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: • M70A_263 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.
⑥ ⑦ ⑧ Figure 2-1: Components Table 2-1: Packing list M70A_263 Object Description Delta Solar Inverter 1 pc Solar inverter Important instructions for solar inverter. User Manual 1 pc Safety instructions should be followed during installation and maintenance. Wall mounting bracket...
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Introduction SUB_1G Antenna (optional) External Fans DC Switch Toggle Latch RS-485 AC Output x4 Wi-Fi Antenna DC Input (H4) PE Gland (optional) x 12 strings Figure 2-2: Overview...
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Introduction Figure 2-3 below, shows the certification and rating label. Table 2-2 defines the symbol markings on this label. Figure 2-3: Rating label Table 2-2: 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.
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Introduction ⑤ ⑨ ⑥ ⑦ ⑩ ① ③ ⑧ ② ④ Figure 2-5: Layout Table 2-3: layout description Component Component Component 4x M40 glands for AC Output Type II DC SPD Communication module Cable gland for COMM. wiring AC terminal Internal fan 1 Internal fan 2 Grounding (M6 threaded stud)
Installation 3 Installation CAUTION ! - In some locations, mounting the inverter in direct sunlight may cause the inverter to enter a thermal derating mode. To eliminate this concern, a shade structure over the inverter chassis may be necessary. WARNING ! - Do not install the unit near or on flammable surfaces.
Installation 3.1 Unboxing & Review Unpacking the case, please follow the order of Figure 3-1. It could be transported by 2 people (Figure 3-2) . For ground mount installation It is recommended to install the grounded brackets first at this step. For detailed installation methods, Need more than please see section 3.2.2.
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Installation Manual handling Do not hold fan, fan shutter, DC connectors, DC switches nor AC glands, it may cause damage to certain components. Hoisting After hoisting, please keep the screw plugs on the casing to prevent water from entering. Screw plug Hoisting ring (4 N-m) (M12 x P1.75, L ≤...
CAUTION ! Protection cover To avoid malfunction of inverter caused by extreme weather (ex: snow, hail…etc) or non-proper installation/ maintenance, an additional protection cover is strongly recommended to be installed by DELTA. For more details, please contact local service team.
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Installation 699 mm 264 mm Figure 3-3: Inverter dimensions unit: mm Figure 3-4: Mounting bracket dimensions...
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Installation Positions for least amount of mounting bracket screws Figure 3-5 : Positions of mounting screws >280mm Figure 3-6: Permitted mounting positions...
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Installation Figure 3-7: Prohibited mounting positions When using flexible metal conduit, please reserve at least 565mm for installing space. Wall > 990mm > 320mm > 415mm > 840mm > 700mm Inverter #1 Inverter #2 > 1300mm > 708mm > 570mm Figure 3-8: Required mounting clearances...
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Installation When using flexible metal conduit, please reserve at least 450mm for conduit bending space. Wall Without Clapboard >200mm >200mm >300mm >600mm >300mm >60mm * >60mm * * If the installation location has a risk of flooding or snow, please raise to appropriate height. Clapboard Install Clapboard dimension...
Installation 3.2.2 Ground Mount (optional) ATTENTION - Ensure the grounded base is strong enough to hold the weight of the inverter. Grounded Bracket kit is an optional part, please contact the customer service center for the detail. 1. Fix the grounded brackets to the bottom of the inverter as Figure 3-10. 2.
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Installation Φ12.5 unit: mm 651.4 height * * If the installation location has a risk of flooding or accumulated snow, please raise the appropriate height of the inverter. Figure 3-11: To secure inverter grounded brackets to ground-mounting base...
Installation 3.3 Door In order to ensure the normal long-term operation of the inverter, please follow the procedures in Section 5.1 to open and close the door. After opening the door, please make sure the door is fixed by hexagon driver as shown below.
Installation 3.4.1 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 230/400V 230/400V...
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Installation M70A_263 support Cu stranded wire, Cu flexible conducor, Al stranded wire and aluminum solid (include sector wire). Cu stranded Cu flexible wire Al stranded Aluminum solid (need press with terminal) (sector) * • Cu: The Cu flexible wire need stamp with terminal, for the other model wiring with bear wire is available.
