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CPS SCH275KTL-DO/US-800 User Manual

Grid-tied pv inverter
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USER MANUAL
SCH275KTL-DO/US-800 Grid-Tied PV Inverter
(1.0101.0815/1.0101.0759/1.0101.0792 Models)
CHINT POWER SYSTEMS AMERICA CO., LTD.
Rev 1.2
June 2023

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Summary of Contents for CPS SCH275KTL-DO/US-800

  • Page 1 USER MANUAL SCH275KTL-DO/US-800 Grid-Tied PV Inverter (1.0101.0815/1.0101.0759/1.0101.0792 Models) CHINT POWER SYSTEMS AMERICA CO., LTD. Rev 1.2 June 2023...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents Preface ..................4 IMPORTANT SAFETY INSTRUCTIONS ........5 Warnings and Symbols in this Document ............5 Markings on the Product ..................6 Safety Instructions of Operating the PV Inverter ..........8 Product Introduction ..............11 Inverter for Grid-tied PV Systems ..............
  • Page 3 Table of Contents Commissioning ................45 Pre-commissioning Checks................45 5.1.1 Mechanical Installation..............45 5.1.2 Cable Connections ................45 5.1.3 Electrical Check ................45 Commissioning Steps ..................46 APP Interface and Setting ............47 APP Download ....................47 APP Setting ....................... 47 Structure Tree of App Interface .................

  • Page 4: Preface

    Preface Preface Thank you for choosing a CPS Grid-tied PV Inverter (hereinafter referred to as “PV Inverter”) developed by CHINT POWER SYSTEMS AMERICA CO., LTD (hereinafter referred to as "CPS"). This PV Inverter is a high performance and highly reliable product specially designed for the North American Solar market.

  • Page 5: Important Safety Instructions

    （SAVE THESE INSTRUCTIONS） Please read this user manual carefully before the installation and operation of this PV Inverter. CPS reserves the right to refuse warranty claims for equipment damage if users fail to install the equipment according to the instructions in this manual.

  • Page 6: Markings On The Product

    IMPORTANT SAFETY INSTRUCTIONS indique une situation dangereuse qui, si elle n'est pas évitée, pourrait entraîner un fonctionnement anormal de l'équipement ou la perte de biens. IMPORTANT! INSTRUCTION indicates important supplementary information or provides skills or tips that can be used to help you solve a problem or save you time.
  • Page 7 IMPORTANT SAFETY INSTRUCTIONS WARNING: For continued protection against risk of fire, replace only with same type and ratings of fuse. Refer to instruction manual for details. ATTENTION: Pour continuer d'assurer la protection contre les risques d'incendie, il faut remplacer les fusibles de même type et courant.

  • Page 8: Safety Instructions Of Operating The Pv Inverter

    IMPORTANT SAFETY INSTRUCTIONS Safety Instructions of Operating the PV Inverter DANGER! Disconnect the inverter from PV modules and the AC grid before maintaining and operating the equipment. Make sure hazardous high voltage and energy inside the equipment has been discharged. Do not operate or maintain the inverter until at least 5 minutes after disconnecting all sources from DC and AC sides.
  • Page 9 IMPORTANT SAFETY INSTRUCTIONS IMPORTANT! Please check with your local electricity supply company before selecting a Grid Code. If the inverter is operated with an incorrect grid standard, the electric utility supply company may cancel the interconnection agreement. Placing the inverter into operation before the overall system complies with the national rules and safety regulations of the application is not permitted.
  • Page 10 IMPORTANT SAFETY INSTRUCTIONS holder (when applicable) for each string reading approximately zero amps. If the DC current is higher than 0.25A, do not open the fuse holder (when applicable). When all possible fuses are open, measure each MPPT current. If it is lower than 20A, turn OFF the DC switch.

  • Page 11: Product Introduction

    Product Introduction Inverter for Grid-tied PV Systems CPS 3-Phase String Inverters SCH275KTL-DO/US-800 series are designed for use with an UNGROUNDED PV array in Commercial and Utility scale PV grid-tied systems. The system is generally made up of PV modules, PV inverter and AC power distribution equipment, as shown in Figure 2-1.

