CPS SCA23KTL-DO/US-480 Installation And Operation Manual
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CPS SCA23KTL-DO/US-480 Installation And Operation Manual

Grid-tied pv inverter
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CPS SCA Series Grid-tied PV Inverter
CPS SCA23/28KTL-DO/US-480
Installation and Operation Manual
Version 1.4
SHANGHAI CHINT POWER SYSTEMS CO., LTD.
1

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Summary of Contents for CPS SCA23KTL-DO/US-480

  • Page 1 CPS SCA Series Grid-tied PV Inverter CPS SCA23/28KTL-DO/US-480 Installation and Operation Manual Version 1.4 SHANGHAI CHINT POWER SYSTEMS CO., LTD.

  • Page 2: Table Of Contents

    Table of Contents Before You Start… ..................4 Chapter 1 IMPORTANT SAFETY INSTRUCTIONS ........5 Chapter 2 Overview ..................8 2.1 Inverter for grid-tied PV systems ........... 8 2.2 Product features ................8 2.3 Product protection functions ............9 2.4 Circuit structure design ..............9 2.5 Appearance Description ..............
  • Page 3 5.4.3 History ................... 65 5.4.4 System configuration ............. 67 5.4.5 Power dispatch ..............70 5.4.6 System protection parameters setup ........70 5.4.7 System control parameters ............ 72 5.4.8 Arcing fault current interruption ..........79 Chapter 6 Operation ................... 82 6.1 Start-up ..................82 6.2 Shut-down ..................

  • Page 4: Before You Start

    This manual contains important information regarding installation and safe operation of this unit. Be sure to read this manual carefully before using. Thank you for choosing this CPS Grid-tied PV Inverter. This PV Inverter is a high performance and highly reliable product specifically designed for the North American Solar market.

  • Page 5: Chapter 1 Important Safety Instructions

    Chapter 1 IMPORTANT SAFETY INSTRUCTIONS (SAVE THESE INSTRUCTIONS) Please read this user manual carefully before product installation. CPS reserves the right to refuse warranty claims for equipment damage if the user fails to install the equipment according to the instructions in this manual.
  • Page 6 Markings on the product HIGH VOLTAGE: The product works with high voltages. All work on the product must only be performed as described in this document. HOT SURFACE: The equipment is designed to meet international safety standards, but surfaces can become hot during operation. Do not touch the heat sink or peripheral surfaces during or shortly after operation.
  • Page 7 Please ensure the mounting is properly installed before hanging the inverter on the bracket. CAUTION: CPS SCA23/28KTL-DO series inverter have the Arc Fault Detection feature in the disabled mode by default. Please ensure that this setting meets local code requirements. If you need to enable this feature for your install then please call our HOTLINE: 855-584-7168, or contact your local sales or service manager for assistance.

  • Page 8: Chapter 2 Overview

    Chapter 2 Overview 2.1 Inverter for grid-tied PV systems CPS SCA23/28KTL-DO/US-480 series inverter is suitable for use with commercial and large scale PV grid-tied systems. The system is generally made up of PV modules, DC power distribution equipment, PV inverter and AC power distribution equipment (Figure 2-1).

  • Page 9: Product Protection Functions

    Input and output over-voltage protection  Input over-current protection  Environmental temperature monitoring  Module temperature monitoring * The AFCI function ships from factory in disabled mode, to enable this feature please contact CPS at HOTLINE: 855-584-7168 number to get instructions.
  • Page 10 EMI wave filter to produce high quality AC power. Fuses Input Switch MPPT1 Output PV1+ PV1+ PV1+ PV1+ PV1+ Switch PV1- PV1- PV1- PV1- PV1- MPPT2 PV2+ PV2+ PV2+ PV2+ PV2+ PV2- PV2- Three level PV2- inverter PV2- PV2- Figure 2-2 Schematic diagram of CPS SCA23/28KTL-DO series inverter...

  • Page 11: Appearance Description

    2.5 Appearance Description 5 6 7 Figure 2-3 Appearance sketch of CPS SCA23/28KTL-DO series inverter Main items of the inverter: 1) Main housing of the inverter 2) Wiring box of the inverter 3) Mounting bracket 4) External cooling fans 5) LED indication lights...

  • Page 12: Chapter 3 Installation

    Chapter 3 Installation Below is the installation procedure for the inverter. Please read carefully and install the product step-by-step. Before installation, please check that the following items are included in the package: Table 3-1 Main items Q’ty Item Note Main housing of the PV inverter Wiring box of the PV inverter...
  • Page 13 For mounting bracket and inverter, M5X10 screw external ground connection M3X8 screw For Partition plate; 1 spare part For internal ground stud connection; 1 M5 flange nut spare part Lifting eye nut M10 For lifting the main housing OT type terminal For ground connection Pre-insulated For AC output cables, 1 spare part...

