CPS Series Photovoltaic Grid Connection Inverter
Contents
1. Chapter 2 Overview 2 1 Inverter for grid tied PV systems CPS SC20KTL DO US 480 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 The inverter converts the DC from PV modules to AC with the same frequency and phase as the AC grid All or part of the AC power is supplied to local loads and the surplus power is supplied to the electricity grid DC power AC power Bidirectional distituion A distribution electric meter AC Grid equipments equipments Figure 2 1 Grid tied PV system 2 2 Product type description CPS SC20KTL DO US 480 is a two MPPT PV inverter integrated with the DC and AC switches for indoor and outdoor application The suffix US means that this model of inverter passes the UL certification and is specialized for the American market 2 3 Product features CPS SC20KTL DO US 480 inverter incorporates the advanced 3 level and MOSFET paralleled with IGBT technology to minimize the energy loss The two MPPT design has the benefit of increasing the power generating 5 efficiency of the whole PV system The inverter has 2 MPPTs so a separate array can be controlled by an independent Maximum Power Point Tracking MPPT control circuit This means tha2. D E Ge Be Clg HN J ER OJ 9 Lu E L Figure 3 1 Dimensions of CPS SC20KTL DO US 480 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 b If the inverter cannot be mounted vertically it is allowed to be tilted backward by Max 15 c Do NOT mount the inverter forwards d Do NOT mount the inverter in a horizontal position e Do NOT mount the inverter upside down Figure 3 2 Mounting the inverter properly 3 Space required for inverter mounting on the wall as shown in Figure 3 3 The distances between the inverter and the surrounding objects should meet the following conditions two sides from the walls 211 81 inches top distance 211 81 inches bottom distance 223 62 inches the minimum spacing between two adjacently mounted inverters 223 62 inches gt 300MM Min 11 81in lt gt 300MM j gt 600MM 23 62in 11 81in e ay L gt 600MM 23 62in Figure 3 3 Inverter mounting dimensions 3 Secure the bracket with bolts
3. 59 30 GridVmaxTripT S GridVminTripT S gt GridFTripT S 1 80 1 80 0 08 Pls Input Pwd 1 SysPara ane 2 Restart Are You Sure 3 Recover 4 ClrErrRecd Restarting ge Ze PwdError Initialization Pls Input Again Success Recovering FaultOperated Failure Success Clear Errors p FaultOperated Failure Success Figure 4 14 System parameter setup 42 Chapter 5 Operation 5 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 and press ENT to start the inverter Then the inverter will start up and operate normally if the start up condition is met Otherwise the inverter will go to stand by mode Automatic start up The inverter will start up automatically when the output voltage and power of PV arrays meet the set value AC power grid is normal and the ambient temperature is within allowable operating range 5 2 Shut down Manual shutdown Normally manual shutdown is not required It can be shut down manually if repair or maintenance is required Move the cursor from the main operation interface to 4 Setting Press ENT and go to submenu 1 ON OFF Move the cursor to OFF and press ENT and then the inverter will be shut down Automatic shutdown The inverter will sh
4. 100 0 Reactive power 0 900 1 000 PowerFactor compensation 0 900 D 2 3 4 5 T 10 INSTRUCTION The function of active power derating and reactive power compensation is optional For detailed information you may call our after sales service center 40 2 2 Restart menu If an internal fault shutdown happens a severe fault has occurred inside the inverter The user may perform a force restart once in this menu if the user needs to restart the inverter INSTRUCTION The Restart function is effective only when the fault IntFaultA O in the troubleshooting table occurs The inverter may restore to normal operation automatically if alarm or protection faults occur This function will not respond when the inverter is in operation mode and a FaultOperated alarm interface will be indicated 3 3 Recover menu the manufacturer s parameter default value can be restored when the inverter is not in operation mode Otherwise a FaultOperated will be prompted 4 In 4 ClrErrRecd menu history information of the faults can be cleared A confirmation is required to clear the records 41 GridV Max V GridV Min V GridF Min Hz 528 gt 422
5. 2 Alarm If not existed No Alarm SPICommErr existed IntProtectA Figure 4 9 Alarm failure information 4 3 5 History Move the cursor to 3 History in the main interface Press ENT to check the history information as shown in Figure 4 10 There are 4 submenus in 3 History 1 ErrRecd 2 OP Recd 3 Version and 4 TotalTag 1 UP to 100 pieces of latest fault messages can be recorded and found in 1 ErrRecd menu 2 The latest 21 days operation history data is available to be found in 2 OP Recd menu All variable names in the data comply with the content in 1 OP Info menu of the main interface The users can select the 2 OP Recd menu and input the retraceable days For example the input number is 21 If the current date is December 15th the LCD will indicate the operation information of 21 days before that date which is November 24th 35 3 Software version hardware version and serial number of the product are listed in 3 Version menu 4 Cumulative generated power since the first day the inverter began working is available to be found in 4 TotalTag menu If not existed If existed 1 ErrRecd 8 2 OP Recd gt 3 History 3 Version 4 TotalTag No Alarm 1 t2010 12 15 20 50 SPICommErr 2 Ed2010 12 15 20 59 IntProtectl Pls Input Date 2 gt 12 15 RunT Mpac Yield 7
