Goodwe GW7000K-MVS User Manual
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Goodwe GW7000K-MVS User Manual

Goodwe GW7000K-MVS User Manual

Smart transformer station
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GW3500-7000K MVS Smart Transformer Station
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  • Page 1 GW3500-7000K MVS Smart Transformer Station User Manual...

  • Page 2: Table Of Contents

    User Manual V1.0-2024-6-5 Content 1. About This Document ..............5 1.1. Intended Audience ..............5 1.2. Manual Description ..............5 1.3. Safety Precautions ..............7 1.3.1. General Safety Rules ..............7 1.3.2. Electrical Safety ................8 1.3.3. Mechanical Safety ................9 1.3.4.
  • Page 3 User Manual V1.0-2024-6-5 4.2.2. Insulation Test ................. 48 4.2.3. Device testing inside the MVS ............. 50 4.2.4. Hot Commission Default Setting ..........53 4.3. Hot Commissioning ..............54 4.3.1. Pre-hot Commissioning Inspection Program ......55 4.3.2. UPS Circuit Power-On ..............58 4.3.3.
  • Page 4 User Manual V1.0-2024-6-5 6. Technical Parameters ............... 90 7. Appendix ..................92...

  • Page 5: About This Document

    User Manual V1.0-2024-6-5 1. About This Document 1.1. Intended Audience This manual is intended for maintenance personnel. It's applicable to personnel who transport, install and operate this product. They should at least meet the following requirements:  Have certain expertise in electronics, electrical wiring and machinery, be familiar with electrical and mechanical schematics diagrams.
  • Page 6 User Manual V1.0-2024-6-5 The symbols that may be found in this manual are defined as follows: DANGER Indicates a high-level hazard that, if not avoided, will result in death or serious injury. WARNING Indicates a medium-level hazard that, if not avoided, could result in death or serious injury.

  • Page 7: Safety Precautions

    User Manual V1.0-2024-6-5 1.3. Safety Precautions The safety instructions in this manual must be strictly followed at all times. In order to avoid possible casualties and property losses during installation or operation, and to extend the service life of the MVS, please be sure to read all safety instructions.

  • Page 8: Electrical Safety

    User Manual V1.0-2024-6-5 NOTICE  Place eye-catching warning signs at the front and the rear of the MVS and at the switch to avoid accidents caused by wrong closing.  Set up warning signs or safety tapes near the field operation area. ...

  • Page 9: Mechanical Safety

    If you want to perform arc welding, cutting and other operations on the equipment, or install other equipment on the top of the equipment, please contact GoodWe first. Prohibit the use of tools with scars, expiration dates, and inspection failures, and ensure that the tools are not overloaded.

  • Page 10: Environment Requirement

    User Manual V1.0-2024-6-5 components and cables of the equipment, and the generated metal chips entering the equipment can cause circuit board short circuits. For handling heavy objects, please comply with relevant safety regulations and work safely after training. 1.3.4. Environment Requirement ...

  • Page 11: Storage Requirement

    User Manual V1.0-2024-6-5  For road transport, a road survey must be conducted in advance to identify obstacles on the route to ensure that vehicles can pass through the route; for water transport, it is necessary to ensure that the route meet the full load navigation of the ships.

  • Page 12: Product Introduction

    User Manual V1.0-2024-6-5 2. Product Introduction NOTICE The figures displayed in this manual are for reference only, please refer to the actual product for details. 2.1. Product Overview 2.1.1. Function A Medium Voltage Substation (MVS) converts low-voltage (LV) AC power generated by solar inverters into medium-voltage (MV) AC power and feeds it into a power grid.