  • Page 12: Product Features

    General Introduction Figure 2-3 Product dimensions IMPORTANT! SCH275KTL-DO/US-800 inverter has 36 input (fused) and 24 input (unfused) versions. Both of these versions have similar appearance, similar dimensions and their mounting procedures are also the same. However, their DC connection methods and communication methods are different, hence will be introduced separately in the following contexts.
  • Page 13 General Introduction High protection degree: NEMA Type 4X enclosure meets the demanding needs of both indoor and outdoor use. Intelligent Integration: Integrated load break rated DC disconnect switches; DC switches can be locked out in the OFF position to prevent operation. Up to 36 fused string inputs or 24 unfused inputs eliminate the need for external combiner boxes, simplifying installation.

  • Page 14: Schematic Diagram And Circuit Design

    General Introduction Schematic Diagram and Circuit Design The electrical schematic diagrams of inverter are as shown in Fig. 2-4. DC Switch PV Input MPPT1 DC/AC PV1+ PV2+ LC Filter PV1- AC Relay AC Output PV2- MPPT2 PV3+ PV4+ PV3- PV4- MPPT12 PV23+ AC SPD...

  • Page 15: Product Protection Functions

    External environmental temperature monitoring IGBT power module temperature monitoring Smart Inverter Functions and Default Activation The CPS SCH275KTL-DO/US-800 3-Phase String Inverters employ Smart Inverter (Grid Support) functions in compliance with UL 1741-SA8-SA18 and UL1741-SB standards. The default activation status is indicated below.

  • Page 16: Dc Ground Fault Protection

    General Introduction significantly, which will trigger the inverter to cease operation and disconnect from the grid. DC Ground Fault Protection The inverters include residual current detection GFCI as part of the DC ground fault detection method required by UL 1741. If there is a ground fault in the PV array, the ground fault detection circuitry will detect leakage current, trigger an alarm, and the inverter will cease operation.

  • Page 17: Mechanical Installation

    Mechanical Installation Mechanical Installation Unpacking for Inspection All the delivery items are shipped in one package, which includes the inverter, mounting bracket, four PE accessory bags and one ziploc bag. Before performing installation, check the product for any obvious damages or if the items on the delivery list are complete.

  • Page 18: Pre-Installation Checklist

    LINKIT Pro app Table 3-1 Accessory list IMPORTANT! Additional accessories for the CPS SCH275KTL-DO/US-800 inverters are available and can be purchased separately. Pre-Installation Checklist Check that the product environmental specifications (protection degree, operating temperature range, humidity and altitude, etc.) meet the requirements of the specific project location.
  • Page 19 Metal Conduit Fittings are recommended to prevent propagation. For detailed specification ranges and limits, see Chapter 9. NOTICE: The allowable ambient temperature ranges for the CPS SCH275KTL-DO/US-800 3-Phase String Inverters are defined based on the following conditions: Condition 1: -40°C to 70°C, Inverter not installed, and in storage (in...
  • Page 20 It is advised that customers contact CPS for further advice and to arrange schedule for CPS service personnel to perform inspection of inverter on site. CPS hotline: 855-584-7168...

  • Page 21: Installation Requirements

    Mechanical Installation Installation Requirements 3.1.1 Installation Methods The inverter shall be installed as follows: If the location permits, install the inverter vertically. If the inverter cannot be mounted vertically, it may be tilted backward 0 to15 degrees from vertical. Do not mount the inverter leaning forward. Do not mount the inverter upside down.

  • Page 22: Space Requirements

    Mechanical Installation 3.1.3 Space Requirements The distances between the inverters or the surrounding objects should meet the following conditions: Figure 3-4 Space Requirements A: Keep a proper distance between the inverter and the shelter to ensure good ventilation. B: The inverter can be installed at an angle of 75° ~90° and its back shall not be blocked to ensure good ventilation.