Installation 3.4.4 AC Side –Prewire Set-Up Prior to install conductors on the terminal, please complete the following procedure to make terminals ready for connections. For each of the AC terminals (L1, L2, L3, N): Tighten / Lose nuts with 8 mm hex wrench. If an electric tool is used, insure the torque setting is low enough to NOT OVER-TORQUE the nuts.
Installation 3.4.5 AC Wiring After inserting conductor, torque terminal nut by 31 N • m (PE: 14.7 N • m) Figure 3-14: Location for AC entry and AC terminal (1) Ensure the AC disconnect device is in “OFF” (2) Strip off the insulation of each cable by 30mm. (3) For the aluminum conductor, remove the oxide film of the conductor surface and apply the protective grease.
Installation 3.5 Electrical Installation for DC Wiring DANGER : ELECTRICAL HAZARD!! - PV array converts sunlight into electric power with high DC voltage and high DC current which can cause dangerous electrical shock hazard! - Use an opaque material to cover the PV array before wiring or cabling. - Ensure the correct polarities are connected when DC cabling is applied.
Installation 3.5.1 DC Wiring 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. •...
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Installation SWITCH 1 SWITCH 2 Figure 3-16: location of H4 connectors to connect array wiring (DC)
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Installation PUSH PUSH To prop up connectors, frames should be installed beneath. Figure 3-17: Installation methods for protective frame...
Installation 3.5.2 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 3-18. Screw torque: M6/ 3.9 N•m Figure 3-18: Mount the equipment grounding...
Figure 3-19 ~ 3-21. ATTENTION - Always keep nut and screws properly tightened on the case. Water leakage may cause serious damage. Contact DELTA service when lack for nut and screws. - Store the nut for spare usage. Antenna Location Save the nut after antenna installed.
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Installation >20cm There must be no obstacles within 20 cm around the antenna. Keep antenna pointing upright. Figure 3-20: Attentions of installing antenna...
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Installation 1. Remove the screws on the case and turn the antenna counterclockwise by about 45 degrees. 2. Put on the antenna bracket. 3. Turn the antenna to the proper position. 4. Tighten the 3 screws in the antenna package to the antenna bracket. ①...
Installation 3.7 Communication Module Connections The communication module of M70A is shown in Figure 3-22. It provides VCC, RS-485, dry contact, EPO, and Digital Input terminals for use in various applications. Details for each are presented below. There's a 12VDC source between VCC & GND for use with external device. VCC *1 &...
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Installation Please refer to the chapter 5.1 and open the door, the communication module is at the red circle that is shown in Figure 3-23. Φ7.2mm* Φ10mm Φ7.2mm* Φ10mm * Remove the rubber stopper in the Φ7.2 mm hole can extend it to Φ8.7 mm for use.
Installation 3.7.1 RS-485 Connection The pin definition for the RS-485 terminal block is shown in Table 3-1. - Pins 1 and 2 provide a 12VDC / 0.5A bus for use with accessories. - Pins 3 and 5 are both connected to the DATA+ input. - Pins 4 and 6 are both connected to the DATA - input.
3.7.2 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). VCC K0 K1 K2 K3 K4 K5 K6 Figure 3-25: EPO function terminal block Once enabled, the EPO function can be used to turn off the inverter via a NO relay contact connected across terminal [VCC &...
Installation 3.7.3 Dry Contact Connection M70A_263 provide dry control contact pairs that may be used to control external devices based on the status of operation of the inverter. The terminal block for this function is shown in Figure 3-26. The terminals marked in the figure identify the dry contact connection.
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 appropriate personal protection gear is worn. 4.1 Display Operation Introduction With 3 LEDs allow visual display of the inverter’s data and status as shown in Figure 4-1.
(iOS user) (Android user) DeltaSolar About OS version iOS: 8.0 and above Android OS: Android DELTA ELECTRONICS, INC. 8.0 and above QR Code Android Start Commissioning the Inverter ① Enable the Bluetooth function of your mobile device. ② Click the Bluetooth icon on the bottom right corner.
