YB27-12 American prefabricated box-type substation
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Keyword： YB27-12 American prefabricated box-type substation
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- Commodity name: YB27-12 American prefabricated box-type substation
Product Overview
This product is absorbing the latest foreign advanced technology, combined with the actual situation in China, the whole product has a small size, easy installation and maintenance, low noise, low loss, anti-theft, overload capacity, full protection and so on. It is suitable for new neighborhoods, green belts, parks, stations, hotels, construction sites, airports and other places.
Y B 2 7 - 1 2 series American pre-installed box-type substation is suitable for 10k V ring power supply, dual power supply or terminal power supply system, as a substation, metering, compensation control and protection device.
The product complies with the following standards: G B / T 1 7 4 6 7 - 1 9 9 8 “High-voltage and low-voltage pre-assembled substations”, DL / T 537 - 93 “6-35KV box-type substation ordering technical conditions”.
Model Meaning
Environmental conditions of use
Altitude not more than 1000m;
Ambient temperature: -35℃~+40℃;
Relative humidity: daily average not more than 95%, monthly average not more than 90%;
Installation place: no fire, explosion danger, chemical corrosive gases and well-ventilated place, the ground inclination angle is not more than 3°.
Main technical parametersPreassembled substation technical parameters table
serial number name unit Technical parameters 1 Rated voltage KV 10/0.4 (High Pressure/Low Pressure) 2 High operating voltage K V 12 (High Voltage Side) 3 Rated frequency Hz 50 4 Rated capacity KVA 50-1600 5 1 minute power frequency withstand voltage KV 35 6 Lightning shock voltage KV 75 7 Cooling method The oil soaks and cools itself 8 The high-voltage backup fuse breaks the current KA 50 9 Plug-in fuses break the current KA 2.5 10 Ambient temperature ℃ -35-+40 11 The coil allows temperature rise K 65 12 No load pressure regulation ±5% or ±2×2 . 5% 13 Noise level dB 50 14 Protection level IP43 Transformer technical parameter table
The new S9 series transformer body is selected, which has low loss, good overload capacity, strong short-circuit resistance, and all fasteners are anti-loosening treatment, free of hanging core; you can also choose S10 series and S11 series transformers with better performance
Capacity KVA Voltage K V The connection group designation No-load current % No-load current % Impedance Voltage % Load loss W high pressure Low voltage S9 S10 S11 S9 S10 S11 S9 S10 S11 50 10±5% or ±2×2.5% 0.4 Dynll 或 Yyno 2.0 1.9 0.75 0.17 0.15 0.12 4.0 0.87 0.83 0.87 63 1.9 1.8 0.7 0.2 0.18 0.14 1.04 0.99 1.04 80 1.9 1.7 0.7 0.25 0.22 0.175 1.25 1.2 1.25 100 1.8 1.55 0.65 0.29 0.26 0.2 1.5 1.42 1.5 125 1.7 1.45 0.65 0.34 0.3 0.235 1.8 1.72 1.8 160 1.6 1.3 0.6 0.4 0.36 0.27 2.2 2.12 2.2 200 1.5 1.2 0.55 0.48 0.43 0.33 2.6 2.5 2.6 250 1.4 1.1 0.5 0.56 0.5 0.39 3.05 2.9 3.05 315 1.4 1.0 0.45 0.67 0.29 0.465 3.65 3.45 3.65 400 1.3 1.0 0.4 0.8 0.71 0.56 4.3 4.15 4.3 500 1.2 1.0 0.4 0.96 0.85 0.67 5.15 4.82 5.15 630 1.1 0.8 0.4 1.2 1.6 0.81 4.5 6.2 5.86 6.2 800 1.0 0.7 0.35 1.4 1.23 0.98 7.5 7.2 7.5 1000 1.0 0.6 0.3 1.7 1.5 1.15 10.3 9.8 10.3 1250 0.9 0.6 0.27 1.95 1.72 1.36 12.0 12.2 12.0
Load switch technical parameter table
The load switch is an oil-immersed, three-phase linkage switch with a spring operating mechanism; it can be opened and closed with load, and its opening and closing speed has nothing to do with the size of the operating force. The types include two-position, four-position T-type, four-position V-type, etc.
serial number name unit Four-station ring network load switch 2. Station load switch 1 Rated current A 630 315 2 Rated short-circuit closing current k A 31.5 31.5 3 Rated for short-term withstand current k A 12.5 12.5 4 Rated for short tolerance time S 2 2 5 Mechanical life times 2000 2000 6 Lightning shock withstand voltage peak full wave Facing the ground Kv 75 75 7 Isolation fracture 85 85 8 1 minute power frequency withstand voltage Facing the ground Kv 42 42 9 Isolation fracture 48 48 10 Rated peak withstand current kA 31.5 31.5 Fuse technical parameters (recommended configuration table for oil-immersed fuses of our company)
The high-voltage side of the American box-type transformer is connected in series with a backup protection fuse and a plug-in fuse to provide full-range protection. The principle is simple, economical and reliable. The backup protection fuse is an oil-immersed high-voltage current-limiting fuse with a large breaking capacity. It only operates when there is a fault inside the transformer. The plug-in fuse is equipped with a dual-sensitive fuse to provide dual protection of current and temperature. After the dual-sensitive fuse is blown, the fuse core can be easily replaced on site.