  • Page 23: Installation Procedures

    Mechanical Installation Installation Procedures 3.1.4 Install the Inverter Mark hole-positions on the installation structure (shelter, steel rack, etc.) according to the size of the mounting brackets. Figure 3-5 Hole positions of mounting bracket 23 / 98...
  • Page 24 Mechanical Installation Drill holes with a Ф12mm drill at the marked position, and then fasten the mounting bracket ① on the installation structure with six M10x50 hexagon combination screws ② included in the PE accessory bag. Tools required: 16mm hex socket wrench, torque: 12.5N.m,110 in-lbs. Figure 3-6 Fasten the mounting bracket Hang the inverter onto the mounting brackets by either: Hoist mounting: screw two M10 lifting eyebolts to the studs at the top...
  • Page 25 Mechanical Installation A – Hoist Mounting B – Manual Mounting Figure 3-7 Inverter Mounting Methods CAUTION! The total weight of the inverter is approx. 119 kg (262.4 pounds). Ensure the mounting bracket is properly installed before hanging the inverter on the bracket. It is recommended to have at least 4 people to mount the inverter due to the weight of the equipment.

  • Page 26: Electrical Connection

    Commissioning Electrical Connection Cable Specifications Cable Type Acceptable wire range • 36 fused input: screw clamp fuse holder (wire range: #14 - #8 AWG CU). • 24 non-fused input: screw clamp terminal Use 90℃ Copper (wire range: #14 - #8 and #6 - #4 AWG wire only CU).

  • Page 27: Connect Interfaces And Connection Points

    Commissioning Diagonal pliers Cut cable Wire stripping pliers Remove jacket Crimping pliers Crimp terminal Table 4-2 Tools required and torque values Connect Interfaces and Connection Points In the following section, you will find the connect interfaces, internal connection points, as well as their names, positions etc. 4.1.1 Connection Interfaces The connection interfaces of inverter are as shown in figure 4-1.

  • Page 28: Internal Connection Points

    Commissioning 4.1.2 Internal Connection Points The internal connection points of inverter are as shown in figure 4-2. Figure 4-2a Internal connection points of 36 input inverter ① ① ① Figure 4-2b Internal connection points of 24 input inverter 28 / 98...

  • Page 29: Electrical Cable Connection

    This unit is not provided with a GFDI device for AC ground fault protection. External AC ground fault protection is required by code NEC 2017/2020 Section 250.21 when CPS inverters are connected to Wye Floating or Delta Floating transformer windings. The inverter will provide DC ground Fault detection.

  • Page 30: Grounding

    Commissioning Figure 4-3 Remove the front cover IMPORTANT! It is important to use hand tools (e.g. socket wrench) instead of power drivers or other types of screw drivers. 4.1.3 Grounding IMPORTANT! The following wiring diagrams will take the 36 string input inverter as an example since there are no obvious differences in ground wiring terminals.
  • Page 31 Commissioning Figure 4-4 Internal DC and AC Ground Terminals Figure 4-5 External Ground Cable Connection IMPORTANT! There are no differences on Internal DC and AC Ground Terminals, External Ground Cable Connections, and AC wiring terminals between 24 input inverter and 36 input inverter versions. Therefore, the 36 input inverter is shown as an example in the following section.

  • Page 32: Ac Wiring

    Commissioning 4.1.4 AC Wiring Remove the watertight plug from the AC output of the wiring box to install 3 inch Trade Size conduit and conduit fittings into the hole. Then route the cables through the conduit inside the wiring box. A Circuit Ground should run with the AC Power cables and connected to the internal ground bus.
  • Page 33 Floating and Delta Floating transformer winding configurations. External AC Ground Fault detection is required by code NEC 2017/2020 Section 250.21 when CPS inverters are connected to Wye Floating or Delta Floating transformer windings. The inverter will provide DC Ground Fault...

