Chint Power CPS SCA20KTL-DO Installation And Operation Manual
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Chint Power CPS SCA20KTL-DO Installation And Operation Manual

Cps sca series grid-tied pv inverter
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CPS SCA Series Grid-tied PV Inverter
CPS SCA20/25KTL-DO
Ver 1.0

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Summary of Contents for Chint Power CPS SCA20KTL-DO

  • Page 1 CPS SCA Series Grid-tied PV Inverter CPS SCA20/25KTL-DO Ver 1.0...
  • Page 2 Web: www.chintpower.com/en Songjiang District, Shanghai, China Email: service.cps@chint.com Zip Code: 201614 Service Hotline: +86-21-37791222-6300 SHANGHAI CHINT POWER SYSTEMS CO., LTD. All rights reserved. Specifications and designs included in this manual are subject to change without notice. CHINT POWER 2013/11-MKT PN: 9.0020.0111A0...

  • Page 3: Table Of Contents

    Table of Contents Before You Start… ................... 1 Chapter 1 IMPORTANT SAFETY INSTRUCTIONS ......... 2 Chapter 2 Overview ................. 6 2.1 Inverter for grid-tied PV systems ..........6 2.2 Product features ................. 6 2.3 Product protection functions ............7 2.4 Circuit structure design ............... 7 2.5 Appearance Description .............
  • Page 4 5.4.2 Alarm .................. 62 5.4.3 History ................62 5.4.4 System configuration ............64 5.4.5 Power dispatch ..............66 5.4.6 AutoTest ................67 5.4.7 System protection parameters setup ........69 5.4.8 System control parameters ..........71 Chapter 6 Operation ................80 6.1 Start-up ..................

  • Page 5: Before You Start

    If you encounter any problems during installation or operation of this unit, first check the user manual before contacting your local dealer or supplier. This user manual is applicable for the following 2 models: CPS SCA20KTL-DO and CPS SCA25KTL-DO. Instructions inside this user manual will help you solve most installation and operation difficulties.

  • Page 6: 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. Warnings and symbols in this document DANGER: DANGER indicates a hazardous situation which, if not avoided, will...
  • Page 7 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.
  • Page 8 WARNING: All the installation and wiring connections should be performed only by qualified technical personnel. Disconnect the inverter from PV modules and the Power Grid before maintaining and operating the equipment. DANGER: Please disconnect the inverter from AC grid and PV modules before opening the equipment.
  • Page 9 grid standard, the electricity supply company may cancel the operation license. Putting the inverter into operation before the overall system complies with the national rules and safety regulation of the application is not permitted.

  • Page 10: Chapter 2 Overview

    Chapter 2 Overview 2.1 Inverter for grid-tied PV systems CPS SCA20/25KTL-DO 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 11: Product Protection Functions

     Long service life: Uses thin-film capacitors to extend inverter’s service life  2 MPPTs: Support independent and parallel modes of PV connection  High protection degree: IP65 protection degree meets the needs of both indoor and outdoor use; Embedded DC switch makes field maintenance more flexible and safer 2.3 Product protection functions ...

  • Page 12: Appearance Description

    FUSE Clip Input ( No FUSE) MPPT1 Switch Output PV1+ PV1+ PV1+ PV1+ PV1+ PV1- PV1- PV1- PV1- PV1- MPPT2 PV2+ PV2+ PV2+ PV2+ PV2+ Three level PV2- PV2- inverter PV2- PV2- PV2- Figure 2-2 Schematic diagram of CPS SCA20/25KTL-DO series inverter 2.5 Appearance Description Figure 2-3 Appearance sketch of CPS SCA20/25KTL-DO series inverter...
  • Page 13 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 6) LCD display 7) Key buttons 8) DC switch: DC power on/off...

  • Page 14: 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 15 M8 Expansion tubes For mounting bracket M8×25 assembling For mounting bracket bolts To connect wiring box with main M6X12 screw housing; 2 spare parts mounting bracket M5X10 screw inverter, external ground connection internal ground stud M5 flange nut connection; 1 spare part Lifting eye nut M10 For lifting the main housing 8 positive and 8 negative...

  • Page 16: Basic Requirements

    INSTRUCTION: The items in the accessory kit table above are for the standard configuration. The accessories may vary if optional parts are purchased. 3.1 Basic requirements  Check that the product environmental specifications (protection degree, operating temperature range, humidity and altitude, etc) meet the requirements of the specific project location.
  • Page 17 please install the shading device above the inverter;  Do not install the inverter near the electromagnetic source which can compromise the normal operation of electronic equipment;  No ice or snow on the inverter; Figure 3-1 Sketch of installation environment...

