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Summary of Contents for KStar KSG-250UH-M0
- Page 1 KSG-250UH-M0/M2/M3 PV Grid-Connected Inverter User Manual Shenzhen Kstar New Energy Company Limited Add:Kstar Industrial Park, Guangming Hi-Tech Park, shenzhen ,P.R.CHINA Tel:0755-21389008 Fax:0755-21389008 202209 Ver:1.0 Web:www.kstar.com...
- Page 2 Software Licenses It is prohibited to use data contained in firmware or software developed by KSTAR, in part or in full, for commercial purposes by any means. It is prohibited to perform reverse engineering, cracking, or any other operations that compromise the original program design of the software developed by KSTAR.
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Page 3: About This Manual
It is probably that there are changes of manual in the subsequent inverter edition. The latest manual can be acquired via visiting the website at www.kstar.com. Symbols Important instructions contained in this manual should be followed during installation,operation and maintenance of the inverter. -
Page 4: Table Of Contents
Contents All Rights Reserved ..................I About This Manual ...................II 1 Safety ......................1 1.1 PV Panels....................1 1.2 Utility Grid....................1 1.3 Inverter....................2 1.4 Skills of Qualified Personnel..............3 2 Product Introduction...................4 2.1 Intended Usage..................4 2.2 Product Introduction................5 2.2.1 Model Description................5 2.2.2 Appearance..................6 2.2.3 Dimensions..................6 2.2.4 LED Board..................7 2.2.5 DC Switch..................7... - Page 5 7. Bluetooth APP Settings 4.4.1 Manual Transport ................19 ..............48 4.4.2 Hoisting Transport ................19 7.1 Overview ....................48 4.5 Dimensions of mounting-bracket ..............20 7.2 APP download ..................48 4.6 PV Bracket-Mounted Installation ...............21 7.3 Bluetooth connection ................48 4.6.1 Preparation before Mounting .............21 7.4 Basic information interface ..............50 4.6.2 Mounting Steps ................21 7.5 Query interface ..................51 4.7 Wall-Mounted Installation ................23...
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Page 6: Safety
The safety instructions in this manual cannot cover all the precautions that should be followed. Perform operations considering actual onsite conditions.KSTAR shall not be held liable for any damage caused by violation of the safety instructions in this manual. PV Panels PV strings will produce electrical power when exposed to sunlight and can cause a lethal voltage and an electric shock. -
Page 7: Inverter
User Manual User Manual All electrical connections must be in accordance with local and national Only qualified personnel can perform the country setting. standards. • Unauthorized alteration of the country setting may cause a breach of the type- Only with the permission of the utility grid, the inverter can be connected to certificate marking. -
Page 8: Product Introduction
Product Introduction TN-C TN-C-S TN-S Transformer Transformer Transformer 2. 1 Intended Usage KSG-250UH-M0/M3, a transformerless three-phase PV grid-connected inverter, is L1 L2 L3 L1 L2 L3 L1 L2 L3 an integral component in the PV power system. Inverter Inverter Inverter The inverter is designed to convert the direct current power generated from the PV modules into grid-compatible AC current and feeds the AC current to the utility grid. -
Page 9: Appearance
No signal Off Always on Bluetooth communication is connected. Blue Flicker Bluetooth communication is not connected. figure 2-2 Dimensions of the Inverter *The image shown here is for reference only. The actual product you receive may differ. 110kg KSG-250UH-M0/M2/M3 1055*700*336mm... -
Page 10: Dc Switch
The DC switch is used to disconnect the DC current safely whenever necessary. The inverter converts the DC current into grid-compatible AC current and feeds The KSG-250UH-M0/M2/M3 is equipped with four DC switches,each DC switch the AC current into the grid. -
Page 11: Unpacking And Storage
Do not dispose of the inverter together with household waste. • Check the delivery scope for completeness according to the packing list. Contact KSTAR or the supplier in case there is any damage or incompleteness. Refer to the corresponding instructions. -
Page 12: Scope Of Delivery
User Manual User Manual 3.3 Scope of Delivery Item Description Model Unit Qty. Check Remarks Inverter √ User manual √ Quick install manual √ Certificate of Approval √ • The packing case should be upright. • If the inverter has been stored more than half a year, the qualified personnel Warranty Card √... -