  • Page 34: Dc Wiring

    Commissioning transformer and other system parameters. • The transformer does not require a static shield. • Up to 20 inverters may be connected in parallel for use with a single transformer. • The recommended maximum voltage-drop on the Inverter to Point of Common Coupling (to the grid) is 2% at full load –...
  • Page 35 Commissioning CAUTION! Disconnect all power sources before replacing fuses. DC Cable Connection To ensure the optimum performance of the inverter, please read the following guidelines before performing any DC connections: Confirm the DC configuration and ensure that the maximum open circuit voltage of the PV modules is lower than 1500VDC under any conditions.
  • Page 36 Commissioning WARNING! A reversed string is extremely hazardous and will result in a blown fuse when the irradiation is high. The voltage across the blown fuse can be as much as two times Voc and could prevent proper fuse operation resulting in a fire. Perform cable connection as per the following steps: Remove the liquid-tight hole plugs from the DC input of the wiring box and install 2 inch Trade Size conduit and conduit fittings into the holes.
  • Page 37 Commissioning Figure 4-9b Connect the DC cable to DC terminal NOTICE! To maximize production, reduce clipping losses, and optimize thermal performance, the DC input power should be distributed across all 12 MPPTs as evenly as possible (e.g. difference in number of strings per MPPT not larger than 1.) NOTICE! The use of ferrules is recommended for all stranded wire connections.

  • Page 38: Communication Cable Connection

    Commissioning Communication Cable Connection 4.1.6 Communication Board Figure 4-10 Communication Board Item names Picture Configuration 6 - RS485_GND (Common) 5 - RS485_B RS485 port 4 - RS485_A 6-pin connector plug 3 - RS485_GND (Common) 2 - RS485_B 1 - RS485_A S2 Selector switch OFF - Disable terminal resistor (set terminal resistor)

  • Page 39: Communication Connection

    4.1.7 Communication Connection The inverter supports industry standard Modbus RS485, Ethernet, and AC-PLC communication modes. AC-PLC communication requires connection of the CPS AC- PLC Kit accessory. RS485 Communication Schematic Diagram Connect RS485 communication cables with the help of 6-pin terminal to 485 communication module, referring to figure 4-11 (1) for a single inverter RS485 communication connection and figure 4-11 (2) for network configuration.
  • Page 40 Commissioning RS485 Network Connection When the inverters are monitored via the RS485 communication, a unique RS485 address for each inverter can be set up through the APP interface. Up to 32 inverters can be connected in a serial fashion in the RS485 communication network. Therefore, the daisy-chain topology (see Figure 4-12) is recommended for the RS485 network connection, which can minimize the noise and bus reflections.
  • Page 41 Commissioning Communication Wiring The detailed steps to perform the communication wiring for a single inverter or a network of inverters are as follows: Open the inverter wire box. Insert the communication cables into the wire box through the knockout holes at the bottom. Conduit and knockouts must be sealed and water- tight to maintain the NEMA 4X rating.

  • Page 42: Install The Linkit Module

    Commissioning IMPORTANT! • It is important to use hand tools (e.g. socket wrench) instead of power drivers or other types of screw drivers. • During installation, it is recommended the cover is in alignment with balanced force to avoid thread damage. •...

  • Page 43: Cable Connection Notices For Joints And Seals

    Commissioning Figure 4-15 Install LINKIT module Cable Connection Notices for Joints and Seals All the electrical cables and communication cables shall be jointed and sealed properly according to the following requirements to ensure their excellent performance and good water tightness. The cable must be vertical to prevent excessive cable stress.
  • Page 44 Commissioning Figure 4-17 Apply fireproof putties After tightening the fastening head, watertight sealants shall be applied on its inner surface and outer surface to avoid loosening or prevent water from entering. Figure 4-18 Apply watertight sealants 44 / 98...

  • Page 45: Commissioning

    Commissioning Before and after tightening the fastening head, check carefully to ensure the watertight gasket is in good condition, i.e. its surface is uniform and unbroken. Figure 4-19 Check watertight gasket Commissioning WARNING! Please follow the guidelines below before performing any on-grid operation to eliminate possible danger.

  • Page 46: Commissioning Steps

    PV array is sufficient, the POWER indicator of inverter will light up. The inverter will then start up and enter the self-check process. Connect to the inverter via the CPS Connect Pro app according to the procedures introduced in section 6.1 APP Download and section 6.2 APP Setting to select the inverter parameter settings.

