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SUN2000-(25KTL, 30KTL)-US
User Manual

5 Electrical Connections

Issue 03 (2017-04-01)

Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

60



When connecting the SUN2000 output power cable, you can choose whether to connect
the neutral wire or not according to the local national regulations and installation
specifications.



AC output terminals must be parallel.



When installing the AC output power cable, the torque must not exceed 6 N·m. Otherwise,
the AC terminal block may be damaged.



Ensure that the AC output power cable is securely connected. Otherwise, the SUN2000
may fail to operate or the terminal block may be damaged after the SUN2000 operates.

Figure 5-12

Connecting AC output power cables

(1) Neutral wire nor PE wire connected

(2) Neutral wire connected, PE wire not

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Summary of Contents for SUN2000-(25KTL, 30KTL)-US

Page 1: ...SUN2000 25KTL 30KTL US User Manual Issue 03 Date 2017 04 01 HUAWEI TECHNOLOGIES CO LTD ...

Page 2: ...e customer All or part of the products services and features described in this document may not be within the purchase scope or the usage scope Unless otherwise specified in the contract all statements information and recommendations in this document are provided AS IS without warranties guarantees or representations of any kind either express or implied The information in this document is subject...

Page 3: ...nce prevails This document is subject to update and revision You can register an account log in to http support huawei com carrier browse or search for this document on the Product Support tab page and download the latest version Intended Audience This document is intended for photovoltaic PV power station personnel and qualified electrical technicians Symbol Conventions The symbols that may be fo...

Page 4: ...OTE is used to address information not related to personal injury equipment damage and environment deterioration Change History Changes between document issues are cumulative Therefore the latest document issue contains all updates made in previous issues Issue 03 2017 04 01 Updated 10 Technical Specifications Issue 02 2017 02 20 Updated Installation Environment Requirements of 4 3 Wall mounting t...

Page 5: ...ition 23 4 3 2 Moving the SUN2000 28 4 3 3 Installing a Rear Panel 29 4 3 4 Installing the SUN2000 32 4 4 Installing a Common Support 36 4 4 1 Determining the Installation Position 36 4 4 2 Moving the SUN2000 38 4 4 3 Installing a Rear Panel 38 4 4 4 Installing the SUN2000 40 4 5 Installing a Tilted Support 41 4 5 1 Determining the Installation Position 41 4 5 2 Moving the SUN2000 42 4 5 3 Install...

Page 6: ...ion 80 6 1 Powering On the SUN2000 80 6 2 Powering Off the SUN2000 80 7 Man Machine Interactions 82 7 1 Operations with a USB Flash Drive 82 7 1 1 Exporting Configurations 82 7 1 2 Importing Configurations 84 7 1 3 Exporting Data 85 7 1 4 Upgrading 86 7 2 Operations with a SmartLogger 87 7 3 Operations with the NMS 87 7 4 Operations with the SUN2000 APP 87 8 Maintenance 88 8 1 Routine Maintenance ...

Page 7: ...ower system and they should be familiar with relevant local standards Label Protection Do not tamper with any warning signs on the SUN2000 enclosure because these signs contain important information about safe operation Do not remove or damage the nameplate on the SUN2000 enclosure because it contains important product information Do not remove the warranty label from the SUN2000 enclosure Otherwi...

Page 8: ...shock or fire may occur Shield the PV modules with opaque cloth before connecting cables to the SUN2000 Ensure that all electrical connections comply with local electrical standards Obtain approval from the local power supply department before using the SUN2000 to generate electricity in grid tied mode Ensure that the cables to the solar power system are properly connected and insulated and meet s...

Page 9: ...echnologies Co Ltd 3 Rectify any faults that may compromise the SUN2000 security performance before restarting the SUN2000 Maintain the SUN2000 with sufficient knowledge of this document and proper tools and testing equipment Observe ESD precautions during maintenance For personal safety wear insulation gloves and protective shoes ...

Page 10: ...000 is a three phase grid tied PV string inverter that converts the DC power generated by PV strings into AC power and feeds the power into the power grid Models Figure 2 1 shows a model number of the SUN2000 using SUN2000 25KTL US as an example Figure 2 1 Model number description Table 2 1 lists all models of the SUN2000 and their rated output power Table 2 1 SUN2000 models and rated output power...

Page 11: ...ts of PV strings grid tied inverters AC distribution units ACDUs and isolation transformer as shown in Figure 2 2 Figure 2 2 NetworkApplication A PV string B SUN2000 C ACDU D Isolation transformer E Power grid Supported Power Grids Power grid types supported by the SUN2000 include TN S TN C TN C S TT and IT as shown in Figure 2 3 Figure 2 3 Supported Power Grids 2 2 Appearance This section describ...

Page 12: ...3 2017 04 01 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 6 Figure 2 4 Dimensions SUN2000 front view Figure 2 5 shows the SUN2000 front view Figure 2 5 SUN2000 front view 1 Indicators 2 Host panel 3 Maintenance compartment door ...

Page 13: ...he SUN2000 is grid tied Off The SUN2000 is not grid tied Communication indicator Blinking green on for 0 5s and off for 0 5s The SUN2000 receives data over RS485 or PLC communication Off The SUN2000 has not received data over RS485 or PLC communication for 10 seconds Alarm Maintenanc e indicator Alarm state Blinking red slowly on for 1s and then off for 4s The SUN2000 has generated a warning Blink...