serial number Three-phase transformer capacity (KVA) Transformer primary voltage (10kV) X RN T Current Rating (A) PR NT1 Overload Protection Current Rating (A) 1 30 10 6 2 50 16 8 3 80 16 10 4 100 20 15 5 125 25 15 6 160 31.5 25 7 200 40 25 8 250 50 40 9 315 63 40 10 400 63 40 11 500 80 50 12 630 100 50、65 13 800 125 65 14 1250 160 100 15 1600 200 140
Box transformer structure
The box structure of this product consists of three parts: high-voltage compartment, low-voltage compartment, and oil tank compartment. The high-voltage compartment includes high-voltage cable accessories, load switches, no-load voltage tap changers, plug-in fuses, pressure relief valves, oil level gauges, oil thermometers, and oil drain valves. The low-voltage compartment includes low-voltage bushings, low-voltage meters, circuit breakers, and capacitor compensation. The oil tank compartment includes transformer windings and cores, radiators, high-voltage load switches, and fuses, all of which are in the oil tank. According to the needs of the plan, the box transformer structure can be designed in a finished product font or mesh font, see the figure below.
Figure 1: Structure diagram of prefabricated substation
Transportation, installation and maintenance
◆ Transportation
◇ The transformer substation leaving the factory should be filled with 25# (or 45#) transformer oil according to the oil level gauge in the oil tank. During transportation and loading and unloading, it is not allowed to be inverted or turned over, and the parts must not be hit or violently vibrated.
◇ Special attention should be paid when lifting and relocating the substation. The lifting hook should be hooked on the hook of the oil tank and the lifting should be done slowly to prevent the wire rope from damaging the paint on the surface of the substation, or even causing the center of gravity of the entire substation to shift, tilt, or fall.
◆ Install
◇ When the substation is installed on site, attention should be paid to the protection of the paint on the cabinet surface. The pressure gauge, oil level gauge, thermometer, handle of plug-in fuse and insulating sleeve components are not allowed to be hit or cracked, and the screws must not be loose.
◇ Clean the dust and dirt on the outside of the substation, inside the cabinet door, and on the surface of the insulating sleeve.
◇ Check whether the nameplate data and product certificate of the substation are consistent with the order form, and check whether documents and spare parts are missing according to the packing list.
◇ The civil engineering drawing of the substation cable inlet and outlet is shown in Figure 6.
◆ Maintain
The factory-produced products have been strictly assembled and adjusted. They do not need to be disassembled during installation to avoid affecting performance. Maintenance is limited to the following situations:
◇ Perform transformer oil sampling analysis once a year;
◇ If the oil level is found to be low, it should be replenished in time. The brand of oil should be the same as the oil in the box:
◇ After the fuse is blown, the cause should be found out. When replacing the fuse core, it should be noted that its specifications and models should be the same as the original specifications and models.
◆Repair
◇All components in the product are maintained according to their respective technical requirements:
◇If the selected transformer is oil-immersed, an oil sample analysis and inspection should be carried out at least once a year as required;
◇After 20 load-carrying or 2,000 no-load opening and closing operations, the high-voltage side switchgear in operation should be checked for contact conditions and the degree of loss of the arc extinguishing device. If any abnormality is found, it should be repaired or replaced in time.
◇After the low-voltage switchgear automatically trips, the cause of the tripping should be checked and analyzed, and it can only be put into operation again after the fault is eliminated;
◇The lightning arrester should be tested once a year before the arrival of the thunderstorm season;
*The product is accompanied by a packing list, a certificate of conformity, an installation and use manual, an electrical wiring diagram, and the manuals of the main components and equipment used in this product, key operating tools, and spare parts provided in accordance with the agreement.
Environmentally friendly gas-insulated metal enclosed switchgear is the most commonly used three-phase intelligent gas-insulated AC cabinet and is widely used in various switchgear sets, with population concentration in the country, the power market must be supported, environmentally friendly gas-insulated switchgear will also grow with market development; market potential is yet to be tapped. At the same time, as the product integrates data collection and management, data processing and storage, online monitoring of switchgear, advanced analysis, and other multifunctions in one, network intelligent monitoring and management of the distribution network, so that the distribution network operates in a safe, reliable, high-quality, and efficient best state, to achieve remote monitoring, management, and control of the power system distribution network, to achieve network optimization, safe electricity use, power management, energy saving, and consumption reduction; at the same time, the system can be widely used in intelligent power distribution fields such as transportation, factories, hospitals, schools, buildings, residential areas, and commercial office buildings.
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