  • Page 13: Appearance

    User Manual V1.0-2024-6-5 2.1.2. Appearance 2.1.2.1. MVS rated power ≤ 3500kVA Figure 2-2 Appearance Figure 2-3 Component 1 LV(Low voltage) room 1.1 D1 Cabinet 2 Transformer room 2.1 Transformer 3 MV(Medium voltage) room 4 Power distribution room...
  • Page 14 User Manual V1.0-2024-6-5 2.1.2.2. MVS rated power 3500-7000kVA (Excluded 3500kVA) Figure 2-4 Appearance Figure 2-5 Component 1.1 D1 Cabinet 1 LV(Low voltage) room 1.2 D2 Cabinet 2 Transformer room 2.1 Transformer 3 MV(Medium voltage) room 4 Power distribution room...

  • Page 15: Dimensions

    User Manual V1.0-2024-6-5 2.1.3. Dimensions 2.1.3.1. MVS rated power ≤ 3500kVA Figure 2-6 Container dimensions...
  • Page 16 User Manual V1.0-2024-6-5 2.1.3.2. MVS rated power 3500-7000kVA (Excluded 3500kVA) Figure 2-7 Container dimensions...

  • Page 17: Nameplate

    User Manual V1.0-2024-6-5 2.1.4. Nameplate Figure 2-8 Nameplate of 3000kVA MVS Figure 2-9 Nameplate of 7000kVA MVS...

  • Page 18: Components Introduction

    User Manual V1.0-2024-6-5 Label Label Name Explanation The equipment operates at high voltage. Electric shock Only qualified and trained electrical warning technicians are allowed to install and operate the equipment. Indicates the position for connecting the Grounding protecting earthing (PE) cable. The equipment is high.
  • Page 19 User Manual V1.0-2024-6-5 LV Cabinet Interior: Figure 2-11 LV Room Structure 1. Air circuit breaker 2. Molded case circuit 3. Wiring area breaker...

  • Page 20: Transformer Room

    User Manual V1.0-2024-6-5 2.2.2. Transformer Room When a fault occurs inside the transformer, a significant amount of gas will be produced, causing the sharp pressure increase inside the transformer. When the gas content is low, the transformer alarms. When the gas content reaches the activation pressure, the gas will be discharged, rapidly reducing the internal pressure of the transformer to the normal level.
  • Page 21 User Manual V1.0-2024-6-5 2.2.2.2. MVS rated power 3500-7000kVA (Excluded 3500kVA) Figure 2-13 Structural layout of transformer room 1 Medium voltage bushing 2 Oil level gauge 3 Moisture absorber 4 Gas relay 5 Oil tank 6 Off-load tap changer 7 Low voltage bushing 8 Oil drain valve 9 Oil temperature gauge 10 Pressure release valve...

  • Page 22: Mv Room

    User Manual V1.0-2024-6-5 2.2.3. MV Room Figure 2-14 MV Room Layout...
  • Page 23 User Manual V1.0-2024-6-5 2.2.3.1. DAQO 24, 40.5kV Ring Main Unit Figure 2-15 Ring main unit DQS-40.5 CVC appearance 1 Earthing switch 2 Load switch 3 Three position operating hole operating hole disconnector 4 Circuit breaker 5 densimeter 6 Live display operation buttom Figure 2-16 Ring main unit DQS-24 DVC appearance 1 Earthing switch...
  • Page 24 User Manual V1.0-2024-6-5 Figure 2-17 Ring main unit DQS-40.5 DVC appearance 1 Earthing switch 2 Load switch 3 Three position operating hole operating hole disconnector 4 Circuit breaker 5 Operation handle 6 Earthing bar operation buttom 2.2.3.2. ABB 24, 40.5kV Ring Main Unit Figure 2-18 Ring main unit SAFE 12/24 CCV appearance 1 Load break switch 2 Earthing switch...
  • Page 25 User Manual V1.0-2024-6-5 Figure 2-19 Ring main unit SAFE 40.5 CCV appearance 1 Load break switch 2 Earthing switch 3 Three position disconnector 4 Push bottons close 5 Push bottons open 6 densimeter...
  • Page 26 User Manual V1.0-2024-6-5 2.2.3.4. Siemens 24, 36kV Ring main unit Figure 2-20 Ring main unit 24kV RRL appearance 1 Load break switch 2 Earthing switch 3 Three position disconnector 4 Push bottons close 5 Push bottons open Figure 2-21 Ring main unit 36kV RRL appearance 1 Load break switch 2 Earthing switch 3 Three position...