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Commissioning ④ Select “Local Setting” sheet and click “Grid Setting”. ⑤ Click “Inverter ID” to select the required ID and then click “Inverter ID Set”. ⑥ Click “Country” to select the required grid code and then click “Set”. ⑦ Done. Figure 4-3: Steps to commission via bluetooth (4-7)
Commissioning 4.3 Commission multiple inverters – Auto ID Function The Auto ID function can set all inverter IDs at once by DSS (Delta Solar System) or DeltaSolar APP. - DSS Connect the inverter through RS-485 or Wi-Fi with computer. - APP Connect the inverter through Wi-Fi with mobile device.
Commissioning 4.3.2 Scan inverter ① Click “Auto ID ”. ② Enter numbers of inverters. ③ Click “Scan Inverters”. ① ② ③ Figure 4-5: Steps of scanning inverters...
Commissioning 4.3.3 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 4-6: Steps of ID setting...
Commissioning 4.3.4 Set Country ① Click to select the country of inverter. ② Click “Set Country”. ① ② Figure 4-7: Steps of country setting 4.3.5 Synchronize time Click “Sync Clock ” to Synchronize time. Figure 4-8: Steps of time synchronization...
Commissioning 4.4 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...
Maintenance 5 Maintenance Please check the unit regularly. If there are any impaired or loose parts, please contact your solar installer. Ensure that there are no fallen objects in the path of the heat outlet. WARNING ! - Prior to beginning any maintenance procedures outside AC breaker and DC switch off to avoid risk of electrical shock! 5.1 Open and Close the Door In order to guarantee proper long-term operation of the inverter, the following...
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Maintenance ① ② * Screw torque: M4 / 0.98 N•m ③ ⑤ ② ④ ① Figure 5-1: Opening and closing the door...
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Maintenance ATTENTION - After opening the door, please make sure the door is fixed by hexagon driver to avoid strong wind breaking it. Figure 5-2: To secure door by hexagon driver ① ② security seal ③ ④ ⑤ Figure 5-3: Apply a security seal on the toggle latch...
Maintenance 5.2 Replacement of Surge Protection Devices (SPD) M70A_263 have the surge protection device (SPD) at both AC and DC side as shown in Figure 5-4. DC SPD AC SPD Figure 5-4: AC and DC SPD modules...
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Maintenance Surge protection devices (SPD) are designed to protect sensitive circuit elements of the inverter from damage caused by lightning and other electrical transients/surges, as such they are sacrificial components and periodically, may need replacement. The SPDs are located in the inverter. If a warning message “AC Surge”...
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Maintenance • Accessing the door 1. Switch DC and AC power off and wait until LED display turns off. 2. To access the door, use procedure found in Section 5.1.1 Do not leave the door opened for long periods of time. •...
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Maintenance DC SPD AC SPD * Screw torque: 0.8 N•m Please use manual pre-tighten before attaching. Figure 5-6: Steps of changing SPDs...
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Maintenance AC SPDs * A: Screw torque 2.45 N •m * G: Screw torque 0.8 N •m Figure 5-7: Remove wirings as connectors of AC SPD *Wi-Fi (option) DC SPDs * A: Screw torque 2.45 N • m * G: Screw torque 0.8 N •m Figure 5-8: Remove wirings as connectors of DC SPD...
Maintenance 5.3 External String Fuse According to different local regulations, if the external string fuse is required, please contact Delta dealers. XX: Fuse rating 20A / 25A / 30A Figure 5-9: External String Fuse 5.4 Smart Fans Replacement and Filter Cleaning M70A_263 is provisioned with processor-controlled "smart fans"...
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Periodic fan and filter cleaning is required to insure long life and reliability. - The time period between cleanings depends on the quality of the environment. - Under normal duty use, Delta recommends smart fans and filters be cleaned every 4 months - For very dusty locations, it may be necessary to clean the fans and filters quarterly or monthly.
Maintenance WARNING ! - Prior to beginning any maintenance procedures outside AC breaker and DC switch off to avoid risk of electrical shock! 5.4.1 Power Module (PM) Fan Tray The inverter electronics are convection cooled. The primary equipment used for this function consists of a fan tray located in a plenum within the inverter.
