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CPS SCA36KTL-DO/US Installation And Operation Manual

Grid-tied pv inverter
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CPS SCA Series Grid-tied PV Inverter
CPS SCA36KTL-DO/US
Installation and Operation Manual
SHANGHAI CHINT POWER SYSTEMS CO., LTD.

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Summary of Contents for CPS SCA36KTL-DO/US

  • Page 1 CPS SCA Series Grid-tied PV Inverter CPS SCA36KTL-DO/US Installation and Operation Manual SHANGHAI CHINT POWER SYSTEMS CO., LTD.

  • Page 2: Table Of Contents

    Table of Contents Before You Start… ..................1 Chapter 1 IMPORTANT SAFETY INSTRUCTIONS ........2 Chapter 2 Overview ..................5 2.1 Inverter for grid-tied PV systems ........... 5 2.2 Product features ................5 2.3 Product protection functions ............6 2.4 Circuit structure design ..............6 2.5 Appearance Description ..............
  • Page 3 5.4.3 History ................... 61 5.4.4 System configuration ............. 63 5.4.5 Power dispatch ..............66 5.4.6 System protection parameters setup ........66 5.4.7 System control parameters ........... 68 5.4.8 Arcing fault current interruption ..........75 Chapter 6 Operation ................... 77 6.1 Start-up ..................77 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 Do not connect the AC output of this equipment directly to any private AC power equipment. CAUTION: CPS SCA36KTL-DO/US inverter is approx 66kg (145 pounds). Please ensure the mounting is properly installed before hanging the the inverter on the bracket.

  • Page 8: Chapter 2 Overview

    Chapter 2 Overview 2.1 Inverter for grid-tied PV systems CPS SCA36KTL-DO/US 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

    Module temperature monitoring Arc Fault Circuit Interruption 2.4 Circuit structure design The basic schematic diagram of CPS SCA36KTL-DO/US inverter is shown in Figure 2-2. The input of PV modules passes through surge protection circuitry, DC EMI wave filter, and the front-end boost circuitry to achieve maximum power...

  • Page 10: Appearance Description

    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 SCA36KTL-DO/US inverter 2.5 Appearance Description 5 6 7 Figure 2-3 Appearance sketch of CPS SCA36KTL-DO/US inverter...
  • Page 11 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 9) AC switch: AC power on/off...

  • 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 Item Q’ty Note Main housing of the PV inverter Wiring box of the PV inverter...
  • Page 13 For wiring box and main housing; 2 M6 X16 screw spare parts 8 for mounting bracket and inverter, M5X10 screw external ground connection; 2 for install- ing jumper busbar. For internal ground stud connection; 1 M5 flange nut spare part Lifting eye nut M10 For lifting the main housing OT type terminal...

  • Page 14: Recommendations Before Installation

    purchased. 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; Ensure that the local electricity supply authority has granted permission to connect to the grid;...

  • Page 15: Mechanical Installation

    3.2 Mechanical installation 1) Dimensions Figure 3-1 Dimensions of CPS SCA36KTL-DO/US 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: (a) If the location permits, install the inverter vertically.
  • 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 enlarged 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 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.) (43.3in) Figure 3-5 Dimensions of holes on the bearing surface...
  • 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 SCA36KTL-DO/US inverter is about 55kg (≈122 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 SCA36KTL-DO/US inverter is about 66kg (146 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) Figure 3-16 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: Electrical Installation

    3.3 Electrical installation The connection interface of CPS SCA36KTL-DO/US inverter: Figure 3-17 : Full view of wiring box with options. 20.7in(525mm) 19.1in(485mm) 18.7in(475mm) 14.8in(377mm) 10.1in (257mm) 5.4in (137mm) DC INPUT AC OUTPUT COMM. PORT WARNING: High touch current . Earth connection essential before connecting suppl y .
  • Page 28 9 10 Figure 3-19 Internal connection points ① Knockout holes for DC input cable, 1-1/4inch Knockout hole for AC output cable, 1-1/4inch ② Knockout hole for communication cable, 3/4inch ③ External ground connection point ④ Side hole for DC input cable,1-1/4inch ⑤...