  • Page 27: Power Distribution Room

    User Manual V1.0-2024-6-5 2.2.4. Power distribution room Figure 2-22 Power distribution cabinet front view layout Figure...
  • Page 28 User Manual V1.0-2024-6-5 Figure 2-23 Smart Communication Unit appearance Index: See the Smart Communication Unit (SCU3000 series) user manual for details. Figure 2-24 QR code for SCU3000 series User Manual...

  • Page 29: Installation

    User Manual V1.0-2024-6-5 3. Installation Please check the Installation Manual and strictly follow the steps in the manual for installation. 4. Hot and Cold Commissioning 4.1. Introduction 4.1.1. Introduction to main equipment for cold commissioning Figure 4-1 Cabinets Name Type Location Function Inside the MV...

  • Page 30: Mvs Interlocking And Key Diagram

    User Manual V1.0-2024-6-5 4.1.2. MVS Interlocking and Key Diagram When the MVS rated power is between 3500 to 7000kVA Figure 4-2 Interlocking Diagram...
  • Page 31 User Manual V1.0-2024-6-5 When the MVS rated power ≤ 3500kVA Figure 4-3 Interlocking Diagram The key locations of different types of RMU (ring main unit) are shown in the following figure:...

  • Page 32: Interlocking Type Between Mvss

    User Manual V1.0-2024-6-5 4.1.3. Interlocking Type between MVSs NOTICE  The G1 cabinet of each MVS points to the grid side. The G1 and G3 cabinets is not allowed to be swapped, otherwise it will cause interlocking disorder between MVSs. ...
  • Page 33 User Manual V1.0-2024-6-5 Figure 4-5 CCV type ring main unit normal interlocking Figure 4-6 CVC type ring main unit normal interlocking (2) The introduction to the normal key interlocking device for G1 cabinet without load switch in DCV/DVC type cabinet is as follows: As shown in Figure, one of the interlocking devices is installed near the operating shaft of the earthing switch in the upstream G3, and the other key is on the cable room door in the downstream G1.
  • Page 34 User Manual V1.0-2024-6-5 If the earthing switch in upstream G3 is on an open position, the key cannot be pulled out from the key interlock. The downstream G1 cable room door can be opened only when the earthing switch on the upstream G3 cabinet is closed.
  • Page 35 User Manual V1.0-2024-6-5 4.1.3.2. (Optional requirement: G1 cabinet with load switch) A3 Interlocking The purpose of the A3 key interlocking device is described in the following example: As shown in the figure, one of the interlocking devices is installed near the operating shaft of the load switch in the upstream G3, and the other interlocking device is installed near the operating shaft of the earthing switch in the downstream G1.
  • Page 36 User Manual V1.0-2024-6-5 Figure 4-12 The A3 interlocking of the CVC ring main unit 4.1.3.3. (Optional requirements: G1 cabinet with load switch) P1 Interlocking The purpose of the P1 key interlocking device is described in the following example: The purpose of P1 interlocking is to ensure absolutely safe operation of the upstream G3 and downstream G1 by avoiding the closing of the upstream or downstream earthing switch since there is power supply both upstream and downstream to.
  • Page 37 User Manual V1.0-2024-6-5 If the load switch in the upstream G3 is in a closed position, the key cannot be pulled out or rotated in the key interlock device. The downstream earthing switch can be closed only when the load switch in the upstream G3 is opened.

