DELTA ELECTRONICS, INC. Service engineers and end users may not divulge the information contained herein or use this manual for purpose other than those strictly connected with correct use of the product.
This user manual provides important instructions for DELTA grid-tie transformerless solar inverter. The product is designed, tested, verified, and certified according to international safety requirements, certifications, and standards but precautions must be observed when installing and operating the product.
Safety 1.2.2 Symbols This section describes the definition of the symbols in this manual. In order to prevent both personal injury and property damage, and to ensure long-term operation of the product, please read this section carefully and follow all the safety instructions while you use the product. DANGER! - This warning indicates an immediate hazard which will lead to death or serious injury.
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Safety INFORMATION - An exclamation mark enclosed in a double circle indicates additional important information is contained in the following section and the user should follow the instructions to prevent any hazards. DANGER : ELECTRICAL HAZARD!! - This warning indicates an immediate electrical hazard that unheeded can lead to death or serious injury.
The user manual is valid for the following device types: • M15A_220 • M20A_220 This user manual must be followed during installation, operation, and maintenance. DELTA reserves the right to make modifications to the content and technical data in this user manual without prior notice.
⑤ ⑥ ⑦ ⑧ Figure 2-1: Components Table 2-1: Packing list M15A_220 / M20A_220 Object Description Delta Solar Inverter 1 pc Solar inverter Wall mounting bracket 1 pc Mounting Bracket (Material: Aluminum/Thickness: 3mm) Important instructions for solar inverter. User Manual...
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Introduction ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ Figure 2-2: Overview Table 2-2: Overview description Component Component Component Toggle Latch DC Switch SUB_1G module port (option) Gland for AC output Wi-Fi Antenna port Gland for RS-485 DC input (H4) x 4 strings...
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Introduction Figure 2-3 below, shows the certification and rating label. Table 2-3 defines the symbol markings on this label. Figure 2-3: Rating label Table 2-3: Rating label explanation Symbol Definition Danger to life through electric shock Potentially fatal voltage is applied to the inverter during operation. This voltage persists even 60 seconds after disconnection of the power supply.
Installation 3 Installation CAUTION ! - High temperature may result in derated power output, the unit should not be installed in direct sunlight. - Risk of injury when lifting the inverter or if it is dropped. WARNING ! - Do not install the unit near or on flammable surfaces. - Please mount the unit tightly on a solid / smooth surface.
Installation 3.1 Unboxing & Review The unpacking procedure is shown as Figure 3-1. The position of hook attachment for crane transporting is shown as Figure 3-2. Figure 3-1: Steps to unpacke the inverter...
Installation 3.2 Vertical wall mount Refer to Figures 3-4 to Figure 3-7. 1. Ensure the surface to which the unit is to be mounted is sufficiently strong enough to carry the weight of inverter. 2. Orient the wall bracket (Figure 3-4) horizontally (perpendicular to the floor). 3.
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Installation Figure 3-4: Mounting bracket dimensions Positions for least amount of mounting bracket screws * Screw: M6 * Screw: M5 Figure 3-5 : Positions of mounting screws...
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Installation >200mm >200mm >300mm >300mm >300mm >500mm * >500mm * * Make sure it is high enough to have sufficient space for wiring. Figure 3-6: Separation distance of plural inverters Figure 3-7: Permitted and prohibited mounting positions...
Installation 3.3 Electrical Installation for AC Wiring DANGER : ELECTRICAL HAZARD!! - To avoid shock hazard during wiring, ensure any live grid connections are removed from the inverter. WARNING ! - Code compliance is the installer's responsibility. CAUTION : INVERTER AND EQUIPMENT DAMAGE MAY OCCUR ! - Installation for AC plug must meet the local electrical code.
Installation 3.3.1 AC Grid Types and Connections ATTENTION The default AC Grid connection is 3Ø-4W. It can also connect 3Ø-3W without Neutral (N). The inverter will operate from the following grid connections without need of an external transformer: TNC system TNC-S system 220/380V, 230/400V 220/380V, 230/400V...
Installation 3.3.3 AC Wiring Preparation The AC wires must be jacketed and meet the specifications in Table 3-2. If there is any conflict with local electrical code, please follow the electrical code. Table 3-2: AC wires requirement Size of each wire Cable diameter Recommended Torque 8~14 mm²...
Installation 3.3.4 AC Wiring 1. The packing has a AC Plug, please rotate it to release part A & B. (Figure 3-9) 2. Insert the cable into Part A (AC gland), and fix the internal wires (tighten by Φ2.5mm wrench with 1.8~2.5 N ・ m torque) into Part B . (Figure 3-11) 3.