  • Page 47: App Interface And Setting

    Users can perform the following procedures to set the APP easily. First of all, open your Bluetooth function, and then open CPS Connect Pro APP. Touch Smart Link icon to enter smart link interface and then click Next to enter the Connect to the adapter interface.
  • Page 48 APP Interface and Setting Touch OK icon to finish initialization process during the first commissioning. Set correct inverter parameters, such as Grid Code, PV Link Type, Neutral line, RS485, then click Next button, it will go to home interface Grid Connection Rule: Choose the Grid Code according to the requirements of your local authority.
  • Page 49 APP Interface and Setting When the device screen shows the normal operation status and the RUN light on the LED panel is illuminated, it indicates that the grid connection and power generation are successful. You can now browse through the real-time data in the APP now.
  • Page 50 APP Interface and Setting If the inverter fails to operate normally, the FAULT light will illuminate and the fault information will be shown on the interface. Touching Event icon in the bottom can skip to Event page, you can check the detailed current and history information here.

  • Page 51: Structure Tree Of App Interface

    APP Interface and Setting Structure Tree of App Interface Choose APP function Setup the product Activate a site Manage my site Wifi Setting Password: Password Main menu Chart Setting History Turn ON/OFF Running Data Password: 1111 Warning Running Status Inverter Parameters Read/Write Register Upgrade Firmware Grid Code PV Link Type Neutral Line RS485 Inverter Clock...
  • Page 52 APP Interface and Setting Figure 6-2 Main information on Main Interface In addition, you can see four submenus: Chart, Setting, History and Turn ON/OFF. 52 / 98...