  • Page 38: Cold Commissioning

    User Manual V1.0-2024-6-5 4.2. Cold Commissioning The specific steps for cold commissioning after the completion of installation are as following: 1) Overall inspection; 2) Insulation test; 3) Testing of components inside the MVS; 4) Hot commissioning preparation status setting. 4.2.1. Overall Inspection before Cold Commissioning 4.2.1.1.
  • Page 39 User Manual V1.0-2024-6-5 4.2.1.2. Check the Interlocking function Introduction to the Key Status inside the MVS Interlocking device Switch status Key status Yes/No Note name can be pulled Opened out after N.A. unlocked G1：Earthing switch can not be Closed N.A. pulled out can be pulled Opened...
  • Page 40 User Manual V1.0-2024-6-5 K8,K9,K10,K11 can not be not inserted pulled out can be pulled Door closed out after Transformer door K8 unlocked can not be Door opened pulled out can be pulled Door closed out after Transformer door K9 unlocked can not be Door opened pulled out...
  • Page 41 User Manual V1.0-2024-6-5 Interlocking between 1QF & 2QF and G2 three position Steps Yes/No Note disconnector (MVSs rated power 3500 ~ 7000kVA) There is a key chain K14&K4 between the G2 three position disconnector key K4 and the LV key container key K14. When the MVS leaving the factory, K4 (key chain) is inserted next to the G2 three position disconnector.
  • Page 42 User Manual V1.0-2024-6-5 Interlocking between transformer door and G2 earthing Steps Yes/No Note switch After manufacture, there are keys K8, K9, K10, K11 for the four doors of the transformer in the MV key container. There is a key chain K3&K7 for the key K7 of the MV room key container and the G2 earthing switch key K3.
  • Page 43 User Manual V1.0-2024-6-5 4.2.1.3. The Inspection of LV Cabinet Step Project Status Confirmed Yes/No Note The equipment is in good condition, with no rust or paint peeling. (If any paint peeled, repaint it). Labels on the device are clearly visible. Damaged labels must be replaced prompt.
  • Page 44 User Manual V1.0-2024-6-5 without damage, and the line markings are clear. Temperature and The appearance is not damaged, and the humidity controller labels on the buttons are clearly visible. The appearance of the heat exchanger is intact, without any damage, and is well fixed. The wires are well secured and the labels are Inspection of the clearly visible.
  • Page 45 User Manual V1.0-2024-6-5 4.2.1.4. The Inspection of the Transformer Step Project Status Confirmed Yes/No Note There are no cracks, scratches or dents on the appearance of the transformer. The connection cover between the Appearance transformer and the LV room is free of inspection damage, rust, or paint peeling, and is well sealed.
  • Page 46 User Manual V1.0-2024-6-5 There is no appearance damage. The pressure Remove the pressure relief valve cover and relief valve check that it has not popped up. There is no appearance damage or no gas inside the gas relay. If there is a small amount Gas relay of gas, the air can be exhausted through the inspection...
  • Page 47 User Manual V1.0-2024-6-5 4.2.1.6. The Inspection of the Power Distribution Room Step Project Status Confirmed Yes/No Note All components in the power distribution room are intact, buttons and keys are clearly written, and there are no loose installations. Overall inspection All wiring is tight and undamaged.

  • Page 48: Insulation Test

    User Manual V1.0-2024-6-5 4.2.2. Insulation Test NOTICE  Before installing and sealing the outgoing cable, insulation test should be conducted on the LV side. If the cable wiring is completed, all MCCBs connected to the inverters need to be turned off. ...
  • Page 49 User Manual V1.0-2024-6-5 Short connect the three-phase busbar of D1 (as shown in the above figure), connect the positive pole of the insulation tester to one of the phases, and ground the negative pole. Test voltage is 1000V, test duration is 1 minute, record the resistance value at 10s (should be greater than 10MΩ) Record the resistance value at 30s (should be greater than 10MΩ) Record the resistance value at 60s, then stop the test and turn off...