6. 13 Parameters of power dispatch Remote dispatch method The ActivePower and PowerFactor parameters can be adjusted through remote monitoring software For detailed information please refer to the manual of our monitoring system products 4 3 8 System protection parameters setup In Standby mode press PAGEDOWN and ENT at the same time in the main interface and enter the password PAGEUP gt PAGEDOWN gt RIGHT gt LEFT the system parameter setup menu is accessed This menu includes 4 submenus 1 SysPara 2 Restart 3 Recover and 4 ClrErrRecd as shown in Figure 4 14 1 Set up the system protection parameters in 1 SysPara menu The specification of protection parameters is shown in Table 4 3 39 Table 4 3 Protection Parameters Table Setup range lower N LCD indication Description limit default amp upper limit 1 GridV Max V Grid voltage upper limit 200 528 533V GridVmaxTripT S Trip time under Max Grid V 0 05 1 80 2 00S GridV Min V Grid voltage lower limit 0 422 480V 0 05 1 80 GridVminTripT S Trip time under Min Grid V 2 00S 50 00 60 50 GridF Max Hz Grid frequency upper limit 65 00Hz 45 00 59 30 GridF Min Hz Grid frequency lower limit 60 00HZz 0 05 0 08 GridFTripT S Trip time under Min Grid F 300 00S Insulation impedance lower 200 600 IsoResis KOhm limit 1200KQ 80 0 100 0 ActivePower Active power derating
7. SS RS485 1 RS485 2 Figure 3 21 Diagram of communication wiring 28 Chapter 4 User Interface 4 1 Description of LCD panel The CPS SC20KTL DO US 480 LCD panel mainly consists of LCD screen LED indicator lights buzzer and 6 keys as shown in Figure 4 1 0 20 20 0 Figure 4 1 LCD panel Interpretation for the indicator lights is shown in Table 4 1 and function of the keys is shown in Table 4 2 Table 4 1 LED Indication LED light Name Status Indication Light Energized control panel starts to Working on work POWER power Light light 4 Power supply not working o Grid tied Light In grid tied power generation state operation on RUN indication Ste Derated running status light up 0 5s as light light off 1 6s 29 Light In other operation status or power off supply not working Light Grid Grid is normal on status GRID Sage Flash Grid fault light up 0 5s light off 1 6s indication f Light light i Power supply not working o Light Indicates a Fault on Fault Slow Indicates Alarm light up 0 5s light off status flash 2s FAULT aoe indication Fast Protective action light up 0 5s light light flash off 0 5s Light off No fault or power supply not working Table 4 2 Definitions of th
8. This symbol marks the location of grounding terminal which must be securely connected to the earth through the PE protective earthing cable to ensure operational safety DANGER Please disconnect the inverter from AC grid and PV modules before opening the equipment When the PV array is exposed to light it supplies DC voltage to this equipment Make sure hazardous high voltage and energy inside the equipment has been discharged Do not operate or maintain the inverter until at least 10 minutes after disconnecting all sources from DC and AC sides WARNING All the installation and wiring connections should be performed only by qualified technical personnel Disconnect the inverter from PV modules and the Power Grid before maintaining and operating the equipment CAUTION Although designed to meet international safety standards the PV Inverter can become hot during operation Do not touch the heat sink or peripheral surfaces during or shortly after operation CAUTION CPS SC20KTL DO US 480 inverter is approx 132Ibs 63kg Please ensure the mounting is properly installed before hanging the the inverter on the bracket 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 INSTRUCTION Conduits shall be used as the cable protectors for cable connection
9. e EMI Filter DC DC LI L2 L3 Figure 2 2 Schematic diagram of CPS SC20KTL DO US 480 2 5 Appearance description Figure 2 3 Appearance sketch of CPS SC20KTL DO US 480 Description of main items of the inverter shown in Figure 2 3 1 LCD key buttons operate the functions and change settings of inverter 2 LCD display indicates data 3 LED indicator lights indicate the status of inverter 4 DC input knockouts 4 AC output amp ground knockout 1 and signal port 1 from left to right 5 DC switch control the DC power on and off 6 AC switch control the AC power on and off 7 Main housing 8 Wiring box H Chapter 3 Installation Below is the installation instruction of 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 1 CPS SC20KTL DO US 480 Grid tied PV inverter Grid tied PV inverter upon which Inverter is hung 2 Mounting bracket 1 and mounted onto a wall Installation and operation 3 User manual es 4 Warranty em card for maintenance and repair maintenance and repair contains all necessary 5 Accessory kit accessories The 5 Accessory kit contains items listed below Table 3 2 Accessories C oem J o O e M 8x25L expansion e for br