Page 14: ...and export using a USB flash drive and maintenance operations on the SUN2000 app installed on a device connected to the SUN2000 by a USB data cable If alarming and local maintenance happen concurrently the alarm maintenance indicator shows the local maintenance state first After the USB flash drive or a USB cable is removed the indicator shows the alarm state Rear View Figure 2 6 shows the SUN2000...

Page 15: ...ix routes 3 Function ground points N A 4 Waterproof cable connector COM1 N A 5 Protection ground points N A 6 AC output port AC OUTPUT N A 7 Waterproof cable connector COM3 Reserved 8 Waterproof cable connector COM2 N A 9 Waterproof cable connector GND Functional ground cable hole 10 USB port USB N A 11 Negative DC input terminal Six routes 12 Vent valve 2 PCS 2 3 Label Conventions Warning Signs W...

Page 16: ... exposed to light it supplies DC voltage to this equipment The DC conductors of this photovoltaic system are ungrounded and may be energized The DC conductors of this photovoltaic system are normally ungrounded but will become intermittently grounded without indication when the SUN2000 measures the PV array isolation Burn Hot surfaces To reduce the risk of burns do not touch heatsink nor the sides...

Page 17: ...S485 communications cable shield layer Operation warning The DC input connector must not be removed when the SUN2000 is in operation Anti demolition Do not open the host panel of the SUN2000 SUN2000 SN label Indicates the SN information Nameplate The SUN2000 is labeled with a nameplate on the side that contains the model information technical specifications and compliance symbols If the SUN2000 on...

Page 18: ...4 01 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 12 Figure 2 8 Nameplate RS485 communication 1 Trademark product name and model number 2 Important technical specifications 3 Compliance symbols 4 Company name and country of manufacture ...

Page 19: ... and model number 2 Important technical specifications 3 Compliance symbols 4 Company name and country of manufacture Table 2 5 describes the compliance symbols Table 2 5 Compliance symbols Symbol Name Meaning American FCC Part 15B certification The SUN2000 complies with FCC Part 15B certification standards American FCC Part 15G certification The SUN2000 complies with FCC Part 15G certification st...

Page 20: ...sposed of as domestic waste For details about how to dispose of the SUN2000 see 9 SUN2000 Handling The certification identification on the nameplate will be subject to the actual product 2 4 Working Process This section describes the SUN2000 working process Circuit Diagrams The SUN2000 receives inputs from six PV strings Then the inputs are grouped into three MPPT circuits inside the SUN2000 to tr...

Page 21: ... Confidential Copyright Huawei Technologies Co Ltd 15 Figure 2 10 SUN2000 output conceptual diagram Working Modes Figure 2 11 shows the conditions for the SUN2000 to switch between working modes Figure 2 11 Working mode description Table 2 6 describes the working modes shown in Figure 2 11 ...

Page 22: ...if it detects a shutdown command or a fault Operating In operating mode The SUN2000 converts DC power from PV strings into AC power and feeds the power to the power grid The SUN2000 tracks the maximum power point to maximize the PV string output The SUN2000 enters the shutdown mode if detecting a fault or a shutdown command and enters the standby mode if detecting that the PV string output power d...

Page 23: ...N2000 Keep the storage temperature at 40 C to 70 C 40 F to 158 F and the humidity at 5 100 RH The SUN2000 should be stored in a clean and dry place and be protected from dust and water vapor corrosion A maximum of four layers of SUN2000s can be stacked Conduct periodic inspection during storage Replace the packing materials immediately if any rodent bites are found Ensure that qualified personnel ...

Page 24: ... SUN2000 in a place where personnel are likely to come into contact with its enclosure and heat sinks These parts are extremely hot during operation The installation should comply with the local national installation specifications 4 1 Checking Before Installation Checking the Outer Packing Before unpacking the SUN2000 examine the outer packing for damage such as holes and cracks If any such damag...

Page 25: ...acking case 4 2 Tools Prepare tools required for installation and cable connections Tool Model Function Hammer drill Drill bit Φ14 mm 0 55 in and Φ16 mm 0 63 in Drill bit Φ14 mm 0 55 in used for drilling holes in supports Drill bit Φ16 mm 0 63 in used for drilling holes in walls Torque screwdriver Flat head M6 Phillips head M4 and M6 Secures screws Socket wrench Open end 10 mm 0 39 in applicable t...

Page 26: ...s Co Ltd 20 Tool Model Function Diagonal pliers N A Cut cable ties Wire stripper N A Peels off cable jackets Rubber mallet N A Hammers expansion bolts into holes Utility knife N A Removes packages Cable cutter N A Cuts power cables Crimping tool H4TC0001 Manufacturer AMPHENOL Crimps metal terminals when preparing DC input power cables ...

Page 27: ...5 crimping tool N A Prepares RJ45 connectors for communications cables Removal wrench H4TW0001 Manufacturer AMPHENOL Secures the DC input power cable and removes the DC connector from the inverter Vacuum cleaner N A Cleans up dust after drilling holes Multimeter N A Measures cable voltages Marker Diameter 10 mm 0 39 in Marks signs Measuring tape N A Measures distances ...

