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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 SCA25KTL-DO/US-208
CPS SCA50KTL-DO/US-480
And SCA60KTL-DO/US-480
Installation and Operation Manual - Rev3.4
CHINT POWER SYSTEMS AMERICA CO.
Revision 3.4 - May 2020

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  • Page 1 CPS SCA Series Grid-tied PV Inverter CPS SCA25KTL-DO/US-208 CPS SCA50KTL-DO/US-480 And SCA60KTL-DO/US-480 Installation and Operation Manual - Rev3.4 CHINT POWER SYSTEMS AMERICA CO. Revision 3.4 - May 2020...
  • 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, Trouble-Shooting, Accessories 3, 5, 6, 10 Feb 2018 Increased kVA Ratings Mar 2019 Allow MPPT to be Unbalanced...
  • Page 4 3.3.5 Change AC terminal description. Delete wiring box bottom seal description. 3.4.1 Modify the communication board description. Add ISO-NE regulation Update partial settings 10.1 Update datasheet 10.3.3 Update 10.3.3 chapter curve and description Add CPS SCA25KTL-DO/US-208 August model description. 2020...

  • Page 5: Table Of Contents

    Table of Contents BEFORE YOU START… ................1 IMPORTANT SAFETY INSTRUCTIONS..........3 OVERVIEW ..................8 ............8 NVERTER FOR GRID TIED SYSTEMS ................8 RODUCT EATURES ..........10 RODUCT ROTECTION AND UNCTIONS ): ........10 MART NVERTER UNCTIONS DEFAULT STATE ...........
  • Page 6 3.3.4 AC and Ground Connection ..........50 3.3.5 AC Connections ..............53 ............58 OMMUNICATION ONNECTION 3.4.1 Description of the Communication Board ......59 3.4.2 RS485 Communication ............59 3.4.3 RS485 Network Set-up ............60 3.4.4 Communication Wiring ............62 USER INTERFACE ................
  • Page 7 ON/OFF ................120 OWER 6.3.1 Manual Power ON/OFF............120 6.3.2 Automatic Turn ON/OFF ............ 120 ................120 ISTORY ECORD ............... 121 EVICE NFORMATION ..................122 TART .................. 123 ................123 PERATION ............124 TIED OWER ENERATION 6.10 F ............... 124 IRMWARE PGRADE FAULT SHUTDOWN AND TROUBLESHOOTING ......
  • Page 8 TECHNICAL DATA ................. 145 10.1 ................145 ATASHEET 10.2 ............148 EASUREMENT OLERANCES 10.3 ..............149 RODUCTION RAPHS 10.3.1 High Temperature Derating Graph ........149 10.3.2 Altitude Derating Graph ............ 150 10.3.3 Grid Voltage Derating Graph ..........151 10.3.4 Reactive Power Capability ..........153 LIMITED WARRANTY ..............

  • Page 9: 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 SCA 25 KTL-DO/US-208、 CPS SCA50KTL-DO/US-480 and CPS SCA 60KTL-DO /US- 480 3-Phase String Inverters. Here after in this manual this equipment may be referred to simply as the inverters.
  • Page 10 Installation, commissioning, troubleshooting, and maintenance of the inverter must be done only by qualified personnel. Thank you for choosing a CPS SCA 25 KTL-DO/US-208、CPS SCA 50KTL- DO/US-480 or CPS SCA60KTL-DO/US-480 3-Phase String Inverter. These PV Inverters are high performance and highly reliable products specifically designed for the North American Solar market.

  • Page 11: 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 12 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 13 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...
  • Page 14 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. Risk of electric shock and fire. Use only with PV modules that have a maximum system voltage of rating of 1000V or higher.
  • Page 15 CAUTION: CPS SCA 25 KTL-DO/US-208、CPS SCA50KTL-DO/US-480 and SCA60KTL-DO/US-480 inverters weigh approximately 56kg (123.5 pounds). wirebox portion weighs approximately 15kg (33 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.

  • Page 16: Overview

    Overview Inverter for grid-tied PV systems CPS SCA 25 KTL-DO/US-208、CPS SCA50KTL-DO/US-480 and SCA60 KTL- 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 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 Flex Gateway to ensure compatibility with 3rd party monitoring and control systems.

  • Page 18: Product Protection And Functions

    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. Product Protection and Functions ...

  • Page 19: Appearance And Main Item Description

     Fixed Power Factor – deactivated  Reconnect by “Soft-Start” Methods – activated  Frequency-Watt – activated Volt-Watt – activated   Set Active Power Function Mode (Optional) – activated under mutual agreement  Dynamic Reactive Power Support Mode (Optional) – activated under mutual agreement Appearance and Main Item Description 5 6 7...

