Sungrow SG285HX Technical Document

Grid-connected pv inverter

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Technical Handover Document

Grid-Connected PV Inverter

SG285HX / SG320HX / SG333HX / SG350HX

SG285_320_333_350HX-UEN-Ver11-202506

Grid-Connected PV Inverter

Technical Handover Document

SG285HX / SG320HX / SG333HX / SG350HX

SG285_320_333_350HX-UEN-Ver11-202506

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Summary of Contents for Sungrow SG285HX

Page 1 Technical Handover Document SG285HX / SG320HX / SG333HX / SG350HX Grid-Connected PV Inverter Technical Handover Document SG285_320_333_350HX-UEN-Ver11-202506 Grid-Connected PV Inverter SG285HX / SG320HX / SG333HX / SG350HX SG285_320_333_350HX-UEN-Ver11-202506...
Page 2 Project Information Form table 0-1 Project Information Form Project Name Project Address Contractor Scope of Delivery Device Model & Quantity Handover Details Signature of Receiver Name: Date (MM/DD/YYYY): Signature of Issuer Name: Date (MM/DD/YYYY):...
Page 3 Safety Disclaimer and Symbol Descriptions...
Page 4 Contents Project Information Form....................I Safety Disclaimer and Symbol Descriptions..............II 1 Pre-Installation Checklist ..................1 1.1 Personnel Requirements..................5 2 Unpacking and Inspection ................. 6 2.1 Recommended Unpacking Procedure..............6 2.2 Scope of Delivery....................6 2.3 Product del producto.................... 6 2.4 Terminal Description..................... 8 3 Inverter Storage ....................
Page 5 5.6 RS485 Connection....................30 6 PLC Communication Connection ..............31 6.1 Application Scenarios..................31 6.2 PLC Wiring Rules....................33 6.3 PLC Wiring......................37 7 Commissioning Procedure ................40...
Page 6 Inspection components for damage, and check if the packing list matches the order placed. If any discrepancies or damage are found, do not install the device and contact SUNGROW immediately. Environmental Do not install the device in a place Requirements prone to water leakage, e.g., under...
Page 7 1 Pre-Installation Checklist Technical Handover Document Checked (✔) / Not Inspection Item Inspection Details Completed (×) External 1 The external protective grounding Grounding Cable point provides a reliable ground Requirements connection. improper grounding conductor grounding, Otherwise, may cause product damage or personal injury.
Page 8 Technical Handover Document 1 Pre-Installation Checklist Checked (✔) / Not Inspection Item Inspection Details Completed (×) Side 1 The inverter does not support Requirements the full parallel connection of PV strings (Full parallel connection refers to a connection method in that strings are connected in parallel and then connected to the inverter separately).
Page 9 1 Pre-Installation Checklist Technical Handover Document Checked (✔) / Not Inspection Item Inspection Details Completed (×) Wiring 1 Cable from MV substation to Requirements inverter: If using multi-core AC cables, the length must be ≤ 990 m. 2 Cable from MV substation to communication box or external PLC module: •...
Page 10 Technical Handover Document 1 Pre-Installation Checklist 1.1 Personnel Requirements 1 Each equipment installation should involve a team of at least 4 to 5 trained professionals, with at least one electrical specialist supervising the installation. Team size should be adjusted based on terrain complexity. Maintain fixed crew assignments throughout the project.
Page 11 • Check the scope of delivery for completeness according to the packing list. • Check the inner contents for damage after unpacking. Contact SUNGROW or the transport company in case of any damage or incompleteness, and provide photos to facilitate services.
Page 12 Technical Handover Document 2 Unpacking and Inspection Appearance The following figure shows the appearance of the inverter. 图 1: Appearance The image shown here is for reference only. The actual product received may differ. Name Description LED indicator To indicate the current working state of the inverter. To connect AC cable and tracking system power cable in this AC junction box area.
Page 13 图 2: Product Dimensions(in mm) Weight Model Weight SG285HX / SG320HX / SG333HX / SG350HX ≤ 116 kg 2.4 Terminal Description All electrical terminals are located at the side and bottom of the inverter. 图 3: Terminal Description (One Wire per Phase with Multi-core Cable)
Page 14 Technical Handover Document 2 Unpacking and Inspection 图 4: Terminal Description (Two Wires per Phase with Multi-core Cable) * The image shown here is for reference only. The actual product received may differ. Item Terminal Mark Note 24 / 32, PV connector PV terminals + / - The number of PV terminals varies, subject to...
Page 15 3 Inverter Storage Proper storage is required if the inverter is not installed immediately. • Store the inverter in the original packing case with the desiccant inside. • The storage temperature must be always between -40℃ and +70℃, and the storage relative humidity must be always between 0 and 95 %, non-condensing.
