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40.5kv-1250A Sf6 Gas Insulated Switchgear Gis Rmu¹

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Product Description General IntruductionThe 40.5kV-1250A fully enclosed and fully insulated SF6 inflatable ring main unit introduces advanced foreign technology and adopts a modular design, with its perfect unity of fixed type and flexible expansion. SF-40.5 inflatable switch cabinet has the characteristics of compact structure, fully insulated, long life, maintenance-free, small footprint, complete solutions, strong scalability, high safety factor, and not affected by the environment.It can be widely used in industrial, civil ring networks and terminal power supply networks. It is especially suitable for small secondary power distribution stations, switching stations, industrial and mining enterprises, airports, railways, highways, subways, commercial districts, living quarters, wind energy, photovoltaics and other fields. The switch cabinet is fully enclosed, maintenance-free, small in size, excellent in performance, safe and reliable, long in life and maintenance-free, and is very popular among users.Product FeaturesModular design, each unit module can be combined and expanded arbitrarily without the need for inflation and deflation, which facilitates solution combination and high-pressure metering design, and has a wide range of adaptability. SF6 fully insulated circuit breaker inlet and outlet cabinets (vacuum arc extinguishing), load switch inlet and outlet cabinets, bus tie cabinets, metering cabinets, load switch-fuse combination electrical cabinets, and TV cabinets (with or without switches) combination solutions are available Divided into single unit, two units, three units, four units and other compact combinations, it provides broad application prospects for SF6 fully insulated ring network cabinets or multi-circuit distribution cabinets.The cabinet adopts an armored structure. There are metal partitions between the busbar room and the switch room, and between the switch cabinet and the cable room. The protection level of the primary part of the fully insulated structure can reach IP67. The air tightness is very good, the air consumption is small, and it can guarantee no air leakage for 30 years. The operating mechanism is made of corrosion-resistant metal, and the bearings of the rotating parts are all self-lubricating designs. The product is not affected by the environment, does not require regular maintenance, and is connected to the outside world. Convenient, this results in low operating power, high reliability and longer life. The extension bus uses plug-in silicone connectors, which are fully insulated and shielded to ensure conductive reliability and are not affected by the surrounding environment. The combination connection and expansion are convenient, which facilitates future capacity expansion and transformation of users or substations.Product AdvantagesApplication in plateau areas: SF6 gas, full insulation characteristics, no need to consider the influence of pressure difference inside and outside the gas box.Unit assembly: convenient for user expansion, plan changes and circuit exchanges.Distribution network automation application: It can cooperate with all automation terminals on the market to easily realize distribution network automation.Application in coastal areas: The mechanism is fully sealed and has long-term anti-salt spray anti-corrosion treatment to ensure the safe operation of the equipment for a long time.Application in areas with strong wind and sand: The mechanism is sealed, the primary circuit and the busbar are fully sealed, and the control circuit adopts automotive-specific sealing strips to ensure long-term safe operation in areas with strong wind and sand.The units can be freely combined to realize different solutions.Cabinet StructureThe inflatable compartment is made of 3~5mm thick stainless steel plate, which is welded by a welding robot after being processed by CNC machine tools. It has less welding deformation and good air tightness. The remaining compartments are made of high-quality cold-rolled steel plates, which are welded after CNC bending. It has the characteristics of high precision and good strength; each functional unit is an independent module, which is extremely convenient to assemble. Each sealed compartment of the cabinet is equipped with an independent pressure relief channel to maximize personal safety and equipment operation.Lower Isolation Circuit BreakerLower Isolation Gas TankLower Isolation Circuit Breaker SizeCabinet SizeUsage Environment and ConditionsAir temperature: maximum temperature: +40oC, minimum temperature: -20oC.Temperature: The monthly average temperature is 95%, and the daily average temperature is 90%.Altitude: Maximum installation height: 2500 meters.No flammable, explosive, serious pollution, chemical corrosion or severe vibration.When the installation altitude exceeds 2500 meters, or there are other special conditions, please contact pre-sales technology.Installation InstructionsClean the air box and treat the sealing surface before use: wipe the air box with alcohol, fine sandpaper, and clean cloth before installation and use.Inspect the sealing surface of the box. There should be no scratches, burrs, welding slag, iron filings and other foreign matter penetrating the sealing belt. Mainly check the following locations: around the casing installation hole, around the dynamic seal installation, around the explosion-proof valve installation. Barometer mounting hole.The verticality of the welded stud is good, the welding spots around the root of the stud are even, without deflection, the thread is smooth, and the size specifications meet the drawing requirements.The dynamic fit can fit the sealing surface before tightening.The valve seat of the air pressure gauge is welded accurately, the internal threads are not damaged, and the welding is stable.The shell grounding seat is welded accurately, the internal threads are not damaged, and the welding is stable.Check that the outer dimensions of the cabinet meet the drawing requirements, and that the top expansion method is consistent with the specification drawing.The diagonal error of the cabinet is less than 3mm.The boxes that pass the inspection will be stamped and signed on the corresponding production process card and installed on the bracket to stand up.Gas Tank Internal Installation DiagramCircuit Breaker Installation Inspection Points and Precautions:Before installing the switch, the switch must be inspected to ensure that there is no damage on the surface of the switch.Install the switch into the sheet metal, and fix the switch body with nuts (don't tighten the nuts for now, and then tighten the movable fitting). Make sure that the switch accurately corresponds to the metal hole, and then assemble the movable fitting.After the dynamic fit and switch are fixed and installed, pull the movable fit by hand to operate the isolation knife. The movement is smooth and without jamming, and there is no deformation of the knife.The Following Picture Shows the Installation of the Isolating Circuit Breaker:The Following Pictures are Interlocking Details:Operation and Maintenance1 , Operating Conditions.SF6-40.5kV/1250A generally operates/serves under normal indoor conditions and complies with IEC 62271-1 and GB3906. The specific conditions are as follows.a. Ambient temperature: maximum temperature +40oC; 24-hour average maximum temperature +35oC; minimum temperature -40oC.b. Humidity: The maximum average relative humidity measured in 24 hours is 95%; the maximum average relative humidity measured in 1 month is 90%.c. The maximum installation altitude is 2500 meters without reducing the gas pressure. When the installation altitude exceeds 2500 meters, please contact pre-sales technology.d. Special conditions: Operation must comply with the requirements of IEC62271-1 and GB3906 standards. For special operating conditions, the end user and the manufacturer must reach an agreement. If special harsh operating environments are involved, the manufacturer must be consulted. For example, when electrical equipment is installed at an altitude above 2,500 meters, the atmospheric pressure will decrease, causing the air box to bulge.2, Product Maintenance.a, All components inside are maintenance-free during the declared product life.b. The isolation and grounding positions can be observed to provide safety guarantee for operation and cable construction.c. The system loop is completely isolated from the atmosphere, and a special arc pressure relief channel is designed on the air box to ensure the safety of operators and equipment.d. The mechanical part is located outside the air box and behind the front panel. This makes operation and replacement easier. The surface of the mechanical parts has undergone anti-corrosion treatment. Its movable parts have been lubricated before leaving the factory, which can meet the use of the product life cycle. In extreme environments (dust, sand and dirt) inspection, maintenance and, in some cases, replacement may be necessary.Special CustomizationThe above parameters are typical data; if the existing styles do not meet your specific demands, please contact us for a custom design.We have significant personalized customization development and production skills, allowing us to provide tailored solutions to customers all over the world.

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