CPS SCH350KTL-DO/US-800 User Manual
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CPS SCH350KTL-DO/US-800 User Manual

Grid-tied pv inverter
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SCH350KTL-DO/US-800 Grid-Tied PV Inverter
USER MANUAL
CHINT POWER SYSTEMS AMERICA CO., LTD.
Rev 1.3
Mar., 2024

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Summary of Contents for CPS SCH350KTL-DO/US-800

  • Page 1 SCH350KTL-DO/US-800 Grid-Tied PV Inverter USER MANUAL CHINT POWER SYSTEMS AMERICA CO., LTD. Rev 1.3 Mar., 2024...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents IMPORTANT SAFETY INSTRUCTIONS ........7 Warnings and Symbols in this Document ........... 7 Markings on the Product ................9 Safety Instructions of Operating the PV Inverter ........11 Product Introduction ..............15 Inverter for Grid-tied PV Systems ............. 15 Product Appearance and Dimensions ............

  • Page 3: Table Of Contents

    Table of Contents Connection Interfaces and Connection Points ......... 33 4.3.1 Connection Interfaces ..............33 4.3.2 Internal Connection Points ............... 34 Electrical Cable Connection ..............35 4.4.1 Grounding ..................37 4.4.2 AC Wiring and internal grounding ............ 39 4.4.3 DC Wiring ..................42 Communication Cable Connection ............
  • Page 4 Table of Contents Common Fault and Troubleshooting ............99 Maintenance ................110 Check Electrical Connections ..............110 Clean the Air Vent Inlet ................110 Replace the Cooling Fans ............... 111 Replace the Inverter ................113 Technical Data ................114 Datasheet ....................114 P-Q Capabilities at Nominal Output Voltage ...........
  • Page 5 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 6 Preface Copyrights CPS reserves all rights in this manual. Any reproduction, disclosure or copy in whole or in part is forbidden without prior written authorization. CPS does not accept any responsibility whatsoever for potential errors or possible lack of information in this document.

  • Page 7: 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 8 IMPORTANT SAFETY INSTRUCTIONS CAUTION! CAUTION indicates a hazardous situation with low level of risk which, if not avoided, could result in minor or moderate injury. AVERTIR! ATTENTION indique une situation dangereuse avec un faible niveau de risque qui, si elle n'est pas évitée, pourrait entraîner des blessures mineures ou modérées.

  • Page 9: Markings On The Product

    IMPORTANT SAFETY INSTRUCTIONS Markings on the Product Symbols Meanings WARNING: Risk of Electric Shock. ATTENTION: Risque de choc electrique. CAUTION: Risk of electric shock from energy stored in capacitor. Do not remove cover until 5 minutes after disconnecting all sources of supply. ATTENTION: Risque de choc électrique à...
  • Page 10 IMPORTANT SAFETY INSTRUCTIONS Ce symbole marque l'emplacement d'une borne de mise à la terre, qui doit être solidement connectée à la terre via le câble PE (mise à la terre de protection) pour assurer la sécurité de fonctionnement. RoHS SYMBOL In accordance with 2011/65/EU regulations, the inverter imposes restrictions on the use of specific hazardous substances in electrical and electronic equipment.

  • Page 11: 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 12 IMPORTANT SAFETY INSTRUCTIONS NOTICE! This inverter is designed to connect AC power only to the public grid. Do not connect the AC output of this equipment directly to any private AC power equipment. The inverters are to be installed with floating or ungrounded PV arrays only.
  • Page 13 IMPORTANT SAFETY INSTRUCTIONS If there is a fault and it is safe to access the inverter: Read/record the fault code(s) displayed on the APP interface. Turn OFF the inverter via the APP or Remote access. Turn OFF the AC feed breaker or AC fuse switch disconnect. If possible, read the DC MPPT currents displayed on the APP interface: If the MPPT current is lower than 25A or the irradiation is obviously low, turn OFF the DC switches.
  • Page 14 IMPORTANT SAFETY INSTRUCTIONS If there is a fault and it is unsafe to access the inverter: Notify someone else. Initiate emergency mitigation plan if necessary. If smoke or fire exists, procure a fire extinguisher. If a fire has escaped the inverter enclosure – notify 911 immediately! Turn OFF the AC feed breaker as soon as possible/safe.