10. them with 4 M4 12 bolts on each side as shown in Figure 3 8 eg Rem Figure 3 8 Securing panels on both sides 17 3 3 Electrical installation INSTRUCTION Conduits shall be used as the cable protectors for cable connection The knockouts for cable entry of CPS SC20KTL DO US 480 are shown in Figure 3 9 DC input AC output and ground Signal port Figure 3 9 Knockouts for cable entry The 5 ports on the left are for DC input AC output and ground connections matching the 1 amp 11 2 inch diagram of conduits The last port on the right is for communication matching the 1 2 amp inch diagram of conduits 3 3 1 DC connection 1 To ensure the optimal performance of the inverter please read the following guidelines before DC connection a First make sure that the maximum open circuit voltage of the PV modules is lower than 600Vdc under any conditions b The inverter has 2 MPPTs Ensure that the Max DC input current of each MPPT does NOT exceed 35A c Confirm that the PV modules for each MPPT of the inverter are of the same types and specifications before connection The number 18 orientation and tilt of PV modules may differ for different application 2 Wire connection for DC input a Wire connection between PV modules and inverter Table 3 3 Common configurations DC inp
11. through the mounting holes and install the inverter a Mark the 6 bolt holes for mounting the bracket as shown in Figure 3 4 Min 16 54in 420mm Min Lime Sen 16 54in Min 5 91in 5 9 1in 13 29in 12 17in 420mm Min 300mm 16 54in Min 11 81in 309 0mm 337 5mm 420mm Min 750mm Min 29 53in Figure 3 4 Bracket mounting dimensions b Drill holes at the marked positions with a diameter of 0 4 inch drill and put the 6 M8 25 expansion bolts into the holes c Take the mounting bracket out of the package and secure the bracket on the wall with the 6 nuts in pair as shown in Figure 3 5 13 Figure 3 5 Positions of bolt holes on the bracket d Screw off the bolts and remove the two panels on both sides of the inverter as shown in Figure 3 6 d WI Figure 3 6 Removal of panels before mounting inverter e Two people grab at the position on each side lift up the inverter and then hang it on the bracket Figure 3 7a e Make sure the inverter is securely mounted on the bracket 14 H Hand Grab Figure 3 7a Mounting inverter on the bracket Figure 3 7b Mounting inverter on the bracket Figure 3 7c Mounting inverter on the bracket Figure 3 7d Mounting inverter on the bracket Figure 3 7e Mounting inverter on the bracket f Put the two removed panels back and secure
12. 0 h 20 0KW 123 5KWh Mach Ver 1 00 Serial No 10141106001 T Yield KWh 152123 5 Figure 4 10 History menu and submenu 4 3 6 System setup Move the cursor to 4 Setting in the main interface Press ENT to set the current system parameters as shown in Figure 4 11 There are 5 submenus in 4 Setting 1 ON OFF 2 Language 3 Buzzer 4 SysTime and S Commun 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 36 the bottom of LCD screen move the cursor to OFF and press ENT then OFF State will be indicated as well The inverter will stand by instead of working normally if the startup conditions are not satisfied even ON is selected The inverter will be shut down immediately if OFF is selected in any cases 2 Two languages i e English and Chinese are available in 2 Language menu 3 Key beep and Alarm beep can be set mute unmute in 3 Buzzer menu Key beep and Alarm beep can be chosen by pressing PAGEUP and PAGEDOWN Shift between Enable and Disable by pressing PAGEUP and PAGEDOWN if the cursor is on the Key beep Complete the setup by pressing ENT Similarly the Alarm beep can be set up in the same way 4 Set up the system date and time with 4 SysTime menu These paramet
13. 4 Chapter 1 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS Please read this user manual carefully before product installation CPS reserves the right to refuse warranty claims for equipment damage if the user fails to install the equipment according to the instructions in this manual Warnings and symbols in this document DANGER DANGER indicates a hazardous situation which if not avoided will result in death or serious injury WARNING WARNING indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE NOTICE indicates a hazardous situation which if not avoided could result in equipment working abnormally or property loss OP Fr Pe INSTRUCTION INSTRUCTION indicates important supplementary information or provides skills or tips that can be used to help you solve a problem or save you time Markings on the product A HIGH VOLTAGE The product works with high voltages All work on the product must only be performed as described in this document A 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 EARTH GROUND