  • Page 50: Device Testing Inside The Mvs

    User Manual V1.0-2024-6-5 4.2.3. Device testing inside the MVS The test of the components inside the MVS needs to be powered by an external power supply. There are two types of external power supply:  Three-phase generator with an output voltage of 380V. ...
  • Page 51 User Manual V1.0-2024-6-5 Power on the SCU3000 series and connect it to the computer, establishing communication between the inverter and the MVS. Open the website to display the commissioning interface and check that all signals are normal; If it is abnormal, please record the phenomenon and contact relevant personnel.
  • Page 52 User Manual V1.0-2024-6-5 Power on the SCU3000 series and connect it to the computer. Open the website to display the commissioning interface and check that all signals are normal; If it is abnormal, please record the phenomenon and contact relevant personnel. Please note that the door of the distribution room should be open, so a "door open"...

  • Page 53: Hot Commission Default Setting

    User Manual V1.0-2024-6-5 4.2.4. Hot Commission Default Setting NOTICE It is recommended that cold and hot commission should be performed within a one month interval, and follow the steps below for the commissioning; Otherwise, all MCCBs, MCBs, FUSEs in the LV cabinet and P room will be disconnected. Step Operation Yes/No...

  • Page 54: Hot Commissioning

    User Manual V1.0-2024-6-5 4.3. Hot Commissioning NOTICE  Special protective equipment must be used during the operation, such as wearing protective clothing, insulated boots, wearing face protection helmets, insulated gloves, etc.  It is necessary to set up the parameters correctly by professional personnel for the first running of the equipment.

  • Page 55: Pre-Hot Commissioning Inspection Program

    User Manual V1.0-2024-6-5 4.3.1. Pre-hot Commissioning Inspection Program The steps for hot commissioning are as shown in the Figure table. Figure 4-18 Commissioning steps for MVSs with the rated power ≤ 3500kVA Figure 4-19 Commissioning steps for MVSs with the rated power 3500~7000kVA (Excluded 3500kVA) Steps Item...
  • Page 56 User Manual V1.0-2024-6-5 4.3.1.1. Inspection of the Ring Main Unit (DVC/DCV/DV) Steps Operation Yes/No Note Check that both transformer doors are closed and the Transformer door keys are placed in the key container in the MV room. Check that the G2 earthing switch is closed, the three MVS 3 (DV) position disconnector is open, and the vacuum circuit breaker is open.
  • Page 57 User Manual V1.0-2024-6-5 4.3.1.2. Inspection of the Ring Main Unit (CCV/CVC/CV) Steps Operation Yes/No Note Check that both transformer doors are closed and the door Transformer keys are placed in the key container of the MV room. Check that the G2 earthing switch is closed, the three position disconnector is open, and the vacuum circuit breaker is open.

  • Page 58: Ups Circuit Power-On

    User Manual V1.0-2024-6-5 4.3.2. UPS Circuit Power-On Turn on the UPS, close all switches downstream of the UPS, and ensure that the following devices are operating normally. Steps Operation Phenomenon Yes/No Note Close the relevant MCB of The device display shows ACB controller 1 values The device display shows...

  • Page 59: Rmu Power-On

    User Manual V1.0-2024-6-5 4.3.3. RMU Power-On 4.3.3.1. Power On the Ring Main Unit (CCV/CVC/CV) Steps Operation Yes/No Note For G2, close the three position disconnector after inserting the key and unlocking it. MVS 3(CV) For G1, open the earthing switch after inserting the key and unlocking it, and close the load switch.
  • Page 60 User Manual V1.0-2024-6-5 CVC+CV 4.3.3.2. Power On the Ring Main Unit (DVC/DCV/DV) For G2, close the three position disconnector after inserting the key and unlocking it. Steps Operation Yes/No Note For G2, close the three position disconnector after MVS 3(DV) inserting the key and unlocking it.
  • Page 61 User Manual V1.0-2024-6-5 The status of RMU after power on is shown as below: DVC+DV DCV+DV After the RMU is powered on, check the following items: Steps Operation Yes/No Note The display of G1 cabinet flash. MVS 1 The display of G2 cabinet is powered off. The display of G3 cabinet flash.