  • Page 15: Product Introduction

    Product Introduction Inverter for Grid-tied PV Systems CPS 3-Phase String Inverters 350KTL-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 16: Product Features

    ISO-NE, and HECO; Reactive power; PF value: ±0.8, and optional local or remote Active Power Curtailment. ⚫ Flexible communication: Supports standard CPS Modbus RS485, SunSpec Modbus, Ethernet TCP/IP, CAN and AC-PLC communications to ensure compatibility with 3rd party monitoring and control systems.

  • Page 17: Schematic Diagram And Circuit Design

    PV4- MPPT15 PV29+ AC SPD PV30+ PV29- PV30- DC SPD Figure 2-4 CPS 350KTL Inverter Schematic Diagram Product Protection Functions ⚫ AC and DC short circuit protection ⚫ AC output voltage and frequency monitoring ⚫ Leakage current to ground monitoring ⚫...

  • Page 18: Smart Inverter Functions And Default Activation

    General Introduction Smart Inverter Functions and Default Activation The CPS 350KTL-DO/US-800 3-Phase String Inverters employ Smart Inverter (Grid Support) functions in compliance with UL1741-SB standards. The default activation status is indicated below. Smart Inverter Function IEEE1547-2018 Rule 21 ISO-NE Anti-islanding...

  • Page 19: Anti-Islanding Detection

    General Introduction Anti-islanding Detection The inverter includes Anti-Islanding detection as required by UL1741/IEEE1547. The inverter will continuously make bi-directional perturbations to the frequency of the output current by injecting a small amount of reactive power to detect a possible islanding condition. If the grid is stable, these small perturbations will have negligible effects on the system voltage frequency.

  • Page 20: Mechanical Installation

    Mechanical Installation Mechanical Installation Unpacking for Inspection Before unpacking, check whether the packaging box and all safety signs, warning labels, and nameplates on the packaging box and the product are intact. These signs must always be clearly visible and cannot be removed or covered until the product is scrapped.
  • Page 21 For AC terminal block M12 flat gasket M10 nut M10 spring washer For mounting bracket. M10 flat gasket M12 Lifting eyebolt Table 3-1 Accessory list IMPORTANT! Additional accessories for the CPS 350KTL-DO/US-800 inverters are available and can be purchased separately. 21 / 123...

  • Page 22: Pre-Installation Checklist

    Mechanical Installation 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. ⚫ Make sure that the power grid voltage is within the normal range of the Grid Code chosen.
  • Page 23 DC and AC power connected to the inverters under normal operation. The CPS inverter enclosures are designed to conform to NEMA4 (or IP65), however there exists the possibility of water condensation inside the inverter enclosure when it is left exposed to an outdoor environment without power to operate for an extended period.

  • Page 24: Installation Requirements

    Without inspection, customers will run the risk of having inverter electronic circuit damage when power is applied to inverter during startup. It is advised that customers contact CPS for further advice and to arrange schedule for CPS service personnel to perform inspection of inverter on site.

  • Page 25: Installation Angles

    Mechanical Installation Figure 3-2 Inverter Mounting Suggestion 3.3.2 Installation Angles 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.

  • Page 26: Acceptable Installation Modes

    Mechanical Installation 3.3.3 Acceptable installation modes The distances between the inverters or the surrounding objects should meet the following conditions: Figure 3-4 Space Requirements A: The inverter can be installed at an angle of 15°and its back shall not be blocked to ensure good ventilation.

  • Page 27: Installation Procedures

    Mechanical Installation Installation Procedures Mark hole-positions on the installation structure (shelter, steel rack, etc. according to the size of the mounting brackets. ⚫ Marking illustration for single inverter: NOTICE! Reserve enough space to ensure ventilation and heat dissipation for Installation. Figure 3-6 Marking illustration for single inverter ⚫...
  • Page 28 Mechanical Installation Figure 3-7 Hole positions of mounting bracket in horizontal installation scenarios Drill holes with a Ф12mm drill at the marked position. Lead six M10x50 hexagon combination screws ④ through the screw holes of mounting bracket ⑤ and then fasten these screws with M10 flat washer③, M10 spring washer ②...
  • Page 29 Mechanical Installation Figure 3-9 Hoist mounting 29 / 123...
  • Page 30 Mechanical Installation Manual mounting: At least four people are needed to properly lift the inverter by the four handles and supporting positions marked by the arrows in Figure 3-10, and mount the inverter onto the mounting bracket. 30 / 123...
  • Page 31 Mechanical Installation Figure 3-10 Manual Mounting CAUTION! The total weight of the inverter is approx. 143 kg (315.3 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 32: Electrical Connection