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Maintenance * Screw torque required for assembling: 1.4 N•m ① ② snap-fit ③ * Screw torque required for assembling: 0.6 N•m Figure 5-11: Disassembling fan tray from PM chassis...
Maintenance 5.4.2 Internal Fan 1 Procedure to remove Internal Fan 1 (1) Remove the B cover. (2) Loosen two self-retaining screws shown in Figure 5-12 and remove the fan cabinet. (3) Disconnect the power connector on the DC SPD board. (4) Lift the entire fan assembly.
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Maintenance * Screw torque required for assembling: 0.8 N•m Figure 5-13: Take off the internal fan 1 * Screw torque required for assembling: 0.6 N•m Figure 5-14: Replace with a new fan...
Maintenance 5.4.3 Internal Fan 2 Procedure to remove Internal Fan 2 (1) Loosen two self-retaining screws shown in Figure 5-15 and remove the fan cabinet. (2) Disconnect the power connector on the comm. board. (3) Lift the entire fan assembly. (shown in Figure 5-16) (4) Clean assembly or replace with a new fan.
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Maintenance * Screw torque required for assembling: 0.8 N•m Figure 5-16: Take off the internal fan 2 * Screw torque required for assembling: 0.6 N•m Figure 5-17: Replace with a new fan...
Maintenance 5.5 De-Commissioning When necessary to remove the inverter from active operation for maintenance or replacement, follow the instructions below. DANGER : ELECTRICAL HAZARD!! To avoid serious injury, please follow the procedure below. - Switch off external AC circuit breaker or switch to disconnect the electrical grid from the inverter chassis.
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Maintenance CAUTION : HOT SURFACES, DO NOT TOUCH ! - Use care not to touch hot surfaces if the inverter is just shutting down. - Do not perform any task until the product cool down sufficiently. CAUTION : POSSIBILE INJURY ! M70A_263 weighs 69 kg.
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 following table to attempt to clear the fault.
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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...
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 M70A_263 DC Input Occasionally Max. voltage 1100 V * Operating Voltage Range 200 - 1000 V MPP Voltage Range (Full Power) 460 - 900 V * Start Voltage > 250 V Rated Voltage 600 V Max.
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Technical Information Table 7-1B: Specifications Model M70A_263 Efficiency Peak efficiency 98.8 % 98.4 % Euro efficiency Information Communication Port RS-485 / Bluetooth (built-in) ; SUB_1G / Wi-Fi (optional) Regulation VDE-AR-N 4110 IEC 62109-1/-2 VDE-AR-N 4105 EN 61000-6-2 VDE 0124-100 EN 61000-6-3 NB/T 32004: 2018 CNS 15382 GB/T 19964: LVRT...
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Technical Information Efficiency of M70A Output voltage at 400Vac Efficiency(%) Pn=70kW 100% 520V 600V 800V 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 PF=1 P/Pn(%) Pn=70kW 110% 100% 90 % 80 % 70 % 60 % 460V 520V 50 % 600V 720V 800V 40 % 900V 30 % 20 % Ambient Temperature (°C) Figure 7-2: Power Derating Curve with Ambient Temprature (PF=1)
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Technical Information Power Derating Curve with Ambient Temprature Output voltage at 230Vac / 400Vac PF=0.9 P/Pn(%) Pn=70kW 110% 100% 90 % 80 % 70 % 60 % 460V 520V 50 % 600V 720V 800V 40 % 900V 30 % 20 % Ambient Temperature (°C) Figure 7-3: Power Derating Curve with Ambient Temprature (PF=0.9)
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Technical Information Apparent Power Derating Curve with Ambient Temprature Output voltage at 230Vac / 400Vac PF=0.9 S/Sn(%) Sn=70kVA 110% 100% 90 % 80 % 70 % 60 % 460V 520V 50 % 600V 720V 800V 40 % 900V 30 % 20 % Ambient Temperature (°C) Figure 7-4: Apparent Power Derating Curve with Ambient Temprature (PF=0.9)
Appendix: Assembly Note Appendix: Assembly Note ③ ④ ① ⑤ ② ⑥ Appendix-1: Assembly Note-1 Location Screw torque Filter 14 kgf-cm (1.4N• m) Fan Tray 6 kgf-cm (0.6N•m) Antenna 12 kgf-cm (1.2N•m) Antenna Bracket (M4) 10 kgf-cm (0.98N•m) Grounded Bracket 250 kgf-cm (24.5N•m) Grounding (M6) 40 kgf-cm (3.9N•m)
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Appendix: Assembly Note ③ ① ② ④ ⑤ H4CFC4D-MS H4CMC4D-MS Appendix-2: Assembly Note-2 Location Screw torque Conductor cross-section Internal Fan 2 Cover 8.0 kgf-cm (0.8N•m) Internal Fan 2 Tray 6 kgf-cm (0.6N•m) Internal Fan 1 Cover 8.0 kgf-cm (0.8N•m) Internal Fan 1 Tray 6 kgf-cm (0.6N•...