  • Page 14: Recommendations Before Installation

    3.1 Recommendations before installation  Check that the product environmental specifications (protection degree, operating temperature range, humidity and altitude, etc) meet the requirements of the specific project location;  Make sure that the power grid voltage is within normal range; ...

  • Page 15: Mechanical Installation

    3.2 Mechanical installation 1) Dimensions DC DISCONNECT Figure 3-1 Dimensions of CPS SCA23/28KTL-DO series inverter 2) Installation method (see Figure 3-2): Make sure that the mounting structure (wall, rack, etc) is suitable to support the inverter weight. Follow the mounting guidelines below:...
  • Page 16 (b) If the inverter cannot be mounted vertically, it may be tilted backward by no lower than 15 degrees from horizontal. (c) Do NOT mount the inverter leaning forward. (d) Do NOT mount the inverter in a horizontal position (<15 degrees). (e) Do NOT mount the inverter upside down.
  • Page 17 cover is recommended to be installed above the inverter to avoid direct sunlight. 3) Installation space requirement (see Figure 3-3): The distances between the inverters or the surrounding objects should meet the following conditions: NOTICE: The spacing between two adjacently mounted inverters should be ≥500mm (19.7 inches).
  • Page 18 NOTICE: The installation clearance between two inverters needs to be increased when the ambient temperature is higher than 45℃. INSTRUCTION: If the inverter is tilted backward by no lower than 15° from horizontal, the bottom clearance distance can be reduced according to specific conditions.
  • Page 19 solid wall), the top clearance distance can be reduced to as minimum as 100mm (3.94in.). 4) Mount the inverter onto the bracket (1) Mark the 8 holes on the bearing surface for mounting the bracket as shown in Figure 3-5; 550mm(min.) (21.7in.) 1100mm(min.)
  • Page 20 Manual mounting: Two people grab the handle positions marked in Figure 3-8, and mount the inverter onto the bracket. CAUTION: The main housing of the CPS SCA23/28KTL-DO series inverter is about 46.5kg (≈102.5 pounds). Please ensure the mounting is properly installed before hanging the the inverter on the bracket.
  • Page 21 Figure 3-7 Mount the main housing on the bracket by lifting Figure 3-8 Position of grab handle (4) Install the wiring box ① Remove the cover plate at the bottom of the main housing. (see Figure...
  • Page 22 3-9) Tool: No.2 Phillips head screwdriver Figure 3-9 Cover plate of the main housing ② Remove the cover board at the top of the wiring box (see Figure 3-10) Figure 3-10 Cover board of the wiring box Save the cover board and screws, and fix the board on the left side of the wiring box after the wiring box is attached to the inverter housing (see step 6, Figure 3-13) Tool: No.2 Phillips head screwdriver...
  • Page 23 Tool: No. 10 Wrench, torque value of 2.8N.m Figure 3-11 Installation of the wiring box CAUTION: The total weight of the CPS SCA23/28KTL-DO series inverter is about 55kg (≈122 pounds). Please ensure the mounting is properly installed before hanging the the inverter on the bracket.
  • Page 24 Figure 3-12 Fix the main housing and wiring box on the bracket (6) Attach the cover board shown in Figure 3-10 to the left side of the wiring box. (see Figure 3-13) Tool: No.2 Phillips head screwdriver, torque value of 1.2N.m Figure 3-13 Attach the cover board to the left side of the wiring box...
  • Page 25 (7) 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. You can lock the inverter on the bracket, as shown in Figure 3-14: Figure 3-14 Location of the anti-theft padlock The anti-theft padlock should meet the requirement of the dimensions shown in Figure 3-15:...
  • Page 26 5) Removing/Replacing the wire box cover: (1) Use a 3mm (0.12in.) Hex screwdriver to remove the 4 screws on the wiring box and take off the cover. (see Figure 3-16(a)) Figure 3-16(a)- Take off the cover of the wiring box (2)To replace the cover use a 3mm (0.12in.) Hex screwdriver to replace the 4 screws on the cover.
  • Page 27 INSTRUCTION: We posted on our website, www.chintpowersystems.com, under the Service menu a ‘how to’ video showing the best technique for installing the wire-box cover.