    Electrical Connection Electrical Connection Cable Specifications Cable Type Acceptable wire range Use 90°C copper wire only #14 - #8 AWG*. Terminals are 90C rated. Outdoor copper core wire Phase wire diameter/2. L1~L3: either 300~750kcmil copper wire or 500kcmil~750kcmil aluminum wire; Use 90°C Cu/Al wire PE: Phase wire diameter/2;...

  • Page 33: Connection Interfaces And Connection Points

    Electrical Connection Connection Interfaces and Connection Points In the following section, you will find the connection interfaces, internal connection points, as well as their names, positions etc. 4.3.1 Connection Interfaces The connection interfaces of inverter are as shown in figure 4-1. Figure 4-1 Connection interfaces Item name Four Knockouts for DC inputs (2 inch opening)

  • Page 34: Internal Connection Points

    Electrical Connection • Before the first power-on operation or before running inverter after a long period of non-operation (6-12 months), check if the water-sensitive label in the bottom left corner of the AC & DC wire-boxes and on the capacitive plate have turned red. Never power on the inverter if any water-sensitive label has turned red.

  • Page 35: Electrical Cable Connection

    This unit is not provided with a GFDI device for AC ground fault detection. External AC ground fault protection may be required by code NEC 2017/2020 Section 250.21 when CPS inverters are connected to Wye Floating or Delta Floating transformer windings.
  • Page 36 Electrical Connection Figure 4-4 Remove side cover of AC wire box Pull out the free end of support rod which is built in the side cover, rotate and insert it into the fixing hole, to ensure the side cover will not swing during wiring operation. Figure 4-5 Support the side cover of AC wire box IMPORTANT! It is important to use hand tools (e.g.

  • Page 37: Grounding

    Electrical Connection 4.4.1 Grounding There are three kinds of grounding methods for this inverter in total: internal DC grounding (via DC grounding terminal in DC wire box, as fig. 4-6), internal AC grounding (via AC grounding terminal in AC wire box, as fig. 4-7) as well as external grounding (via external grounding hole on inverter enclosure, as fig.
  • Page 38 Electrical Connection Figure 4-7 Connect to AC grounding terminal Connect a separate grounding wire to the external grounding point using the M6x16 combination bolt. It can bond the inverter to the local ground connection for personnel safety. By bonding at this location, it is easy for the operator to determine the inverter is safely grounded.

  • Page 39: Ac Wiring And Internal Grounding

    Electrical Connection 4.4.2 AC Wiring and internal grounding 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. If you choose internal AC grounding, a grounding wire should run with the AC power wires and connect to the internal ground bus (as shown in figure 4-7).
  • Page 40 Electrical Connection Inverter model Max AC OCPD CPS SCH350KTL-DO/US-800 350A Table 4-5 Specification of AC OCPD IMPORTANT! Overcurrent protection device for the AC output circuit is not included in this package. inverter’s nominal operating voltage 800VAC. another voltage/configuration is needed, a transformer may be necessary.
  • Page 41 The transformer VA rating should be at least 100% of the sum of the connected inverter VA ratings. CPS recommends the transformer VA rating be selected based on IEEE C57.159-2016 Guide on Transformers for application in Distributed Photovoltaic (DPV) Power Generation Systems. It is the responsibility of the system designer to determine and take into account the reliability of the transformer and other system parameters.

  • Page 42: Dc Wiring

    Electrical Connection 4.4.3 DC Wiring 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 43 Electrical Connection Connect the DC cables to the DC terminals of inverter as shown in Figure 4- 12, and then tighten the screws. Figure 4-12 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 15 MPPTs as evenly as possible (e.g.

  • Page 44: Communication Cable Connection

    Electrical Connection Communication Cable Connection 4.5.1 RS485 and CAN Interfaces on communication board Figure 4-13 RS485 and CAN Interfaces on communication board 44 / 123...
  • Page 45 Electrical Connection Item names Picture Configuration OFF - Disable terminal S2 Selector switch resistor (set terminal resistor) ON - Enable terminal resistor RS485_A RS485_B RS485 port RS485_GND 6-pin connector plug RS485_A RS485_B RS485_GND CAN port L- CAN_L (2-pin connector) - CAN_H OFF - Disable terminal resistor Upper S150 Selector...