Page 28: ... the levelness of T shaped mounting brackets ESD gloves N A Protect your hands during installation Safety goggles N A Protect your eyes from dust during hole drilling Anti dust respirator N A Protects you from dust inhalation during hole drilling Hydraulic pliers N A Crimp OT terminals Heat shrink tubing Withstand voltage 600 V Thickness 0 8 mm 0 03 in Insulates electrical devices ...

Page 29: ... 94 in adapted to the vertical distance between terminals and the cabinet frame Wrench handle length horizontal 200 mm 7 87 in Torque 0 8 N m Secures AC output terminals Torque wrench Open end 18 mm 0 71 in Tightens expansion bolts Cable tie N A Binds cables 4 3 Wall mounting the SUN2000 4 3 1 Determining the Installation Position Determine an appropriate position for installing the SUN2000 Basic ...

Page 30: ...alled in a well ventilated environment to ensure good heat dissipation When installed under direct sunlight performance de rate may be initiated due to additional temperature rise Carrier Requirements The carrier where the SUN2000 is installed must be fire proof Do not install the SUN2000 on flammable building materials The wall must be solid enough to bear the weight of the SUN2000 Do not install...

Page 31: ...echnologies Co Ltd 25 Figure 4 2 Incorrect installation modes Installation Space Requirements It is recommended that the SUN2000 be installed at eye level to facilitate operation and maintenance Reserve enough clearance around the SUN2000 to ensure sufficient space for installation and heat dissipation as shown in Figure 4 3 ...

Page 32: ...3 Minimum installation clearance When installing multiple SUN2000s install them along the same line as shown in Figure 4 4 if sufficient space is available and install them in triangle mode as shown in Figure 4 5 or in stacked mode as shown in Figure 4 6 if no sufficient space is available Figure 4 4 Horizontal installation mode if the space is sufficient ...

Page 33: ...00 25KTL 30KTL US User Manual 4 Installation Issue 03 2017 04 01 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 27 Figure 4 5 Triangle installation mode if the space is insufficient ...

Page 34: ...nstallation mode if the space is insufficient The clearance between multiple SUN2000s must be increased to ensure proper heat dissipation when they are installed in a hot area 4 3 2 Moving the SUN2000 Move the SUN2000 to the installation position horizontally Procedure Step 1 Arrange two people to hold the handles on both sides of the SUN2000 as shown in Figure 4 7 ...

Page 35: ...o carry it To prevent device damage and personal injury keep balance when moving the SUN2000 Do not place the SUN2000 with its wiring terminals contacting the floor because the power ports and signal ports at the bottom of the device are not designed to support the weight of the SUN2000 Place the SUN2000 horizontally When placing the SUN2000 on the floor put foam or paper under the SUN2000 to prot...

Page 36: ...anel dimensions Procedure Step 1 Determine the positions for drilling holes as shown in Figure 4 9 using the rear panel available in the packing case level the hole positions using a level and mark the hole positions using a marker Figure 4 9 Determining hole positions Step 2 Drill holes using a hammer drill and install the expansion bolts as shown in Figure 4 11 ...

Page 37: ... holes again Level the top of the expansion sleeve with the concrete wall after removing the bolt spring washer and flat washer Otherwise the rear panel will not be securely installed on the wall 1 Drill a hole in a marked position to a depth of 52 60 mm 2 05 2 36 in using a hammer drill with a Ф16 mm Φ0 63 in bit 2 Partially tighten an expansion bolt vertically insert it into the hole and knock t...

Page 38: ...SUN2000 Procedure Step 1 If the installation position is low and you can mount the SUN2000 on the rear panel go to Step 6 after performing Step 4 Step 2 If the installation position is high and you cannot mount the SUN2000 on the rear panel perform Step 3 to Step 7 Step 3 Mount the M10 screw lifting eyes provided by the customer into the lifting holes and tighten the lifting eyes as shown in Figur...

Page 39: ...d the handle at the bottom of the SUN2000 with one hand and hold the handle near the top of the SUN2000 with the other hand and then stand the SUN2000 as shown in Figure 4 14 To prevent personal injury keep balance when lifting the SUN2000 because it is heavy Figure 4 14 Lifting the SUN2000 Step 5 Route a rope that is able to bear the SUN2000 through the lifting eyes and hoist the SUN2000 as shown...

Page 40: ...nfidential Copyright Huawei Technologies Co Ltd 34 When hoisting the SUN2000 keep balance to protect the SUN2000 from colliding with the wall or other objects Figure 4 15 Hoisting the SUN2000 Step 6 Mount the SUN2000 on the rear panel and keep them aligned with each other as shown in Figure 4 16 ...

Page 41: ... 35 Figure 4 16 Mounting the SUN2000 on the rear panel Step 7 Tighten the two hexagon screws at the bottom of the SUN2000 to a torque of 5 N m as shown in Figure 4 17 Figure 4 17 Tightening hexagon screws Step 8 Optional Install an antitheft lock as shown in Figure 4 18 The antitheft lock secures the SUN2000 to the rear panel to prevent theft ...

Page 42: ...r the weight and dimensions of the SUN2000 For details see 10 Technical Specifications Do not install the SUN2000 in a place where personnel are likely to come into contact with its enclosure and heat sinks because these parts are extremely hot during operation Do not install the SUN2000 in an area that stores flammable or explosive materials Installation Environment Requirements The SUN2000 must ...