  • Page 28: Electrical Installation

    3.3 Electrical installation The connection interface of CPS SCA23/28KTL-DO series inverter: Figure 3-16(b) : Full view of wiring box with options. 20.3 in. (515mm) 18.7 in. (475mm) 15.9 in. (405mm) 13.7 in. (347mm) 10.9 in. (277mm) 8.5 in. (217mm) 6.2 in.
  • Page 29 9 10 Figure 3-18 Internal connection points ① Knockout holes for DC input cable, 1-1/4” or 1” ② Knockout hole for AC output cable, 1-1/4” or 1” ③ Knockout hole 1/2inch & 3/4inch,for comm. cable ④ Knockout hole 1/2inch & 3/4inch,for comm. cable,reserved ⑤...

  • Page 30: Dc Connection

    3.3.1 DC connection 1) Working mode CPS SCA23/28KTL-DO series inverter has two PV input sections: DC Input-1 and DC Input-2. These two sections can work under “Parallel mode” or “Independent mode”. (see Figure 3-19) Under Parallel mode, the two PV input sections share one MPP Tracker;...
  • Page 31 torque value of 1.6N.m(see Figure 3-20b) Set the selector switch on the LCD board (see Figure 3-21) to independent mode. Reinstall the protection cover (see Figure 3-20c). Figure 3-20(a) Jumper busbar Figure 3-20(b)
  • Page 32 Figure 3-20(c) S401 S402 Communication board Figure 3-21 Location of the PV connection mode selector switch...
  • Page 33 2-----parallel mode mode 2) DC fuse configuration CPS SCA23/28KTL-DO inverters are equipped with standard 15A (23/28kW Inverter) DC fuses. Customers must verify that the appropriate fuses are used depending on the actual configuration of PV strings. 1） Each independent string of DC input from the PV strings needs fuse protection.
  • Page 34 Note 2: The DC fuse protectors of different fusing capacity should be chosen according to the short circuit current of PV modules. The 1000VDC Littelfuse KLKD fuse series are recommended. The detailed information is available for customers to find and download from http://www.littelfuse.com/.
  • Page 35 IN1+ 1MPPT- IN1- Parallel Inverter IN2+ Mode PV2+ Bypass Fuse IN2- PV2- Current DC cable 2AWG(Maximum) Fuse Rare 2 strings Configuration 23kW 28kW IN1+ PV1+ 2MPPT- IN1- PV1- Independent Inverter Mode IN2+ PV2+ Bypass Fuse IN2- PV2-...
  • Page 36 IN1+ PV1+ 1MPPT- IN1- PV1- Parallel Inverter Mode IN2+ PV2+ Bypass Fuse IN2- PV2- Current DC cable 2AWG (Maximum) Fuse Common 4 strings Configuration 23kW 28kW PV1+ IN1+ 2MPPT- PV1- IN1- Independent Inverter PV2+ IN2+ Mode PV2- IN2- PV1+ IN1+ 1MPPT- PV1- IN1-...
  • Page 37 Common 5 strings Configuration 23kW 28kW IN1+ PV1+ 1MPPT- IN1- PV1- Parallel Inverter PV2+ IN2+ Mode PV2- IN2- PV1+ IN1+ 1MPPT- PV1- IN1- Parallel Inverter IN2+ PV2+ Mode PV2- IN2- Current 11.6A DC cable 16~6AWG 16~6AWG Common 6 strings Configuration 23kW 28kW PV1+...
  • Page 38 PV1+ IN1+ 1MPPT- IN1- PV1- Parallel Inverter IN2+ PV2+ Mode PV2- IN2- Current 8.4A 9.7A DC cable 16~6AWG 16~6AWG Common 7 strings Configuration 23kW 28kW PV1+ IN1+ 1MPPT- IN1- PV1- Parallel Inverter IN2+ PV2+ Mode IN2- PV2- IN1+ PV1+ 1MPPT- IN1- PV1- Parallel...
  • Page 39 Common 8 strings Configuration 23kW 28kW IN1+ PV1+ 2MPPT- IN1- PV1- Independent Inverter IN2+ PV2+ Mode IN2- PV2- IN1+ PV1+ 1MPPT- IN1- PV1- Parallel Inverter IN2+ PV2+ Mode IN2- PV2- Current 6.3A 7.3A DC cable 16~6AWG 16~6AWG Note 1: The temperature rating of the input wirings should be no less than 90℃(194℉).
  • Page 40 iii. The negative (-) terminal of cable should match the negative (-) terminal of inverter’s DC input. NOTICE: It is important to use a multi-meter to check the polarity of DC input cables to avoid any risk of reverse polarity. Figure 3-22 Polarity check (e) Knock out the holes of the DC side and plug the suitable conduits of 1-1/4 or 1 inch through the holes.

