, if present, and use lock-out/tag-out procedures.

  • Page 138: Accessories

    Accessories The CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 inverters have several optional accessories that allow the inverter to support a wide range of real-world applications. 9.1 Fuse Bypass Terminals (50/60 Kit, Product Code 1.0107.0131) The Fuse Bypass Terminals allow for a reduction in the number of DC homeruns by combining the PV source circuits outside of the inverter wirebox and terminating with one pair of DC inputs to each of the three MPPTs.
  • Page 139 Figure 9-2 Remove Plastic Touchsafe Figure 9-1 Remove Wirebox Cover Finger Guards...
  • Page 140 Figure 9-3 Bypass Terminals Installed Figure 9-4 Bypass Terminals Installed on POS Input on NEG Bus...

  • Page 141: Shade Cover (Ssc-60St)

    Field testing at PVEL showed up to 15% reduction in operating temperatures of inverters with shade covers installed in direct sunlight. This report can be found on the CPS America website under application notes. https://www.chintpowersystems.com/downloads/application- notes/PVEL-Field-Testing-Report-28kW-Inveter-Shade-Plate.pdf...

  • Page 142: Y-Comb Terminal Block (Optional)

    9.3 Y-Comb Terminal Block (Optional) The Y-Comb is intended for use in the SCA50/60KTL-DO/US-480 inverters. This accessory is applied between two adjacent fuseholders within the inverter wire-box and distributes current between the two fuseholders. When products such as Y-branch connectors are used in the array field to combine the output of two strings the current is as much as 30 or 40A.

  • Page 143: Technical Data

    10 Technical Data 10.1 Datasheet Model Name CPS SCA50KTL-DO/US-480 CPS SCA60KTL-DO/US-480 DC Input Max. PV Power 90kW (33kW per MPPT) 90kW (33kW per MPPT) Max. DC Input Voltage 1000V Operating DC Input Voltage 200-950V Range Start-up DC Input Voltage / Power...
  • Page 144 Display and Communication User Interface and Display LCD + LED Inverter Monitoring Modbus RS485 Site Level Monitoring CPS FlexOM Gateway (1 per 32 inverters) Modbus Data Mapping Remote Diagnostics / FW Standard / with FlexOM Gateway Upgrade Functions Mechanical Data Dimensions (WxHxD) 39.4 x 23.6 x 10.24 in.

  • Page 145: Measurement Tolerances

     nominal power ±3% for real-time measurements with output power above 20%  nominal power ±4% for all statistical data  CPS inverter tolerances are specified below: Voltage tolerances: ±1%  Current tolerances: ±2%  Frequency tolerances: ±0.5%  Power tolerances: ±3% ...

  • Page 146: Production Graphs

    10.3 Production Graphs The following sections illustrate the inverter production/derating in terms of ambient temperature, altitude and grid voltage. 10.3.1 High Temperature Derating Graph When the ambient temperature is higher than 113℉ (45℃), the inverter output power (Pn) will begin to derate, as shown in Figure 10-1: Pin/Pn 100% -3%/℃...

  • Page 147: Altitude Derating Graph

    10.3.2 Altitude Derating Graph When the altitude is higher than 9842.5ft (3000m), the rated output power (Pn) of the inverter will decrease, as shown in Figure 10-2: Pin/Pn 100% -30%/km 3000 4000 Altitude(m) Figure 10-2 SCA50/60KTL Derating Curve with High Altitude...

  • Page 148: Grid Voltage Derating Graph

    10.3.3 Grid Voltage Derating Graph When the Volt-Watt function is disabled, and grid voltage is within 100%~110% (Un ~ 1.1*Un) of the Rated Output Voltage, the inverter output power (Pn) may reach 100%. When the grid voltage is lower than the Rated Output Voltage, the inverter will limit the AC Output Current and the output power (Pn) will begin to derate, as shown in Figure 10-3.
  • Page 149 110% 100% 0.8%/V 100 200 300 400 500 600 850 950 1000 PV Voltage (V) Figure 10-4 CPS SCA60KTL derating curve of PV input voltage 110% 100% 0.8%/V 100 200 300 400 500 600 850 950 1000 PV Voltage (V)

  • Page 150: Reactive Power Capability

    The Reactive Power Overload function is disabled by factory default (Max. AC Apparent Power is 50/60kVA and Max. AC Output Current is 60.2A/72.2A). Contact CPS Customer Service if you want to enable the function. Figure 10-6 SCA50/60KTL Reactive Power Capability...

  • Page 151: Limited Warranty

    The warranty policy of this product is specified in the contract; otherwise, the standard warranty is 10 years. For service, Chint Power Systems America will provide local support. For Warranty terms, please refer to the CPS America standard warranty policy in place at time of purchase. CHINT POWER SYSTEMS AMERICA CO., LTD.

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