  • Page 46: Communication Connection

    4.5.2 Communication Connection The inverter supports industry standard Modbus RS485, Ethernet, CAN and AC-PLC communication modes. AC-PLC communication requires connection of the CPS AC- PLC Kit accessory. RS485 and CAN Communication Schematic Diagram Connect RS485 communication cables with the help of 6-pin terminal to 485 communication module, referring to figure 4-14 for a single inverter RS485 communication connection and figure 4-15 for network configuration.
  • Page 47 Electrical Connection Connect CAN communication cables with the help of 2-pin terminal to CAN communication module, referring to figure 4-14 for a single inverter CAN communication connection and figure 4-15 for network configuration. Figure 4-15 RS485/CAN communication cable connection for network configuration It is recommended that industrial grade shielded twisted pair RS485 cable be used in lieu of unshielded twisted pair.
  • Page 48 Electrical Connection When the inverters are monitored via the RS485/CAN communication, a unique RS485/CAN 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/CAN communication network.
  • Page 49 Electrical Connection DANGER! • Make sure all DC and AC power has been disconnected before opening the wire box and ensure that hazardous high voltage and power has been discharged to avoid risk of electric shock. • Wait at least 5 minutes after disconnecting from the DC and AC sources before servicing or maintaining the inverter.
  • Page 50 Electrical Connection After completing all the wiring steps, reinstall the front cover and side cover. Tools required: 5mm socket wrench, torque: 3N.m, 26in-lbs. IMPORTANT! • It is important to use hand tools (e.g. socket wrench) instead of power drivers or other types of screw drivers. •...

  • Page 51: Install The Linkit Module

    Electrical Connection Install the LINKIT Module IMPORTANT! • The LINKIT module is required for the commissioning of the inverter. This step does not need to be completed until commissioning. Remove the two M4x10 fixing screws on the DB9 connector cover by No.2 Philips head screwdriver and then rotate the cover to expose the LINKIT interface, as shown in Figure 4-17.

  • Page 52: Cable Connection Notices For Joints And Seals

    Electrical Connection 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. Figure 4-19 Cable must be vertical ⚫...
  • Page 53 Electrical Connection 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 4-21 Apply watertight sealants ⚫ Before and after tightening the fastening head, check carefully to ensure the watertight gasket is in good condition, i.e.

  • Page 54: Commissioning

    Commissioning Commissioning WARNING! Please follow the guidelines below before performing any on-grid operation to eliminate possible danger. Before powering up the PV system it is important to check the installation for any hazards that may be present. Pre-commissioning Checks 5.1.1 Mechanical Installation ⚫...

  • Page 55: 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 56: App Interface And Setting

    Access Point from the user communication devices (tablet, smartphone, etc.). 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. Figure 6-1 APP setting (step 1 and 2) Touch "Smart Link"...
  • Page 57 Troubleshooting Figure 6-2 Connect to the adapter (step 3 and 4) Touch the wireless network named CPLK-XXXXXXX (X can be found on the LINKIT label) shown in the Bluetooth List, or touch the green QR icon under the list to scan LINKIT car code to connect network; Or you can choose the WiFi Mode tab in the top right corner to set WiFi and input the password “Password”...
  • Page 58 Troubleshooting Figure 6-3 Inverter parameters (step 5 and 6) Set correct inverter parameters, such as Grid Connection Rule, RS485, Time Set, then click “<” icon to go to home interface. ⚫ Grid Connection Rule: Choose the Grid Code according to the requirements of your local authority.
  • Page 59 Troubleshooting  Placing the inverter into operation before the overall system complies with the national rules and safety regulations of the application is not permitted. 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.
  • Page 60 Troubleshooting Touch the top-right icon to check the detailed current and history information here. Troubleshoot related problems and restart. Contact CPS Customer Service if necessary. Touch “More” icon and input password "1111" to power on/off device. Figure 6-5 More interface...

