| After-sales Service: | 1 Year |
|---|---|
| Warranty: | 1 Year |
| Display Type: | Digital Only |
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1,Project Location:
2,Equipment Name: 35KV High Voltage Shielded Test Hall
3,General Equipment Requirements: The dimensions of the high voltage test hall building are: length 9m, width 5m, height 4m. The shielding system of the test hall should comprehensively consider factors from various disciplines such as architectural aesthetics, electrical engineering, environmental protection, security technology, HVAC purification technology, computer science, low-voltage control, fire protection, and electromagnetic radiation. The project should adhere to the principles of being aesthetically pleasing, practical, economically reasonable, and easy to manage, meeting national standards, and ensuring advanced technology, economic rationality, convenient construction, and safety reliability.
4,The shielding system of this test hall is an ampere project, including the following items:
| No. | Equipment Components | Quantity | Remarks |
|---|---|---|---|
| 1 | Grounding System | 1 set | New |
| 2 | Shielding Shell | 1 set | New |
| 3 | Electric Sliding Airtight Shielding Door | 1 set | New |
| 4 | Controller | 1 set | New |
| 5 | Manual Shielding Door | 1 unit | New |
| 6 | Power Distribution System for Shielding Room and Control Room | 1 set | New |
| 7 | Ventilation System | 1 set | New |
| 8 | Third-party Inspection Report | 1 copy | New |
| 9 | Other |
The shielding project of this high-voltage hall meets the requirements for the test environment of high-voltage AC and DC power transmission and distribution products up to 35kV (with reserved space for upgrading to 2kV for test equipment), including AC and DC withstand voltage tests, partial discharge tests, and cable accessory tests.
| Environmental Temperature | Minimum: -10ºC, Maximum: +40ºC |
|---|---|
| Relative Humidity | 20%-95% |
| Altitude | Below 500m |
| Installation Method | Indoor |
| Power Supply | Three-phase five-wire 380VAC (±10%), 50Hz (±1Hz) |
| Dimension | High-voltage hall shielding shell dimensions | Approximately 9×5×4 (H) m |
|---|---|---|
| Control room dimensions | 3.5×2.5×2.8 (H) m | |
| Shielding Range | Shielding effectiveness | Magnetic field 14kHz~1MHz ≥60dB |
| Electric field | Electric field 100 kHz~1GHz ≥70dB | |
| Reverberation time | <55 (at 100Hz) | |
| Seismic intensity | 7 degrees | |
| Grounding resistance | ≤1.0Ω | |
| Insulation resistance | Floor | ≥1000MΩ |
| Shielding room and main building | ≥10kΩ | |
| Background noise | ≤2.0pC |
The high pressure test hall is a six-sided shield structure, and its four walls and ceiling shields are made of single-layer shield plates splicing and welding.
1.1 Shielding on five sides of wall and top surface
(1) The ceiling and wall are made of invisible assembly structure, and the shielding plate made of 2.0 thick galvanized sheet is processed.
(2) The joint between the board and the board is connected by full welding or screw gasket penetration pressure. The inner wall sound absorbing board is a plug-in type screw with a width greater than 50mm, and it is necessary to ensure that the connection between the board and the board is reliable. The entire shielding surface is a plane, without affecting the shielding effect of the tip of the protruding part, to maintain grounding continuity. The flatness error of the shield plate after installation is not more than 2mm/m2
(3) All the Yin and Yang corners of the hall are made of shielded perforated plates, and the vertical Yin corners of the hall are rounded. The connection method and material are the same as the plane shielding plate of the hall. Note that the wind truss beams around the hall should pass through and be covered;
(4) The structural form of the hole of the shield plate: add a steel frame at the junction of the shield plate with the door and the hole, and the shield plate should be continuously electrically sealed with the steel frame, and the CO2 protection welding should be fully welded.
(5) The wall and top surface shielding purlins are rectangular tubes with specifications of 60*40*20*2.0mm. The wall shielded purlins are installed and fixed on the main steel structure, the top shielded purlins are installed on the top hanging bar, the hanging bar specifications are 50x50 Angle steel, and the Angle steel is welded and fixed on the top main structural beam. After brushing on the anti-rust protective paint at all welding points, the user confirms that the frame purlin construction is completed before the installation of the shielding board.