  • Page 41: Ac And Ground Connection

    Tools: 6mm (0.23in.) flat screwdriver Torque value: 3.4 N-m Figure 3-24(a) Connection of DC input cables Figure 3-24(b) Connection of DC input cables 3.3.2 AC and ground connection The following describes how to connect the AC output and ground cables between the inverter and the AC grid: 1) Use the 3mm (0.12in.) Hex screwdriver to remove the 4 screws on the wiring box and take off the cover.
  • Page 42 procedures are illustrated below. Figure 3-25 Take off the cover of the wiring box Table 3-7 Necessary tools for cable set up Tools 6mm (0.23in.) flat screwdriver 8mm hex socket wrench Diagonal pliers Wire stripping pliers Crimping pliers Table 3-8Torque value AC output terminal block 3.5 N-m Internal grounding bar...
  • Page 43  For more details please see the user manual. WARNING: High touch current . Earth connection essential before connecting supply. ANTENNA Figure 3-26(a) AC output and ground cable connection...
  • Page 44  For more details please see the user manual. WARNING: High touch current . Earth connection essential before connecting supply. ANTENNA Figure 3-26(b) AC output and ground cable connection （1） The AC cables are recommended to be pre-insulated to ensure the cables are well connected.
  • Page 45 Pre-insulated end ferrule 5pcs Core wire Pre-insulated end ferrule Figure 3-27 AC output and ground cable set up （2） Connect the AC (L1, L2, L3, N) cables to the terminal block and use the OT type terminal to connect the ground cable to the internal grounding stud inside the wiring box.
  • Page 46 50A or 70A. A smaller breaker may also be used, keeping in mind that a smaller breaker may result in nuisance trips that may need servicing.Table 3-9 Specification of AC breaker selection Inverter AC breaker rated current（A） CPS SCA23KTL-DO CPS SCA28KTL-DO...

  • Page 47: Communication Connection

    3.3.3 Communication connection CPS SCA23/28KTL-DO series inverter supports industry standard Modbus RS485 communication. Communication board description S401 S402 Communication board Partition plate Figure 3-30 Communication board Connectors and communication cards Table 3-10 Communication connection interfaces Item Picture Configuration description ① Dry...
  • Page 48 ② USB port Firmware upgrade via USB disk P207 ③ RS485 Colour Function port IN White orange 485+ （P204） Orange ④ RS485 White green 485- port OUT Blue N.C. （P203） White blue N.C. (RJ45 Green N.C. connector) White brown COM Brown ⑤...
  • Page 49 ation S402 ⑦ Selector 1-----Independent mode switch for 2-----Parallel mode setting the connection mode S401 ① Dry contact communication: The inverter features an alarm function that opens or closes a dry contact on the communication board. (available both as contact normally open – N.O. – and as contact normally closed –...
  • Page 50 Different modes of dry contact output can be accessed by connecting different pins of the P205 connector, as shown in following table. Table 3-12 Working modes of dry contact Dry contact communication Status in fault Status without fault port condition condition P205: N.O.
  • Page 51 If you connect the contact port to the power distribution grid, you must install an individual miniature circuit-breaker between the dry contact and the power distribution grid. Dry contact communication cable connection: a.) Knock out the holes for suitable cable conduits of 3/4 inch. b.) Put the dry contact communication cable through the cable conduit and inside the wiring box.
  • Page 52 d.) Connect wires to the terminal. Tool: 2 or 2.5mm flat screwdriver Cable Color Function N.O. Blue N.C. Green Figure 3-34 Wire connection e.) Plug the cable terminal into the P205 connector. Figure 3-35 The dry contact communication cable connection...
  • Page 53 ② RS485 communication cable connection: Choose the RS485 communication cables according to the following table: Table 3-14 Cables specifications Cable RS485 UTP CAT-5e or 3x#22~18AWG communication cable communication (eg. Belden 3106A) Figure 3-36 RS485 connection 1. Cable connection of RS485 communication: RJ45 connector 2.
  • Page 54 Colour Function White orange 485+ Orange White green 485- Blue N.C. White blue N.C. Green N.C. White brown COM Brown Figure 3-37 Crimp RJ45 connector on the RS485 and Ethernet cable 1 -----NC 2 -----NC 3 (Red)--------RS485+ 4 (Blue) -------RS485- 5 (Green)----- COM (1) RS485 communication of single inverter (2) RS485 network communication...
  • Page 55 Wire stripping pliers, 2 or 2.5mm (0.08in. or 0.1in.) flat screwdriver (for 5 pin connector) b.) Plug the crimped connector into the corresponding port. RS485 network connection: When the inverters are monitored via the RS485 communication, the unique RS485 address for each inverter can be set through the LCD interface. Up to 31 inverters can be connected together in the RS485 communication network.