  • Page 62: Power On The Transformer

    User Manual V1.0-2024-6-5 4.3.4. Power On the Transformer Steps Operation Yes/No Note Store energy to the vacuum circuit breaker in G2 manually or electrically. Close the vacuum circuit breaker in G2. MVS 1 Check if RMU is running. Check if the transformer is running. Store energy to the vacuum circuit breaker in G2 manually or electrically.

  • Page 63: Power On The Auxiliary Circuit

    User Manual V1.0-2024-6-5 4.3.5. Power on the Auxiliary Circuit Close all micro breaker in the P cabinet to ensure that the following equipment is operating properly. Steps Operation Yes/No Note Heat exchanger Temperature and humidity controller Air-conditioning P1 socket P2 socket 4.3.6.

  • Page 64: Running Without Load

    User Manual V1.0-2024-6-5 4.3.7. Running without Load Steps Operation Yes/No Note When the above steps are completed, close all doors. Keep the MVS running without load for 24 hours (recommended 24 hours, the specific time is subject to the project) After no-load running without abnormality or failure, open the container door and proceed to the next step.

  • Page 65: Routine Maintenance

    User Manual V1.0-2024-6-5 5. Routine maintenance The components inside the MVS may age and wear out due to the influence of ambient temperature, humidity, dust, vibration, etc., leading to potential failures. Therefore, it is necessary to perform daily and regular maintenance to ensure normal operation and to extend service life.

  • Page 66: Power Off And Shut Down For Maintenance

    User Manual V1.0-2024-6-5 NOTICE  Please maintain the equipment only when you are familiar with the contents of this manual and have appropriate tools and testing devices.  During the maintenance process, please try to prevent irrelevant personnel from entering, and temporary warning signs or fences must be erected for isolation.
  • Page 67 User Manual V1.0-2024-6-5 Steps Operation Yes/No Note Remote control opening LV cabinet 1QF air circuit breaker. Remote control opening LV cabinet 2QF air circuit breaker. (MVSs with the rated power ≤ 3500kVA do not include the D2 Cabinet) Remote control opening ring main unit G2 cabinet vacuum circuit breaker. Manually open the three position disconnector of the ring main unit G2 on site and confirm that the live display is off.

  • Page 68: Ring Main Unit

    User Manual V1.0-2024-6-5 5.2.2. Ring Main Unit This section takes the second MVS (MVS 2) as an example to introduce the power off and maintenance procedures of the ring main unit. The operation steps of DCV and CVC are the same. The switch status before maintenance: Figure 5-3 The switch status before maintenance: Steps...

  • Page 69: Cables Between Ring Main Units

    User Manual V1.0-2024-6-5 Figure 5-4 the switch status after maintenance 5.2.3. Cables between Ring Main Units This section takes the second MVS (MVS 2) as an example, and take the MVS 1 and MVS 2 as an example to introduce the power off and maintenance procedures between MVSs.
  • Page 70 User Manual V1.0-2024-6-5 All the G2 cabinet of the next level: opening vacuum circuit breaker, opening three position disconnector, closing earthing switch. The upper lever G3 cabinet: open the load switch, observe that the live display of G3 cabinet is not flashing, and close the earthing switch.
  • Page 71 User Manual V1.0-2024-6-5 Steps Operation Yes/No Note Remote control the opening of this level LV cabinet 1QF air circuit breaker. Remote control the opening of this level LV cabinet 2QF air circuit breaker. (MVSs with the rated power ≤ 3500kVA do not include the D2 Cabinet) G2 cabinet of this level: opening vacuum circuit breaker, opening three position disconnector, closing earthing switch.