1.2 Ground Shielding
(1) 1250mmx3000mm single-layer galvanized steel plate is used, and the width and thickness of the wire stem are greater than 1.2mm. The ground shielding steel plate layer is under the bearing steel mesh in the floor;
(2) The ground steel plate lap width ≥50mm, welding should be carbon dioxide gas protection welding, solder joint spacing should be less than 20mm, spot welding, solder joint brush anti-rust paint treatment, arranged ground shield layer on the ground and fluctuation is not more than 5cm;
(3) When the grounding pole passes through the ground electromagnetic shielding layer, there should be more than three wires fully welded with the test grounding net to ensure the overall electromagnetic shielding performance and reliable electrical connection;
(4) The ground galvanized steel plate is connected with the wall transition shielding plate;
(5) Before pouring concrete, clean up the construction site, and do not allow any debris such as steel welding rods;
1.3 Shielding of water and gas points
The decorative door with the same material as the shielding plate is installed, and the water and air inlet are put into the box. The box is of metal structure and metal door. The box is embedded and fully welded with the shielding layer.
1.4 Shielding of bridge crane: No bridge crane is installed in this test hall;
1.5 Shielded Door
(1) This test hall is equipped with a 3.2×3.5 (H) m (effective size of the door) set of electric airtight shielded sliding door. The opening part of the screen door is connected by reed airtight contact, and the rest is welded/crimped.
(2) The screen door is a doorless translation airtight screen door, using the upper load horizontal translation form, the ground at the threshold should ensure the shielding effect and facilitate the entry and exit of the air cushion vehicle and the flatbed vehicle. The door can be manually/automatically controlled (electrical interlock), can be activated, fast forward, slow forward, emergency stop (and interlock device), and the test alarm light is set outside the door. The door transmission mode adopts upper transmission, frequency conversion speed regulation, PLC program control, touch screen operation, smooth running, with infrared anti-pinch safety function. The door has a left and right limiting device to prevent the door from slipping. The control box of the gate is arranged in the steel column interlayer, and the control box is arranged at an appropriate position on the shielding wall of the hall to control the opening of the gate. The inner surface adopts the same aluminum-plated zinc plate as the inside of the hall, and the outer surface adopts the same color decoration plate as the exterior wall;
Main technical parameters and requirements of shielding gate:
(1) Opening speed: 6m/min, can be freely adjusted;
(2) the flatness of the gate frame: ≤L/1000 (L is the width of the gate);
(3) Flatness of the top surface of the track ≤2mm (within the full length range)
(4) the straightness of the center line of the track (guide wheel groove) is less than 1mm; Longitudinal slope of track (guide groove) ≤0.6L/1000
(5) Track joint up and down ≤0.1mm; Track joint ≤0.1mm; Track joint clearance ≤1mm;
(6) The gate is welded with section steel;
(7) The door should ensure smooth switching and flexible control;
(8) The control part adopts 24V safety power supply, and installs the limit switch and work indicator to ensure the safety of the test and personal;
(9) The door should have an emergency stop function.
1.6 Shielding small doors
Between the hall and the control room, there is a single access screen door, which is manually locked. Specifications 1.0×2.0(H)m, quantity 1 set, the structure adopts hinge rotation, manual knife type screen door, double-point locking mechanism, easy to open and labor-saving, double-layer electromagnetic sealing reed. The shielding reed is removable and easy to replace if damaged.
(1) The thickness of the shield door plate is not less than 2mm thick, and the double-sided galvanized high-quality cold-rolled steel plate is used. The cold-rolled steel plate is continuously welded through the fusion welding process to become a double-layer shielded shell, and the inside of the shell should be lined with steel to strengthen the keel to meet the structural strength requirements of the door body.
(2) When closing the door, manually close the door and drive the hinge of the door. When the fixed shaft sleeve on the door is closed to the miter chute entrance fixed on the door frame, press the rotating handle in the middle of the door plate and press the knife insert part of the door door to the reed groove of the door frame to play the role of electromagnetic shielding. Both indoor and outdoor operation.