  • Page 20: Schematic Diagram And Circuit Design

    ⑨ AC switch: AC power on/off Schematic Diagram and Circuit Design The basic electrical schematic diagram of the CPS SCA50/60KTL-DO/US-480、CPS SCA 25 KTL-DO/US-208 3-Phase String Inverters are shown in Figure 2- 、 Figure 2- and Figure 2-. The input from PV...
  • Page 21 This rapid shutdown system has been tested and certified with the Tigo TS4-A-F and TS4-A-2F platform to conform to 690.12 of the 2017 National Electric Code. CPS SCA50/60KTL-DO/US-480 Wirebox have two models，One is the standard version of the machine, another machine is a rapid Shutdown (RSD) Wirebox equipped with APS or Tigo products.
  • Page 22 Figure 2-4 CPS SCA50/60KTL-DO/US-480 Inverter Schematic, Rapid Shutdown (RSD) Wirebox WIRE BOX INVERTER POWER HEAD AC/DC Power Transmitter Supply Fuses DC Switch MPPT1 PV1+ PV1+ PV1- PV1- Switch Output Type Ⅲ MOV DC SPD PV1+ MPPT2 PV2+ PV2+ PV2- PV2-...

  • Page 23: Anti-Islanding Detection

    Anti-Islanding Detection The SCA25KTL-DO/US-208、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-2018. 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 APS、Tigo TS4-A-F/2F (module/rack mounted MLPE) and smart modules integrated with the APS、TS4-A-F/2F in...

  • Page 25: Installation

    Installation This chapter describes the planning and installation procedures for the SCA25KTL-DO/US-208、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 Q’ty Item 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

    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 standard chosen.
  • 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 (e) Do not mount the inverter upside down. Shade cover Figure 3-2 Inverter Mounting Options...

  • Page 32: 3.2.3 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 ≥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 34 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: 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 37 (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 supplied with the Accessory Kit. Figure 3-7 and Figure 3-8.
  • Page 38 Figure 3-10 and mount it onto the bracket. CAUTION: The main enclosure of the CPS SCA25KTL-DO/US-208、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 39 Figure 3-9 Mount the Main Enclosure on the Bracket by Lifting Sling Figure 3-10 Grab Handle Position...
  • Page 40 Step 3 Install the wirebox: Remove the cover plate at the bottom of the main enclosure. Tool required: No. 2 Phillips head screwdriver Remark: the covers shown below do not have waterproof function. Figure 3-11 Main Enclosure Cover Plate Remove screws securing the bulkhead cover at the top of the wirebox –...
  • Page 41 inverter enclosure. Covers may be required in the future if an inverter or wirebox is to be removed during servicing (see step 6, Figure ). Tool required: No.2 Phillips head screwdriver 3-15 Step 4 Secure the wirebox to the main enclosure by using the M6x18 screws (4pcs) to fasten the wirebox.
  • Page 42 Figure 3-14 Secure the Main Enclosure and Wiring Box to the Bracket 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...
  • Page 43 Step 9 Optional - Install an anti-theft padlock when the installation is complete. The anti-theft padlock is used to prevent the inverter from being stolen when the equipment is installed outdoors. The inverter may be locked to the bracket ( Step 10 Figure 3-16 Figure 3-16 Location of the Anti-Theft Padlock...

  • Page 44: Electrical Installation

    An MS 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...
  • Page 45 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 46: 3.3.2 Wiring Boxes

    3.3.2 Wiring Boxes 19.29in(490mm) 17.83in(453mm) 16.34in(415mm) 12.05in(306mm) 8.97in(228mm) 5.90in(150.00mm) 0.32in(8mm) DC INPUT COMM. PORT 4.29in(109mm) AC OUTPUT 2.87in(73mm) 4.29in(109mm) 2.87in(73mm) 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.
  • Page 47 (i.e. when use of 2 inch or 2-1/2 inch Trade Size is required) ④ External ground connection point (M6) Figure 3-21 Internal Connection Points within the Standard wirebox （only for CPS SCA50/60KTL-DO/US-480） Figure 3-22 Internal Connection Points within the RSD wirebox （only for CPS SCA50/60KTL-DO/US-480）...