Page 43: ...e solid enough to bear the weight of the SUN2000 Installation Mode Requirements Install the SUN2000 upright or at a maximum back tilt of 15 degrees to facilitate heat dissipation Figure 4 19 Correct installation modes Do not install the SUN2000 at an excessive front or back tilt at a side tilt horizontally or upside down Figure 4 20 Incorrect installation modes ...

Page 44: ...tion and maintenance Reserve enough clearance around the SUN2000 to ensure sufficient space for installation and heat dissipation as shown in Figure 4 21 Figure 4 21 Minimum installation clearance 4 4 2 Moving the SUN2000 For details about how to move an inverter see 4 3 2 Moving the SUN2000 4 4 3 Installing a Rear Panel Before installing the SUN2000 secure the shipped rear panel to a support Prer...

Page 45: ...ure 4 22 Rear panel dimensions Procedure Step 1 Determine the positions for drilling holes as shown in Figure 4 23 using the rear panel available in the packing case level the hole positions using a level and mark the hole positions using a marker Figure 4 23 Determining hole positions Step 2 Drill holes using a hammer drill as shown in Figure 4 24 ...

Page 46: ...ositions insert the screw assembly flat washer spring washer and M12x40 bolts into the holes through the rear panel secure them using the shipped stainless steel nuts and flat washers and tighten the bolts to a torque of 45 N m using a torque wrench as shown in Figure 4 25 Figure 4 25 Securing a rear panel End 4 4 4 Installing the SUN2000 For details about how to install an inverter see 4 3 4 Inst...

Page 47: ... its enclosure and heat sinks because these parts are extremely hot during operation Do not install the SUN2000 in an area that stores flammable or explosive materials Installation Environment Requirements The SUN2000 must be installed in a well ventilated environment to ensure good heat dissipation When installed under direct sunlight performance de rate may be initiated due to additional tempera...

Page 48: ...tion Space Requirements It is recommended that the SUN2000 be installed at eye level to facilitate operation and maintenance Reserve enough clearance around the SUN2000 to ensure sufficient space for installation and heat dissipation as shown in Figure 4 28 Figure 4 28 Minimum installation clearance 4 5 2 Moving the SUN2000 For details about how to move an inverter see 4 3 2 Moving the SUN2000 ...

Page 49: ...e bottom auxiliary tightening point in the top view are OB 13 mm x 8 mm OB 0 51 in x 0 31 in The hole dimensions of the tightening point for the tilted support mounting kit in the front view are OB 32 mm X 12 mm OB 1 26 in x 0 47 in The auxiliary tightening point is 5 mm 0 20 in away from the lower tightening point for the tilted support mounting kit Step 2 Secure the tilted support mounting kit t...

Page 50: ... If the installation position is low and you can mount the inverter on the tilted support perform Step 6 and then go to Step 8 Step 4 If the installation position is high and you cannot mount the inverter on the tilted support perform Step 5 to Step 9 Step 5 Mount the M10 screw lifting eyes provided by the customer into the lifting holes and tighten the lifting eyes as shown in Figure 4 31 ...

Page 51: ...d the handle at the bottom of the SUN2000 with one hand and hold the handle near the top of the SUN2000 with the other hand and then stand the SUN2000 as shown in Figure 4 32 To prevent personal injury keep balance when lifting the SUN2000 because it is heavy Figure 4 32 Lifting the SUN2000 Step 7 Route a rope that is able to bear the SUN2000 through the lifting eyes and hoist the SUN2000 as shown...

Page 52: ...hoisting the SUN2000 keep balance to protect the SUN2000 from colliding with the wall or other objects Figure 4 33 Hoisting the SUN2000 Step 8 Align the screw holes on the tilted support mounting kit with the marked holes on the tilted support and secure the inverter to the tilted support using M8x30 screws to a torque of 8 N m as shown in Figure 4 34 ...

Page 53: ...on a tilted support Step 9 Optional Tighten the screws at the bottom auxiliary tightening points to a torque of 4 N m as shown in Figure 4 35 Figure 4 35 Tightening screws at the bottom auxiliary tightening points Step 10 Optional Install an antitheft lock as shown in Figure 4 36 The function of an antitheft lock is to secure the SUN2000 to the support and protect it from stealing ...

Page 54: ...SUN2000 25KTL 30KTL US User Manual 4 Installation Issue 03 2017 04 01 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 48 Figure 4 36 Installing an antitheft lock End ...

Page 55: ... are for reference only Select cables in accordance with local cable specifications yellow green wires are only used for grounding 5 1 Common Cable Connection Operations External cables can connect to the SUN2000 in common mode or through a pipe Connect ion Method Procedure Common Connecti on 1 Remove the locking cap from the waterproof cable connector waterproof connector for short at the bottom ...

Page 56: ... cable 4 Check that the cable is connected correctly and securely and then secure the pipe and seal the cable hole with firestop putty 5 2 Opening the Maintenance Compartment Door Prerequisites Do not open the host panel of the inverter Before opening the maintenance compartment door switch off the upstream DC input circuit breaker and downstream AC output circuit breaker Do not leave unused screw...

Page 57: ...1 Removing screws If the two screws on the maintenance compartment door are lost use the standby M6 hexagon screw assemblies available in the fitting bag that is bound to the chassis base Step 2 Open the door and adjust a support bar as shown in Figure 5 2 Figure 5 2 Adjusting a support bar Step 3 Remove the AC terminal cover and set it aside as shown in Figure 5 3 ...