(3) When opening the door, lift up the rotating handle in the middle of the door panel, and remove the knife part of the door panel from the reed notch of the door frame. At the same time, the fixed shaft sleeve on the door panel is also returned to the entrance of the miter chute. At this time, pull the handle and drive the hinge of the door panel to rotate until the door panel is opened. Both indoor and outdoor operation.
(4) The specific structure adopts hinged rotation, slotted knife manual screen door, double-point locking mechanism, two-layer electromagnetic sealing reed, reed made of beryllium bronze material processing and vacuum heat treatment to achieve good elasticity and wear resistance. The shielding reed is removable and each length is 198mm.
(5) The knife edge of the insert knife screen door is made of an iron matrix with good permeability by copper plating, so that its inherent ferromagnetism and high conductivity after copper plating take into account the requirements of the shielding efficiency of the entire frequency band.
(6) The reed and its contact part (the knife edge of the screen door) are of the same material, the potential difference is similar, and there will be no electrical corrosion at the contact point of each other to ensure long-term shielding effectiveness.
(7) Single flat door, outer surface layer spray color provided by the user.
1.7 Shielding requirements for ventilation, pipelines, floor drains and fire boxes
Low noise axial fan installed above the shield housing (supplied by a)
(1) The top of the shielded hall is provided with a waveguide ventilation outlet, the specific specifications are: 300×600mm, the number is 4. Honeycomb panel is used as the ventilation waveguide window for ventilation, with low wind resistance and high wind efficiency, and its shielding performance is consistent with the overall efficiency of the test hall.
(2) Pipeline shielding treatment: the pipeline entering the shielding interface (such as the water pipe of the fire hydrant, etc.) is welded together with the shielding plate through the wave guide of the same diameter. When cables enter the shielding interface, they must be entered through steel pipes. The steel pipes are welded into the shielding plate, and the connection points are greater than 2 points.
(3) The fire hydrant box (if any) inside the test hall is embedded in the shielding plate, and the shielding plate is fully welded around it, flush with the surface of the shielding chamber of the hall (embedded installation), and the corresponding shielding treatment is made.
1.8 Filter and Power supply
(1) All the equipment and lighting power in the test hall are sent to the main distribution box of the control room according to the size of the power load of each equipment, power supply cables with appropriate diameters and power filters with different capacities, and then distributed to the terminal box or distribution box of each equipment.
(2) The power supply of all auxiliary equipment in the test hall should be filtered through the power filter and sent to the main distribution box in the hall, and then distributed to each distribution box.
(3) The lines distributed from the distribution box, which need to pass the shielding interface, must be processed by the power filter to enter and exit.
(4) The specifications of the power filter are configured in the hall; 1 AC380V/50Hz 4×63A, 1 AC220V/50Hz 2×32A (special for air conditioning), 1 air conditioning signal filter (control room), 1 telephone filter.
1.9 Shielding treatment of lighting fixtures;
(1) The lighting fixture at the top of the test hall is above the shielding roof, a shielding net cover is installed at the opening of the lamp, the lighting fixture is installed outside the shielding layer of the hall, and the lighting switch is controlled outside the hall. The lighting power is routed from the outdoor distribution box to the junction box of the lighting fixture.
(2) Because the lamps and wiring are outside the hall, the pipe wiring does not need to be screened, which provides convenience for future line maintenance and lamp replacement.
(3) The test hall lighting uses 4 sets of 200WLED lights and does not produce office release interference.
(4) The safety exit lights and indicators in other locations are the same as the hall lighting.
1.10 Weak current network system
1.11 Grounding the System
(1) The construction party shall determine the technical plan of the grounding system by itself. It is necessary to ensure that the grounding resistance of the ground wire system of the high-voltage test hall is less than 1.0Ω, and finally ensure that the shielding shell, the ground shielding network, the ground bearing steel network and the grounding wire system are reliably electrically connected. (The shielding construction party can also provide drawings to guide the civil construction party)
(2) Copper plates 200×200×20 (thick) for grounding are installed on the ground of the hall, and the grounding copper plate is electrically connected to the grounding system reliably. Each ground copper plate is equipped with four M16 threaded holes and four hexagonal countersunk screws, two sets of which one set is for equipment use and one set is spare. The installation position is determined on site.