  • Page 48: Dc Connection

    Figure 3-23 Internal Connection Points within the RSD wirebox （only for CPS SCA25KTL-DO/US-208） 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 Rapid Shutdown transmitter 3.3.3...
  • Page 49 power measurement; if the PV power increases, further voltage adjustments in that same direction are performed until the PV power no longer increases. INSTRUCTION: PV input power from the array may be unbalanced between the three MPPT zones, however every effort should be made to design within one string count difference.
  • Page 50 Parallel Mode is not preferred since it affects the sensitivity of the 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.
  • Page 51 Contact CPS Customer Service for further information. Select the DC conductor size and material for the inverters according to the following configuration table: Table 3-5 DC Terminal Specifications Terminal Acceptable wire range DC input Copper only) when terminating to #12-8AWG ( 75/90℃...
  • Page 52 Y branch connectors are used with DC field wiring to reduce PV source circuit home runs. CPS allows replacement of the factory installed 15A fuses with appropriate ampere ratings, however CPS does not provide nor stock these fuses.
  • Page 53 Any damage resulting from use of incompatible fuses is not covered by the CPS warranty. NOTICE: Note 1: The temperature rating of the PV Source circuit conductors should be no less than 90° C (194° F).
  • Page 54 The negative (-) terminal of the conductor should match the negative (-) terminal of inverter’s DC input. NOTICE: It is important to use a multi-meter to check the polarity of the DC source circuit conductors to avoid any risk of reverse polarity. WARNING: A reversed string is not protected by the inverter and can cause severe damage to equipment and personnel.
  • Page 55 Table 3-7 DC Fuse Holder Torque Value by Manufacturer Sinofuse Mersen (Ferraz Shamut) USM1 Single Conductor Specified Single Conductor Specified Torque: Torque: 6-14AWG:26.55in-lbs(3.0N.m) 6-14AWG: 26.55in-lbs (3.0 N.m) WARNING: Failure to apply proper torque to the fuse holder terminals may result in an improper conductor termination and cause excessive heat or fire.
  • Page 56 DC INPUT COMM. PORT AC OUTPUT  For more details please see the user manual. WARNING: High touch current . Earth connection essential before connecting supply. Figure 3-25 DC Input connection Table 3-8 Tools Required for Cable Termination Tools Remark #2 Phillips head screwdriver Torque value: 3 N.m (26.55in-lbs) Terminate at fuseholders.
  • Page 57 Figure 3-26. See Section 9 Accessories for installation information. Figure 3-26 Bypass Terminal option installed within the Standard wirebox （Only for CPS SCA50/60KTL-DO/US-480） Before terminating the PV conductors, verify connector specifications (Table 3-9) and always verify polarity to avoid risk of reverse polarity.

  • Page 58: Ac And Ground Connection

    /Wye output. If another voltage/configuration is required a transformer may be necessary. Wye (Inverter) / DELTA (Utility) Wye (Inverter) / WYE (Utility) INVERTER INVERTER TRANSFORMER TRANSFORMER PER CODE PER UT ILITY REQUIREMENTS PER CODE OPTIONAL PER CPS OPTIONAL PER CPS...
  • Page 59 NOTE: If the transformer neutral is not NOTE: If the transformer neutral is not connected to ground, additional ground connected to ground, additional ground fault detection must be added external to fault detection must be added external the inverter per NEC 250.21 to the inverter per NEC 250.21 In a Delta connected system, the inverter does not detect AC Side...
  • Page 60 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 the responsibility of the system designer to determine and take in account the reliability of the transformer or other system parameters.

  • Page 61: 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 No. 2 Phillips head screwdriver 3 N.m (26.55in-lbs Using the 1-1/2 inch openings. Remove the liquid-tight hole plug from the right side or bottom of the AC input portion of the wiring box to install 1-1/2 inch Trade Size conduit and conduit fittings into the hole.
  • Page 62 Grounding/Bonding. The inverter provides 1 grounding connection on the AC side and one bonding location. These configurations are illustrated below Figure 3-29). (a) Grounding via the ground busbar (left) [1] This is required for grounding the equipment by running the EGC with the ungrounded conductors.
  • Page 63 Table 3-11 Torque and Conductor Specifications Connection Point Conductor Range Torque Value L1/L2/L3: 3 -3/0AWG(75/90 ℃ AC output terminal 2 - 3/0AWG (90 ℃ 14.25 N-m (126 in-lbs） block 1 - 3/0AWG (75℃ 75/90 N: 8 - 3/0AWG ( CU/AL) 5.65 N-m （50 in-lbs）...
  • Page 64 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 65 DC INPUT COMM. PORT AC OUTPUT  For more details please see the user manual. WARNING: High touch current . Earth connection essential before connecting supply. Figure 3-31 External Ground Point Location of wirebox NOTICE: Always connect the Ground conductor (EGC) before terminating any of the AC conductors.

  • Page 66: Communication Connection

    Table 3-12 Specification of AC Breaker Selection Inverter Min AC OCPD Max AC OCPD CPS SCA25KTL-DO/US-208 100A 125A CPS SCA50KTL-DO/US-480 110A CPS SCA60KTL-DO/US-480 100A 125A Communication Connection CPS SCA25KTL-DO/US-208、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...

