YB Series Prefabricated Substation (also known as Americansubstation, hereinafter referred to as the United States changed) is a modular transformers, high voltage by the electric part of the load switch and fuse protection devices, low-voltage part of the load by the power switch and fuse protection devices, low voltage distribution switch and other parts of the measurement andcombining the three sets of power distribution equipment, is theabsorption of foreign advanced technology, combined with the actual situation of research and development of a new type ofcomplete transformation and distribution equipment. As the U.S.becomes a small size, less investment, easy operation, quickinstallation, easy maintenance, etc., which in the domesticdistribution system is widely used, especially in urban and ruralpower grid construction and transformation is widely used inindustrial area, residential area , business center and high-rise buildings and other occasions.

In addition to individual components of this product meet the relevant standards, but also to meet the "GB/T17467-1998 high /low voltage prefabricated substation," the relevant provisions of thetechnical requirements for this product.

■ Process and product characteristics

2.1 compact structure, small size, only an equal volume of about one third of European box change;

2.2 complete and strong, able-depth load center, improve power quality, reduce line losses, reduce the transmission cycle;

2.3 fully insulated, hermetically sealed construction, environmentaladaptability, and can beautify the urban environment, reliable operation and low investment;

2.4 The use of S9 transformers, low loss, low temperature, strong overload capacity;

2.5 low loss, the performance level of 11, low noise, low temperature rise, resistance to sudden short-circuit capability,superior performance.

2.6 high-quality steel. Production of power distribution equipment, which greatly improved the ability of anti-corrosion products, to ensure that products do not rust for 30 years

2.7 Small size, small footprint and beautify the urban environment,location flexible, easy to install, can be maintenance-free

2.8 high-voltage parts: the use of a fully insulated high-pressureinlet and outlet terminals and cable accessories, high pressureinterval does not have any exposed live parts, with a safe and reliable operating characteristics; pressure double fuse protection,plug-in fuse with temperature, current double Min protection features, back-up fuse for transformer fault protection; the same time, with a complete view of the operating instruments, such aspressure gauges, pressure valve, oil level gauge, oil temperature meter, etc. All main components are imported.

2.9 Low-voltage parts: the installation of an integrated parametric test point measurement of voltage, current, active power, reactive power, temperature and other parameters; installation of automaticmeter reading device user, or can be wired by the carrier,automatically copy all of the transformers low users of electricity;install low-voltage distribution phase protection function can be detected phase, and shunt the user, to prevent non-phase runningharm; low voltage cabinet install the fan, according to the Auto-startheat temperature , 45 ℃ start, 40 ℃ return.

3.1 Altitude: on more than 1,000 meters;

3.2 ambient temperature: higher than +40 ℃, lower than -25 ℃;

Average daily temperature in more than 35 ℃;

The annual average temperature in more than 20 ℃;

3.3 on the wind speed exceeds 35m / s;

3.4 installation site without the risk of explosion, no chemicalcorrosion and severe vibration;

3.5 Cooling: air from the cold (AN).

■ product structure

Variational part of the United States and the transformer control cabinet parts, some of which transformer is hermetically sealedstructure, the insulating oil can choose high or normal oil-burningtwo. Part of the control cabinet is divided into high-pressurechamber and low pressure chamber, high-pressure chamberequipped with: high voltage cable plug, lightning, load switching operation handle, the handle switch-circuit decomposition, plug-infuse, pressure relief valves, thermometers, pressure gauges, oil level meter, fill plug, oil drain valve, in line with switch, no circuit tap,plug-in fuses etc, along immersed in the transformer coretransformer oil, high-voltage cables and transformers connected bycable connector when the elbow. Low-pressure side can grasp themain speaker of air circuit breakers, current transformers, and current total scale, ammeter and voltmeter, the output can beconfigured according to user needs and capacitancecompensation circuit device.

■ Equipment installation

Please refer to the corresponding size of 6.1 LMH engineering drawings;

6.2 box installed on the concrete pedestal on the change, LMHshould be sufficient to withstand the weight of the box;

6.3 concrete pedestal required level of surface roughness, caneven withstand the weight of box changes, the United Stateschanged the way the use of the fixed plate fixed on the pedestal;

6.4 Grounding row and cable holder in the form and size can make appropriate changes to the actual situation;

6.5 cable ditch surface drainage channels required to tilt a littleconstruction to avoid stagnant water;

Changes in the pedestal is 6.6 square outside the box 1m, oneinto a, ∠ 50X50X5 750mm long grounding of angle, the flat steelwith 40X4 and grounding solder composition grounding,grounding-line welding in the flat from a 40X4 the introduction ofhigh-pressure side of the base at the top to the ground connectionwith the tank shell. Grounding resistance should be consistent: R ≤ 4Ω.

■ use of several issues that need attention

7.1 American box changed as the load switch dip in oil, no obviousbreak point, maintenance, strengthening of protection measures

7.2 As the box becomes a maintenance-free design, maintenanceis not very convenient, so the choice of switching equipmentperformance comparison we should give priority to good, withgood performance, low-loss type, such as is now recommended to use the S11 core volume .

7.3 whether American or European box change cooling is notperfect, especially in the more serious areas of direct sunlight,temperature, impact molded case circuit breaker off, allowing thecircuit breaker can not be normal breaking load and short circuitcurrent, easy to lead failure, the cooling device is necessary, especially to changes in the basic box made ??of heat in the pool to increase the convection.

8.1 Product operation sites and special requirements;

8.2 provides product ordering pattern, order the figure should havewiring diagram, and should indicate the capacity of the transformer, the main component model specifications, power distribution and branch circuit capacity;

8.3 must be configured to automatically metering and reactivecompensation device should be configured to providemeasurement meter and transformer requirements specifiedcompensation capacitor capacity;

8.4 indicate the requirements of surface treatment products

8.5 Please specify when ordering combined transformer-type orring type terminal.

■ When ordering, please provide the following information:

> Box and change the type of transformer capacity;

> High-pressure equipment used at a program plan and electrical components and parameters;

> Technical requirements;> equipment operating environment;>other technical requirements;> Box change technical specifications;

■ Ordering Information:

1, ordering please specify the device type capacity, type, quantity,and provide feed-line and the room (or space) dimensions and other data

2, in some networks, the network operating voltage and nominal voltage vary widely, the purchaser shall provide the details to whomthe time of manufacture to allow the appropriate margin.

3, as required under the system of separate design type, the usershould be provided a system diagram of network parameters

4, the selection priority of data to be provided and can be optimized according to actual situation, if there are specialrequirements can be agreed upon with suppliers.

Note: If the user needs, the user can make the necessarymeasurement grid, and provide a complete solution ...

Guangxi Nanning GB. ELectrical complete Co., Ltd.product technology in this extensive professional source,performance is excellent, has accumulated a wealth of casemanagement, providing complete product solutions. Please provide the factory application of single-line diagram, the specificelectrical parameters, we will provide you with complete design, perfect service.