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Summary of Contents for Sungrow SG3300UD-MV
- Page 1 User Manual Transformer Replacement Instructions SG3300UD-MV / SG4400UD-MV SG3300UD-MV / SG4400UD-MVTransformer Replacement InstructionsUser ManualSG3300_4400UD-MV Transformer Replacement Instructions-UEN-Ver11-20408 SG3300_4400UD-MV Transformer Replacement Instructions-UEN-Ver11-20408...
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Page 3: Table Of Contents
Contents 1 About This Manual ...................1 1.1 Validity......................1 1.2 How to Use This Manual .................1 1.3 Symbol Explanations ..................1 2 Remove Transformer ..................3 2.1 Precautions....................3 2.2 Preparation ....................3 2.2.1 Remove Container Beams and Mesh Door ..........3 2.2.2 Remove Inverter Unit Near the Transformer (SG4400UD-MV Only)....................4 2.2.2.1 Remove DC Side Cables..............4 2.2.2.2 Remove AC Side Cables..............5... -
Page 5: About This Manual
All rights reserved including the pictures, markings, and symbols used. Any reproduction or disclosure, even partially, of the contents of this document is strictly forbidden without prior written authorization of SUNGROW. Symbol Explanations To ensure the safety of the users and their properties when they use the product and to make sure that the product is used optimally and efficiently, this manual provides users with the relevant safety information which is marked by the following symbols. - Page 6 1 About This Manual User Manual CAUTION indicates a slightly hazardous situation which, if not avoided, may result in minor or moderate injury. NOTICE indicates potential risks that, if not avoided, may lead to device malfunctions or financial losses. NOTE indicates additional information, emphasized contents or tips to help you solve problems or save time.
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Page 7: Remove Transformer
Remove Transformer If the transformer needs to be replaced during the operation of the system, you may remove it by following the instructions specified in this section. Precautions • Before removing or installing the transformer, power off the entire equipment first. -
Page 8: Remove Inverter Unit Near The Transformer (Sg4400Ud-Mv Only)
2 Remove Transformer User Manual 2.2.2 Remove Inverter Unit Near the Transformer (SG4400UD-MV Only) For the SG4400UD-MV inverter, to remove the transformer, move away the inverter unit next to it first. 2.2.2.1 Remove DC Side Cables • After the whole system is powered off, wait at least 20 minutes and verify that no voltage is present inside the whole system before proceeding with the main- tenance work. -
Page 9: Remove Ac Side Cables
User Manual 2 Remove Transformer Step 3 Unscrew the M5 bolt assembly and remove the DC junction box and the screw of the ground- ing cable. Reserve the junction box on the base to facilitate subsequent installation. - - End 2.2.2.2 Remove AC Side Cables After the whole system is powered off, wait at least 20 minutes and verify that no voltage is present inside the whole system before proceeding with the mainte-... - Page 10 2 Remove Transformer User Manual Step 2 Unscrew the M10 bolt assembly and remove the AC wiring copper bar from front to back. Step 3 Tear off all silicone pads marked in the figure below, then unscrew the M5 flange nut, and re- move the AC epoxy plate, the PC plate, and the hose of cables between inverter units.
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Page 11: Remove Connections Between Inverter Units
User Manual 2 Remove Transformer Step 4 Disconnect the cables between inverter units (unit-connecting cable) and cables of the self- constructed grid (optional). Take insulation measures for the unit-connecting cable and put them into the bottom junction box. The components shown in the figure are for reference only. The product you have received may differ. - Page 12 2 Remove Transformer User Manual Step 5 Unscrew the M10 hexagon bolt assembly, remove the connecting piece on the top of the in- verter unit to be replaced and then install the lifting auxiliary part with the M10 hexagon bolt assembly.
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Page 13: Remove Lv Side Soft Connection Cover
User Manual 2 Remove Transformer Step 7 After the inverter unit is hoisted out of the cabinet, properly arrange the cables between units, insulated the exposed wire harness, and keep away from live parts. Step 8 If a new inverter unit cannot be installed immediately, please use the M5 cross recessed hex- agon bolt assembly to tighten the interface protection cover on the flat plate. -
Page 14: Remove Lv Side Copper Braided Wires
2 Remove Transformer User Manual Step 2 Remove the cover plate at the connection point between the inverter and the transformer. Then, remove the LV connection cover. - - End Remove LV Side Copper Braided Wires Step 1 Remove the M6 bolts that secure the canvas shield to the junction box. Please note that there are 2 bolts inside the junction box.. -
Page 15: Remove Cables Inside The Transformer
User Manual 2 Remove Transformer Step 4 Remove all bolts on the LV copper bars. - - End Remove Cables Inside the Transformer Step 1 Remove the three-phase cable and grounding cable that connect the RMU and the transformer. -
Page 16: Lift The Transformer
2 Remove Transformer User Manual Step 2 Disconnect all cables, including the communication cables, between the transformer and the power distribution cabinet and communication box. Do not leave any removed cable inside the transformer room. - - End Please take good care of all cables. Lift the Transformer •... -
Page 17: Install Transformer
Install Transformer After the old transformer is removed, install a new one by following the steps specified in this section. Install the Transformer Step 1 Lift the transformer up with a crane by the four hoisting points at the top of the transformer and put it into the container. -
Page 18: Connect Cables Inside The Transformer
3 Install Transformer User Manual Connect Cables Inside the Transformer Step 1 Connect the three-phase cable and grounding cable to the RMU. Step 2 Connect all the cables, including the communication cables, between the transformer and the power distribution cabinet and communication box. - - End Connect LV Side Copper Braided Wires Step 1 Connect the copper braided wires to the LV copper bars. -
Page 19: Install Lv Side Soft Connection Cover
User Manual 3 Install Transformer Step 4 Install the M6 bolts that secure the canvas shield to the junction box. - - End Install LV Side Soft Connection Cover Step 1 Mount the cover plate at the connection point between the inverter and transformer. -
Page 20: Install Inverter Unit Near The Transformer
3 Install Transformer User Manual Step 2 Mount the transformer's air baffle plate. - - End Install Inverter Unit Near the Transformer Install the inverter unit by reversing the removal steps outlined in "2.2.2 Remove Inverter Unit Near the Transformer (SG4400UD-MV Only)". - Page 21 User Manual 3 Install Transformer Step 2 Secure the top beam using M12 bolt assemblies. - - End...
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Page 22: Tightening Torques
Tightening Torques To avoid poor contact caused by the loosening of copper cable lugs due to stress, and to prevent heat or even fire due to increased contact resistance, make sure to tighten the screws on the cable lugs at the recommended torques: Screw Torque (N.m) Screw...
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