  • Page 56: Chapter 4 Commissioning

    Chapter 4 Commissioning WARNING: Please follow the guidelines below before on-grid operation to eliminate possible dangers to ensure safety. 4.1 Commissioning Checklist 4.1.1 Mechanical installation Make sure that the mounting bracket is secure and all the screws have been tightened to the specified torque values. (Please refer to 3.2 Mechanical installation) 4.1.2 Cable connections ...
  • Page 57 the PV array is sufficient, the LCD screen of inverter will light up. The inverter will then start up with the message “sys checking”. 4.) Set up the grid standard: INSTRUCTION: Please check with your local electricity supply company before selecting the grid standard.
  • Page 58 Figure 4-2 Select grid standard 5.) When the LCD screen shows the normal operation status (Figure 4-3) and the “RUN” light on the LED panel lights up, it indicates that the grid connection and power generation are successful. 725 V 720 V 27.9 22.9...

  • Page 59: Chapter 5 User Interface

    Chapter 5 User Interface 5.1 Description of LCD panel The inverter’s LCD panel mainly consists of LCD screen, LED indicator lights, buzzer and 4 keys, as shown in Figure 5-1. POWER GRID FAULT Figure 5-1 LCD panel Interpretation for the indicator lights is shown in Table 5-1 and function of the keys is shown in Table 5-2.
  • Page 60 operation indication Derated running status (light up 0.5s, Flash light light off 1.6s) Light In other operation status or power supply not working Light Grid is normal Grid status GRID Flash Grid fault (light up 0.5s, light off 1.6s) indication Light light Power supply not working...

  • Page 61: Operation State

    Page down in selection menu/-1 when Down setting parameters 5.2 Operation state Table 5-1 indicates the definitions of LED, i.e. indicates the information of the inverter’s operation state. It indicates that the system is energized and under DSP control when “POWER” lights up. “RUN”...
  • Page 62 Figure 5-2 LOGO interface (2) Indication of inverter operation mode: Sys.Checking >>>>>> Figure 5-3 Inverter system check ongoing Standby >>>>>> Figure 5-4 Inverter system in standby mode 725 V 720 V 27.9 22.9 38.5A 31.9A 223.2 183.7 08/12 13:10:05 08/12 13:10:10 Figure 5-5 Default display interface for normal operation...

  • Page 63: Menu Functions

    GridV.OutLim Figure 5-6 Fault indication interface LCD screen will display different mode interfaces based on the operation modes of the inverter. There are four operation modes: startup system check mode (as shown in Figure 5-3), stand-by mode (as shown in Figure 5-4), normal operation mode (as shown in Figure 5-5, the switching time between (a) and (b) is 5 seconds), and fault mode (as shown in Figure 5-6).

  • Page 64: Operation Information

    Figure 5-7 Main menus on the LCD screen The main operation interface of LCD screen has 5 menus, i.e. “1 OP. Info”, “2 Alarm”, “3 History”, “4 Setting” and “5 Dispatch”. The users may select options with UP and DOWN, and then press ENT to confirm selection. The users can return to the default indication interface by pressing ESC.

  • Page 65: Alarm

    Remarks：The LCD display is shown as follows when PV parallel mode is selected. 360.0V 14.7A Figure 5-9 Operation information indication (PV parallel mode) 5.4.2 Alarm As described before, if a fault occurs during normal operation of the inverter, corresponding fault messages will be indicated in “2 Alarm” menu in addition to the sound and light alarms.
  • Page 66 History”: “1 HistErr”, “2 OP. Recd”, “3 Version” and “4 TotalTag”. (1) The error log can store up 100 fault messages in “1 HistErr” menu. (2) The last 21 days of operation history data is available to be checked in “2 OP.

  • Page 67: System Configuration

    5.4.4 System configuration Move the cursor to “4 Setting” in the main interface. Press ENT to enter the password: UP -> DOWN -> UP -> DOWN . Press ENT to confirm, and set the current system parameters, as shown in Figure 5-12. There are 7 submenus in “4 Setting”: “1 ON/OFF”, “2 Language”, “3 Buzzer”, “4 SysTime”, “5 Commun.”, “6 OtherCmd”...
  • Page 68 (1) The inverter can be started and shut down with “1 ON/OFF” menu. Move the cursor to “ON” and press ENT , “ON State” will then be indicated at the bottom of LCD screen; move the cursor to “OFF” and press ENT , then “OFF State”...
  • Page 69 2. “ARCFaultClear” is used to clear the ARC fault. Move the cursor to this menu, and press ENT. The operation result will appear on the LCD, ie. “Succeed” or “Failed”. 3. MPPT scan function is effective only when and the total input power is lower than 90% of the active power spec on parallel, if not in parallel, each input power is lower than 75% of the each input spec.