  • Page 67: Description Of The Communication Board

    Figure 3-33 Communication Connection Interfaces 3.4.2 RS485 Communication CPS recommends the following cable for inverter RS485 communications: UTP CAT-5e or (3) 18-22AWG communication cables. It is recommended that industrial grade shielded RS485 cable be used in lieu of unshielded twisted pair. Communication cable such as (CAT5) or Belden 3106A cable for RS485 5 pin connector is preferred.

  • Page 68: Rs485 Network Set-Up

    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). 485_GND 485_GND RS485_B- RS485_B- RS485_A+ RS485_A+ 12VGND 12VGND +12V +12V Figure 3-34 RS485 Connection of Communications Board 3.4.3 RS485 Network Set-up When the inverters are monitored via the RS485 communication, a unique...
  • Page 69 Datalogger S402 S402 S402 Figure 3-35 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 70: 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 71: User Interface

    User Interface This section is intended to orient the user with the inverter interface prior to turning the system on and commissioning. 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 72 Table 4-1 LED Indication Name Status Indication light Working Light on Energized (control panel starts to work) POWER power Light off Power supply not working light Light on In grid-tied power generation state Grid-tied Derated running status (light up 0.5s, operation Flash light off 1.6s)

  • Page 73: 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 74: Interface Types

    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 75 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 76: 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. Mechanical Installation check ...

  • Page 77: Commissioning Steps

    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 78 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 79 HECO-HM HECO-ML HECO-ML ISO-NE On the right Only for CPS SCA50/60KTL-DO/US-480 On the left Only for CPS SCA25KTL-DO/US-208 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 80 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 Neutral Line Setting. From the previous menu, press ESC to return to the System Parameters menu.
  • Page 81 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 82 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. If the inverter fails to operate normally, the “FAULT” light will illuminate and the fault menu will be displayed. Select Current Error and press ENT to access the current faults the inverter has recorded. This information will show on the LCD screen as shown in the Figure 5-9.

  • Page 83: 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.

  • Page 84: 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 85 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 86: System Parameters

    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. Grid Connection Rule IEEE1547_2003 IEEE1547_2014 CA Rule 21 HECO-HM HECO-ML Only for CPS SCA25KTL-DO/US-208...
  • Page 87 PV Input Mode. This allows the user to read the inverter working mode as “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.

  • Page 88: Control Command

    does not affect the operation of the inverter. When a neutral is installed and “Yes” is selected, the inverter will display L-N measurements. Communication Setting. This interface is used to set the Modbus ID and Baud rate for communication. More information on this is found in the “Commissioning”...
  • Page 89 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. The user can perform a force reboot for one time in this menu if the user needs to restart the inverter.
  • Page 90 board. The control board DSP is responsible for disconnecting the inverter from the grid after receiving the Arc protection signal to ensure safety. The Arc board failure will cause ‘arc board err’ shown on the LCD and it will not connect to the grid until the arc board is OK. If there is an Arc fault, the LCD displays the fault which can only be cleared manually.

  • Page 92: 6.2.3 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 93 Table 6-1 Protection Parameters (IEEE1547 / Rule21 and ISO-NE ) Only for CPS SCA50/60KTL-DO/US-480 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...
  • Page 94 Table 6-2 Protection Parameters (IEEE1547 and Rule21) Only for CPS SCA25KTL-DO-US-208 Grid Voltage Protection Setting Range IEEE1547 Rule21 Description Parameter name (Threshold Value of) Default Default Level 1 Max. grid GridVoltMax1(%) 100.00 110.00 135.00 100.00 110.00 135.00 voltage Level 1 Max. grid trip VoltMaxTripTime1(S) 0.00...
  • Page 95 Table 6-3 Protection Parameters (IEEE1547 /Rule21 and ISO-NE) Cont'd Only for CPS SCA50/60KTL-DO/US-480 Grid Frequency Protection Setting Range IEEE1547 Rule21 ISO-NE Parameter name Description Default Default Default GridFrqMax1 Protection threshold 60.50 60.5 61.2 value of Level 1 Max. grid frequency...
  • Page 96 Table 6-4 Protection Parameters (IEEE1547 and Rule21) Cont'd Only for CPS SCA25KTL-DO-US-208 Grid Frequency Protection Setting Range IEEE1547 Rule21 Parameter name Description Default Default GridFrqMax1(%) Protection threshold 60.00 60.50 65.00 60.00 60.50 65.00 value of Level 1 Max. grid frequency...
  • Page 97 Table 6-5 Protection Parameters (IEEE1547 /Rule21 and ISO-NE) Cont'd Only for CPS SCA50/60KTL-DO/US-480 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...
  • Page 98 Grid Voltage Balance 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 30.0 （%） PhaseLoseVUnbala PhaseLose Voltage 0.01 10.00 100.00 0.01 10.00 100.00 0.01 10.00 100.00 nce（%） Unbalance Phase-PETripVolt The trip voltage of 0.01 45.00 100.00...
  • Page 99 Table 6-6 Protection Parameters (IEEE1547 and Rule21) Cont'd Only for CPS SCA25KTL-DO-US-208 Grid Recovery Setting Range IEEE1547 Rule21 Parameter name Description Default Default Recovery Max VoltMax(%) threshold of grid 80.00 108.00 135.00 80.00 108.00 135.00 voltage protection Recovery Min VoltMin(%) threshold of grid 20.00...