  • Page 29: Dc Connection

    Belden 3106A) 3.3.1 DC connection 1)Working mode CPS SCA36KTL-DO/US 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 3-20) Under Parallel mode, the two PV input sections share one MPP Tracker;...
  • Page 30 value of 1.6N.m(see Figure 3-21b) 4. Set the selector switch on the LCD board (see Figure 3-20) to parallel mode. 5. Reinstall the protection cover (see Figure 3-21c). Figure 3-21(a) Jumper busbar Figure 3-21(b)
  • Page 31 Figure 3-21(c) S401 S403 S402 Figure 3-22 Location of the PV connection mode selector switch...
  • Page 32 2-----parallel mode 2) DC fuse configuration CPS SCA36KTL-DO/US inverters are equipped with standard 15A (36kW 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 33 Note 3:The fuse holders can also accept a 20A, 25A and a 30A fuse for combined input strings if needed. CPS doesn’t provide these fuses, but customer can replace with appropriate fuse in field.
  • Page 34 IN1+ PV1+ 1MPPT- IN1- PV1- Parallel Inverter Mode IN2+ PV2+ Bypass Fuse IN2- PV2- Current DC cable 4~2AWG Fuse Rare 2 strings configuration IN1+ PV1+ 2MPPT- IN1- PV1- Independent Inverter Mode IN2+ PV2+ Bypass Fuse IN2- PV2- IN1+ PV1+ 1MPPT- IN1- PV1- Parallel...
  • Page 35 DC cable 8~2AWG Fuse Common 4 strings configuration PV1+ IN1+ 2MPPT- PV1- IN1- Independent Inverter PV2+ IN2+ Mode PV2- IN2- PV1+ IN1+ 1MPPT- PV1- IN1- Parallel Inverter PV2+ IN2+ Mode PV2- IN2- Current 17.5A DC cable 12~10AWG Common 5 strings configuration IN1+ PV1+...
  • Page 36 PV1+ IN1+ 1MPPT- PV1- IN1- Parallel Inverter IN2+ PV2+ Mode PV2- IN2- Current 14.0A DC cable 14~10AWG Common 6 strings configuration IN1+ PV1+ 2MPPT- IN1- PV1- Independent Inverter IN2+ PV2+ Mode PV2- IN2- PV1+ IN1+ 1MPPT- IN1- PV1- Parallel Inverter PV2+ IN2+ Mode...
  • Page 37 PV1+ IN1+ 2MPPT- IN1- PV1- Independent Inverter IN2+ PV2+ Mode IN2- PV2- IN1+ PV1+ 1MPPT- IN1- PV1- Parallel Inverter PV2+ IN2+ Mode PV2- IN2- Current 10.0A DC cable 16~10AWG...
  • Page 38 Common 8 strings configuration 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 8.7A DC cable 16~10AWG Note 1: The temperature rating of the input wirings should be no less than 90℃(194℉).
  • Page 39 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 3-23 Polarity check (e) Knock out the holes of the DC side and plug the suitable conduits of 1-1/4 inch through the holes.