  • Page 18: Mechanical Installation

    3.2 Mechanical installation 1) Dimensions Figure 3-2 Dimensions of CPS SCA20/25KTL-DO series inverter...
  • Page 19 2) Installation method (see Figure 3-3): Make sure that the mounting structure (wall, rack, etc) is suitable to support the inverter weight. Follow the mounting guidelines below: (a) If the location permits, install the inverter vertically. (b) If the inverter cannot be mounted vertically, it may be tilted backward by no lower than 15 degree from horizontal.
  • Page 20 4) Installation space requirement (see Figure 3-4): The distances between the inverters or the surrounding objects should meet the following conditions: NOTICE: The spacing between two inverters in parallel should be ≥1000mm (39.4 inches). Ensure that the air space around the inverter is well ventilated.
  • Page 21 Figure 3-5 Dimensions of holes on the bearing surface (2) Drill holes at the marked positions with a 10mm drill and put the M8 expansion tubes① into the holes; Fasten the mounting bracket② with the M8x25 assembling bolts③ in the accessory kit. Tool: Electric drill (Ф10mm head), No.
  • Page 22 Figure 3-6 Secure the mounting bracket (3) Hang the inverter onto the mounting bracket as shown in Figure 3-7 and Figure 3-8; Lift mounting: Take out the lifting eye nut M10 (2pcs) from the accessory kit, and screw them on the bolts at the top of the inverter. Use sling rope or bar (inserted through both lifting eye nuts) to lift the inverter onto the bracket.
  • Page 23 2 people to mount the inverter due to the weight of the equipment. Figure 3-7 Mount the main housing on the bracket by lifting Figure 3-8 Position of grab handle...
  • Page 24 (4) Install the wiring box ① Remove the cover plate at the bottom of the main housing. (see Figure 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...
  • Page 25 step 6, Figure 3-13) Tool: No.2 Phillips head screwdriver ③ Insert the wiring box to the main housing, and use M6x12 screws (4pcs) to attach the wiring box to the inverter housing. (see Figure 3-11) 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 SCA20/25KTL-DO series inverter is...
  • Page 26 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 (7) Optional - Install an anti-theft padlock when the installation is complete.
  • Page 27 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: Recommended lock size: A: Ф3~6mm B:20~50mm...

  • Page 28: Electrical Installation

    3.3 Electrical installation The connection interface of CPS SCA20/25KTL-DO series inverter: Do not disconnect under load. 负载状态下，请勿断开连接。 DC INPUT 1 DC INPUT 2 AC OUTPUT 直流输入 1 直流输入 2 交流输出 COMM. PORT ANT. WARNING: 通信接口 天线 High touch current . Earth connection essential before connecting supply.
  • Page 29 5. Wireless communication antenna port (For optional Zigbee communication) 6. AC output terminal block 7. Grounding bar & grounding studs 8. Dry contact communication port 9. USB interface (firmware upgrade by USB disk available) 10. RS485 communication interface (RJ45 connector) 11.
  • Page 30 Table 3-3 Cables specifications Max. Position Cable cable length (m) DC input (﹢/﹣) 2.5~4.0mm PV cable (2.5mm 1) L1/L2/L3/N/PE: Recommend 5X6~16mm cable, ed cable for outer diameter:21~26mm. L1/L2/L3/N/P E:5X10mm H07RN-F 2) L1/L2/L3/N: 4X6~16mm Recommend output cable, ed cable for (10mm (L1/L2/L3/N/PE) outer diameter:21~26mm.