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Installation Part B 8~14 mm² (8~6 AWG) Tightening torque: M6/ 1.8~2.5 N • m For 3P4W Power system : For 3P3W Power system : There are 5 wires that include There are 4 wires that include (L1、L2、L3、N) + PE (L1、L2、L3) + PE Figure 3-11 : AC wiring Figure 3-12 : Rotate the AC plug to fit...
Installation 3.4 Electrical Installation for DC Wiring DANGER : ELECTRICAL HAZARD!! - PV arrays convert sunlight into electric power with high DC voltage and high DC current which can cause dangerous electrical shock! - Use opaque material to cover the PV arrays before wiring or cabling. - Ensure the correct polarities are connected when DC cabling is applied.
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Installation Please read the following instructions for connecting DC connector : • Ensure the DC conductors used are Cu and sized to the correct ampacity per NEC or other local code • Strip off all wires for 6.5~7.5 mm. • The cross-sectional area for each DC conductor is 12~10 AWG (4~6 mm²). •...
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Installation Figure 3-14: Location of H4 connectors to connect array wiring (DC)
Installation 3.5 Equipment Grounding To ground the inverter, please crimp the grounding wire to ring terminal lug and fix it on the grounding point shown as Figure 3-15. * A- Screw: M6 / Torque: 3.9 N • m B- Screw: M5 Figure 3-15: Mount the equipment grounding...
Installation 3.6 Communication Module Connections The communication module of M15A_220 / M20A_220 is shown in Figure 3-16. It provides VCC(12V), RS-485, dry contact, EPO, and digital input terminals for various applications, and it can be extended to ability to use Sub_1G. V1 x1 &...
Installation 3.6.1 Accessing the Communication Module The communication module consists of an assembly with a PCB and a plastic carrier. It is located in slot through the bottom of the chassis. It can be accessed from the chassis bottom outside. The carrier is fixed to the chassis by two self-retaining screws.
Installation 3.6.2 RS-485 Connection The pin definition for the RS-485 terminal block is shown in Table 3-3. - Pins 1 and 2 provide a 12VDC bus for use with accessories. (If use of the 12VDC bus is necessary, please set switch 1 to the ON position.) - Pins 3 and 5 are both connected to the DATA+ input.
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Installation Terminal Resistor 120Ω(1/2W) DATA+ to DATA- RS485/USB RS485/RS232 Figure 3-18: Multiinverter connection illustration Table 3-4: Bus Termination switch settings Switch 1 Terminal Resistor ON Terminal Resistor OFF...
3.6.3 EPO Function & Digital Input The communication Module has an emergency power off function (EPO). Users can customize EPO function in APP or Delta Solar System (DSS). Figure 3-19: EPO and digital input function terminal block Once enabled, the EPO function can be used to turn off the inverter through the relayless contacts connected to terminals [V1 &...
Installation 3.6.4 Dry Contact Connection M15A_220 / M20A_220 provides 1 set of dry contacts, which can be used to control external devices according to the operating status of the inverter. The terminal block for this function is shown in Figure 3-20. The terminals marked in the figure identify the dry contact connection.
Installation 3.6.6 SUB_1G (optional) The SUB_1G module consists of an assembly with a PCB, a plastic case, a signal cable, and an antenna. It should be installed on the right side of the chassis. 1. Secure the plastic case on the chassis with 2 M4 screws by following torque. 2.
Installation 3.7 Wi-Fi The communication module supports the inverter to communicate with devices (such as smartphones, tablets, etc.) via Wi-Fi (base WPA2-PSK). User can restart the function through the APP or DSS. There is an antenna for Wi-Fi in the package (item 8,Table 2-1), which must be mounted on the plastic carrier as the procedure below.
Commissioning 4 Commissioning CAUTION : HOT SURFACES, DO NOT TOUCH! - Use care to avoid hot surfaces when operating the product! - Do not perform any task until the unit cools down or wear appropriate personal protective equipment. 4.1 LED Signals M15A_220 / M20A_220 with 3 LEDs can visually display the status of the inverter, as shown in Figure 4-1.
Commissioning 4.2 Auto ID Commission The Auto ID function can set all inverter IDs by DSS through (Delta Solar System) RS-485 or set by MyDeltaSolar APP through Wi-Fi, please refer to chapter 4.3 for operation manual. 4.2.1 Commission Setting (DSS) ①...
Commissioning 4.2.2 Scan inverter ① Click “Auto ID ”. ② Enter numbers of inverters. ③ Click “Scan Inverters”. ① ② ③ Figure 4-3: Steps of scanning inverters...
Commissioning 4.2.3 Set ID ① The serial number of the successfully scanned device will be displayed, the default ID can be changed. ② After ID setting is completed, click “Set ID”. ② ① Figure 4-4: Steps of ID setting...