Page 58: ...3 2017 04 01 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 52 Figure 5 3 Removing the AC terminal cover To highlight the involved area the figures do not show the open door End 5 3 Connecting the Ground Cable Context Figure 5 4 Ground points ...

Page 59: ...nections The following describes how to connect ground cables to ground points 1 and 4 Ground cables can be connected to ground points 1 and 4 in the common way or through a pipe For details about how to handle the bottom waterproof connectors in these two methods see 5 1 Common Cable Connection Operations Prerequisites The ground cables and OT terminals are prepared Connecti on Method Recommended...

Page 60: ...imping a cable The cavity formed after the conductor crimp strip is crimped must wrap the core wires completely The core wires must contact the terminal closely Step 2 Route the prepared cable through the GND and AC OUTPUT cable holes and tighten the screw using a torque screwdriver If cables are routed through a pipe you can secure the pipe after connecting the ground cable to ground point 4 and ...

Page 61: ...connection End 5 4 Connecting AC Output Power Cables Connect the SUN2000 to the AC power distribution cabinet PDC or power grid over AC output power cables Connect AC output power cables according to the requirements specified by local power grid operators AC power cables can be connected in the common way or through a pipe For details about how to handle the bottom waterproof connectors in these ...

Page 62: ...o d Cable Type Wire Quantity Cable Specific ations Cable Outer Diameter Connec tion through a pipe A single cable Four L1 L2 L3 and N or three L1 L2 and L3 NOTE The PE cable can connect to the chassis interior For the detailed connection method see 5 3 Connecting the Ground Cable 8 2 AWG 6 3 12 1 mm 0 25 0 48 in Comm on connect ion Three core four core or five core cable If the PE cable connects t...

Page 63: ... a pipe by yourself The recommended pipe outer diameter is 42 47 mm 1 67 in Procedure Through a Pipe Step 1 Route the cables through the pipe and AC OUTPUT hole Step 2 Prepare OT terminals Figure 5 9 Stripping anAC output power cable Wrap the wire crimping area with heat shrink tubing or PVC insulation tape If heat shrink tubing is used wrap the cable with the heat shrink tubing and then crimp the...

Page 64: ...s AC output terminals must be parallel When installing the AC output power cable the torque must not exceed 6 N m Otherwise the AC terminal block may be damaged Ensure that the AC output power cable is securely connected Otherwise the SUN2000 may fail to operate or the terminal block may be damaged after the SUN2000 operates Figure 5 10 ConnectingAC output power cables 1 Neutral wire not connected...

Page 65: ...cable L1 L2 and L3 2 Four core cable L1 L2 L3 and N 3 Four core cable L1 L2 L3 and PE 4 Five core cable L1 L2 L3 N and PE Wrap the wire crimping area with heat shrink tubing or PVC insulation tape If heat shrink tubing is used wrap the cable with the heat shrink tubing and then crimp the OT terminal Step 3 Connect the SUN2000 AC output power cable to the AC terminal block and secure the cable to a...

Page 66: ...nal regulations and installation specifications AC output terminals must be parallel When installing the AC output power cable the torque must not exceed 6 N m Otherwise the AC terminal block may be damaged Ensure that the AC output power cable is securely connected Otherwise the SUN2000 may fail to operate or the terminal block may be damaged after the SUN2000 operates Figure 5 12 ConnectingAC ou...

Page 67: ...DC side is within the safe range lower than 60 V DC and that the DC SWITCH on the SUN2000 is OFF Otherwise high voltage may result in electric shock When the SUN2000 is grid tied do not maintain DC input power cables such as connecting or disconnecting a PV string or a PV module in a PV string Otherwise it may result in electric shocks To avoid fire ensure that the following conditions are met The...

Page 68: ...requirements if they need to be grounded Connect a three phase isolation transformer on the SUN2000 output side and ensure that the neutral wire of the isolation transformer is separated from the ground cable One isolation transformer must be installed only for one SUN2000 Do not connect two or more SUN2000s to the same isolation transformer Otherwise the SUN2000s may fail to work due to the loop ...

Page 69: ...cifications Cable Type Cable Specifications Cable Outer Diameter Range Recommende d Value Range Recommende d Value Common PV cable 10 12 AWG 12 AWG 4 5 7 8 mm 0 18 0 31 in 4 5 mm 0 18 in Highly rigid cables such as armored cables are not recommended because bending may cause poor contact Positive and negative connectors Positive and negative DC input connectors are used as shown in Figure 5 14 and...

Page 70: ...nsulation layer from the positive and negative power cables using a wire stripper as shown in Figure 5 16 Figure 5 16 Stripped length Step 2 Insert the exposed area of the positive and negative power cables into the metal terminals of the positive and negative connectors respectively and crimp them using a crimping tool as shown in Figure 5 17 Ensure that the cables are crimped tightly such that t...

Page 71: ...ve and negative connectors until a click sound is heard Figure 5 18 Inserting positive and negative connectors After inserting the crimped positive and negative power cables into the corresponding insulation housings ensure that the cables are in position by checking for resistance when a slight pull is applied Step 4 Tighten the locking nuts on the positive and negative connectors Secure the nuts...