  • Page 61: Structure Tree Of App Interface

    Troubleshooting Structure Tree of App Interface Open Bluetooth Choose APP function Setup the product Activate a site Manage my site Choose SN Main menu Chart Setting Event More Turn ON/OFF Running Data Running Status Warning Password: 1111 Inverter Parameters Read/Write Register Upgrade Firmware Grid Code Time set...

  • Page 62: Main Menu

    Troubleshooting Main Menu In the Main interface, you can access the DC, AC, OTHER and VERSION information. Figure 6-7 Main information on Main Interface In addition, you can see four submenus: Chart, Setting, Event and More. 62 / 123...

  • Page 63: Chart

    Troubleshooting 6.4.1 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 6-8. Figure 6-8 power generation screen 63 / 123...

  • Page 64: Setting

    Troubleshooting 6.4.2 Setting Touch the Setting icon and input the password “1111”, you will go to the setting interface. Figure 6-9 Setting interface It’s possible to access three submenus on the setting interface: Inverter Parameters, Read/Write Register and Upgrade Firmware. 64 / 123...
  • Page 65 Troubleshooting Inverter Parameters Touch the Inverter Parameters tab, you can set the following parameters as required. Figure 6-10 Inverter Parameters IMPORTANT! Check with your local electric supply company before selecting a grid code. If the inverter operates with an incorrect grid code, the electric supply company may cancel the interconnection agreement.
  • Page 66 Troubleshooting Read/Write Register In the Read/Write Register interface, you can find the following sub-menus: Power dispatch, Grid Protection Parameters, Control Command, ActivePowerDerating, ReactivePowerDerating ， Other parameters, Enable/Disable Control Parameters, Inverter Basic Information and LcdLess Basic Parameters. Figure 6-11 Read/Write Register IMPORTANT! The following mobile screenshots show parameters in accordance with the IEEE 1547-2018 Grid Code.
  • Page 67 Troubleshooting Power Dispatch Touch the Power Dispatch, you can set the following parameters as required. Figure 6-12 Power dispatch interface Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE Grid Over Voltage Protection Device Power On Or Off Onoff On Or Off Command...
  • Page 68 Troubleshooting Grid Protection parameters 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. 68 / 123...
  • Page 69 Troubleshooting Figure 6-13 Protection Parameters In addition, the table listed below can provide detailed parameter information for you. Grid Grid Grid code code code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE Grid Over Voltage Protection Threshold Level 1 Max. grid GridVoltMax1 {100.00%,135.00%} 110.00%...
  • Page 70 Troubleshooting Threshold Level 3 Max. grid GridVoltMax3 {100.00%,135.00%} 120.00% 120.00% 120.00% voltage Trip Time Level 3 Max. grid trip VoltMaxTripT3 {0.00, 655.00} 0.16 0.16 0.16 Secs voltage Grid Under Voltage Protection Threshold Level 1 Min. grid GridVoltMin1 {0.00%,100.00} 88.00% 88.00% 88.00% voltage Trip Time Level 1 Min.
  • Page 71 Troubleshooting Threshold Level 3 Min. grid GridFrqMin3 {50, 60} 56.50 57.00 56.50 frequency Trip time of Level 3 Min. grid FrqMinTripT3 {0.00, 655.00} 0.08 0.32 0.32 Secs frequency Voltage and Frequency Protection Recovery Recovery Max threshold grid VoltMaxRecovery {100.00%, 135.00%} 105.00% 108.00% 108.00% voltage protection Recovery Min threshold.
  • Page 72 Troubleshooting 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 6-14 ActivePower Derating interface You can see the Curve of over voltage derating in figure 6-15 and Curve of over frequency derating in figure 6-16.
  • Page 73 Troubleshooting Figure 6-16 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 IEEE-1547 RULE-21 ISO-NE Over-Voltage Derate Grid Volt of VwCurve {100.00%, VwCurveV1 106.00%...
  • Page 74 Troubleshooting Recovery frequency of {40.000, 50.000} UnFreDeratRecov triggering 48.000 48.000 48.000 {50.000, 60.000} underfrequency derating NB32004 standard: UnFreDeratRate {0.0001, 1.5000} 0.0500 0.0500 0.0500 Underfrequency derating rate Over-Frequency Derate NB32004 standard: {60.000, 65.000} OvrFrqMin 62.000 60.03 60.49 The trigger frequency of {60.000, 65.000} overFrequency derating The rate of over...
  • Page 75 Troubleshooting ReactivePowerDerating The ReactivePowerDerating interface is used to set the Grid reactive power derating parameters, including PF parameters and Qu parameters, etc. Figure 6-17 The ReactivePowerDerating interface Note: The PF and Q value can be adjusted by remote software if the “Remote” is selected.
  • Page 76 Troubleshooting (PFCurveP1,PFCurvePF1) Inductive (P%) Capacitive (PFCurveP2,PFCurvePF2) Figure 6-18 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 6-19. Q(%) (QuCurveU2i,QuCurveQ2i) Inductive (QuCurveU1, QuCurveQ1) (QuCurveU1i, U(V) QuCurveQ1i) Capacitive (QuCurveU2,QuCurveQ2) Figure 6-19 Q(u) Curve Mode...
  • Page 77 Troubleshooting 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 {0.00,110.00} 50.00 50.00 50.00 PFpCurvePF1 PF of PF(P) point 1 {-1,-0.8},{0.8,1} 1.000 1.000 1.000 PFpCurveP2 Power of PF(P) point 2 {0.00,110%}...
