Combined Substation or Combined Transformer
1.Product Overview
Combined substation (Pad mount transformer) is also known as American style box transformer and Pad mounted substation. It includes active part of transformer, HV load switches, fuses and other protection devices all immersed in insulating liquid that can reduce the size. It has advantages of compact structure, beautiful appearance, small size, easy installation, flexible, fully insulated，fully sealed structure, reliable, easy to operate and free maintenance. It is widely used in the urban power network residential area, high-rise building, industrial park, airport, station, school and so on, and is also suitable for urban power grid transformation.
2. Product Features
1) Compact structure, small size, easy installation and flexible.
2) Fully insulated, fully sealed structure, safe and reliable, maintenance-free, reliable protection of personal safety.
3) H.V side adopts double fuse protection, in which the plug-in fuse is the unika fuse (temperature, current), and the backup fuse is a current-limiting fuse, which reduces the operating cost.
4) HV incoming line adopts cable connector structure, all insulated, safe and reliable, and easy to operate;
5) Can be used for both Ring Main Unit and terminal system with quite convenient transformation, which improves the reliability of power supply.
6) The transformer is a three-phase three-limb or three-phase five-limb structure, and the iron core adopts step-lap technologies, which has low noise, low loss, and strong resistance to short circuit and overload.
7) To improve product quality, our company use special technology of vacuum drying and vacuum oil filling which used in 35kV transformer and be extended to 10kV transformers. It offers a strong guarantee for quality improvement.
8) The enclosure adopts antiseptic design and special spray painting as per the service condition. The enclosure is equipped with "three-anti" functions, that is anti-condensation, anti-salt fog and anti-mildew, which can meet the anti-corrosive requirement in high temperature and high humidity condition.
3. Operation environment
1) Altitude: ≤1000 meters.
2) Ambient temperature: Maximum +40ºC, Minimum -25ºC.
3) Relative humidity: ≤90% (+25 ºC).
4) Max. Outdoor wind speed 35m/s;
5) Max Ground ramp degree: ≤3°.
6) Seismic level: ≤0.3m/s2 at horizontal direction and ≤0.15m/s2 at vertical direction.
7) Installation environment: No obvious and heavy pollution, no explosive and corrosive gas and dust, with good air ventilation and no severe vibration and shock.
8) If the application environment is different from the above standard conditions, please contact for customized designs.
4. Type Selection Instruction
1) Metal enclosure and stainless steel enclosure could be customized.
2) Ring Main Unit or terminal type can be selected as per customer's requirements.
3) Customer can select 13 series, 18 series oil-immersed transformer and amorphous alloy transformer etc.
4) We have LV circuit general configuration, and can be changed as per customer's requirements.
5) Equipment capacitance compensation can be divided into intelligent capacitance and common capacitor. Capacity can be customized.
6) Equipment arrangement usually divided into coupled "F" type and "O"+ reversed "E” type. Special plan can be optimized as per customer's requirement.