Page 72: ...logies Co Ltd 66 Figure 5 19 Locking a nut Step 5 Pull out the blue dustproof plugs from the ends of the DC input connectors Step 6 Ensure that the DC input voltage of each PV string does not exceed 1000 V DC using a multimeter and check that the polarities of the DC input power cables are correct Figure 5 20 Measuring the DC input voltage ...

Page 73: ...n or equal to 0 8 mm 0 03 in and the DC input power cables cannot be pulled out If the DC input power cable is reversely connected and the DC switch is ON do not turn off the DC switch immediately Otherwise the SUN2000 may be damaged The damage caused by reverse connection of the DC input power cable is beyond the warranty scope Wait until the PV string voltage reduces to the safe range Then turn ...

Page 74: ...the SmartLogger to implement RS485 communication You can use the SmartLogger LCD embedded WebUI or the network management software such as the NetEco on the PC to query information about the SUN2000 such as electric energy yield alarms and running status Figure 5 23 shows the communication mode for a single SUN2000 Figure 5 23 Communication mode for a single SUN2000 Figure 5 24 shows the communica...

Page 75: ...s onto power cables for transmission For details about how to install the PLC module see the PLC CCO01A User Manual or SmartLogger2000 User Manual The built in PLC module in the SUN2000 does not need to be connected with cables 5 6 2 Selecting a Communication Mode The RS485 and PLC communication modes are mutually exclusive If PLC is used do not connect the RS485 communications cable If RS485 is u...

Page 76: ...communications cable with a conductor cross sectional area of 1 mm2 or 18 AWG and an outer diameter of 14 18 mm 0 55 0 71 in OT terminal M4 Connection through a pipe RJ45 network port RS485 communications cable You are advised to use a CAT 5E outdoor shielded network cable with an outer diameter less than 9 mm 0 35 in and an internal resistance not greater than 1 5 ohm 10 m 1 5 ohm 393 70 in RJ45 ...

Page 77: ...DI Dry contact input Left blank 3 N A N A 4 N A N A RS485 communications port input 5 RS 485A IN RS485A RS485 differential signal 7 RS 485B IN RS485B RS485 differential signal RS485 communications port output 6 RS 485A OUT RS485A RS485 differential signal 8 RS 485B OUT RS485B RS485 differential signal Reserved RS485 communications port 9 RS485A SVG RS485A RS485 differential signal 10 RS485B SVG RS...

Page 78: ...RS485B RS485 differential signal 3 NC 4 RS485A RS485 differential signal 5 RS485B RS485 differential signal 6 NC 7 NC 8 NC Procedure Method 1 Connecting to a terminal block recommended a Prepare the cable Figure 5 27 Stripping an RS485 communications cable b Route the cable through the COM1 and COM2 holes at the bottom Connect the input end to ports 5 and 7 on the terminal block the output end to ...

Page 79: ...ologies Co Ltd 73 Figure 5 28 Connecting RS485 communications cables through a pipe Figure 5 29 Connecting RS485 communications cables common mode c Bind communications cables after connecting them Cable ties are bound at the same positions irrespective of whether the communications cables are connected in a common way or through a cable ...

Page 80: ...yright Huawei Technologies Co Ltd 74 Figure 5 30 Binding communications cables If multiple SUN2000s are connected over RS485 communications cables connect them in the way shown in Figure 5 31 Figure 5 31 Multiple SUN2000s connecting to the RS485 communications cable Method 2 Connecting to RJ45 ports a Prepare the cable ...

Page 81: ... and Confidential Copyright Huawei Technologies Co Ltd 75 Figure 5 32 Connecting wires to an RJ45 connector b Route the cable through the COM1 hole at the bottom then to the RS485 IN and RS485 OUT ports in the maintenance compartment Figure 5 33 Connecting RS485 communications cables through a pipe ...

Page 82: ...Figure 5 34 Connecting RS485 communications cables common mode Block unused COM2 waterproof cable connectors with plugs c Bind communications cables after connecting them Cable ties are bound at the same positions irrespective of whether the communications cables are connected in a common way or through a cable Figure 5 35 Binding communications cables End ...

Page 83: ...l AC output power cables are connected correctly without open circuits or short circuits 6 The DC input voltage is less than or equal to 1000 V and in the local voltage range 7 All DC input power cables are connected correctly without open circuits or short circuits 8 All RS485 communications cables are connected correctly without open circuits or short circuits 9 Idle DC input terminals are seale...

Page 84: ... Huawei Technologies Co Ltd 78 Figure 5 36 Installing theAC terminal cover Step 2 Adjust the support bar as shown in Figure 5 37 Figure 5 37 Adjusting a support bar Step 3 Close the maintenance compartment door and tighten the two screws on the maintenance compartment door as shown in Figure 5 38 The required torque is 4 N m ...

Page 85: ...y and Confidential Copyright Huawei Technologies Co Ltd 79 Figure 5 38 Tightening screws on the maintenance compartment door If the two screws on the maintenance compartment door are lost use the standby M6 hexagon screw assemblies available in the fitting bag that is bound to the chassis base End ...

Page 86: ...is 1 minute You can modify the time over the network management software running on a PC connected to the SUN2000 Step 2 Press DC SWITCH at the bottom of the inverter and rotate it to the ON position Step 3 Optional To check whether the DC terminal is securely connected after the SUN2000 works for some time measure the temperature at the DC terminal connection point using a point test thermometer ...