Page 16 4 Installing the Inverter 4.1 Location Requirements To a large extent, a proper installation location ensures safe operation, service life, and performance of the inverter.
Page 17 4 Installing the Inverter Technical Handover Document 4.2 Installation Environment Requirements • The inverter produces noise during operation, thus it is not recommended to install it in places for residential purpose. If this cannot be avoided, it is recommended to install the inverter in a place over 25 meters away from the residential area, or take noise mitigation measures.
Page 18 • Please consult SUNGROW before installing inverters outdoors in areas prone to salt damage, which mainly are coastal areas within 500 meters of the coast. The sedimentation...
Page 19 4 Installing the Inverter Technical Handover Document • To avoid disturbing residents in living areas with noise generated during the operation of the device, do not install the inverter in noise-sensitive areas such as bedrooms. It is preferable to choose an open location that is far away from the living and resting areas. •...
Page 20 Technical Handover Document 4 Installing the Inverter 4.4 Pole-Mounting 4.5 Angle Requirements Install the inverter vertically or tilt backwards. Do not install the inverter horizontally, forward, excessively backward, sideways, or upside down.
Page 21 4 Installing the Inverter Technical Handover Document In case the installation site is a level surface, mount the inverter to the bracket to meet the mounting angle requirements, as shown in the figure below. Take the following items into account when designing the bracket scheme: •...
Page 22 Technical Handover Document 4 Installing the Inverter 4.6 Installation space required for the inverter with air outlets on the side (standard configuration) The inverter with air outlets on the side is the standard configuration. For related installation space requirements, please refer to the following details. Space around the inverter Make sure there is sufficient space around the inverter for good ventilation.
Page 23 4 Installing the Inverter Technical Handover Document Run the AC cable into the AC terminal vertically, and make sure the cable is kept vertical for a length of ≥200mm. Air inlets/outlets of the inverter Make sure there is no obstruction to the inverter's air inlets/outlets, to avoid impacting its heat dissipation.
Page 24 Technical Handover Document 4 Installing the Inverter Inverters installed in one row When installing multiple inverters, reserve sufficient space between the inverters. It is recommended to position them in one row. Inverters installed back-to-back For two inverters installed back-to-back, the distance between them should be at least 600mm. When installing more than two inverters back-to-back, sufficient space should be reserved between the adjacent inverters.
Page 25 Installation Environment Requirements. In case the environment where the product is installed does not meet the requirements, SUNGROW shall not be held liable for any property damage arising therefrom. • During installation, ensure that no device in the system causes it hard for the DC switch and the AC circuit breaker to act or hinders maintenance personnel from operating.
Page 26 Technical Handover Document 4 Installing the Inverter • If drilling is required during installation: - Wear goggles and protective gloves when drilling holes. - Make sure to avoid the water and electricity wiring in the wall before drilling. - Protect the product from shavings and dust.
Page 27 5 Electrical Connection 5.1 Electrical Connection Precautions • Must ensure that cables are voltage-free with a measuring instrument before touching DC cables. • Respect all safety instructions listed in relevant documents about PV strings. • Before electrical connections, please make sure that the inverter switch and all switches connected to the inverter are set to "OFF", otherwise electric shock may occur! •...
Page 28 Technical Handover Document 5 Electrical Connection • Before connecting a power cable (such as the AC cable, the DC cable, etc.), confirm that the label and identifier on the power cable are correct. • When laying out communication cables, separate them from power cables and keep them away from strong interference sources to prevent communication interruption.
Page 29 • It is suggested that the external protective grounding terminal and the AC side grounding terminal are both connected to ground. Other grounding schemes, which meet the local standards and safety regulations, may also be adopted. However, SUNGROW shall not be held liable for any consequence caused thereby.
Page 30 Technical Handover Document 5 Electrical Connection 5.4 AC Cable Connection 5.4.1 Requirements for OT/DT Terminal OT/DT terminals (not included in the delivery scope) are required for fixing AC cables to the terminal block. Purchase the OT/DT terminals according to the following requirements. OT/DT Terminals of Phase Wire (One Wire per Phase with Multi-core Cable) •...