  • Page 40: Ac And Ground Connection

    Figure 3-25(a) Connection of DC input cables Figure 3-25(b) Connection of DC input cables 3.3.2 AC and ground connection The following describes how to connect the AC and ground cables between the inverter and the AC grid : 1) Use No.3 Phillips head screwdriver to screw off the 4 screws on the wiring box and take off the cover.
  • Page 41 Figure 3-26 Take off the cover of the wiring box Table 3-7 Cables specifications 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 1.6 N-m Internal grounding stud 1.6 N-m...
  • Page 42 COMM. PORT WARNING: High touch current . Earth connection esse before connecting sup For more details please see the user manual. Figure 3-27(a) AC output and ground cable connection...
  • Page 43 COMM. PORT WARNING: High touch current . Earth connection esse before connecting sup For more details please see the user manual. Figure 3-27(b) AC output and ground cable connection Pre-insulated end ferrule 4pcs Core wire Pre-insulated end ferrule Figure 3-28 AC output and ground cable set up （1）...
  • Page 44 OT type terminal to connect the ground cable to the internal grounding stud inside the wiring box. (see the 2 graph in Figure 3-27) Set up the cables referring to Figure 3-29. Pre-insulated end ferrule 3pcs OT type terminal,1pcs Core wire Pre-insulated end ferrule Core wire OT type terminal...
  • Page 45 The maximum breaker size allowed is 65A. A smaller breaker may also be used,keeping in mind that a smaller breaker may result in nuisance trips. Table 3-9 Specification of AC breaker selection AC breaker rated current（A） Inverter CPS SCA36KTL-DO/US...

  • Page 46: Communication Connection

    3.3.3 Communication connection CPS SCA36KTL-DO/US inverter supports industry standard Modbus RS485 communication. Communication board description S401 S403 S402 Figure 3-31 Communication board Connectors and communication cards Table 3-10 Communication connection interfaces Item Picture Configuration description ① Please see the section after the table for detailed contact information.
  • Page 47 ② USB Firmware upgrade via USB disk port 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 48 ation S402 1-----Independent mode ⑦Selector 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 49 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 50 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 51 d.) Connect wires to the terminal. Tool: 2 or 2.5mm flat screwdriver Cable Color Function N.O. Blue N.C. Green Figure 3-35 Wire connection e.) Plug the cable terminal into the P205 connector. Figure 3-36 The dry contact communication cable connection...
  • Page 52 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 3-37 RS485 connection 1. Cable connection of RS485 communication: RJ45 connector 2.
  • Page 53 Colour Function White orange 485+ Orange White green 485- Blue N.C. White blue N.C. Green N.C. White brown COM Brown Figure 3-38 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 54 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 55: 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 Make sure that all cables are connected to the right terminals.
  • Page 56 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 57 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. 720 V 725 V 21.5 21.2...

  • Page 58: 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 59 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 60: 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 61 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 729 V 730 V 20.5 20.2 14.2A 14.0A 223.2 223.2 08/12 13:10:10 08/12 13:10:05 Figure 5-5 Default display interface for normal operation...

  • Page 62: 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 63: 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 64: Alarm

    Remarks：The LCD display is shown as follows when PV parallel mode is selected. 453.0V 18.7A 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 65 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 66: 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 67 (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 68 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 if： 1) In parallel mode, the total input power is lower than 90% of the active power in parallel mode.

  • Page 69: Power Dispatch

    and DOWN to adjust the parameters. 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”...
  • Page 70 1 GridVProtect 2 GridFProtect 3 ON/OFF 4 PowerContr 5 LVRTSet 6 OtherProtect Pls Input Pwd →1 SysPara. **** 2 Restart 3 Recover Are You Sure ? 4 ClrErrRecd 5 StdSet Initialization? Pwd Error Pls Input Again **** Wrong Pwd Restarting.. Recovering..