  • Page 70: Power Dispatch

    5.4.5 Power dispatch Move the cursor to “5 Dispatch” in the main interface and press ENT to go to the following interface (Figure 5-13): ActivePower(%) 100.0 5 Dispatch PowerFactor 1.000 Figure 5-13 Active Power and PowerFactor Remote power dispatch: The “ActivePower” and “PowerFactor” can be adjusted remotely by software.
  • Page 71 1 GridVProtect 2 GridFProtect 3 ON/OFF 4 PowerContr 5 LVRTSet 6 OtherProtect →1 SysPara. Pls Input Pwd **** 2 Restart 3 Recover Are You Sure? 4 ClrErrRecd 5 StdSet Initialization? Pwd Error Pls Input Again **** Wrong Pwd Restarting.. Recovering.. FaultOperated Success ! Success !

  • Page 72: System Control Parameters

    Please refer to the “6.2 Manual shutdown” to turn off the inverter. INSTRUCTION: CPS SCA23/28KTL-DO series PV inverter supports 7 grid standards. Please check with your local electricity supply company before selecting the grid standard. If the inverter is operated with a wrong grid standard, the electricity supply company may cancel the operation license.
  • Page 73 Table 5-3 Parameters of grid voltage and frequency (IEEE-1547) Setup range (lower limit, Parameter name Description default & upper limit) Threshold value of Level 1 GridV.Max1(V) {200.0, 528.0, 552.0} Max. grid voltage Threshold value of Level 1 VMaxTripT1(S) {0, 1.00, 600.00} Max.
  • Page 74 Trip time of Level 1 Max. grid FmaxTripT1(S) {0, 0.16, 600.00} frequency Protection threshold value of GridF.Min1(Hz) {45.00, 59.30, 60.00} Level 1 Min. grid frequency Trip time of Level 1 Min. grid FminTripT1(S) {0, 0.16, 600.00} frequency Protection threshold value of GridF.Max2(Hz) {50.00, 61.00, 66.00} Level 2 Max.
  • Page 75 Table 5-4 Start-up and turn-off control parameters Setup range (lower limit, Parameter name Description default & upper limit) PVStartVol(V) PV start-up voltage {300.0, 330.0, 400.0} {0.01, 0.92, 2.00} (CPS SCA23KTL) SoftStep(KW/S) Soft step {0.01, 1.12, 2.00} (CPS SCA28KTL) {Disable, Disable, SoftOffOption Soft turn off option Enable} {{0.01, 1.38, 2.00}...
  • Page 76 1 None 5 PF(P) Curve → 2 Dispatch 6 Q(U) Curve 3 QReactSet 4 PF Set Figure 5-15 Reactive power mode 1). None： No mode/disable reactive power mode 2). Dispatch： Remote power dispatch mode Note: The ActivePower, PF and Q value can be adjusted by remote software if the “Dispatch”...
  • Page 77 (PFCurveP1,PFCurvePF1) Inductive (P%) Capacitive (PFCurveP2,PFCurvePF2) Figure 5-16 PF(P) curve mode 6). Q(U) Curve：Q(U) curve mode Note: The reactive compensation changes according to the grid voltage change, as shown in Figure 5-17. INSTRUCTION: The Q(U) curve function is only available for CEI 0-21 and IEEE-1547 grid standards.
  • Page 78 The Table 5-5 lists the parameters of QReactSet, PF Set, PF(P) Curve and Q(U) Curve modes. Press ENT to start up the modes after the parameters are set up. Table 5-5 Parameters of reactive power control (IEEE-1547) Setup range (lower limit, Mode Parameter Name Description...