(3) Before the construction of the grounding system, the shielding construction party shall coordinate the cross-construction details with the civil construction party.
1.12 Floor insulation
(1) Material: PP board (thickness 6mm polyvinyl plastic board)
(2) Insulation floor index: insulation floor (tank) immersed in water measuring resistance >100MΩ, insulation floor resistance after the completion of the shielded room: If the shielding room has no shielding room, the insulation resistance of the shielding room to the ground of the adjacent building should be greater than 10KΩ and must be measured with an insulation meter above 500V. If the shielding room has no parent building, the insulation resistance of the shielding room to the ground of the adjacent building should be greater than 10KΩ and must be measured with an insulation meter above 500V.
1.13 Electrical control Safety System (Electrical interlocking)
(1) All doors to the high-voltage laboratory are equipped with electrical safety limit switches.
(2) The safety circuit connects all door switches and all test circuits, and automatically cuts off the added high voltage in case of failure of the test system or test procedure.
(3) The alarm light is installed outside the door and connected to the switch cabinet, the red light indicates that the test is in progress, and the green light indicates that you can enter the laboratory.
(1) The control room adopts the mold frame structure, which is a six-sided decoration structure and is installed in the hall with a specification of 3.5*2.5*2.8m (H); The control room is equipped with 1 network cable and 1 network cable filter. One air conditioner;
(2) The body is made of environmental protection purification board, the thickness of the steel plate is 0.4mm on both sides, no punching, and the unit module board is assembled by stamping processing.
(3) The contact surface adjacent to the steel plate of the unit module is punched with regular installation holes. After the conductive lining with elastic and electrochemical corrosion resistance is clamped into the wall panel shell during installation, the waist type gasket is attached with M8 galvanized bolts and the hole distance is 50mm to improve the shielding efficiency.
(4) The outer layer of the steel plate of all shielding unit modules shall be sprayed with anti-rust treatment (color RAL7035).
(5) The side facing the test area is a double-frame double-glass shielded observation window, the specification of the observation window is about 2.2m wide × 1.5m high, and the middle is lined with 20-mesh φ0.27mm stainless steel wire shielding net, which is vertically arranged and straight, and maintained equidistance during construction, or a better scheme is adopted to achieve beautiful appearance and good vision. Both ends of the screen mesh are welded with the Angle steel of the window frame; The window frame has a reliable electrical connection to the ground system.
(6) The door of the control room: the test hall to enter the control room, equipped with a manual single-opening screen door, the control room to enter the test area, equipped with an ordinary steel door, the size of 0.9×1.9m, the number of 1 set.
(7) For control equipment, lighting, auxiliary equipment to take power directly from the control room of the power distribution cabinet, equipped with a 220V/65A filter.
(8) In order to control the indoor ambient temperature, an air conditioner with 1.5 PCS is installed indoors to ensure that the connections between the indoor and outdoor units of the air conditioner enter the shielded room after filter processing, and the refrigerant tube must enter the room after shielding treatment.
(9) Ventilation waveguide window: Two 300×300mm ventilation waveguide Windows are configured on the top of the shielding layer of the control room for natural ventilation of the control room.
(10) Electrical configuration:
(1) The control room is equipped with an electric control box. One of them is used to control the indoor lighting and sockets in the control room, and control the electricity consumption of the dehumidifier.
(2) The top of the control room is equipped with 2 LED flat lights to ensure that the illumination meets the requirements of use, divided into 2 ways of control, and the light switch is installed in the place where it is easy to open and close;
(3) 2 indoor installation equipment sockets and auxiliary equipment sockets (220V, 10A), 1 telephone socket, 1 network socket; (All sockets, electrical boxes, etc., are dark)
(11) Interior decoration of control room:
(1) The floor adopts all-steel antistatic raised floor. All steel anti-static floor (600x600), erection height according to the design requirements. All steel antistatic floor set function and beauty in one, good wear resistance, no deformation, no cracking, corrosion resistance, antistatic.