Page 13: Mechanical Mounting
User Manual User Manual • The ambient temperature and relative humidity must meet the following Mechanical Mounting requirements. . Safetyduring Mounting Max.RH:-100％ Min:-25℃ Max:+60℃ （non-condensing） Make sure there is no electrical connection before installation. • Prevent the inverter from direct exposure to sun, rain and snow. In order to avoid electric shock or other injury, be sure there is no electricity or plumbing installations before drilling holes. -
Page 14: Installation Clearance Requirements
User Manual User Manual 4.2.4 Installation Clearance Requirements • Reserve enough clearance around the inverter to ensure sufficient space for heat dissipation. (The fans are maintained on the left and right sides of the inverter, and a larger clearance is required.) ≥600mm ≥800mm ≥500mm... -
Page 15: Installation Tools
User Manual User Manual 4.3 Installation Tools Moving the Inverter Installation tools include but are not limited to the following recommended ones. If Move the inverter to the specified position before installation. The inverter can be necessary, use other auxiliary tools on site. moved manually or via a hoist. -
Page 16: Dimensions Of Mounting-Bracket
User Manual User Manual 4.6 PV Bracket-Mounted Installation 4.6.1 Preparation before Mounting Phillips screwdriver/ electric M4, M6 screw driver Marker Level Hammer drill Drill bit: φ12 Including 16mm socket Socket wrench wrench Opening: 16mm Remove the lifting rings and reassemble the sealing screws released in Step 1. Delivery scope M4×10 Grub screw... -
Page 17: Wall-Mounted Installation
User Manual User Manual Fix the inverter with two M6×35 screws. Secure the mounting-bracket with bolts. 1029mm 235mm 4.5N.m 4.7 Wall-Mounted Installation table 4-2 Fastening sequence 4.7.1 Preparation before Mounting Mounting-bracket Full threaded bolt M10* 5 Phillips screwdriver/ electric M4, M6 Metal bracket screw driver Flat washer... - Page 18 User Manual User Manual table 4-3 Fastening sequence Wall Fastening the bolt in the sequence of nut, spring washer, Expansion bolt slat washer Mounting- bracket Level the assembled mounting-bracket by using the level, and mark the positions Take out the inverter from the packing case. for drilling holes on the installation site.
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Page 19: Electrical Connection 26
User Manual User Manual Electrical Connection 5.1 Safety Instructions Prior to any electrical connections, keep in mind that the inverter has dual power supplies. It is mandatory for the qualified personnel to wear personal protective equipments (PPE) during the electrical work. Danger to life due to a high voltage inside the inverter! •... -
Page 20: Electrical Connection Overview
User Manual User Manual 5.3 Electrical Connection Overview table 5-2 PE wire requirements Electrical connection in the PV system includes additional grounding connection, AC connection, and PV string connection. The specifications are valid only when the phase wire and PE wire use the same material. -
Page 21: Opening The Wiring Compartment
User Manual User Manual Open the wiring compartment. Keep the wiring compartment opened during wiring through the limit lever 1:Heat shrink tubing 2：terminal (M6) attached to the cover. Remove the screw on the grounding terminal and fasten the cable with a screwdriver. 4~5N.m Apply paint to the grounding terminal to ensure corrosion resistance. -
Page 22: Ac Cable Connection
If multiple inverters are connected in parallel to the grid, ensure that the total transformer. number of parallel inverters does not exceed 28. Otherwise, please contact KSTAR • When the anti-PID function is enabled, observe the following items: for technical scheme. -
Page 23: Requirements For Ot/Dt Terminal
User Manual User Manual Ensure that the selected terminal can directly contact with the copper bar. If there are any problems, contact the manufacturer of terminal. Direct contact between the copper bar and the aluminium cable will cause electrochemical corrosion and impair the reliability of electrical connection. - Page 24 User Manual User Manual step 4 Strip the protection layer and insulation layer by specific length, as described in the Ensure that the depth L of the socket used is not less than 28mm. figure below. ≤220m step 5 Make the cable and crimp terminal. Gently pull the cable backwards to ensure firm connection, and fasten the swivel step 7 nut clockwise.