  • Page 78 Troubleshooting Grid code Grid code Grid code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE Qp Dynamic Var Support Active power of Q(p) QpCurveP1 {0.00,100.00%} 20.00% 20.0% 20.0% point P1 Reactive power of {-60.00%, QpCurveQ1 0.00% 0.0% 0.0% Q(p) point Q1 60.00%} Active power of Q(p) QpCurveP2...
  • Page 79 Troubleshooting Other parameters 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. 79 / 123...
  • Page 80 Troubleshooting Figure 6-20 Others interface 80 / 123...
  • Page 81 Troubleshooting In addition, the table listed below can provide detailed parameter information for you. Grid Grid Grid code code code Parameter name Description Range Unit IEEE- RULE-21 ISO-NE 1547 PowerOnDelay Startup delay time {0,1200} Secs ErrSoftStartP Pwr Ramp after Fault {0.01%,100.00%} 0.16% 2.00%...
  • Page 82 Troubleshooting Grid Grid Grid code code code Parameter name Description Range Unit IEEE- RULE-21 ISO-NE 1547 Static Threshold GFCIStaticT {0,655.00} 0.20 0.20 0.20 Secs Leakage Time Threshold dynamic GFCIDynProFactor coefficient Leakage {0.0%,200.0%} 150% 100% 100% current DCIProtection1 Max. DCI value 1 {0.005,5.000} 1.155A 0.50%...
  • Page 83 Troubleshooting Grid Grid Grid code code code Parameter name Description Range Unit IEEE- RULE-21 ISO-NE 1547 OptiVoltMaxMpptxx Maximal voltage of Mppt {500, 1500} 1500 1450 1450 (xx=1..15) optimizer PhaseLoseCoeff PhaseLoseCoeff {0.5%,30%} 3.0% 3.0% 3.0% HVRT Reactive current HVRTReactiveI {0%,500.0%} 150.0% 150.0% 150.0% coefficient...
  • Page 84 Troubleshooting Grid Grid Grid code code code Parameter name Description Range Unit IEEE- RULE-21 ISO-NE 1547 Short-circuit differential ShortErr_Time1 {0.005, 0.010} 0.000 0.000 0.000 Secs voltage detection time ShortErr_SumCurr 0.00 0.00 0.00 ShortErr_MinVolt Short-circuit protection ShortErr_Time2 {0.005, 5.000} 0.005 0.005 0.005 Secs time...
  • Page 85 Troubleshooting Enable/disable Control Parameters In the Enable/disable control parameters interface, you can access the following information: Figure 6-21 Enable/disable control parameters 85 / 123...
  • Page 86 Troubleshooting Grid Grid Grid code code code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE control parameter Article 1~5 Article 5 Article 4 Article 4 CtrParaGroup setting of inverter loop groups, groups groups groups {Disable, Disable Reactive power Q(U) Q(u) CtrModeReactivePw Remote,Q,PF,PF dispatch...
  • Page 87 Troubleshooting Grid Grid Grid code code code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE Enable Static GFCIStaticEn Threshold Leakage {Disable, Enable} Enable Enable Enable current Enable Dynamical GFCIDynProEn ground fault circuit {Disable, Enable} Disable Disable Disable interrupter Over frequency OverFrqDeratingMo derating {Disable, Enable}...
  • Page 88 Troubleshooting Grid Grid Grid code code code Parameter name Description Range Unit IEEE-1547 RULE-21 ISO-NE 2: LCD sends 1 numbers numbers numbers to 15 to the DSP settings settings settings respectively for MPPT group numbers settings GridFaultRestartEn Grid fault auto restart {Disable, Enable} Enable Enable...
  • Page 89 Troubleshooting Figure 6-22 Commands interface ⚫ Force Restart: If a fault shutdown happens, a severe fault may have occurred inside the inverter. The user can perform a force reboot for one time per Power On in this menu if the user needs to restart the inverter. ⚫...
  • Page 90 Troubleshooting according to the following conditions： ⚫ The total input power is lower than 90% of the active power. ⚫ Once this MPPT scan function is activated on the device, it will search the maximum power point at a voltage step of 5V in the MPPT range for full load, and retrieve the maximum power point.
  • Page 91 Troubleshooting Figure 6-23 PidSvgEnable interface IMPORTANT!  It is recommended that the start time is a little earlier than sunrise and the end time is a little later than sunset, so that the inverter can take full advantage of sunshine to output power. ...
  • Page 92 Troubleshooting item. Figure 6-24 SvgWorkModeEnable ⚫ SvgReactiveSetVal: When enabling SVG function, set the SVG reactive power value according to the detailed reactive power requirements of Grid Company. The inverter will output the preset reactive power during the preset time duration, to ensure the power factor of local grid can meet relevant dispatching requirements.
  • Page 93 Troubleshooting Inverter Basic Information In the inverter basic information interface, you can access the following information: Figure 6-25 Inverter basic information interface 93 / 123...
  • Page 94 Troubleshooting LcdLess Basic Parameters The LcdLess Basic Parameters interface is used to set the parameters as below. Figure 6-26 LcdLess Basic Parameters interface 94 / 123...
  • Page 95 Troubleshooting ⚫ Set the PidSvg start time and end time: set the PidSvg start time and end time on the following interface according to your local sunshine duration, to ensure the inverter can enable PID and/or SVG mode during preset time duration.