(2) The inner wall is made of light steel keel for the skeleton, white double-sided aluminum-plastic board for the surface layer (or fireproof clean board), stainless steel baseboard, fireproof, wipeable, good durability.
(3) The ceiling adopts white 0.7 mm microporous aluminum ceiling (600×600) as the ceiling surface layer. The white micro-porous aluminum plate ceiling has a simple and refreshing feeling, and has a good sound absorption effect and ventilation function.
On the whole, the construction of the control room space follows the design purpose of practicality, aesthetics, shielding, fire prevention and coordination, emphasizing practicality and taking into account aesthetics.
(12) The Demander shall be responsible for the external decoration of the control room.
Upon completion of installation and commissioning, Party A and Party B shall agree to entrust a qualified third-party testing institution to form an acceptance team to independently inspect the shielded room and issue a shielding effectiveness test report. After the test equipment is installed, the joint acceptance shall be carried out. The specific acceptance report shall be subject to the joint acceptance of the three parties (the test equipment party, the shielded hall supplier and the demand party).
Zoning according to plan → Preparation before construction → Grounding system construction → civil backfill and waterproofing treatment → Ground shielding construction → Top and wall purlins and shielding frame construction → Top and wall shielding panel installation → Installation of shielding gates, shielding doors, waveguide Windows, lighting fixtures and other ancillary facilities → Installation and commissioning of wave, distribution box, cable, security and other facilities → Electrical communication → Exterior Decoration → floor construction → Third party screening effectiveness testing → both parties jointly organize acceptance → project completion (if qualified).
| GB/T30842-2014 | "Requirements and Measurement Methods for Electromagnetic Shielding Effectiveness in High-Voltage Test Laboratories" |
| GB/T12190-2006 | "Measurement Methods for Shielding Effectiveness of Electromagnetic Shielding Rooms" |
| GB50169-2016 | "Code for Construction and Acceptance of Grounding Devices" |
| SJT31470-2002 | "Code for Construction and Acceptance of Electromagnetic Shielding Room Engineering" (Issued by the Ministry of Information Industry) |
| GB/T50076-2013 | "Code for Measurement of Reverberation Time in Rooms" |
| GB12348-2008 | "Emission Standards for Industrial Enterprises Noise at Boundary" |
| GB50800-2012 | "Technical Code for Anechoic and Semi-Anechoic Rooms" |
| GB3096-2008 | "Environmental Quality Standards for Noise" |
| GB12523-2011 | "Emission Standards for Noise at Boundary of Construction Sites" |
| GB50222-2017 | "Code for Fire Prevention in Building Interior Decoration Design" |
| GB12349-2008 | "Emission Standards for Community Noise" |
| GB8624-2014 | "Classification for Burning Behavior of Building Materials and Products" |
| GB50016-2014 | "Code for Fire Protection Design of Buildings" |
| GB50150-2006 | "Standard for Handover Testing of Electrical Equipment in Electrical Installation Engineering" |
| JGJ46-2016 | "Technical Code for Safety of Temporary Electricity on Construction Sites" |
| CECS71∶1994 | "Code for Visual Inspection of Welding on Construction Sites" (China Engineering Construction Standardization Association) |
| GB50169-2016 | "Code for Construction and Acceptance of Grounding Devices in Electrical Installation Engineering" |
| GB/T 16927.1-1997 | "High-Voltage Test Techniques Part 1: General Test Requirements" |
| GB/T 7354-2003 | "Partial Discharge Measurements" |
The above refers to standards and specifications, or other standards that need to be involved in the manufacturing process, and should be based on the latest version.
The construction shall mainly be based on the standards and specifications mentioned in the above articles, the technical scheme and requirements of the user, and the temporary scheme determined by the parties during the construction process.
The high-voltage test hall is a six-sided shield structure with a length of 9m, a width of 5m and a height of 4m. The four walls and ceiling shields are made of single-layer shielding plates splicing, assembling and welding. The shielding system of the test hall should consider building decoration, electrotechnics, environmental protection, safety technology, HVAC purification technology, computer specialty, weak current control specialty, fire protection specialty, electromagnetic radiation and other comprehensive disciplinary factors.
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