  • Page 100: Lvrt/Hvrt Parameters

    imbalance PhaseLoseCoeff PhaseLoseCoeff 30.0 30.0 （%） PhaseLoseRcvCoeff PhaseLoseRcvCoeff 30.0 30.0 （%） PhaseLoseVUnbala PhaseLose Voltage 0.01 10.00 100.00 0.01 10.00 100.00 nce（%） Unbalance Phase-PETripVolt The trip voltage of 0.01 45.00 100.00 0.01 45.00 100.00 （%） Phase-PE Phase-PERcvVolt The recovery voltage 0.01 35.00 100.00 0.01...
  • Page 101 Through Trip Time/S 2 4 6 8 10 12 14 16 18 20 22 Figure 6-11 The LVRT Curve 1.25 Through 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 102 Table 6-7 LVRT Parameters (IEEE1547 / Rule21 and ISO-NE) Only for CPS SCA50/60KTL-DO/US-480 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...
  • Page 103 Table 6-8 LVRT Parameters (IEEE1547 and Rule21) Only for CPS SCA25KTL-DO-US-208 LVRT Setting Range IEEE1547 Rule21 Parameter Description Name Default Default LVRTVolt Threshold value of Low voltage 0.00 0.00 100.00 0.00 0.00 100.00 (1,2) (%) ride through (1 & 2 point) 0.00...
  • Page 104 Table 6-9 HVRT Parameters (IEEE5147 / Rule21 and ISO-NE) Only for CPS SCA50/60KTL-DO/US-480 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...
  • Page 105 Table 6-10 HVRT Parameters (IEEE5147 and Rule21) Only for CPS SCA25KTL-DO-US-208 HVRT Setting Range IEEE1547 Rule21 Parameter Description Name Default Default HVRTVolt Threshold value of high voltage 100.00 125.00 135.00 100.00 125.00 135.00 (1,2) (%) ride through (1 & 2 point) 100.00...
  • Page 106 Table 6-11 LVRT and HVRT Parameters (IEEE5147 / Rule21 and ISO-NE) Only for CPS SCA50/60KTL-DO/US-480 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...

  • Page 107: Power Derating Setup

    Table 6-12 LVRT and HVRT Parameters (IEEE5147 and Rule21) Only for CPS SCA25KTL-DO-US-208 Grid Frequency Protection Setting Range IEEE1547 Rule21 Parameter Description Name Default Min Default 0: Disable 1: Enable, no reactive power LVRTModeSett output 2: Enable, reactive power output...
  • Page 108 Power vs Grid Voltage 106.00% VwCurveV1 100.00% VwCurveP1 Disable VwCurveV2 110.00% VwCurveP2 0.0% 10.0% OPenLoopRespT(s) P1/3 Power vs Grid Frequency Setting 60.40 System Parameters OvrFrqMin(Hz) Control Command OvrFrqMax(Hz) 61.50 Protection Parameters OvrFrqSlop(P/s) 0.16% LVRT/HVRT Setup RecovryFrq(Hz) 60.00 Power Derating Setup OvrFrqRecoveryT(S) Reactive Power Derating Setup OvrFrqDeratingMode...
  • Page 109 Table 6-13 Power Derating Setup Only for CPS SCA50/60KTL-DO/US-480 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...
  • Page 110 CtrMode 0: Disable dispatch 1: Remote dispatch 2: Local control Local electric Percentage dispatch Active Power setting value Table 6-14 Power Derating Setup Only for CPS SCA25KTL-DO-US-208 Grid Over Frequency Setting Range Derating IEEE1547 Rule21 Parameter Name Description LCD Display...