  • Page 96: Event

    Troubleshooting 6.4.3 Event Touch the Event icon, it will go to the Event interface. There are 2 submenus in the Event menu: “Current” and “History”. Figure 6-28 Event interface 96 / 123...

  • Page 97: More

    Troubleshooting 6.4.4 More Figure 6-29 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 98: 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 power work) POWER...

  • Page 99: Common Fault And Troubleshooting

    The issue can be identified and resolved based on the definitions, possible causes and recommended solutions listed in the following table. There are generally 3 types of faults: warning, protection and hardware fault, see the detailed information in table 7-3. Proper analysis is recommended before contacting CPS Customer Service. 99 / 123...
  • Page 100 Troubleshooting Types Fault Codes Solutions Definition: The voltage across the flying capacitor is too low. Possible causes: • The open circuit voltage of the PV panel configuration is inconsistent. CfLowErr Recommended solutions: • Check the input voltage deviation on the LCD, •...
  • Page 101 Troubleshooting Definition: Cooling fan failure by visual check Possible causes: • Fan is blocked; • Fan service life has expired; • Fan socket connector has poor contact. ExtFanErr Recommended solutions: • Observe for 5 minutes and see whether the alarm will be eliminated automatically; •...
  • Page 102 Troubleshooting Definition: Internal alarm Warn0030 Recommended solutions: (EepromErr) • Observe for 5 minutes and see whether the alarm will be eliminated automatically; • Contact after-sales service personnel. Recommended solutions: Warn0040 • (DC SPD fault) Contact after-sales service personnel. Recommended solutions: •...
  • Page 103 Troubleshooting • If after adjustment, alarm still occurs, replace inverter • Restart inverter by recycle both AC and DC switches. Protect0030 • Wait for 1 minute between OFF and ON for (Inverter over all energy to discharge. Current) • If inverter cannot clear fault, replace inverter.
  • Page 104 Troubleshooting • Observe for 30 minutes and see whether the alarm will be eliminated automatically; • Contact after-sales service personnel. • Protect0180 If the inverter can start up, then recalibrate. • (Sampling offset If the inverter always report this alarm and of DCI) cannot start up, then replace inverter.
  • Page 105 Troubleshooting • The parameter ISOResist in hidden menu can be adjusted a bit. • Check wires of PV and ground: • Turn OFF AC switch to disconnect inverter from Grid. • Open fuse drawers to de-couple PV strings from each other. Test strings with string test set.
  • Page 106 Troubleshooting • Restart inverter by recycle both AC and DC switches. Protect0100 • Wait for 1 minute between OFF and ON for (Sensor fault of all energy to discharge. leakage current) • If inverter cannot clear fault, replace sensor or inverter. •...
  • Page 107 Troubleshooting • Measure voltage at DC terminals in wiring compare with reading Measurement menu. PV voltage must be less than 1500Vdc in open circuit condition. • PVVoltOver If display reading is not within 2% of meter reading, replace inverter. • If display reading is within 2% of meter reading, adjust number of panels in the string.
  • Page 108 Troubleshooting • Restart inverter by recycle both AC and DC switches. Fault0100 • Wait for 1 minute between OFF and ON for all energy to discharge. (Grid relay fault) • If inverter cannot clear fault, replace inverter. • Check wire insulation of PV and ground circuits.
  • Page 109 Troubleshooting • Restart inverter by power cycling both AC and DC switches. Fault0020 • Wait for 1 minute between OFF and ON for (Bus over volt all energy to discharge. Hardware) • If inverter cannot clear fault, replace inverter. • Restart inverter by power cycling both AC and DC switches.