  • Page 79: Arcing Fault Current Interruption

    (CPS SCA28KTL) 5.4.8 Arcing fault current interruption CPS SCA23/28KTL-DO/US-480 is embedded with Type 1 DC arcing fault current detection device which stops the inverter from working when arcing fault current is detected on the DC side and shows “ARC Protect” on the LCD.
  • Page 80 CPS customer service at Hotline: 855-584-7168 ARC Protect Figure 5-18 ARC Protect fault In the “System Setting””OtherCmd” menu, execute the “AFCI Test”, the inverter will stop working and test AFCI. When the test is over, “TestFinish” will be displayed on the LCD if no fault is detected or “AFCI Fault”...
  • Page 81 In the “System Setting””OtherCmd” menu, execute “ARCFaultClear” command to clear “ARC Protect” fault alarm, and LCD will show “Succeed” if the fault is successfully cleared, as shown in Figure 5-21. AFCIOperation Enable ARCFaultClear Succeed Figure 5-21 Manually clear “ARC Protect” fault...

  • Page 82: Chapter 6 Operation

    Chapter 6 Operation 6.1 Start-up Manual start-up: Manual start-up is required after regulation setting or manual (fault) shut-down. Move the cursor from the main operation interface to “4 Setting”. Press ENT and go to submenu “1 ON/OFF”. Then move the cursor to “ON”...
  • Page 83 Sys.Checking >>>>>> Figure 6-1 System self check ongoing This mode indicates that the inverter is checking whether it is ready for normal operation after the manual start-up of inverter. (2) Normal operation mode: Default indication interface for normal operation is shown in Figure 6-2 (a) and 6-2 (b). The switching time between (a) and (b) is 5 seconds.

  • Page 84: Grid-Tied Power Generation

    DC and AC. 6.4 Grid-tied power generation CPS SCA23/28KTL-DO/US-480 series inverter has an automatic grid-tied power generation process. It will check constantly whether AC power grid meets the conditions for grid-tied power generation, and also test whether the...
  • Page 85 PV array has adequate energy. After all conditions are met, the inverter will enter grid-tied power generation mode. While in grid-tied power generation, the inverter can detect the power grid at all times, and also keep the photovoltaic array output in maximum power point tracking (MPPT) mode. In case of any abnormity, the inverter will enter the protection program immediately.

  • Page 86: Chapter 7 Maintenance And De-Installation

    Chapter 7 Maintenance and De-installation 7.1 Fault shut down and troubleshooting 7.1.1 LED fault and troubleshooting Please refer to the definition of LED lights in Table 5-1 and troubleshoot according to Table 7-1: Table 7-1 Trouble shooting of LED lights LED fault status Solutions Neither the “Power”...
  • Page 87 overfrequency / underfrequency, high environmental temperature or internal malfunction of the machine. The fault information will be displayed on the LCD screen. Please refer to “5.4.2 Present fault” for detailed operation. The causes of a fault can be identified based on the faults listed in Table 7-2.
  • Page 88 will be eliminated automatically; 2.Switch off 3-phase working power supply and then reboot the system; 3.Contact after-sales service personnel Definition: Cooling fan failure by visual check Possible causes: 1.Fan is blocked; 2.Fan service life has expired; 3. Fan socket connecter has poor contact. 3.ExtFanErr Recommended solutions: 1.Observe for 5 minutes and see whether the alarm...
  • Page 89 1.Ambient temperature outside the inverter is too high; 2.Fan is blocked; 3. Convection airflow is insufficient due to improper installation. Recommended solutions: 1.Confirm that external ambient temperature is within the specified range of operating temperature; 2.Check whether air inlet is blocked; 3.Check whether fan is blocked;...
  • Page 90 and power grid is disconnected or has any fault; 4.Contact after-sales service personnel Definition: Grid voltage frequency is abnormal, or power grid is not detected Possible causes: 1.Grid frequency is abnormal; 2.Cable connection between the inverter and the grid is poor; 3.GridF.OutLim Recommended solutions: 1.Observe for 10 minutes and see whether the...
  • Page 91 4.Contact after-sales service personnel Definition: PV module is connected inversely Possible causes: PV positive pole and negative pole are connected 5.PV1 (2) Reverse** inversely; Recommended solutions: 1.Check whether positive pole and negative pole are connected inversely; 2.Contact after-sales service personnel Definition: System leakage current is too high Possible causes:...
  • Page 92 Recommended solutions: 1.Observe for 10 minutes and see whether the alarm will be eliminated automatically; 2.Check insulation of PV system; 3.Contact after-sales service personnel Definition: ARC fault Possible causes: Protection actions of ARC board Recommended solutions: 8.ARC Protect 1. Use “ARCFaultClear” to clear the ARC fault. (Refer to section 5.4.4) 2.
  • Page 93 Protection procedure occurs inside the inverter Recommended solutions: 1.Observe for 10 minutes and see whether the alarm will be eliminated automatically; 2.Contact after-sales service personnel Definition: Internal fault of the inverter Possible causes: Fault occurs inside the inverter Fault IntFault0010~0150 Recommended solutions: 1.The inverter can be forced to restart once if it is required by operation and if it is confirmed that...