Page 31 5 Electrical Connection Technical Handover Document Requirements for Flat Washer If the OT terminal's hole diameter is between 16.5mm and 21mm, add a flat washer made of 316/304 stainless steel between the OT terminal and the M12 nut. The size of the flat washer and the connection method are provided below.
Page 32 Technical Handover Document 5 Electrical Connection After completing the AC side wiring, seal the AC cable entry points with fireproof mud and ensure that the AC output cables and PE wires are securely fastened. Failure to do so may result in operational failure, or terminal block damage caused by overheating from unreliable connections during operation.
Page 33 5 Electrical Connection Technical Handover Document 5.5 DC Cable Connection 5.5.1 Installing PV Connector Terminal Configuration Description Please refer to the following requirements for DC terminal connection: • If the number of actual PV strings is less than the number of PV strings that can be connected to the inverter, ensure that each MPPT is connected with at least one string.
Page 34 Technical Handover Document 5 Electrical Connection 图 4: Terminal connection Description NOTICE • Make sure the PV array is well insulated to ground before connecting it to the inverter. • Make sure the maximum DC voltage and the maximum short circuit current of any string never exceed inverter permitted values specified in "Technical Data".
Page 35 5 Electrical Connection Technical Handover Document 5.6 RS485 Connection...
Page 36 6 PLC Communication Connection With a PLC communication module built inside, the inverter can communicate with the Data Logger provided by SUNGROW. For specific wiring method, refer to the user manual for the data logger. • The Data Logger is an optional device that can be ordered from SUNGROW.
Page 37 6 PLC Communication Connection Technical Handover Document figure 6-1 PLC wiring diagram for a double-winding transformer figure 6-2 PLC wiring diagram for a double-split transformer Description of parameters in the diagrams is listed in the table below.
Page 38 Technical Handover Document 6 PLC Communication Connection Parameter Description Cable Specification Length • If using multicore AC cable, the length should be cable from com ≤990m. munication • If using single-core AC cable: to box-type trans - When D2 ≤ 3m, the single-core cable length former should be ≤790m.
Page 39 6 PLC Communication Connection Technical Handover Document • The cable should be laid in cable trenches, cable ducts, or conduits. • The cables should be laid parallel without any knots or twists. • For three-phase single-core cables, they should be fixed every 1 meter and arranged in a "triangular"...
Page 40 Technical Handover Document 6 PLC Communication Connection wiring using single-core cables, the requirements for both sets of cables and the frequency band settings are the same as mentioned above. 图 3: Two-wire-per-phase wiring scheme PLC wiring requirements • The distance between low-voltage AC cables and medium-voltage AC cables should meet the following requirements: - Maintain a minimum horizontal distance of 0.5m between low-voltage AC cables and medium-voltage AC cables when laid parallel.
Page 41 6 PLC Communication Connection Technical Handover Document - If two cables are laid in a crossing manner, the angle of crossing should be between 60° and 120°, and the vertical distance should be no less than 0.5m. • Only AC cables under the same box-type transformer can be laid in the same cable trench. •...
Page 42 Technical Handover Document 6 PLC Communication Connection - If two cables are laid in a crossing manner, the angle of crossing should be between 60° and 120°, and the vertical distance should be no less than 0.5m. 图 4: Vertical crossing distance between PLC cables Wiring from communication box to box-type transformer •...
Page 43 6 PLC Communication Connection Technical Handover Document 3 Crimp the OT terminals (OT2.5-6 is recommended). 4 Connect the cable to the corresponding terminal, as shown in the figure below. figure 6-5 Three-phase three-wire method The coupling point for connecting the PLC cable to the box-type transformer bus bar is recommended to be arranged in the position corresponding to the middle of the busbar.
Page 44 Technical Handover Document 6 PLC Communication Connection • For parameters of the circuit breaker on the box-type transformer side, you may refer to the parameters of EMU200A’s internal circuit breaker in the above figure. • Please pay attention to the phase sequence of cables and terminals in the wiring process.
Page 45 7 Commissioning Procedure If all of the items mentioned above meet the requirements, proceed as follows to start up the inverter for the first time. step 1 Rotate one DC switch of the inverter to the "ON" position. When the indicator blinks blue slowly, turn the other DC switches to the “ON”...

This manual is also suitable for:

Sg320hx Sg333hx Sg350hx