14. Bcps CPS SC Series Grid tied PV Inverter CPS SC20KTL DO US 480 Installation and Operation Manual Ver 1 2 Table of Contents Beforter ege dee deeg 1 Chapter 1 IMPORTANT SAFETY INSTRUCTIONG ccssecsseceseeeeeees 2 Chapter 2 e E 5 2 1 Inverter for grid tied PV systems AN 5 2 2 Product type description 5 2 3 Product f tures ccescececeseeceeeeeeceeeeeseeenensaeeeneeeeeeeeeseeeneneneneneses 5 2 4 Circuit structure design 6 2 5 Appearance description 7 Chapter 3 Installation c cc ccccccccssecesseccsectsccccesectececeessececouessoceescendeatuccacess 8 3 1 Basic reouirememts AN 9 3 2 Mechanical installation AN 10 3 3 Electrical installation AN 18 3 3 1 DCO COMMECTION 0 00 eeececeeeeeteeeeneeteeeeteseeeeeeeteseeeeaeeteaeeeteeteaes 18 3 3 2 AC and ground CONNECTION c ceeeeeeeeeeeeeeeeeeeeeeeeeteneeeeeeeeeaes 23 3 3 3 Communication CONNECTION eeeeeeeeeeeeeeeteeeteeeeeteeeteeeeeaes 26 Chapter 4 User Interface ccccscceseessseessseeeeseeesseesseeeseeeeenseessseesseneeeeeees 29 4 1 Description of LCD panel 00 0 ecceeeeeeeeeeeeeeseneeeeeeeteneeseneeteeeeeeete 29 4 2 Operation StalOso ienirst Eegeregie degt df 31 4 3 Interface and menu FUNCTIONS 000 eee ee enneeeeeeeneeetenaeeeereneeeeeees 31 4 3 1 Interface types 4 3 2 Menu functions 4 3 3 Operation Information 34 EE 35 43 5 ISON EE EE 35 KREE DEE 36 4 3 7 Power Dispatels asicsici nied tine Gaenet
15. Figure 4 2 31 CHNT POWER 7 Figure 4 2 LOGO interface 2 Indication of inverter operation mode Sys Checking gt gt gt gt gt gt Figure 4 3 Inverter system check ongoing Standby gt gt gt gt gt gt Figure 4 4 Inverter system in standby mode PV1 480 PV2 480 VAC VAC 540 v 20 0 KW 540 v 20 0 eum 18 5 A 80 2 CH 18 54 80 2 G i 08 12 13 10 05 08 12 13 10 10 a b Figure 4 5 Default display interface for normal operation 32 SPICommeErr Figure 4 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 4 3 stand by mode as shown in Figure 4 4 normal operation mode as shown in Figure 4 5 the switching time between a and b is 5 seconds and fault mode as shown in Figure 4 6 The default indication interface mainly indicates PV voltage PV current grid voltage instant power daily generated power and time information under normal operation The fault information of the most recent current fault will be indicated on the LCD screen when the inverter is in fault mode 4 3 2 Menu functions LCD screen displays default indication interface when the inverter is in operation mode Press ESC in this interface to escape the default interface and enter the main operati
16. Turn off 3 phase working power supply and then reboot the system 3 Contact our after sales service center 3 IntFanErr 4 ExtFanErr 5 EepromErr Definition Fan invisible from outside inside inverter is working abnormally Possible causes 1 Fan service life has expired 2 Fan socket connecter has poor contact Recommended solutions 1 Observe for 5 minutes and see whether the alarm will be eliminated automatically 2 Switch off 3 phase work power supply and then reboot the system 3 Contact after sales service personnel Definition The visible fan from outside view is working abnormally Possible causes 1 Fan is blocked 2 Fan service life has expired 3 Fan socket connecter has poor contact Recommended solutions 1 Observe for 5 minutes and see whether the alarm will be eliminated automatically 2 Check for foreign matters on fan blades 3 Switch off 3 phase work power supply and then reboot the system 4 Contact after sales service personnel Definition Internal alarm 48 Possible causes Internal memory has a certain problem Recommended solutions 1 Observe for 5 minutes and see whether the alarm will be eliminated automatically 2 Contact after sales service personnel Definition Ambient temperature or temperature inside inverter is too high Possible causes 1 Ambient temperature outside the inverter is too high 2 Fan is blocked 3 Cooling is
17. acket installation 2 pairs bolts amp nuts pairs for backup use for grounding wire 1 nut for M5 nut backup use Ring terminal for grounding wire Cord end terminals 16 for input wires 3 for output wires 1 for neutral wire optional RJ45 connecters for communication cables for inverter with 1 MPPT Red wire 1 working alone 3 1 Basic requirements v Check that the product environmental specifications protection degree operating temperature range humidity and altitude etc meet the requirements of the specific project location v Make sure that the power grid voltage is within normal range v Ensure that the local electricity supply authority has granted permission to connect to the grid v Installation personnel must be qualified electricians or people who have received professional training v Sufficient space is provided to allow the inverter cooling system to operate normally v Install the inverter away from flammable and explosive substances v Avoid installing the inverter in locations that exceed the temperature limits specified in the inverter data sheet to limit undesirable power loss v Do not install the inverter near the electromagnetic source which can compromise the normal operation of electronic equipment 3 2 Mechanical installation 1 Dimensions 543 5 2mm EEN 21 39in 8 46in 8
18. affected because of incorrect installation Recommended solutions 1 TempOver 1 Confirm that external ambient temperature is Protect f within the specified range of operating temperature 2 Check whether radiation air inlet is blocked 3 Whether radiation fan is blocked 4 Check whether the location of installation is appropriate or not 5 Observe for 30 minutes and see whether the alarm will be eliminated automatically 6 Contact after sales service personnel Definition 2 GridV OutLim Grid voltage exceeds the specified range 49 3 GridF OutLim Possible causes 1 Grid voltage is abnormal Power grid breaks down 2 Cable connection between the inverter and the grid is poor Recommended solutions 1 Observe for 10 minutes and see whether the alarm will be eliminated automatically 2 Check whether the grid voltage is within the specified range 3 Check whether the cable between the inverter and power grid is disconnected or has abnormalities 4 Contact after sales service personnel Definition Grid voltage frequency is abnormal or power grid is not detected Possible causes 1 Grid frequency has abnormalities 2 Cable connection between the inverter and the grid is poor Recommended solutions 1 Observe for 10 minutes and see whether the alarm will be eliminated automatically 2 Check whether the grid frequency is within the specified range 3 Check whether the cable between t