  • Page 71: System Control Parameters

    Please refer to the “6.2 Manual shutdown” to turn off the inverter. INSTRUCTION: CPS SCA36KTL-DO/US 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 72 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 73 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 74 SoftStep(KW/S) Soft step {0.01,1.44,2.88} {Disable, Disable, SoftOffOption Soft turn off option Enable} OffPStep(KW/S) Turn off power step {0.01, 2.16,2.88} IsoResis(KOhm) Isolation resistance {10.0, 250.0 1000.0} GridReStep(KW/S) Grid fault recovery step {0.01, 0.05, 2.88} (3) ”4 PowerContr” menu: relative functions of active, reactive power control and over-frequency derating, including “ActiveContr(%)”, “RePowerContr”...
  • Page 75 Note: The ActivePower, PF and Q value can be adjusted by remote software if the “Dispatch” is selected. 3). QReactSet： Set the Q value Note: Change the reactive power by adjusting the Q value (reactive compensation) 4). PF Set： Set the PF value Note: Change the reactive power by adjusting the PowerFactor 5).
  • Page 76 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. – Figure 5-17 Q(U) curve mode The Table 5-5 lists the parameters of QReactSet, PF Set, PF(P) Curve and Q(U) Curve modes.
  • Page 77 PFCurvePF1 (-0.800, 1.000, 0.800) See Figure 5-17 PFCurveP2(%) (0, 100.0%, 100.0%) See Figure 5-17 PFCurvePF2 (-0.800, -0.900, 0.800) See Figure 5-17 PF curve trip PFCurvTripV(V) (480.0, 480.0, 528.0) voltage PF curve revocation PFCurveReV(V) (422.4, 432.0, 480.0) voltage QuCurveU1(V) (480.0, 518.4, 528.0) See Figure 5-18 QuCurveQ1(%) (-100.0%, 0.0%, 100.0%)

  • Page 78: Arcing Fault Current Interruption

    Max. limit 5.4.8 Arcing fault current interruption CPS SCA36KTL-DO/US 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. This fault can only be cleared by manual operation.
  • Page 79 MPPT Scan AFCI Test Testing Figure 5-19 AFCI test MPPT Scan AFCI Fault AFCI Test TestFinish Figure 5-20 AFCI test result 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.

  • Page 80: 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 81 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 82: Grid-Tied Power Generation

    DC and AC. 6.4 Grid-tied power generation CPS SCA36KTL-DO/US 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 PV array...
  • Page 83 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 84: 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 85 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 86 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 87 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 88 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 89 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 90 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 91 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 92: 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 94 50~60mm 50~60mm Figure 7-1 Replace cooling fans...

  • Page 95: 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 96 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 97: 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 98: Chapter 8 Technical Data

    Chapter 8 Technical Data Model Name CPS SCA36KTL-DO/US DC Input Max. PV Power 54kw Nominal DC Input 37kW Power Max. DC Input Voltage 1000Vdc Operating DC Input 240-950Vdc Voltage Range Start-up DC Input 330V/300W Voltage / Power Number of MPP...
  • Page 99 Current THD <3% AC Disconnection Type Load rated AC switch System Topology Transformerless Max. Efficiency 98.4% CEC Efficiency 98.0% Stand-by / Night <30W / <3W Consumption Environment Protection Degree TYPE 4X Cooling Variable speed cooling fans Operating Temperature -13°F to +140°F / - 25°C to +60°C (derating from Range +113°F / +45°C) Operating Humidity...
  • Page 100 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% 500(540) 1000 PV Voltage (V) Figure 8-1 SCA36KTL derating curve of PV input voltage Note 2: When the ambient temperature is higher than 113℉...
  • Page 101 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 Figure 8-3 SCA36KTL 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 102: Chapter 9 Limited Warranty

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

  • Page 103: Appendix: Instruction Of Inverter Selection

    Number Note Standard ■CPS SCA36KTL-DO/US inverter □ Ethernet card Options □ 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 SCA36KTL-DO inverter with optional components...
  • Page 104 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 105 Figure A-4(a) Figure A-4(b) Figure A-5(a)
  • Page 106 Figure A-5(b) Figure A-6 CHINT POWER SYSTEMS AMERICA CO., LTD.
  • Page 107 CHINT POWER SYSTEMS AMERICA CO., LTD. Address: 700 International Parkway Web: www.chintpower.com/na Suite 102 Email: americasales@chintpower.com Richardson TX 75081 Service Hotline: 855-584-7168 SHANGHAI CHINT POWER SYSTEMS CO., LTD. All rights reserved. Specifications and designs included in this manual are subject to change without notice. CHINT POWER 2015/05-MKT PN: 9.0020.0119D0...

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