  • Page 111: Reactive Power Derating Setup

    OpenloopRespT(s Open loop response 10.0 90.0 10.0 90.0 time The trigger frequency OvrFrqMin (Hz) of Over Frequency 60.00 60.50 72.00 60.00 60.50 72.00 derating The end frequency of OvrFrqMax (Hz) Over Frequency 60.00 61.40 72.00 60.00 61.40 72.00 derating The rate of OvrFrqSlop (P/s) Overfrequency 0.01...
  • Page 112 CtrMode ARC Parameters 0.0% 20.0% QuCurveTriPower Percentage PFSetValue QuCurveUndoPower P1/2 5.0% 1.000 Reserve P3/4 P4/4 Only for CPS SCA25KTL-DO-US-208 PF vs Grid Voltage Reactive Power vs Grid Voltage 50.0% 107.99% PFCurveP1 QuCurveU1 PFpCurvePF1 0.0% 1.000 QuCurveQ1 PFCurveP2 QuCurveU2 100.0% 110.00%...
  • Page 113 Table 6-15 Reactive Power Control (IEEE-1547/ Rule21 and ISO-NE) Only for CPS SCA50/60KTL-DO/US-480 Grid Reactive Power Setting Range Derating Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Default Power of PF(P) Curve PFCurveP1 （ %） point 1 PF of PF(P) Curve point -1.0,...
  • Page 114 PF of PF(P) Curve point -1.0, 0.8, -1.0, 0.8, PFpCurvePF2 -0.900 -0.900 - 0.8 - 0.8 PFCurveTriVolt The trigger voltage of 100.00 100.00 110.00 100.00 100.00 110.00 PF(P)Curve PFCurveUndoV PF curve revocation 90.00 90.00 100.00 90.00 90.00 100.00 olt (%) voltage Note: The PF and Q value can be adjusted by remote software if the “Remote”...
  • Page 115 INSTRUCTION: The PF (P) Curve function is only available for IEEE-1547 and Rule21 grid standards. 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.
  • Page 116 Table 6-17 Reactive Power Control (IEEE-1547 / Rule21 and ISO-NE) Only for CPS SCA50/60KTL-DO/US-480 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)
  • Page 117 0.8, -1.0, 0.8, -1.0, 0.8, PFSetValue Local Power Factor Setting 0.950 -0.8 -0.8 -0.8 Table 6-18 Reactive Power Control (IEEE-1547 and Rule21) Only for CPS SCA25KTL-DO-US-208 Grid Reactive Power Setting Range Derating IEEE1547 Rule21 Parameter Description name Default Default QuCurveU1 Voltage of Q(U) Curve point 100.00...

  • Page 118: Arc Parameters

    -0.8 -0.8 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...
  • Page 119 1.00 P3/6 P4/6 Others Island Protect Enable Fan Detect Enable Disable Pid box 120.00% Enable OperationOverVol Setting VirtualDamping Others Parameters P5/6 Others MPPT1_OptVo1LowLim 200.0 MPPT1_OptVo1UpLim 1000.0 MPPT2_OptVo1LowLim P2/2 200.0 MPPT2_OptVo1UpLim 1000.0 MPPT3_OptVo1LowLim 200.0 1000.0 MPPT3_OptVo1UpLim P6/6 Only for CPS SCA50/60KTL-DO/US-480...
  • Page 120 MPPT1_OptVo1UpLim Enable 1000.0 Disable MPPT2_OptVo1LowLim Pid box 200.0 120.00% Enable OperationOverVol MPPT2_OptVo1UpLim 1000.0 Setting VirtualDamping MPPT3_OptVo1LowLim 200.0 Others Parameters MPPT3_OptVo1UpLim 1000.0 P5/7 P6/7 Others Anti reflux(DSP) Disable Anti reflux(LCD) P2/2 P7/7 Only for CPS SCA25KTL-DO-US-208 Figure 6-18 and Table 6-.
  • Page 121 1.00 P3/6 P4/6 Others Island Protect Enable Fan Detect Enable Disable Pid box 120.00% Enable OperationOverVol Setting VirtualDamping Others Parameters P5/6 Others MPPT1_OptVo1LowLim 200.0 MPPT1_OptVo1UpLim 1000.0 MPPT2_OptVo1LowLim P2/2 200.0 MPPT2_OptVo1UpLim 1000.0 MPPT3_OptVo1LowLim 200.0 1000.0 MPPT3_OptVo1UpLim P6/6 Only for CPS SCA50/60KTL-DO/US-480...
  • Page 122 MPPT1_OptVo1UpLim Enable 1000.0 Disable MPPT2_OptVo1LowLim Pid box 200.0 120.00% Enable OperationOverVol MPPT2_OptVo1UpLim 1000.0 Setting VirtualDamping MPPT3_OptVo1LowLim 200.0 Others Parameters MPPT3_OptVo1UpLim 1000.0 P5/7 P6/7 Others Anti reflux(DSP) Disable Anti reflux(LCD) P2/2 P7/7 Only for CPS SCA25KTL-DO-US-208 Figure 6-18 Other Parameters Setting...