19. de if malfunction occurs 44 Standby gt gt gt gt gt gt Figure 5 3 Inverter system in standby mode 4 Fault mode as shown in Figure 5 4 The inverter will disconnect from the power grid and turn into fault mode when the inverter or power grid fails Check the specific cause through Troubleshooting table Table 5 1 in terms of the fault message displayed on the LCD and eliminate the fault according to the instructions SPICommErr Figure 5 4 Fault indication interface WARNING All the installation and wiring connections should be performed only by qualified technical personnel Disconnect the inverter from PV modules and the Power Grid before maintaining and operating the equipment 5 4 Grid connection and power generation CPS SC20KTL DO US 480 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 45 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 In low light conditions when power generation is not enou
20. e keys Key Definition of function Escape Back end mute Confirm entering the menu confirm set point i Page down in selection menu 1 when setting parameters 30 Right 1 when setting parameters 4 2 Operation state Table 4 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 will light up when the inverter detects that the grid connection conditions meet the requirements and power is fed into the grid RUN will blink if the grid is in derated running state during the period of feeding power into the grid GRID will light up when the grid is normal during the operation of the inverter Otherwise GRID will blink until the grid restores to normal FAULT will blink quickly as a fault except grid abnormality occurs FAULT will not light out until the fault is eliminated The light will blink slowly when an alarm occurs FAULT keeps being lighted up when an internal fault occurs The buzzer will give alarms if a fault involving power grid abnormality occurs 4 3 Interface and menu functions Users can perform the corresponding operations with the 6 function keys according to the indications of the LCD display 4 3 1 Interface types 1 The LCD interface starts with the company logo once the system is energized as shown in
21. ers are of critical importance and will be used in history information Select year month day hour and minute by pressing Page Up Page Down and set up the specific date and time by pressing Left and Right 5 Set the 485 communication parameters with 5 Commun menu 37 gt ON OFF ON State He 1 ON OFF gt English 2 Language 4 Setting 3 Buzzer 4 SysTime English Ver 5 Commun KeyBeep Enable AlarmBeep Disabled l 2009 12 15 21 14 Address 2 BaudRate 3 1 2400 2 4800 3 9600 4 115200 Figure 4 11 System setup menu and submenu 4 3 7 Power Dispatch ActivePower and PowerFactor parameters can be set up through LCD operations as well as remote control by software Local dispatch order Service personnel can adjust the ActivePower and PowerFactor parameters through LCD operations For detailed setup steps please refer to 4 3 8 System protection parameters setup The current parameters of ActivePower and PowerFactor can be checked by the following steps Move the cursor to 5 Dispatch in the main interface as shown in Figure 38 1 OP Info 5 Dispatch 2 Alarm 3 History 4 Setting Figure 4 12 Contents indicated on the main operation interface Press ENT to the interface shown in Figure 4 13 ActivePower 100 0 PowerFactor 1 000 Figure 4
22. f AC output d Connect the L1 L2 L3 and Neutral red black blue grey AC output wires to the corresponding terminals on the PCB board 3 Wire connection for grounding a The Gnd wire Equipment grounding conductor is recommended to be green or green with continuous yellow stripes per National Electrical Code Insert the cable through the steel conduit and strip the skin 0 4 inch off the cables as shown in Figure 3 16 Figure 3 16 Diagram for wire stripping of grounding conductor b Crimp the terminal with the ring terminal in the accessory kit as 24 Bcps shown in Figure 3 17 Figure 3 17 Diagram for terminal crimping of grounding conductor c Connect the Gnd wire with a M5 nut at the marked place on the lower right side of the Wiring box as shown in Figure 3 18 H Gow B 20 7 o o o 12 3 Figure 3 18 Diagram for wire connection of AC output and Grounding 25 3 3 3 Communication connection There are two RS485 signal ports on the inverter Shielded cables should be used for communication cables with the maximum length of 3280 feet 1 The communication of one single local