  • Page 31: Dc Connection

    communication 3.3.1 DC connection 1) Working mode CPS SCA20/25KTL-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; Under Independent mode, each PV input section works with one MPP Tracker.
  • Page 32 the J9 & J10 terminal blocks on the fuse board. Put the jumper busbar attached in the accessory kit on the J9 & J10 terminal blocks, and tighten the wire terminals back on the terminal blocks with a torque value of 1.2N.m. Figure 3-20 Internal configuration of parallel mode Set the selector switch on the LCD board (see Figure 3-21) to parallel mode.
  • Page 33 Figure 3-21 Location of the PV connection mode selector switch Selector switch for 1-----independent mode PV connection 2-----parallel mode mode 2) DC fuse selection CPS SCA20/25KTL-DO inverters can be equipped with typical 12A (20kW Inverter) and 15A (25kW Inverter) DC fuses. Customers must verify that the appropriate fuses are used depending on the actual configuration PV strings.
  • Page 34 WARNING: DC fuses should be replaced by qualified personnel for safety reasons. Make sure the inverter is isolated from both the DC and AC sources and check to ensure the hazardous high voltage has been fully discharged before operating on the inverter. 3) DC cable connection To ensure the optimum performance of the inverter, please read the following guidelines before DC connection:...
  • Page 35 Figure 3-22 Polarity check (d) Put the positive (negative) DC cable through the gland and cable fastener, and then crimp the cable with the cord end terminals shown in Table 3-6. Table 3-6 Cord end terminals for DC cables Item Function For Positive DC cable For Negative DC cable...
  • Page 36 Figure 3-23 Assemble male connector on DC positive cable Figure 3-24 Assemble female connector on DC negative cable Remark: Confirm the following points before connecting the DC cables to the inverter: Make sure the PE cable is well connected. Please refer to 3.3.2 for detailed information of ground connection.

  • Page 37: Ac And Ground Connection

    Figure 3-26 Unplug the positive connector Figure 3-27 Unplug the negative connector 3.3.2 AC and ground connection The following describes how to connect the AC output cables and PE cable between the inverter and the AC grid: 1) Use the 3mm Hex screwdriver to screw off the 4 screws on the wiring box and take off the cover.
  • Page 38 depending on the grouding connection method. The cable set-up procedures are illustrated below. Please fasten all the cables and glands after connection. Table 3-7 Necessary tools for cable set up Tools 4mm flat screwdriver 8mm hex socket wrench Diagonal pliers Wire stripping pliers Crimping pliers Table 3-8 Torque value...
  • Page 39 PE cable to the grounding bar. (see the 1 graph in Figure 3-29) Set up the cables referring to Figure 3-30. Pre-insulated end ferrule 5pcs Core wire Pre-insulated end ferrule Figure 3-30 Connect the PE cable to the internal grounding bar （2）...
  • Page 40 grounding point at the bottom of the wiring box. (see the 3 graph in Figure 3-29) Set up the cables referring to Figure 3-32. Pre-insulated end ferrule 4pcs Core wire Pre-insulated end ferrule Ground wire OT type terminal,2pcs Figure 3-32 Connect the PE cable to the external grounding point...
  • Page 41 AC grid through the 4 pole AC breaker to make sure the inverter can be safely disconnected from the AC grid. Please choose the AC breaker referring to Table 3-9: Table 3-9 Specification of AC breaker selection Inverter AC breaker rated current（A） CPS SCA20KTL-DO CPS SCA25KTL-DO...