  • Page 123: Other Parameters

    Table 6-19 Other Parameters Only for CPS SCA50/60KTL-DO/US-480 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Min Defaul PowerOnDelay Startup delay time 1200 1200 1200 ReactivePower Reactive Step 25.0 100.0 25.0 100.0 25.0 100.0 Step（%） ErrSoftStartP Power startup step 0.01...
  • Page 124 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Min Defaul The static GFCIStaticT (s) threshold time of 0.20 0.20 0.20 Leakage current The dynamic GFCIDynProFa trigger coefficient ctor of Leakage current Maximum DCI DCIProtection1 0.01 2.50 0.01 2.50 0.01...
  • Page 125 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 ISO-NE Name Default Default Min Defaul e control 0: Disable 1: Enable detection enable/disabl Fan Detect e control 0: Disable 1: Enable Operating OperationOv overvoltage erVol protection value The parameter VirtualDamp of Virtual 15.000 15.000 15.000...
  • Page 126 Name Default Default Min Defaul Mppt3_OptV OptiVoltMaxMp 200.0 1000.0 1500.0 200.0 1000.0 1500.0 200.0 1500.0 1000.0 olUpLim Table 6-20 Other Parameters Only for CPS SCA25KTL-DO-US-208 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 Name Default Default PowerOnDelay Startup delay time...
  • Page 127 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 Name Default Default Rule21 standard. The trigger FaultPowerT temperature of 95.0 95.0 95.0 95.0 95.0 95.0 (℃) module (℃) The trigger FaultEnvT temperature of 83.0 83.0 83.0 83.0 83.0 83.0 (℃) enviroment (℃) The static GFCIStaticValu threshold value of...
  • Page 128 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 Name Default Default temperature Duplication Parameter of Group repetitive （%） control The enabled CtrParaGrou control parameters group. PID Checking PID Cheak enable/disable Setting control Island enable/disabl Island e control Protect 0: Disable 1: Enable detection enable/disabl...
  • Page 129 Other Parameters Setting Range Parameter Description IEEE1547 Rule21 Name Default Default olLowLim(V) Mppt1_OptV OptiVoltMaxMp 200.0 1000.0 1500.0 200.0 1000.0 1500.0 olUpLim(V) Mppt2_OptV OptiVoltMinMp 200.0 200.0 1500.0 200.0 200.0 1500.0 olLowLim(V) Mppt2_OptV OptiVoltMaxMp 200.0 1000.0 1500.0 200.0 1000.0 1500.0 olUpLim(V) Mppt3_OptV OptiVoltMinMp 200.0 200.0 1500.0 200.0 200.0 1500.0...

  • Page 130: Power On/Off

    Power ON/OFF 6.3.1 Manual Power ON/OFF Restarting the inverter is required after regulation setting or manual (fault) shut-down. Press ESC or ENT to access the Main Menu. Scroll the curser down to highlight POWER ON/OFF and press ENT to select. Move the cursor to “ON”...

  • Page 131: Device Information

    Current Error Date Time Fault 2015/10/22 12:20:08 ArcboardErr 2015/10/22 12:20:08 Fault0040 2015/10/22 12:20:08 Fault0040 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 132: 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 133: Shut-Down

    “ON/OFF” submenu, move the curser to “ON” and press ENT to start the inverter. Then the inverter will start up and operate normally if the start-up condition is met. Otherwise, the inverter will go to stand-by mode. Shut-Down Automatic shutdown: The inverter will be shut down automatically when the output voltage and power of PV modules are lower than the set value, AC power grid fails, or the ambient temperature exceeds the normal range.

  • Page 134: Grid-Tied Power Generation

    “Troubleshooting” table in section 7 to determine the cause of the error. 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 135 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 communications board.
  • Page 136 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 137: Fault Shutdown And Troubleshooting

    Fault Shutdown and Troubleshooting If a fault occurs within the system, the inverter will recognize and report via the LED or LCD panel. If this occurs, reference the following section prior to contacting post-sales service. This will ensure the quickest time to resolution possible.

  • Page 138: Lcd Fault And Troubleshooting

    disconnecting all sources of DC and AC. LCD Fault and Troubleshooting The inverter will shut down automatically if the PV power generation system fails, such as output short circuit, grid overvoltage/undervoltage, grid overfrequency/underfrequency, high environmental temperature or internal malfunction of the machine. The fault information will be displayed on the LCD screen.
  • Page 139 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 140 Table 7-4 LCD Troubleshooting PROTECTION Type Error/State Fault Description / Instruction Restart inverter by turning both AC and DC switches off. Wait Protect0090 for 1 minute for all energy to discharge and turn both switches (Bus over voltage) If inverter cannot clear fault, replace inverter Raise limit of IDCmax (for example, 400mA) to allow inverter Protect0070 more room to adjust in transient condition to cope with...
  • Page 141 Wait for 1 minute for all energy to discharge and turn both (The sensor fault of switches ON 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 142 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 143 Raise limit of IDCmax (for example, 400mA) to allow inverter more room to adjust in transient condition to Fault0110 cope with imbalance of impedance and voltage (Bus imbalance) between grid phases If after adjustment, alarm still occurs, replace inverter Restart inverter by turning both AC and DC switches Fault0130 OFF.