23. gh to keep the inverter in operation the inverter will enter standby mode When the voltage of PV array changes and becomes stable and higher than the required set value the inverter will attempt to start grid tied power generation again 5 5 Fault shutdown The inverter will be shut down automatically when the PV power generation system fails such as output short circuit grid overvoltage undervoltage grid overfrequency underfrequency high ambient temperature or internal malfunction of the machine The causes of fault can be identified based on the faults listed in Table 5 1 Proper treatment is recommended before contacting after sales service There are mainly 3 types of faults alarm protection and hardware fault 46 Table 5 1 Troubleshooting Table 1 TempSensorErr 2 SPlICommErr Definition Prompt detection of abnormal temperature Possible causes 1 Temperature Sensor socket connecter has poor contact 2 Temperature Sensor is damaged Recommended solutions 1 Observe temperature display 2 Switch off 3 phase working power supply and then reboot the system 3 Contact after sales service personnel Definition Communication inside inverter fails Possible causes 1 Communication circuits inside inverter are loose 2 LCD software problem 3 Inverter software problem Recommended solutions 1 Observe for 5 minutes and see whether the alarm will be eliminated automatically 2
24. hanes 38 4 3 8 System protection parameters setup ss sssssessserrrerreseene 39 Chapter P Operation cicccscacccccccscccecaceesscassncessntedsoncessucecensssacesctenesecaszceess 43 5 1 Sfar HUD EE 43 52 SMU OWI ee erger nd Ss ee leaned Beas gears haved edna Pantene 43 5 3 Operation mode 43 5 4 Grid connection and power generation 45 5 5 Fault SHUtOWN c cc cccescbecegecti cee gettenescdanaes iaa 46 Chapter 6 Service and Maintemance cccseceseseseeeeeeeeseeeseeeeeseeeeeees 54 6 1 Disassembling of fan tray assembly A 54 6 2 Restoring of fan tray assembly A 56 Chapter 7 Technical Data ccccccseeeseeseeeeeseeeseeeeeseeseeeeeeseeseeeeenseeneeeees 60 Chapter 8 Limited Warranty cccseceseeseeeseseeeseeeeeseeeseeeeeseeseseeeeseeeseeees 62 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 If you encounter any problems during installation or operation of this unit first check this manual before contacting your local dealer or supplier Instructions inside this manual will help you solve most installation and operation difficulties Please keep this manual on hand for quick reference
25. he inverter and power grid is disconnected or has 50 abnormalities 4 Contact after sales service personnel Definition PV voltage exceeds the specified value Possible causes PV over voltage Recommended solutions 4 PV1 2 1 Observe for 30 minutes and see whether the VoltOver alarm will be eliminated automatically 2 Check whether PV voltage exceeds the specified range 3 Turn off the PV input switch wait for 5 minutes and then turn on the switch again 4 Contact after sales service personnel Definition PV module is connected inversely Possible causes PV positive pole and negative pole are connected 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 6 GFCI Err Possible causes 1 Excessive parasitic capacitance on PV module due to environmental factor 2 Grounding is abnormal 3 Fault inside the inverter Recommended solutions 1 Observe for 10 minutes and see whether the alarm will be eliminated automatically 2 Detect whether the electrical connection is abnormal 3 Contact after sales service personnel Definition Insulation impedance of PV positive to ground or PV negative to ground exceeds the specified range Possible causes 7 lsolationErr Air humidity is high Recommended solutions 1 Observe for 10 minutes and see whether the alarm
26. ides 2 Disconnect the fan tray assembly from the inverter by unplugging the 54 Bops wire connectors as shown in Figure 6 2 Figure 6 2 Unplugging the wire connectors 3 Remove the 4PCS screws off the fan bracket as shown in Figure 6 3 and 6 4 Tool 0 12 inch Hexagon socket screw key Figure 6 4 Unscrew the fan bracket on the right side 4 Pull out the fan tray assembly from the left side of inverter as shown in Figure 6 5 55 cps Figure 6 5 Pulling out the fan tray assembly 5 Use a dry cloth to clean the fan tray assembly to prevent dirt accumulating on it Do not use abrasive cleaning agents to avoid the damage of fans 6 2 Restoring of fan tray assembly 1 Insert the fan tray assembly from the left side of the inverter as shown in Figure 6 6 Figure 6 6 Inserting the fan tray assembly 2 Hook the fan tray assembly inside the Main housing at the right end as shown in Figure 6 7 Figure 6 7 Hooking the fan tray assembly 3 Make sure the wire connectors reveal from the right hole and the 56 bracket is well connected as shown in Figure 6 8 and 6 9 Figure 6 9 Fan tray assembly well connected 4 Connect the fan tray assembly with the inverter by plugging the wire connectors as shown in Figure 6 10 Figure 6 10 Plugging the wire connectors 5 Fix the left side of fan bracket on the Main housing with 2PCS screws 57 cps as shown in Figure 6 11 T