Commissioning 4.2.4 Set Country ① Click to select the country of inverter. ② Click “Set Country”. ① ② Figure 4-5: Steps of country setting 4.2.5 Synchronize time Click “Sync Clock ” to Synchronize time. Figure 4-6: Steps of time synchronization...
Commissioning 4.3 Delta Function Setting Delta offers two setting tools: DSS (Delta Solar System Software) and APP (MyDeltaSolar) Function Active power control Q(U) control (volt-var control) P-F control (watt-frequecy control) Q by night(Q setting 24/7) P(U) control (volt-watt control) Anti-PID Fixed cosφ...
5 Maintenance Regular maintenance can ensure that the inverter maintains great performance. DELTA recommends that the unit should be inspected at least every 6 months. The maintenance frequency should be adjustable, depending on the sit environment, different seasons and weather effects.
Maintenance Figure 5-2: To secure door by hexagon driver 5.1.2 Close Door ATTENTION - Due to corrosion of live parts, excessive moisture or dust in the inverter may cause accidental damage. Ensuring that the inner of the inverter is clean free from unreasonable pollution is important for long service operating systems.
Maintenance 5.2 Replacement of Surge Protection Devices (SPD) Locations of Surge Protection Devices (SPD) for AC and DC wiring are shown below. The SPD should be replaced if damaged. AC SPD DC SPD Figure 5-3: Location of AC and DC SPD board AC SPD DC SPD Figure 5-4: AC and DC SPD module...
Maintenance 5.2.1 Replace AC SPD 1. Turn off the AC and DC power, and wait until the LED indicators turns off. 2. Follow Section 5.1.1 to open the door. 3. Loosen 3 screws, remove wires and disconnect signal cable to take off AC SPD. 4.
Maintenance 5.2.2 Replace DC SPD 1. Turn off the AC and DC power, and wait until the LED indicators turns off. 2. Follow Section 5.1.1 to open the door. 3. Loosen 3 screws, remove wires and disconnect signal cable to take off DC SPD. 4.
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Maintenance FRONT * Screw torque: 0.8 N•m BACK Figure 5-8: Remove wirings as connectors of DC SPD...
Maintenance 5.3 De-Commissioning If it is necessary to remove the inverter from active operation for maintenance or replacement, please follow the instructions below. DANGER : ELECTRICAL HAZARD!! To avoid serious injury, please follow the procedure below. CAUTION : HOT SURFACES, DO NOT TOUCH ! - Please be careful of hot surfaces if the inverter is just shutting down.
Error Message and Trouble Shooting 6 Error Message and Trouble Shooting While Delta Electronics endeavors to build electronic products with high reliability standards, there may still be situations where the inverter may not operate properly. In this case, please follow the instructions in the “Troubleshooting Guide”...
Error Message and Trouble Shooting 6.2 Fault Codes (Inverter Fault) Table 6-2A: Fault Codes (inverter fault) & Messages Message Description Action DC Injection Contact customer service for Utility waveform is abnormal technical support (F01,F02,F03,F04) Temperature The internal ambient temperature Check the installation ambient and High is over limit environment...
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Error Message and Trouble Shooting Table 6-2B: Fault Codes (inverter fault) & Messages Message Description Action DSP COMM Fault The internal communication Check the connection interface RS-485 (F23) connection is disconnected Ground Cur. 1. Check the insulation of Solar inputs Insulation problem of PV array High 2.
Error Message and Trouble Shooting Table 6-2C: Fault Codes (inverter fault) & Messages Message Description Action DC Current High DC current over range Restart inverter by DC switches (F60,F61,F70,F71) 1. Check the connection between external unit and COMM Ext COMM. Fault The external communication 2.
Technical Information 7 Technical Information Table 7-1A: Specifications Model M15A_220 M20A_220 DC Input Occasionally Max. Voltage 1100 V * Operating Voltage Range 200 - 1000 V MPP Voltage Range @ AC400V 380 - 900 V 480 - 900 V Start Voltage >...
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Technical Information Table 7-1B: Specifications Model M15A_220 M20A_220 Efficiency Peak Efficiency 98.4 % 98.5 % 97.9 % 98.1 % Euro Efficiency Information Communication Port RS-485 (built-in) / Wi-Fi (built-in) / SUB_1G (optional) Regulation IEC 62920 VDE-AR-N 4105 IEC 61439-2 VDE-AR-N 4110 Grid support IEC 62109-1/-2 EN/IEC 61000-6-1/-2...
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Technical Information Efficiency Output voltage at 400Vac Efficiency(%) Pn=15kW 380V 600V 900V 100% Output Power (%) Efficiency(%) Pn=20kW 480V 600V 800V 900V 100% Output Power (%) Figure 7-1: Efficiency Curve...