  • Page 110: 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 111: Replace The Cooling Fans

    Maintenance Replace the Cooling Fans If the internal temperature of the inverter is too high or abnormal noise is heard assuming the air vent is not blocked and is clean, it may be necessary to replace the external fans. IMPORTANT! Disconnect the AC &...
  • Page 112 Maintenance 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.(Figure 8-3) Figure 8-3 Replace cooling fans 112 / 123...

  • Page 113: Replace The Inverter

    Maintenance 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 114: Technical Data

    Technical Data Technical Data Datasheet Model No. SCH350KTL-DO/US-800 DC Input Nominal input power 360 kW Max input voltage 1500Vdc Input operating voltage 500-1450Vdc range MPPT input operating 880-1300Vdc voltage range MPPT voltage range @ 500-1450Vdc PF>0.99 Turn on voltage/Power 550V/500W...
  • Page 115 Technical Data Output voltage range 704-880Vac Grid connection form 3Φ (Three phase)/ PE Maximum AC output current 253A @800Vac Nominal power frequency 60Hz Output frequency range 57- 63Hz Power factor >0.99 (±0.8 adjustable) Current harmonic distortion <3% AC disconnect type Max.
  • Page 116 Technical Data (derating from +113°F / +45°C) Operating humidity 0-100%, No condensation Operating altitude 4000m (0-2500m, No derating) Display and communication Display LED indicators, WiFi + APP Communication Modbus RS485/Ethernet TCP/IP/PLC Structural parameters Dimensions (WxHxD) (mm) 1057x810x400 Weight (kg) 143 kg Safety UL1741SB;...
  • Page 117 Technical Data 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%. When the grid voltage is lower than 100%, the inverter will limit the AC Output Current and the output power will begin to derate, as shown in Figure 9-2.
  • Page 118 Technical Data When the ambient temperature is higher than 45°C, the inverter output power will begin to derate, as shown in Figure 9-3. P0/Pn 100% Tamb Figure 9-3 Derating curve with high temperature The highest no-derating working altitude is 4000m for this inverter, its derating situation is as shown in Figure 9-4.

  • Page 119: P-Q Capabilities At Nominal Output Voltage

    Technical Data P-Q Capabilities at Nominal Output Voltage Inverter is capable providing reactive power of ±210kVAR 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 SCH350KTL PF=（-0.8）...

  • Page 120: 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 121: Limited Warranty

    The warranty policy for this product is specified in the contract; otherwise, the standard warranty is five (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. 121 / 123...

  • Page 122: Recycling

    The product cannot be disposed of as household waste. When the product has reached the end of its service life, dispose of it in accordance with the local applicable electrical waste regulations and standards. For more information, contact CPS Customer Service.
  • Page 123 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 -866300 Fax: +86 -21 -3779 1222 -866001 123 / 123...

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