27. inverter is to connect the RS485 communication bus cable through the RS485 1 or RS485 2 port of the inverter directly Wiring requirement of RS485 1 2 is shown in Table 3 9 Table 3 9 RS485 1 2 wiring requirement mees com 2 The wires are labeled 1 8 from left to right as shown in Figure 3 19 Gin EIA TIA 568B Figure 3 19 Diagram of RS485 1 2 wiring 26 3 RS485 network connection When the inverters are monitored via the RS485 communication the unique RS485 address for each inverter can be set through the LCD interface Up to 31 inverters can be connected together in the RS485 communication network The Daisy chain topology is recommended for the RS485 network connection as shown in Figure 3 20 Other communication topologies such as the star networks are not recommended ZE fs fo E 1 2 N K Kg e SEW SE C Datalogger LJ TI Figure 3 20 R485 network connection 4 A terminal resistance of 120 ohms connected between Pin 1 and Pin 3 of RS485 1 2 of the first inverter in the multiple inverters string and data logger as shown in Figure 3 20 is recommended 5 The communication connection inside the Wiring box of the inverter is shown in Figure 3 21 27 SS RS485 IN
28. on interface The main operation interface is shown in Figure 4 7 1 OP Info 2 Alarm 3 History 4 Setting 5 Dispatch 33 Figure 4 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 PAGEUP and PAGEDOWN and then press ENT to confirm selection The users can return to the default indication interface by pressing ESC 4 3 3 Operation information When the cursor moves to 1 OP Info in the main interface you should press ENT to select the operation information as shown in Figure 4 8 Check the information by pressing PAGEUP and PAGEDOWN Return to the previous menu by pressing ESC Yield 23 5kWh MPac 20 0kW HES Pac 19 8kW RunT 12 1 h y Uab 480 0V Ubc 480 9V Uca 480 5V Freq 60 0Hz y la 24 1A lb 24 0A Ic 24 0A y T mod 78 2C T amb 50 C y Upv1 540 0V Ipv1 18 5A Upv2 500 0V Ipv2 20 2A 34 Figure 4 8 Operation information indication 4 3 4 Alarm As described before when faults occur during the normal operation of the inverter corresponding fault message will be indicated in 2 Alarm menu besides the sound and light alarms Move the cursor to 2 Alarm and press ENT to check out the specific fault information as shown in Figure 4 9
29. ool 0 12 inch Hexagon socket screw key Figure 6 11 Fixing the fan bracket on the left side 6 Fix the right side of fan bracket on the Main housing with 2PCS screws as shown in Figure 6 12 Tool 0 12 inch Hexagon socket screw key 7 Put the two removed panels back and secure the M4 screws on both sides with a torque value of 1 76N M 15 6Lb In as shown in Figure 6 13 Tool PH2 cross screwdriver 58 Ku Figure 6 13 Securing panels on both sides 59 Chapter 7 Technical Data Nominal DC Input Power Max DC Input Voltage Operating DC Input 260 580Vdc Voltage Range Start up DC Input Voltage 300V 200W Power Nominal DC Input Voltage 500Vdc 2 Number of MPP Trackers MPPT Voltage Range 300 550Vdc Max Input Current 35Ax2 Number of DC Inputs and 4 conductors with fuses per each of two MPPT Fuses inputs DC Disconnection Type Rated AC Output Power Max AC Output Power Rated Output Voltage Grid Connection Type Max AC Output Current Rated Output Frequency 1 Exceeding the rated voltage shown in Max DC Input Voltage may cause permanent damage to the equipment 60 Output Frequency Range AC Disconnection Type Stand by Night Environment S O Protection Degree NEMA 3R Cooling Variable speed cooling fans Operating Temperature 13 F to 140 F 25 C
30. shown in Figure 3 13 H aft Q apon Oe en d o BR ep S S RSR Bo D D CO OO OD n m C o IZ II DUU I e SR E II UN 0 ID DU UU a iz A oo II H 0 ID DU oo ld P Dr Pr E L pi DEE SE z SZ g WS E Figure 3 13 Wire connection in the Wiring box 1 MPPT working alone 3 3 2 AC and ground connection The following describes how to connect the AC output and grounding cables between the inverter and the public power grid 1 Use the recommended cables L1 Line 1 L2 Line 2 L3 Line 3 Neutral and Gnd Equipment grounding conductor 8 10AWG copper cored soft cables Table 3 8 Wiring requirement Tee 2 ole Wire 8 10AWG diameter 23 cps Torque 1 19N M 10 5Lb In value 2 Wire connection for AC output a Insert the cables through steel conduits and strip the skin 0 4 inch off Figure 3 14 Diagram for wire stripping of AC output c Crimp the terminal as shown in Figure 3 15 Figure 3 15 Diagram for terminal crimping o
31. t the two arrays can be installed in different positions and orientations The transformerless design of inverter with the benefit of small size light weight and high power density provides the best cost performance for the whole PV system The inverter is available for both indoor and outdoor applications due to its NEMA 3R IP65 protection class enclosure The integrated DC and AC switches make the maintenance more flexible and safer Besides the inverter has the function to support one or two independent MPPTs input to improve the system efficiency Meanwhile the inverter can automatically identify the connection way between PV modules due to its excellent self adaption ability 2 4 Circuit structure design The basic schematic diagram of CPS SC20KTL DO US 480 is shown in Figure 2 2 The input DC passes through surge protection circuitry DC EMI filter and the boost circuit to achieve maximum power tracking and boost up voltages The inverter converts the DC energy to 3 phase AC energy The high frequency components of AC voltage are removed with a line filter Then the 3 phase AC energy is sent through two stage relays and EMI filter to produce high quality AC power DC_Switch PVI ee PVI 7 oe EMI Filter DC DC d INV AC_Switch Filter NNN oo mmm EMI Uz Filter NM oe PV2 ke e PV2 e