  • Page 53: Chart

    APP Interface and Setting 6.1.1 Chart In the chart sub-menu, you can view the power generation situation at different times, such as Current, Today and Total. These data can also be displayed in Day, Month, Year, shown as below in Figure 6-3. Figure 6-3 power generation screen 6.1.2 Setting...
  • Page 54 APP Interface and Setting Figure 6-4 Setting interface It’s possible to access three submenus on the setting interface: Inverter Parameters, Read/Write Register and Upgrade Firmware. Inverter Parameters Touch the Inverter Parameters tab, you can set the following parameters as required. Figure 6-5 Inverter Parameters 54 / 98...
  • Page 55 APP Interface and Setting IMPORTANT! Check with your local electric supply company before selecting a grid code. If the inverter operates with a wrong grid code, the electric supply company may cancel the interconnection agreement. Read/Write Register In the Read/Write Register interface, you can find the following sub-menus: Protect LVRT/HVRT Others...
  • Page 56 APP Interface and Setting IMPORTANT! The following mobile screenshots show parameters in accordance with IEEE 1547-2018 Grid Code. Protect The Protect interface displays the protect parameters of the AC grid voltage, frequency and recovery, etc. In addition, you can find and set the protection levels of over voltage, under voltage, over frequency and under frequency.
  • Page 57 APP Interface and Setting Figure 6-7 Protection Parameters 57 / 98...
  • Page 58 APP Interface and Setting In addition, the table listed below can provide detailed parameter information for you. Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE Grid Over Voltage Protection Threshold Level 1 GridVoltMax1 {100.00%,135.00%} 110.00% 110.00% 110.00%...
  • Page 59 APP Interface and Setting Threshold Level 3 GridF.Max3 {60, 66} 61.99 61.99 61.99 Max. grid frequency Trip time of Level 3 FrqMaxTripT3 {0, 1310} 0.16 0.32 0.32 Secs Max. grid frequency Level 3 Max. grid GridFrqMax3En {Disable, Enable} Disable Disable Disable frequency protection Grid Under Frequency Protection...
  • Page 60 APP Interface and Setting Trip time of min MinTripVMovAvg voltage move {0, 655.35} Secs average VoltMinMovAvgE min voltage move {Disable, Enable} Disable Disable Disable average enable Voltage Unbalance GridVoltUnbalanc Threshold grid {0.01%, 50%} voltage unbalance GridVoltUnbalanc grid voltage {Disable, Enable} Enable Enable Enable...
  • Page 61 APP Interface and Setting LVRT/HVRT The LVRT/HVRT interface is used to set the LVRT (Low voltage ride through) and HVRT (High voltage ride through) parameters as shown in the following interfaces: Figure 6-8 LVRT/HVRT interface 61 / 98...
  • Page 62 CPS LVRT CPS HVRT 1.40 1.35 1.30 1.25 1.20 1.15 1.10 1.05 PRC-024 1.00 No Trip Zone 0.95 0.90 0.85 0.80 CPS Inverter No Trip 0.75 Zone 0.70 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00...
  • Page 63 APP Interface and Setting In addition, the table listed below can provide detailed parameter information for you. Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE LVRT Threshold LVRT {0%, 100%} LVRTVolt (1,2) (1st or 2nd point) {0%, 100%} Time of LVRT {0, 655.35}...
  • Page 64 APP Interface and Setting {Disable; Enable reactive power Enable, no Enable, no Enable, no output; Enable no reactive reactive reactive HVRTModeSetting HVRT mode setting reactive power power power power output; Enable, output output output active power output } Trigger Voltage of HVRTTripVolt {110%,135%} 110%...
  • Page 65 APP Interface and Setting Others In the others interface, you can find following common parameters shown as below, such as power on delay, Normal Start Power Rate, PV slow start step, DCI protection, ISO protection, as well as Min. and Max. Voltage of MPPT optimizer. 65 / 98...
  • Page 66 APP Interface and Setting Figure 6-11 Others interface 66 / 98...
  • Page 67 APP Interface and Setting In addition, the table listed below can provide detailed parameter information for you. Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE PowerOnDelay Startup delay time {0,1200} Secs ReactivePowerStep Reactive Power Step {0.01%,655.35%} 50.00% 50.00%...
  • Page 68 APP Interface and Setting Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE FANDetectEn fans detection {Disable, Enable} Enable Enable Enable AC surge protection ACSPDDetectEnSet {Disable, Enable} Disable Disable Disable device test Operation over voltage OperationOverVol {100%,135%} 120%...
  • Page 69 APP Interface and Setting Factory Defaults: The manufacturer’s parameter default values can be restored when the inverter is not in operation mode. Otherwise a “Fault Operated” alarm will be indicated. AutoTest: Only for Italian Grid Code. MPPT Scan: This function is used to manually execute the MPPT scan. The device screen will skip to normal operation interface if the MPPT scanning succeeds or remain on the interface if the scanning fails.
  • Page 70 APP Interface and Setting ActivePowerDerating The ActivePower Derating menu is used to set the active power derating parameters, including Active Power Derating, Over Voltage Derating, Over Frequency Derating, etc. Figure 6-16 ActivePower Derating interface You can see the Curve of over voltage derating in figure 6-17 and Curve of over frequency derating in figure 6-18.
  • Page 71 APP Interface and Setting Power Present 0.0%~100.0% Settable Grid Frequency 60.00~72.00Hz GridF.Max1 Settable Figure 6-18 Curve of over frequency derating In addition, the table listed below can provide detailed parameter information for you. Grid code Grid code Grid code Parameter name Description Range Unit...
  • Page 72 APP Interface and Setting The recovery frequency of RecoveryFrq {58.8, 66} 59.95 59.96 60.00 over frequency derating The recovery time of over OvrFrqRecoveryT {0,1200} Secs frequency derating OvrFrqDerating Over frequency derating {Disable, Enable} Enable Enable Disable Mode mode under frequency derating UFDerEn {Disable, Enable} Disable...
  • Page 73 APP Interface and Setting power factor. PF(P) Curve：PF curve mode. Note: The power factor changes according to the power change, as shown in Figure 6-20. (PFCurveP1,PFCurvePF1) Inductive (P%) Capacitive (PFCurveP2,PFCurvePF2) Figure 6-20 PF(P) Curve Mode Q(u) Curve：Q(u) curve mode. Note: The reactive compensation changes according to the grid voltage change, as shown in Figure 6-21.
  • Page 74 APP Interface and Setting Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE PF(P) Power Factor Vs. Power PFpCurveP1 Power of PF(P) point 1 {0,110%} PFpCurvePF1 PF of PF(P) point 1 {-1,1} PFpCurveP2 Power of PF(P) point 2 {0,110%} 100% 100%...
  • Page 75 APP Interface and Setting Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE Reactive power of Q(p) QpCurveQ1 {-66%, 66%} 0.0% 0.0% 0.0% point Q1 Active power of Q(p) QpCurveP2 {0,110%} 50.0% 50.0% 50.0% point P2 Reactive power of Q(p) QPCurveQ2 {-66%, 66%}...