  • Page 42: Communication Connection

    3.3.3 Communication connection CPS SCA20/25KTL-DO series inverter supports 3 communication methods: RS485, Ethernet and ZigBee. RS485 is the standard communication, the Ethernet and ZigBee cards are optional for users. Each communication method supports firmware upgrade by USB disk. Communication board description S401 S402 Communication board...
  • Page 43 Figure 3-34 Optional communication card Connectors and communication cards Item Picture Configuration description ① Dry Please see the section after the table for contact detailed information. communic ation port P205 N.O. N.C. COM ② USB Firmware upgrade via USB disk port P207 ③/④...
  • Page 44 ⑥ 1-----Disable the termination resistance Selector 2-----Enable the terminal resistor switch for setting the 120Ω terminal resistor of the RS485 communic ation S402 ⑦ 1-----Independent mode Selector 2-----Parallel mode switch for setting the connection mode S401 ⑧ Zigbee ZigBee card supports wireless card...
  • Page 45 communication frequency is 2.480GHz. Network ID is 0xFF. The transmit mode is Master-slave, and the communication baud rate is 9600pbs. Set the baud rate to 9600pbs through LCD operations when installing the Zigbee card. ⑨ The Ethernet card is equipped with an Ethernet Ethernet port for TCP/IP communication.
  • Page 46 N.O. N.C. COM Figure 3-35 Dry contact communication port The voltage and current rating of the dry contact shown in the following table must not be exceeded in any case. Table 3-10 Rating of dry contact Voltage Current Maximum 277 V Maximum 3 A Maximum 30 V Maximum 1 A...
  • Page 47 (or L (or L Line circuit Breaker( 3 A) Line circuit Breaker( 3 A) N.C. N.C. Fault N.O. N.O. N.C. N.C. In operation N.O. N.O. N.C. N.C. In operation N.O. N.O. Light on in trouble free operational Light on in error Figure 3-36 Schematic diagram of dry contact communication 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...
  • Page 48 Figure 3-37 Take out the seal pin b.) Put the dry contact communication cable through the cable gland and inside the wiring box. c.) Use double-layer insulated cables. Strip the cables according to the following requirements. Tool: Wire stripping pliers Figure 3-38 Wire stripping Table 3-12 Cable set-up Position...
  • Page 49 Outer diameter 4.5 mm~ 6 mm Cross-section area of conductor 0.2 mm² ~ 0.75 mm² Length of stripped outer wire skin Maximum 15mm Length of stripped inner wire skin Maximum 7 mm d.) Connect wires to the terminal. Tool: 2 or 2.5mm flat screwdriver Cable Color Function N.O.
  • Page 50 ② RS485 communication cable connection: Figure 3-41 RS485 connection 1. Cable connection of RS485 communication: RJ45 connector 2. Cable connection of RS485 network communication: RJ45 connector 3. Cable connection of RS485 communication: 5 pin connector 4. Cable connection of RS485 network communication: 5 pin connector a.) Screw off the nut of the communication cable gland, and take out the seal pin, as shown in Figure 3-42.
  • Page 51 Figure 3-42 Take out the seal pin b.) Put the RS485 cable through the cable gland and inside the wiring box. Make the cable terminals as shown in Figure 3-43/3-44. Tools: Wire stripping pliers, crimping pliers (for RJ45 connector) Wire stripping pliers, 2 or 2.5mm flat screwdriver (for 5 pin connector) Colour Function White orange 485+...
  • Page 52 1 -----NC 2 -----NC 3 (Red)--------RS485+ 4 (Blue) -------RS485- 5 (Green)-----COM (1) RS485 communication of single inverter (2) RS485 network communication Figure 3-44 Fasten the cable terminal on the RS485 5 pin connector c.) Plug the cable terminal into the corresponding connector. d.) Tighten the nut of the cable gland.
  • Page 53 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. The Daisy-chain topology is recommended for the RS485 network connection, as shown in Figure 3-45.
  • Page 54 ③ Ethernet communication cable connection: Figure 3-46 Ethernet cable connection a.) Screw off the nut of the communication cable gland, and take out one of the seal pins. Figure 3-47 Take out the seal pin...
  • Page 55 b.) Put the Ethernet cable through the cable gland and inside the wiring box. Make the cable terminals as shown in Figure 3-43. Tools: Wire stripping pliers, crimping pliers c.) Plug the cable terminal into the corresponding connector. d.) Tighten the nut of the cable gland. ④...
  • Page 56 Figure 3-48 The ZigBee cable connection...

  • Page 57: Chapter 4 Commissioning

    Chapter 4 Commissioning 4.1 Commissioning Checklist WARNING: Please follow the guidelines below before on-grid operation to eliminate possible dangers to ensure safety. 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. 4.1.2 Cable connections ...
  • Page 58 3.) Switch the DC Switch to the “ON” position. When the energy supplied by 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 59 5 CEI 0-21 → 1 VDE-0126 6 IEEE1547 2 VDE-4105 7 BDEW 3 G59/2 4 C10/11 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.

  • Page 60: 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 61 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 62: 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 63 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 625 V 622 V 23.1 23.1 18.5A 19.3A 223.2 223.2 08/12 13:10:05 08/12 13:10:10 Figure 5-5 Default display interface for normal operation...

  • Page 64: 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 65: 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 66: 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 67 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 68: 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 69 (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 70: Power Dispatch

    4. “MPPTCycle” is used to set up the cycle time of MPPT Scan. Move the cursor to this menu, press ENT to set up the cycle time. Use UP and DOWN to adjust the MPPT cycle time. Press ENT to confirm the setting. 5.

  • Page 71: Autotest

    5.4.6 AutoTest INSTRUCTION: The Autotest is only needed for CEI 0-21 grid standard. The “6 Autotest” appears ONLY when users select the “CEI 0-21” grid standard. Users can do the Class I and Class II protection tests to the grid voltage and frequency by Class I and Class II protection tests.
  • Page 72 Inverter is NOT Running Test Aborted! RadiationTooLow 1 OP.infor 1 VMaxTest1 Select VolMax1Test 2 Alarm 2 VMinTest1 VMaxTest1 Testing... 3 History 3 FMaxTest1 Start? →4 FMinTest1 4 Setting UacMax1 -- V Uac1 -- V 5 Dispatch 5 VMaxTest2 6 Autotest Uacoff1 -- V 6 VMinTest2...