Page 87: ...edure Step 1 Run a shutdown command on the SUN2000 app SmartLogger or NMS For details see the SUN2000 APP User Manual SmartLogger1000 User Manual SmartLogger2000 User Manual or iManager NetEco 1000S User Manual Step 2 Switch off the circuit breaker between the SUN2000 and the power grid Step 3 Set the DC SWITCH to OFF Step 4 Optional Lock the DC switch using a padlock as shown in Figure 6 1 If DC ...

Page 88: ...ve USB flash drives of SanDisk Netac and Kingston are recommended Other brands may be incompatible 7 1 1 Exporting Configurations Procedure Step 1 On the SUN2000 APP tap Inverter Command Settings to generate a boot script file For details see the SUN2000 APP User Manual Step 2 Import the boot script file to a PC Optional The boot script file can be opened as a txt file as shown in Figure 7 1 Figur...

Page 89: ...SB flash drive to the USB port The system automatically identifies the USB flash drive and executes all commands specified in the boot script file View the LED indicator to determine the operating status Verify that the ciphertext in the boot script file matches the login password of the SUN2000 APP If they do not match and you insert the USB flash drive for five consecutive times the user account...

Page 90: ...mported one Replace the boot script file only and keep the exported files Step 4 Connect the USB flash drive to the USB port The system automatically identifies the USB flash drive and executes all commands specified in the boot script file View the LED indicator to determine the operating status Verify that the ciphertext in the boot script file matches the login password of the SUN2000 APP If th...

Page 91: ...D indicator to determine the operating status Verify that the ciphertext in the boot script file matches the login password of the SUN2000 APP If they do not match and you insert the USB flash drive for five consecutive times the user account will be locked for 10 minutes Table 7 3 LED indicator description LED Indicator Status Meaning Green off There is no operation with a USB flash drive Blinkin...

Page 92: ... the login password of the SUN2000 APP is the initial password 00000a there is no need to perform Step 3 Step 5 When the login password of the SUN2000 APP is not the initial password perform Step 3 Step 7 Step 3 On the SUN2000 APP tap Inverter Command Settings to generate a boot script file For details see the SUN2000 APP User Manual Step 4 Import the boot script file to a computer Step 5 Replace ...

Page 93: ... 8 Optional The system automatically restarts when the upgrade is completed All LED indicators turn off during the restart After the restart the green indicator is blinking at long intervals on for 1s and then off for 1s for 1 minute until it becomes steady on which indicates that the upgrade is successful The SUN2000 can also be upgraded through the Inverter Upgrade in the SUN2000 APP For details...

Page 94: ...maintenance compartment If it is impossible to take protective measures do not open the maintenance compartment door in rainy or snowy days Table 8 1 Maintenance checklist Check Item Check Method Maintenance Interval System cleaning Check periodically that the heat sinks are free from obstacles or dust Semiannually to annually System running status Check that the SUN2000 is not damaged or deformed...

Page 95: ...it at least 5 minutes after the SUN2000 is powered off If DC SWITCH is switch to OFF on the DC side it is recommended that you lock the DC switch to avoid switching it on by mistake 8 2 Troubleshooting This section describes the troubleshooting measures for common fault alarms in the SUN2000 The alarm severity is defined as follows Major The SUN2000 enters the shutdown mode and stops feeding elect...

Page 96: ... PV modules connected in series to PV strings 1 and 2 until the open circuit voltage is less than or equal to the maximum inverter input voltage After the PV array configuration is corrected the alarm disappears Cause ID 2 Reduce the number of PV modules connected in series to PV strings 3 and 4 until the open circuit voltage is less than or equal to the maximum inverter input voltage After the PV...

Page 97: ...0 DC Bus Voltage Fault Major Abnormal external conditions trigger the protection for the DC circuit inside the SUN2000 The possible causes are as follows Reason ID 3 The SUN2000 input is suddenly disconnected or the PV strings shielded result in a sharp change in output power Reason ID 10 The internal control circuit of the SUN2000 has failed to keep pace with changes due to grid phase imbalance C...

Page 98: ...eason ID 20 1 Check whether the SUN2000 output cables are short circuited Rectify any fault 2 If the alarm persists contact Huawei technical support 301 Grid Voltage Abnormal Major The voltage of the power grid is beyond the acceptable range The possible causes are as follows Cause ID 4 The power grid voltage is below the specified lower threshold Cause ID 16 The power grid voltage is below the sp...

Page 99: ...rator 2 If the grid tie point voltage is higher than the allowable range change the overvoltage and undervoltage protection points after obtaining approval from the local power operator 3 Check whether the grid voltage peak is too high Cause ID 28 1 The SUN2000 monitors its external working conditions in real time and automatically recovers to the normal operating status after the fault is rectifi...

Page 100: ...range If no contact the local power operator If yes obtain written permission from the local power operator and log in to the SUN2000 app SmartLogger or NMS to change the power grid overfrequency and underfrequency protection thresholds Cause ID 5 If the alarm occurs accidentally possibly the power grid is abnormal accidentally The SUN2000 automatically recovers to the normal operating status afte...

Page 101: ... position If the ventilation is poor or the ambient temperature exceeds the upper threshold improve the ventilation and heat dissipation If the ventilation and ambient temperature both meet requirements contact Huawei technical support 322 Abnormal SPI Communi cation Major Cause ID 1 An unrecoverable fault has occurred on a circuit inside the SUN2000 Turn off the AC output switch and DC input swit...