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Appendix: Assembly Note ① ① ④ ⑤ ③ ④ ⑥ ② ③ ② ⑤ ④ Appendix-3: Assembly Note-3 NO Location Screw torque Conductor cross-section DC SPD board A: 25 kgf-cm (2.45N•m) G: 8.0 kgf-cm (0.8N •m) AC SPD board AC Cover 8.0 kgf-cm (0.8N•m) Toggle Latch 25 kgf-cm (2.45N•m)
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The power behind competitiveness 三相併網型變流器 M70A_263 操作手冊 English 繁體中文 www.deltaww.com...
安裝 3.4.4 交流側- 配線前準備 在進行導線與端子座安裝連接之前,請遵循以下步驟。 對於每個交流端子(L1,L2,L3,N): 請用8 mm六角板手進行拆裝螺絲。如果使用電動工具進行施工,請確保使用適 當扭力值,避免超過或不足擰緊螺絲的扭力值。當鎖附螺絲頂到最低點時,請勿 再進行鎖附,避免造成端子座損傷。 Cable diameter range Torque Dimension of P 21.7-28.9 mm 5.5-10 1.0-8.0 mm N • m 16.2-21.7 mm 1.0-6.5 mm N • m 12.0-16.2 mm 4.0-6.5 1.0-7.5 mm N • m 注意: 有可能產生高溫: 若壓接點的阻抗過高,該點則有可能產生高溫導致火災。...
試運行 4.3 多台裝置初始設定-Auto ID 透過以下兩種軟體可以使用自動ID設定功能,一次設定所有變流器ID - DSS (Delta Solar System) 變流器可透過RS485接線或是Wi-Fi連接至電腦,使用DSS進行設定。 - DeltaSolar APP 變流器透過Wi-Fi連接行動裝置(智慧型手機、平板等),使用APP進行設定。 4.3.1 DSS連接 ① 選取欲設定的機種 ② 點擊 “RS485“ ③ 選取通訊端 (程式自動偵測) ④ 點擊 ② ① ④ ③ 圖 4-4 : DSS連接...
試運行 4.3.4 國別設定 ① 選取變流器國別 ② 點擊 “Set Country” ① ② 圖 4-7 : 國別設定 4.3.5 時間同步設定 點擊“Sync Clock ” 以同步時間設定 圖 4-8 : 時間同步設定...
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試運行 4.4 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 AC SPDs * A: Screw torque 2.45 N •m * G: Screw torque 0.8 N • m 圖 5-7 : 移除AC SPD 螺絲與排線 *Wi-Fi (option) DC SPDs * A: Screw torque 2.45 N •m * G: Screw torque 0.8 N • m 圖...
技術資料 7 技術資料 表 7-1A: 規格 Model M70A_263 直流輸入 1100 V * 最大輸入電壓 200 - 1000 V 工作電壓範圍 460 - 900 V * MPP 電壓範圍 (全功率) > 250 V 啟動電壓 600 V 額定電壓 Each MPPT * : 26 A, Total: 156 A 最大輸入電流...
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