  • Page 73: System Protection Parameters Setup

    5.4.7 System protection parameters setup Press DOWN and ENT at the same time in the main interface and enter the password (UP -> DOWN -> UP -> DOWN) to access the system protection parameters setup menu. This menu includes 5 submenus: “1 SysPara”, “2 Restart”, “3 Recover”, “4 ClrErrRecd”...
  • Page 74 INSTRUCTION: This function is effective only when the fault “IntFault0010~0150” in the troubleshooting table occurs. The inverter may restore to normal operation automatically if alarm or protection faults occur. This function will not respond when the inverter is in operation mode and a “FaultOperated”...

  • Page 75: System Control Parameters

    permitted. 5.4.8 System control parameters The “1 SysPara” menu has 6 submenus, including ”1 GridVProtect”, ”2 GridFProtect”, ”3 ON/OFF”, ”4 PowerContr”, ”5 LVRTSet” ”6 OtherProtect”. (1) ”1 GridVProtect” and ”2 GridFProtect” menus: Set up the parameters of grid voltage, frequency protection and recovery, etc, as shown in Table 5-3: Table 5-3 Parameters of grid voltage and frequency Setup range (lower limit, Parameter name...
  • Page 76 of Max. grid voltage Recovery threshold value GridVminRecT(V) {0, 362.6, 480.0} of Min. grid voltage Recovery time of grid GridVRecT(S) {0, 300.00, 600.00} voltage protection Protection threshold value GridF.Max1(Hz) of Level 1 Max. grid {50.00,51.50, 65.00} frequency Trip time of Level 1 Max. FmaxTripT1(S) {0, 0.10, 600.00} grid frequency...
  • Page 77 Recovery threshold value GridFminRecT(Hz) {45.00, 47.51, 60.00} of Min. grid frequency Recovery time of grid GridFRecT(S) {0, 300.00, 600.00} frequency protection Threshold value of grid GridV.Unbal(%) {0.1, 2.6, 100} voltage unbalance (2) ”3 ON/OFF” menu: Set up the start-up and shut-down control parameters. Table 5-5 Start-up and turn-off control parameters Setup range (lower limit, Parameter name...
  • Page 78 1 None 5 PF(P) Curve → 2 Dispatch 6 Q(U) Curve 3 QReactSet 4 PF Set Figure 5-16 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 79 (PFCurveP1, PFCurvePF1) Capacitive Inductive (PFCurveP2, PFCurvePF2) Figure 5-17 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 5-18. INSTRUCTION: The Q(U) curve function is only available for CEI 0-21 grid standard. Q(%) (QuCurveU1, QuCurveQ1) Inductive...
  • Page 80 The Table 5-6 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. Figure 5-6 Parameters of reactive power control Parameter Setup range (lower limit, Mode Description Name...
  • Page 81 (330.0，358.5，367.0) QuCurveU2i(V) See Figure 5-18 ， QuCurveQ2i(% (-100.0%, -50.1% See Figure 5-18 100.0%) QuCurvTripP curve trip (5.0%，20.0%，100.0%) （%） power QuCurveReP curve (5.0%，5.0%，100.0%) （%） revocation power “FreqDeratCtrl” menu: Set up the parameters of over-frequency active power deraring. Table 5-7 Protection parameters of active power derating (VDE-4105) Setup range (lower limit, Parameter name Description...
  • Page 82 P(%) DeratRatio(=Δ P/ Δ f) Freq(Hz) GridOFDerat1 51.5 Figure 5-19 Over-frequency derating curve (VDE-4105) Remarks: Under CEI 0-21 grid standard, it shows ”GridOFDerat2(Hz)” as the third parameter, the setting range is (50.00, 51.50), and the default value is 51.50. When the grid standard is CEI 0-21, the setting range of trip frequency of over-frequency derating is (50.00Hz，51.50Hz), and the default value is 50.30Hz.
  • Page 83 Table 5-8 Protection parameters of LVRT control Setup range (lower limit, default Parameter name Description & upper limit) LVRT protection LVRTProtect {Ban, Ban,Enable2} enable/disable LVRTVoltLimit(%) LVRT voltage limit {70.0,80.0,90.0} LVRT positive LVRTPosCurrK {0,1.5,100} current K LVRT negative LVRTNegCurrK {0,2.0,100} current K (5) ”6 OtherProtect”...