Page 102: ... the fault persists contact Huawei technical support 2 Disable AFCI on the SUN2000 app SmartLogger or NMS if you are sure not to use it 412 DC Arc Fault Major Cause ID 1 2 3 PV cables are in poor contact or short circuited causing electric arcs Check whether the string cables are in an open circuit or in poor contact 504 Version Mismatch Minor Cause ID 1 2 3 During SUN2000 software upgrade the ver...

Page 103: ...tom of the SUN2000 4 Remove the SUN2000 from the rear panel 5 Remove the rear panel Installed on a Tilted Support Perform the following operations to remove the SUN2000 1 Power off the SUN2000 For details see 6 2 Powering Off the SUN2000 2 Disconnect all cables from the SUN2000 including RS485 communications cables DC input power cables AC output power cables PGND cables and PV side ground cables ...

Page 104: ...ies Co Ltd 98 If the original packing case is unavailable place the SUN2000 inside a suitable hard carton and seal it properly 9 3 SUN2000 Disposal This section describes how to dispose of the SUN2000 If the SUN2000 service life has expired dispose of the SUN2000 in accordance with local rules for disposal of electrical equipment waste ...

Page 105: ... 6 CEC efficiency 98 0 Input Technical Specifications SUN2000 25KTL US SUN2000 30KTL US Maximum input power cosφ 1 25 800 W 30 800 W Maximum input voltage 1 000 V Minimum operating voltage 200 V MPP voltage range 250 V DC to 950 V DC Range of MPPT input operating voltage with full power 560 V DC to 850 V DC Rated input voltage 730 V Minimum starting voltage 250 V Maximum short circuit current DC 9...

Page 106: ...t power 25 kW 27 5 kVA 30 kW 33 kVA Output power factor rating 0 99 adj 0 8 Operating voltage range AC L L 422 V AC to 528 V AC Number of Phases 3 Ø Operating frequency range or single frequency 59 3 Hz to 60 5 Hz Maximum output fault current AC and duration 185 6Apk 76 4 ms 37 56Arms 1 cycle 39 68Arms 3 cycles Maximum output overcurrent protection AC 125 A Utility interconnection voltage and freq...

Page 107: ...ction Yes Input reverse connection protection Yes PV string fault detection Yes DC surge protection Category C AC surge protection Category C Insulation resistance detection Yes Residual current detection Yes AFCI Yes Display and Communication Technical Specifications SUN2000 25KTL US SUN2000 30KTL US RS485 Yes USB Yes General Data Technical Specifications SUN2000 25KTL US SUN2000 30KTL US Dimensi...

Page 108: ...humidity non condensing 0 100 DC connector Amphenol HH4 AC connector Screw Terminal Protection level Type 4X Protective class Class I Self consumption at night 1 Wa Topology Transformerless a RS485 communication mode Standards Compliance Technical Specifications SUN2000 25KTL US SUN2000 30KTL US Safety EMC UL 1741 UL 1699B IEEE 1547 CSA C22 2 107 1 01 and FCC Part 15 Grid code IEEE 1547 and IEEE 1...

Page 109: ...ion Duration s Voltage V Frequency D 120 V V Rated 60 Hz 0 16 E Rated 60 5 Hz 0 16 F Rated 59 3 Hz 0 16 Operating power envelope as a function of ambient temperature Model MPPT Input 25 C 13 F 45 C 113 F 53 C 127 4 F 60 C 140 F SUN2000 2 5KTL US 560 V DC 25 kW 25 kW 24 1 kW 21 5 kW 850 V DC 25 kW 25 kW 25 3 kW 21 1 kW SUN2000 3 0KTL US 560 V DC 30 kW 30 kW 24 7 kW 21 9 kW 850 V DC 30 kW 30 kW 25 4...

Page 110: ...tion 1 IEEE 1547 MV480 US medium voltage power grid 2 IEEE 1547a MV480 2016 US medium voltage power grid 3 PRC_024_ERCOT MV480 Texas medium voltage power grid 4 PRC_024_Eastern MV480 Eastern US medium voltage power grid 5 PRC_024_Western MV480 Western US medium voltage power grid 6 PRC_024_Quebec MV480 Quebec medium voltage power grid 7 ELEC RULE NO 21 MV480 California medium voltage power grid 8 ...

Page 111: ... current ACDU alternating current distribution unit AFCI arc fault circuit interrupter APP application C CAT category CEC California Energy Commission CSA Canadian Standards Association D DC direct current DI digital input E EFUP environmentally friendly use period EMC electromagnetic compatibility EMI electromagnetic interference ESD electrostatic discharge ESN equipment serial number EU European...

Page 112: ...ication G GND ground I ID identification IEEE Institute of Electrical and Electronics Engineers L LCD Maximum Power Point LED light emitting diode M MPP maximum power point MPPT maximum power point tracking N NC normally closed NetEco network ecosystem NMS network management system P PC personal computer PDF Power distribution frame PE protective earthing PGND protection ground PV photovoltaic PVC...

Page 113: ... US User Manual B Acronyms and Abbreviations Issue 03 2017 04 01 Huawei Proprietary and Confidential Copyright Huawei Technologies Co Ltd 107 UL Underwriters Laboratory USB universal serial bus W WebUI web user interface ...

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