  • Page 76: Event

    APP Interface and Setting LcdLess Basic Parameters The LcdLess Basic Parameters interface is used to set the parameters as below. 500V Figure 6-22 LcdLess Basic Parameters interface The last three registers are configured as standard, i.e. the inverter supports IV curve function, Automatic MdbsAdr assignment function and the Fault recording function.
  • Page 77 APP Interface and Setting Figure 6-23 Event interface 77 / 98...

  • Page 78: More

    APP Interface and Setting 6.1.4 More Figure 6-24 Turn ON/OFF interface Manual Turn ON/OFF: Manual Power ON/OFF is required after Grid Code setting or manual (fault) shut-down. Touch to submenu “More”. Then move the cursor to “Turn ON” to start the inverter, the inverter will start up and operate normally if the start-up condition is met.

  • Page 79: Troubleshooting

    Troubleshooting Troubleshooting LED Indicator Troubleshooting LED display of the inverter is shown as follows: Figure 7-1 LED display of the inverter Indicators and their indications are shown in Table 7-1. LED Icon Name Status Indication PV Energized (control panel starts to Working work) POWER...

  • Page 80: Common Fault And Troubleshooting

    Troubleshooting If the LED light indicates any faults, please perform troubleshooting according to the Table 7-2. LED status Solutions Neither the Power LED nor Turn off the external AC breaker. the LCD screen lights up. Switch the DC switch to OFF position. Check the PV input voltage and polarity.
  • Page 81 Troubleshooting Possible causes: Fan is blocked; Fan service life has expired; Fan socket connecter has poor contact. Recommended solutions: Observe for 5 minutes and see whether the alarm will be eliminated automatically; Check for foreign objects on fan blades; Switch off 3-phase work power supply and then reboot the system;...
  • Page 82 Troubleshooting (Bus over voltage) Wait for 1 minute between OFF and ON for all energy to discharge. If inverter cannot clear fault, replace inverter. Raise limit of IDCmax (for example, 400mA) to allow inverter more room to adjust in transient condition to cope Protect0070 with imbalance of impedance and voltage between Grid phases...
  • Page 83 Troubleshooting Raise limit of DCImax (for example, 400mA) to allow inverter more room to adjust in transient condition to cope with imbalance of impedance and voltage between Grid Protect0170 phases (High DCI) After raising limit, if inverter cannot clear fault, replace inverter.
  • Page 84 Troubleshooting (BUS over voltage Wait for 1 minute between OFF and ON for all energy to (firmware)) discharge. If inverter cannot clear fault, replace inverter. Restart inverter by recycle both AC and DC switches. Protect0100 Wait for 1 minute between OFF and ON for all energy to (Sensor fault of discharge.
  • Page 85 Troubleshooting Restart inverter by recycle both AC and DC switches. Fault0130 Wait for 1 minute between OFF and ON for all energy to (Bus over total discharge. voltage) If inverter cannot clear fault, replace inverter. Raise limit of IDCmax (for example, 400mA) to allow inverter more room to adjust in transient condition to cope Fault0110 with imbalance of impedance and voltage between Grid...
  • Page 86 Troubleshooting (Open-loop self- Wait for 1 minute between OFF and ON for all energy to check failure) discharge. If inverter cannot clear fault, replace inverter. Table 7-3 Troubleshooting list DANGER! Please disconnect the inverter from AC grid and PV modules before opening the equipment.