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Technical Information Power Derating Curve with Ambient Temprature Output voltage at 230Vac / 400Vac P/Pn(%) PF=1 Pn=20kW 110% 100% 90 % 80 % 480V 70 % 600V 900V 60 % Ambient Temperature (°C) Figure 7-2: Power Derating Curve with Ambient Temprature (PF=1) Power Derating Curve with Ambient Temprature Output voltage at 230Vac / 400Vac P/Pn(%)
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Technical Information Power De-rating Curves with PV Voltage Output voltage at 230Vac / 400Vac PF=1 P/Pn(%) Pn=20kW 120% 100% 80 % 60 % 40 % 35 ⁰C 40 ⁰C 20 % 50 ⁰C 1000 PV Voltage (V) Figure 7-4: Power De-rating Curves with PV Voltage...
Technical Information Appendix: Assembly Note ① ② ③ Appendix-1: Assembly Note-1 Location Screw torque Wi-Fi module cover 8.0 kgf-cm (0.8N• m) Communication cover 8.0 kgf-cm (0.8N• m) SUB_1G case 10.2 kgf-cm (1N•m)
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Technical Information ① ② ③ ④ ⑤ ① ② ④ ⑤ H4CFC4D-MS H4CMC4D-MS Appendix-2: Assembly Note-2 Location Screw torque Conductor cross-section AC SPD board 8.0 kgf-cm (0.8N•m) DC SPD board 8.0 kgf-cm (0.8N•m) 7.1 kgf-cm (0.7N•m) 8 AWG (8 mm ² )~6 AWG (14 mm ² ) AC wire Communication port 20 AWG (0.5mm²)
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三相併網型變流器 M15A_220 / M20A_220 操作手冊 English 繁體中文 www.deltaww.com...
產品介紹 ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ 圖 2-2 : 外觀 表 2-2 : 外觀介紹 Component Component Component Toggle Latch DC Switch SUB_1G module port (option) Cable gland for AC output Wi-Fi Antenna port Cable gland for RS-485 DC input (H4) x 4 strings...
安裝 3.3.4 交流配線 1. 產品包裝中附有一組交流接頭配件,請將接頭拆解成A和B兩個部分 (圖 3-9) 2. 將妥善包覆後的交流電纜安裝至A部分(電纜密封套),並將電纜內部的交流線材依下圖所 示之扭矩值分別鎖附至B部分 (圖 3-11) 3. 將A和B兩個部分妥善組裝如圖3-12所示,組裝完成後再安裝至變流器交流端對應接頭上 圖 3-9 : 組裝交流接頭 130 - 138 (REF) Cable range: 20~26 mm Part A Cable range Part A fastening torque Part B fastening torque N ・ m N ・...
試運行 4.2 自動ID設定 自動ID設定功能可以一次設定所有變流器ID,連接RS-485透過的裝置可以透過 DSS (Delta Solar System)設定,連接Wi-Fi的裝置請透過MyDeltaSolar APP進行 自動ID設定。 4.2.1 DSS連接 ① 點選 “Commission Tool“ ② 點擊 “RS485“ ③ 選取通訊端 (程式自動偵測) ④ 點擊 ② ① ④ ③ 圖 4-2 : DSS連接...
試運行 4.3 Delta功能設定 Delta 提供兩種機器設定方式 : DSS (Delta Solar System Software) 與 APP(MyDeltasSolar) 功能列表 Active power control Q(U) control (volt-var control) P-F control (watt-frequecy control) Q by night(Q setting 24/7) P(U) control (volt-watt control) Anti-PID Fixed cosφ Dry contact Fixed Q(%)
維護 5.2 更換雷擊保護裝置 (SPD) M15A_220 / M20A_220 在交流與直流端皆具有可更換的雷擊保護裝置。 AC SPD DC SPD 圖 5-3 : 交流與直流側雷擊保護裝置位置 交流側 直流側 圖 5-4 : 交流與直流側的雷擊保護裝置 當APP或DSS出現故障訊息「W18- AC Surge」 或 「W17- DC Surge」時, 請 遵循以下步驟更換雷擊保護裝置。...
技術資料 7 技術資料 表 7-1A: 規格 Model M15A_220 M20A_220 直流輸入 1100 V * 最大輸入電壓 工作電壓範圍 200 - 1000 V @ AC400V 380 - 900 V 480 - 900 V MPP 電壓範圍 > 250 V 啟動電壓 600 V 輸入電壓 最大輸入電流 25 A / MPPT, Total: 45 A 26 A / MPPT, Total: 48 A 最大輸入功率...