  • Page 84: 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 85 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 86: Grid-Tied Power Generation

    Standby >>>>>> Figure 6-3 Inverter system in standby mode (4) Fault mode, as shown in Figure 6-4: The inverter will disconnect from the power grid and turn into fault mode when the inverter or power grid fails. Check the specific cause in “Troubleshooting table”...
  • Page 87 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 88: 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 89 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. 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 90 1.Observe for 5 minutes and see whether the alarm 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;...
  • Page 91 Possible causes: 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 92 3.Check whether the cable between the inverter 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;...
  • Page 93 and then turn on the switch again; 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;...
  • Page 94 Air humidity is high Recommended solutions: 1.Observe for 5 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.
  • Page 95 Possible causes: Protection procedure occurs inside the inverter Recommended solutions: 1.Observe for 5 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:...

  • Page 96: 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 98 50~60mm 50~60mm Figure 7-1 Replace cooling fans...

  • Page 99: 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 100 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 101: 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 102: Chapter 8 Technical Data

    Chapter 8 Technical Data Model Name CPS SCA25KTL-DO SCA20KTL-DO DC Input Nominal DC Input Power 21kW 26kW Max. DC Input Power for 12kW 14kW each MPPT Max. DC Input Voltage 1000Vdc Operating DC Input Voltage 300-900Vdc Range Start-up DC Input Voltage / 330V/300W Power Nominal DC Input Voltage...
  • Page 103 70.4A RMS@20ms Rated Output Frequency 50Hz/60Hz Output Frequency Range 47-53Hz/57-63Hz Power Factor >0.99 (± 0.8 adjustable) Current THD <3% AC Disconnection Type System Topology Transformerless Max. Efficiency 98.3% Euro Efficiency 97.8% Stand-by / Night <20W / <2W Consumption Protective Class Overvoltage Category PV (II), Mains(III) Environment...
  • Page 104 BDEW; VDE AR-N-4105/VDE Grid Standard 0126-1-1/A1;CEI 0-21; G83/1/1; G59/2; C10/11 Note 1: When the DC input voltage is lower than 400V or higher than 800V, the inverter begins derating, as shown in Figure 8-1: Po/Pn 100% 100 200 300 400 1000 PV Voltage (V) Figure 8-1 SCA20/25KTL derating curve of PV input voltage...
  • Page 105 Note 3: When the altitude is higher than 2000m, the operating temperature of the inverter needs derating, as shown in Figure 8-3: Tamb(℃) 2000 4000 Altitude(m) Figure 8-3 SCA20/25KTL derating curve with high altitude Note 4: The inverter can output the AC power with full loads under 90%~110% of the rated grid voltage.

  • Page 106: Chapter 9 Quality Assurance

    Chapter 9 Quality Assurance 9.1 Warranty Chint Power provides the standard warranty upon the contract for offshore products, generally with a period of five (5) years which begin from installation, commissioning and acceptance or six (6) months after the delivery of the goods (whichever comes first).

  • Page 107: Quality Clause (Warranty Clause)

    specifications on the product and in its related document;  Application beyond the scope of applicable safety or grid standards (VDE, UL, etc.)  Unexpected disaster or force majeure 9.3 Quality clause (Warranty clause) 1. CPS will repair or replace with new products with malfunctions during the warranty period.

  • Page 108: Chapter 10 Disposal

    Chapter 10 Disposal The dealer or installers should remove the PV Inverter from the array and contact the supplier for disposal instructions. The Inverter must not be disposed of with the household waste. Disposal of the PV-Inverter at the end of its service life should be done in accordance with the disposal regulations for electronic waste which apply at the installation site at that time.

  • Page 109: Appendix: Instruction Of Inverter Selection

    Appendix: Instruction of inverter selection Table A-1 Optional accessory Item Number Note ■CPS SCA20/25KTL-DO Standard inverter □ DC SPD Options Zigbee card ○ Alternative option Enthernet card ○ If you purchased the Zibgee communication function of the inverter, the package will contain the following accessories: Table A-2 Optional accessory Item Number...
  • Page 110 FUSE Clip DC SPD Input ( No FUSE) （Optional） MPPT1 Switch Output PV1+ PV1+ PV1+ PV1+ PV1+ PV1- PV1- PV1- PV1- PV1- MPPT2 PV2+ PV2+ PV2+ PV2+ PV2+ Three level PV2- PV2- inverter PV2- PV2- PV2- LCD and Keys Control Board RS485 Zigbee（Optional）...

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