  • Page 87: Maintenance

    Maintenance Maintenance DANGER! Before starting any product maintenance, the inverter should be stopped running, the AC circuit breaker connected to the grid and the PV input on the DC side shall be all disconnected, and then wait at least 5 minutes before starting any operation.
  • Page 88 Maintenance Figure 8-1 Remove the fan tray and fan Disconnect the watertight cable connector from cooling fan, as shown in Figure 8-2. Figure 8-2 Disconnect the watertight cable connector Use a No.2 Phillips head screwdriver to remove the 4 screws fixing every fan.

  • Page 89: Replace The Inverter

    Maintenance Figure 8-3 Replace cooling fans Place the new cooling fans on the fan tray, and fasten the cable on the fan tray with cable ties. Tools required: No.2 Phillips head screwdriver, torque value: 14~18kgf.cm Reinstall the assembled fans onto the inverter. Tools required: No.2 Phillips head screwdriver, torque value: 16kgf.cm.

  • Page 90: Technical Data

    Technical Data Technical Data Datasheet Model No. CPS SCH275KTL-DO/US-800 DC Input Nominal input power 285 kW/260 kW Max input voltage 1500Vdc MPPT full load operating input 900-1300Vdc voltage range MPPT voltage range 500-1450Vdc PF>0.99 Turn on voltage/Power 550V/500W Nominal input voltage...
  • Page 91 Technical Data System parameters Topology Transformerless Maximum efficiency 99.0% China efficiency 98.5% Standby/Night loss <5W Environmental parameters Protection level NEMA TYPE 4X Cooling method Variable speed cooling fans Operating temperature -22°F to +140°F / -30°C to +60°C (derating from +107°F / +42°C) Operating humidity 0-100%, No condensation Operating altitude...
  • Page 92 Technical Data INPUT VOLTAGE DERATING SCH275KTL Vac=800V 42℃ 45℃ 50℃ 1000 1050 1100 1150 1200 1250 1300 1350 1400 1450 1500 1550 INPUT VOLTAGE (VDC) Figure 9-1 Derating curve with DC input voltage When the grid Voltage is within 100%~110% of the rated output voltage, the inverter output power may reach 100%.
  • Page 93 Technical Data Po/Pn 100% Tamb( ) Figure 9-3 Derating curve with high temperature The highest no-derating working altitude level is 2500m for this inverter, its derating situation is as shown in Figure 9-4. ALTITUDE DERATING SCH275KTL 42℃ 45℃ 50℃ 1000 1500 2000 2500...
  • Page 94 Technical Data P-Q Capabilities at Nominal Output Voltage Inverter is capable providing reactive power of ±165kVAR at nominal grid voltage and rated ambient temperature. Chart below details inverter reactive power capabilities at various input voltages and various ambient temperature condition. P-Q CURVE SCH275KTL 50℃...

  • Page 95: Measurement Tolerance

    ±5% for real-time measurements with output power below 20% nominal power ±3% for real-time measurements with output power above 20% nominal power ±4% for all statistical data CPS inverter tolerances are specified as below: Voltage tolerances: ±1% Current tolerances: ±2% Frequency tolerances: ±0.01Hz...

  • Page 96: Limited Warranty

    The warranty policy of this product is specified in the contract; otherwise, the standard warranty is 5 years. For service, Chint Power Systems America will provide technical support. For warranty terms, please refer to the CPS America standard warranty policy in place at time of purchase. 96 / 98...

  • Page 97: Recycling

    Recycling Recycling Distributors or installers should contact the inverter manufacturer after removing the inverter from the photovoltaic module and follow the instructions. The inverter cannot be disposed of as household waste. When the inverter's service life expires, please dispose of it in accordance with the electrical waste disposal laws applicable to the installation location.
  • Page 98 CHINT POWER SYSTEMS AMERICA CO., LTD. Address: 1380 Presidential Drive, Richardson Texas 75081 Service Hotline: 855-584-7168 Email: AmericaSales@chintpower.com Website: 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 This manual is subject to change without prior notification.

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