32. to 60 C derating Range from 50 C 122 F Operating Humidity 0 95 non condensing ere SSS UL1741 2010 CSA C22 2 NO 107 1 01 FCC PART15 Grid Standard IEEE1547 2003 IEEE1547 1 2005 61 Safety and EMC Standard Chapter 8 Limited Warranty The warranty policy of this product is specified in the contract otherwise the warranty period is 5 years For service Chint Power Systems America will provide local support For Warranty terms please refer to the CPS America standard warranty policy in place at time of purchase 62 crs 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 2013 09 MKT PN 9 0020 0038G0
33. ut 2 MPPTs working independently 1 MPPT working alone 8 strings Inverter f Inverter 7 strings A Inverter 7 3 Inverter 6 strings S Inverter ri Inverter 19 4 stri ngs Inverter Inverter Table 3 4 Wiring requirement 14 10AWG 18 10AWG S Torque 1 19N M 10 5Lb In value H Note 1 The DC fuse protectors of different fusing capacity should be chosen according to the short circuit current of PV modules The 600VDC Littelfuse KLKD fuse series are recommended The detailed information is available for customers to find and download from http www littelfuse com The recommended fuse types are listed in the following table Table 3 5 Recommended fuse types DC input 2 strings MPPT 3 strings MPPT 4 strings MPPT Fuse KLKD 30 KLKD 15 KLKD 15 m Note 2 Concerning the current share of fuse for each DC input string 1 or 2 DC input strings are NOT recommended If it has to be we suggest that the DC input wire be connected to the inverter without DC fuses as follo
34. ut down automatically when the output voltage and power of PV modules are lower than the set point or AC power grid fails or the ambient temperature exceeds the normal range 5 3 Operation mode There are 4 operation modes The following are corresponding indications for each mode 1 System check mode for start up as shown in Figure 5 1 43 Sys Checking gt gt gt gt gt gt Figure 5 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 the inverter 2 Normal operation mode Default indication interface for normal operation of CPS SC20KTL DO US 480 is shown in Figure 5 2 a and 5 2 b The switching time between a and b is 5 seconds PV1 PV2 540 v 540 v 18 5 A 18 5 A 08 12 13 10 05 08 12 13 10 10 a b Figure 5 2 Default indication interface for normal operation In this mode the inverter converts the power generated by PV modules to AC continuously and feeds into the power grid 3 Standby mode as shown in Figure 5 3 The inverter will turn into standby mode when the output voltage and power of PV modules do not meet the startup conditions or PV voltage and input power are lower than the set point The inverter will check automatically whether it meets the startup conditions in this mode until it turns back to normal mode The inverter will switch from standby mode to fault mo
35. will be eliminated automatically 2 Check insulation of PV system 3 Contact after sales service personnel Definition Internal protection of the inverter Possible causes 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 52 Internal fault of the inverter Possible causes Fault occurs inside the inverter Recommended solutions 1 The inverter can be forced to restart once if it is required by operation and if it is confirmed that there is no other problem 2 Contact after sales service personnel 53 Chapter 6 Service and Maintenance The CPS SC20KTL DO US 480 inverter is usually maintenance free CAUTION Although designed to meet international safety standards the PV Inverter can become hot during operation Do not touch the heat sink or peripheral surfaces during or shortly after operation The following regular maintenance steps must nevertheless be carried out at regular intervals to ensure the inverters operation with optimal performance 6 1 Disassembling of fan tray assembly 1 Screw off the bolts and remove the two panels on both sides of the inverter as shown in Figure 6 1 Tool PH2 cross screwdriver f Fan tray assembly is inside the slot fy Eee Figure 6 1 Removal of panels on both s
36. ws 20 Table 3 6 Configurations for rare occasions DC 2 MPPTs working input independently 2 E F 8 Inverter f Inverter strings ESH E 1 MPPT working alone 1 string Inverter Table 3 7 Wiring requirement oOo o e Im OE Laus Laus vue vue ee Torque 1 19N M 10 5Lb In value Insert the cables through steel conduits and strip the skin 0 4 inch off the cables as shown in Figure 3 10 21 Figure 3 10 Wire stripping of DC input c Crimp the terminal as shown in Figure 3 11 Figure 3 11 Terminal crimping of DC input d The order of wire connection from left to right is PV1 PV1 PV2 PV2 Connect the PV1 and PV2 to the corresponding fuse socket of the negative pole and connect the PV1 and PV2 to the corresponding fuse socket of the positive pole with M5x12 bolts 4 PCS in total as shown in Figure 3 12 Figure 3 12 Wire connection of DC input e For the inverter with 1 MPPT working alone connect J1 IN1 with J3 22 IN2 wire socket in the Wiring box through the red wire in the accessory kit Connect J2 IN1 with J4 IN2 wire socket through the black wire in the accessory kit as
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