  • Page 72: Routine Maintenance

    User Manual V1.0-2024-6-5 5.3. Routine maintenance Routine inspection and maintenance must comply with the relevant regulations of the power company. Inspection, maintenance and repairs can only be performed by trained personnel who are familiar with the equipment. Personnel must be certified and comply with safety regulations issued by the power company.
  • Page 73 User Manual V1.0-2024-6-5 During operation, check whether the sound of the transformer is normal. Check the transformer oil level indicator. If the oil level is low, please power off the MVS and fill in oil in time Check whether there is oil leakage around the pressure relief valve.

  • Page 74: Common Parts Replacement

    User Manual V1.0-2024-6-5 5.4. Common parts replacement 5.4.1. Replacement of Arrester NOTICE Do not replace the arrester on rainy days. Replacement steps (see the arrester user manual for details): 1. The arrester is located in the cable room of the circuit breaker cabinet of the ring main unit.

  • Page 75: Replacement Of Air Circuit Breakers

    User Manual V1.0-2024-6-5 5.4.2. Replacement of Air Circuit Breakers NOTICE Make sure the equipment is powered off and the air circuit breaker is in the "OFF" position Steps: 1) Remove the copper bar at the back of the ACB. 2) Remove the signal cable and grounding cable of the air circuit breaker and mark them.
  • Page 76 User Manual V1.0-2024-6-5 3) Remove the fixing bolts between the ACB and basement (M10 external hexagonal bolts). 4) Replace with a new air circuit breaker and tighten the bottom fixing bolts. 5) Reinstall the copper bar, signal cable and grounding cable, and tighten the fixing bolts of the air circuit breaker base.

  • Page 77: Replacement Of Molded Case Circuit Breakers

    User Manual V1.0-2024-6-5 5.4.3. Replacement of Molded Case Circuit Breakers NOTICE  If need replacement, please contact Goodwe after-sales service or local Goodwe staff according to the spare parts list.  If the short-circuit fault current ≤ ICU (ultimate short-circuit breaking capacity), after one short-circuit fault occurs, the circuit breaker needs to be replaced.

  • Page 78: Oil Surface Temperature Gauge Replacement

    User Manual V1.0-2024-6-5 3) Remove the fixing bolts of the MCCB and remove the MCCB. 4) Replace with a new molded case circuit breaker and fix the circuit breaker on the support plate and tighten it. 5) Restore the removed copper bars and cables to their original state. 6) Install the upper cover of the molded case circuit breaker.
  • Page 79 User Manual V1.0-2024-6-5 5.4.4.4 Remove the oil surface temperature gauge Use a screwdriver to remove the screws that secure the oil surface temperature gauge in place. 5.4.4.5 Replace the oil surface temperature gauge and probe 5.4.4.5.1 Take a qualified oil surface temperature gauge along with the matching screws.

  • Page 80: Replacement Of Micro Circuit Breakers

    User Manual V1.0-2024-6-5 5.4.5. Replacement of Micro Circuit Breakers NOTICE Ensure that the equipment is powered off and place the micro circuit breaker in the "OFF" position. Steps: 1) Remove the cables connecting the upper and lower ends of the micro circuit breaker.

  • Page 81: Replacement Of Lighting Lamps

    User Manual V1.0-2024-6-5 5.4.6. Replacement of lighting lamps Steps: 1) Remove the cable from the power supply terminal of the lighting lamp and mark it (unscrew the cable terminal cover and press the plastic part as shown in figure with your hand to pull out the cable). 2) Remove the lamp fixing screws (M6 external hexagonal bolts) and remove the lamp.

  • Page 82: Replacement Of Heater

    User Manual V1.0-2024-6-5 2) Insert the new smoke sensor into the base and rotate it clockwise to the locking position. 5.4.8. Replacement of heater The heating plate is located under the cable room of the LV cabinet. Steps: 1) Remove the cables on the heating plate and mark them. 2) Remove the fixing screws of the heating plate (M6 and M4 screws).