  • Page 144: Maintenance And De-Installation

    Maintenance and De-installation This section defines the activities required to properly maintain the inverter and must be facilitated by qualified personnel, trained in the installation, de-installation and maintenance of inverters. Product Maintenance Maintenance is required to ensure the inverter remains in proper condition, prolonging service life and prevent potential issues.
  • Page 145 necessary to replace the external fans. Please refer to Figure 7-1 for replacing the cooling fans. Use a No. 2 Phillips head screwdriver to remove the 10 screws on the fan tray (6 screws on the upper fan tray, and 4 screws on the lower fan tray).
  • Page 146 Figure 8-1 Replacing Cooling Fans...

  • Page 147: Replace The Inverter

    DANGER: Please disconnect the electrical connection 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: ...
  • Page 148 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 149: D E - Installing 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. Attach the cover on the connector of wiring box. Torque value: 1.6N.m (14.2in-lbs) Figure 8-5 Install the cover on the connector of the wiring box The cover connector does not provide a watertight seal –...
  • Page 150 Disconnect the AC and PE cables referring to “3.3.4 AC and ground connection”. Disconnect the DC cables referring to “3.3.3 DC connection”. Caution: if PV strings terminate directly in the wiring box and do not pass through a breaker or switch that was opened in Step 2 these strings may be energized.

  • Page 151: Accessories

    Accessories The CPS SCA25KTL-DO/US-208、CPS SCA50KTL-DO/US-480 and SCA60 KTL-DO/US-480 inverters have several optional accessories that allow the inverter to support a wide range of real-world applications. Fuse Bypass Terminals 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 152 Figure 9-2 Remove Plastic Touchsafe Figure 9-1 Remove Wirebox Cover Finger Guards Figure 9-3 Bypass Terminals Installed on Figure 9-4 Bypass Terminals Installed on POS Input NEG Bus...

  • Page 153: 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-F ield-Testing-Report-28kW-Inveter-Shade-Plate.pdf...

  • Page 154: Y-Comb Terminal Block (Optional)

    Y-Comb Terminal Block (Optional) The Y-Comb is intended for use in the SCA25KTL-DO/US-208 、SCA 50 /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 155: 10 Technical Data

    10 Technical Data 10.1 Datasheet CPS SCA CPS SCA CPS SCA Model Name 25KTL-DO/US-208 50KTL-DO/US-480 60KTL-DO/US-480 DC Input 75kW (30kW per 90kW (33kW per 37.5kW Max. PV Power MPPT) MPPT) Max. DC Input Voltage 1000V Operating DC Input 200-950V Voltage Range...
  • Page 156 Display and Communication User Interface and LCD + LED Display Inverter Monitoring SunSpec,Modbus RS485 Site Level Monitoring CPS Flex Gateway (1 per 32 inverters) Modbus Data Mapping Remote Diagnostics / Standard / with Flex Gateway FW Upgrade Functions Mechanical Data...
  • Page 157 Dimensions (HxWxD) 39.4 x 23.6 x 10.24 in. (1000× 600× 260mm) Weight Inverter:123.5lbs/56kg; Wirebox:33lbs/15kg 15 to 90 degrees from horizontal Mounting / Installation Angle (vertical, or angled) M8 Stud Type Terminal Block AC Termination (Wire range: #6-3/0AWG CU or #6-3/0AWG AL) Lugs not supplied DC Termination Screw Clamp, Neg.

  • Page 158: Measurement Tolerances

     ± 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% ...

  • Page 159: 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 160: 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 SCA25/50/60KTL-DO/US Derating Curve with High Altitude...

  • Page 161: Grid Voltage Derating Graph

    10.3.3 Grid Voltage Derating Graph 1) When volt-watt function disable, the 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.
  • Page 162 Po/Pn volt-watt function enable 100% 0.88*Un 1.06*Un 1.1*Un Grid Voltage (Vac) Figure 10-3-2 SCA25/50/60KTL-DO/US Derating Curve of Grid Voltage...

  • Page 163: Reactive Power Capability

    The Reactive Power Overload function is disabled by factory default (Max. AC Apparent Power is 25/50/60kVA and Max. AC Output Current is 69.5/60.2A/72.2A). Contact CPS Customer Service if you want to enable the function. Figure 10-4 SCA25/50/60KTL-DO/US Reactive Power Capability...

  • Page 164: 11 Limited Warranty

    The warranty policy of this product is specified in the contract; otherwise, the standard warranty is 5 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.

This manual is also suitable for:

Sca25ktl-do-208Sca25ktl-us-208Sca50ktl-do-480Sca50ktl-us-480Sca60ktl-do-480Sca60ktl-us-480

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