  • Page 94: Product Maintenance

    7.2 Product maintenance 7.2.1 Check the electrical connection Check all the cable connections as a regular maintenance inspection every 6 months or once a year. 1.) Check the cable connections. If loose, please tighten all the cables referring to “3.3 Electrical installation”. 2.) Check for cable damage, especially whether the cable surface is scratched or smooth.
  • Page 96 50~60mm 50~60mm Figure 7-1 Replace cooling fans...

  • Page 97: Replace The Inverter

    7.2.4 Replace the inverter Please confirm the following things before replacing the inverter: (1) The inverter is turned off. (2) The DC switch of the inverter is turned to OFF position. Then Replace the inverter according to the following steps: a.) Unlock the padlock if it is installed on the inverter.
  • Page 98 c.) Use a No. 10 Hex wrench to remove the 4 screws between the main housing and the wiring box. Lift up the main housing and disconnect from the wiring box. Figure 7-4 Disconnect the main housing from the wiring box d.) Use a No.2 Phillips head screwdriver to remove the 2 screws on the left side of the wiring box, and take off the cover board.

  • Page 99: De-Installing The Inverter

    7.3 De-installing the inverter De-install the inverter according to the following steps when the service time is due or for other reasons: 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.

  • Page 100: Chapter 8 Technical Data

    Chapter 8 Technical Data Model Name SCA23KTL-DO/US-480 SCA28KTL-DO/US-480 DC Input Max. PV Power 31kW (15.5kW/MPPT) 38kW (19kW/MPPT) Nominal DC Input 24kW 29kW Power Max. DC Input Voltage 1000Vdc Operating DC Input 300-900Vdc Voltage Range Start-up DC Input 330V/300W Voltage / Power...
  • Page 101 Current THD <3% AC Disconnection Type Load rated AC switch System Topology Transformerless Max. Efficiency 98.6% CEC Efficiency 98.0% Stand-by / Night <20W / <2W Consumption Environment Protection Degree NEMA 4 Cooling Variable speed cooling fans Operating Temperature -13°F to +140°F / - 25°C to +60°C (derating from Range +113°F / +45°C) Storage Temperature...
  • Page 102 Note 1: When the DC input voltage is lower than 480V or higher than 800V, the inverter begins derating, as shown in Figure 8-1: Po/Pn 100% 1000 (480) PV Voltage (V) Figure 8-1 SCA23/28KTL derating curve of PV input voltage Note 2: When the ambient temperature is higher than 113℉...
  • Page 103 Note 3: When the altitude is higher than 6562ft (2000m), the power of the inverter needs derating, as shown in Figure 8-3: Po/Pn 100% 6562ft 13123ft (2000m) (4000m) Figure 8-3 SCA23/28KTL derating curve with high altitude Note 4: The inverter can output the AC power with full loads under 88%~110% of the rated grid voltage.

  • Page 104: Chapter 9 Limited Warranty

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

  • Page 105: Appendix: Instruction Of Inverter Selection

    □ 1DC and 1AC SPD Options □ Zigbee card □ Ethernet card □ Bypass input terminalsx2 1 or 2 The following figure shows the wiring box equipped with the optional components: Figure A-1 Internal structure of CPS SCA23/28KTL-DO inverter with optional components...
  • Page 106 Bypass input terminal instructions: Remove the protection cover . (see Figure A-2) Use No.2 Phillips head screwdriver to remove the jumper busbar, torque value of 1.6N.m . (see Figure A-3) Use No.2 Phillips head screwdriver to install the bypass input terminals, 2sets or 1set, torque value of 1.6N.m.(see Figure A-5) Use No.
  • Page 107 Figure A-4(a) Figure A-4(b) Figure A-5(a)
  • Page 108 Figure A-5(b) Figure A-6...
  • Page 109 CHINT POWER SYSTEMS AMERICA CO., LTD. Address: 700 International Parkway, Suite 102 Richardson, Texas 75081 Service Hotline: 855-584-7168 Email: AmericaSales@chintpower.com Website: http://www.chintpowersystems.com/ SHANGHAI CHINT POWER SYSTEMS CO., LTD. Headquarters: Building 4, No. 3255, Sixian Road, Songjiang District, Shanghai, China Tele: +86 -21 -3779 1222 -6300 Fax: +86 -21 -3779 1222 -6001 Part No: 9.0020.0212A0 This manual is subject to change without prior notification.

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Sca28ktl-do/us-480

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