  • Page 83: Replacement Of Measuring And Controlling Device

    User Manual V1.0-2024-6-5 5.4.9. Replacement of Measuring and controlling Device NOTICE 1. Please ensure that the equipment is powered off before replacing the measuring and controlling device. 2. Before replacing the measuring and controlling device, please ensure that the secondary side of the current transformer cannot be open circuited.

  • Page 84: Ups Replacement

    User Manual V1.0-2024-6-5 3) Remove the screws that fix the device, and remove the device (M6 external hexagonal bolts). 4) Replace with a device and fix it in its original position. 5) Restore the cables on the back of the device to its original status. 5.4.10.

  • Page 85: Replacement Of The Heat Exchanger Rain Shield

    User Manual V1.0-2024-6-5 2) Remove the UPS fixing bracket and take out the UPS (M8 semi-round head square neck bolt). 3) Replace with a new UPS and secure it. 4) Restore the cables and plugs on the back of the UPS to the original status. 5.4.11.

  • Page 86: Replacement Of The Air Conditioner

    User Manual V1.0-2024-6-5 5.4.12. Replacement of the air conditioner Steps: 1) Open the door of the power distribution room, remove the cables on the air conditioner, and mark them. 2) Remove a circle of fixing screws around the air conditioner and remove the air conditioner (M5 hexagon socket bolts).

  • Page 87: Replacement Of The Moisture Absorber

    User Manual V1.0-2024-6-5 5.4.13. Replacement of the Moisture Absorber Steps: 1) Remove the Moisture Absorber (M12 external hex bolts). 2) Tear off the adhesive paper on the flange.
  • Page 88 User Manual V1.0-2024-6-5 3) Place a sealing gasket on the flange. 4) Install the respirator to the breathing tube port, tighten the bolts diagonally, and install the sealing gasket as shown in the following figure. 5) Remove the oil cup and fill the cup with oil level between the two red lines. 6) Install the oil cup.

  • Page 89: Paint Repairing

    User Manual V1.0-2024-6-5 5.5. Paint repairing Degree of Tools and paint Steps materials damage 1. Use fine sandpaper to polish the damaged areas and remove stains or rust. Shallow 2. Moisten the cotton cloth with alchol, wipe the scratches(no polished area or the area to be repaired to remove exposed surface dirt and dust, and then wipe dry with clean Small area paint...

  • Page 90: Technical Parameters

    User Manual V1.0-2024-6-5 6. Technical Parameters Transformer GW3500K-MVS GW7000K-MVS Transformer Type Oil immersed Oil immersed Rated Power (kVA) 3500@40℃ 7000@40℃ Vector Group Dy11 Dy11-y11 LV/MV Voltage (kV) 0.8/10~35 0.8-0.8/10~35 Maximum Input Current at Nominal 2526 2*2526 Voltage (A) Frequency (Hz)
  • Page 91 User Manual V1.0-2024-6-5 Transformer GW3500K-MVS GW7000K-MVS 5 kVA/400V (Optional: 5 kVA/400V (Optional: Auxiliary Power Supply max. 20kVA) max. 20kVA) Ingress Protection Rating IP54 IP54 0 – 95 % RH 0 – 95 % RH Relative Humidity Max. Operating Altitude (m）...
  • Page 92 User Manual V1.0-2024-6-5 7. Appendix Alternating Current Air Circuit-Breaker Direct Current Fuse Low Voltage Micro Circuit Breaker MCCB Molded Case Circuit Breaker Medium Voltage Medium Voltage Station O&M Operations & Maintenance Protecting Earthing Power Line Communication Personal Protective Equipment Ring main unit Surge Protection Device Uninterruptible Power Supply Vacuum Circuit Breaker...
  • Page 93 User Manual V1.0-2024-6-5...

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