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Page 25: Connection Procedure
5.7.2 Connection Procedure As shown in the figure below, the inverter is provided with multiple PV inputs: PV KSTAR provides corresponding plug connectors in the scope of delivery for quick inputs 1~12; and each PV input is designed with an MPP tracker. -
Page 26: Installing The Pv Connectors
Check for polarity correctness. Arc or contactor over temperature may occur if the PV connectors are not firmly in place, and KSTAR shall not be held liable for any damage caused. The inverter will not function properly if any PV polarity is reversed. -
Page 27: Rs485 Communication
User Manual User Manual RS485 Communication Multi-inverter communication system In case of multiple inverters, all the inverters can be connected via RS485 cables in 5.8.1 Interface Description the daisy chain manner. The following figure shows the position of the communication wiring board in the inverter as well as the terminals equipped for the wiring board.herwise, skip performing this step. -
Page 28: Plc Communication Connection
PLC Communication Connection With a PLC communication module built inside, the inverter can communicate with the Photovoltaic communication box provided by KSTAR. For specific wiring method, refer to the photovoltaic communication box user manual. The photovoltaic communication box is an optional device that can be ordered from KSTAR. -
Page 29: Closing The Wiring Compartment
User Manual User Manual Strip a certain length of protective layer and insulating layer according to the 6. Commissioning requirements of the drawing. Inspection before Commissioning Check the following items before starting the inverter: • The inverter DC switch and external circuit breaker are disconnected. Crimp the OT / DT terminal. -
Page 30: Bluetooth App Settings
Overview the icons of query, settings and statistics on this page. The bluetooth function relies on the Kstar photovoltaic APP to send information to Bluetooth connection the Internet via bluetooth for data monitoring of KSG series inverters. Users can... -
Page 31: Basic Information Interface
User Manual User Manual Query interface Basic information interface ①. After it enters the bluetooth connection page, the interface will monitor the input After entering the bluetooth connection page, click the "query" icon, and the page information of each PV, and the real-time data will be continuously refreshed for the will display the inverter machine model and version information, as well as the input information of the device: running record and error event details (click "details"... -
Page 32: Set
User Manual User Manual Set page information: 7.6.1 Note: to enter the settings page, you need to enter the first-class password (default: 00000). Setting Setting rssi:-75 rssi:-75 Error details Setting rssi:-75 clear statistics Reactive power Settings clear statistics clear statistics Remote shutdown Input mode setting Input independent mode... -
Page 33: Related Parameters Setting Interface
User Manual User Manual 7.6.2 Related parameters setting interface: Set parameter information: 7.6.3 a. Input mode information: Input mode setting Grid standard setting Input mode setting Input mode Content Input independent mode China 3W+N+PE Input independent mode Input parallel mode Germany 3W+N+PE Remark: 100K allows for inputting independent mode only. - Page 34 User Manual User Manual c. Power factor setting: g. Threshold of over-frequency reduction: Value range Meaning explanation Value range Meaning explanation Reactive power is negative, and the power factor is 0.8-1 00800-01000 1.When the city power frequency reaches this 10800-11000 Reactive power is positive, and the power factor is 0.8-1 frequency threshold, the current power of the 0xFFFF...
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Page 35: Statistics Interface
User Manual User Manual l. Machine self-detection setting: Meaning CONSISTENT Disconnecting the Inverter GFCI For maintenance or other service work, the inverter must be switched off. RELAY Proceed as follows to disconnect the inverter from the AC and DC power sources. CURR INV Lethal voltages or damage to the inverter will follow if otherwise. -
Page 36: Dismantling The Inverter
User Manual User Manual Dismantling the Inverter Risk of burn injuries and electric shock! Error and alarm • Do not touch any inner live parts until at least 5 minutes after Error and alarm information of photovoltaic grid-connected inverter is shown in the disconnecting the inverter from the utility grid and the PV input. -
Page 37: Inverter System Error Type Analysis And Solution
User Manual User Manual Table 9.2 Alarm information Problem list and solution Alarm analysis Alarm information Alarm code Error message Solution Low speed of fan group 1 W00 -1 Machine alarm due to low speed of fan group 1. ①. Inspect whether the input mode is correct. Error of high Low speed of fan group 2 W01 -1... - Page 38 ②. If fault is not eliminated, contact the distributor. error (F22-1) For any maintenance need, please contact KSTAR. Otherwise, KSTAR shall not be held liable for any damage caused. Frequency ①. Disconnect the PV input, restart the machine, and see if consistency the machine can return to normal.
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Page 39: Maintenance Instruction
User Manual User Manual Check the temperature and dust • Stop the inverter and disconnect it from all power supplies before of the inverter. Clean the inverter Six months to a year maintenance. enclosure if necessary. System clean (- depend on the dust •... - Page 40 User Manual User Manual Pull out the fan module, clean the fans with soft brush or vacuum cleaner, and replace them when necessary. Parameters KSG-250UH-M0 KSG-250UH-M2 KSG-250UH-M3 Input(DC) Max. DC voltage 1500V MPPT voltage range 500-1500Vdc MPPT voltage range at full load...
- Page 41 Conditions DC switch • After replacement, unqualifified products shall be processed by KSTAR. Anti-islanding protection • The customer shall give KSTAR or his partner a reasonable period to repair the faulty device. Output over current Exclusion of Liability In the following circumstances, KSTAR has the right to refuse to honor the quality...
- Page 42 User Manual 18 overseas branch offices PV inverter industry Pre-sales：(86)0755-89741234 Ext 8151 PV inverter industry After-sales：(86)0755-89741234 Ext 8729 Global overseas service mailbox：overseas_service@kstar.com.cn...
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