S-M.D Series Buried Power Transformer
Product introduction
S-M·D series three-phase buried oil immersed transformer produced by the company is a kind of compact power distribution equipment which installs transformer, high-voltage load switch, fuse for protection in the same oil tank. The high-voltage and low-voltage incoming and outgoing lines adopt fully insulated, fully sealed and fully shielded waterproof joints, which do not occupy the surface space, can be immersed in water for a certain period of time, and are maintenance free. It can be widely used in densely populated central city, streets, highways, bridges, tunnels, parking lots, airports, ports, tourist attractions and other power distribution systems, especially for places with strict requirements on height and floor area.
In the product design, the special situation of ventilation and heat dissipation is fully considered, and the design of low loss and low temperature rise is adopted. According to the distribution mode, it can be divided into ring network distribution type and terminal distribution type to meet the different needs of users.
Model Meaning
Standards
GB/T 1094.1-2013 Power transformers - Part 1: General
GB/T 1094.2-2013 Power transformers - Part 2: Temperature rise for liquid-immersed transformers GB/T 1094.3-2017 Power transformers—Part 3:Insulation levels,dielectric tests and external clearances in air GB/T 1094.5-2008 Power transformers - Part 5: Ability to withstand short circuit
GB/T 1094.10-2003 Power transformers--Part 10: Determination of sound levels JB/T 10544-2018 Underground-typetransformers
IEC60076-1:2011 Power transformers - Part 1: General
IEC60076-2:2011 Power transformers - Part 2: Temperature rise for liquid-immersed transformers
IEC 60076-3:2013+AMD1:2018 Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air IEC 60076-5:2006 Power transformers - Part 5: Ability to withstand short circuit
IEC 60076-10:2016 Power transformers - Part 10: Determination of sound levels
Normal Environment conditions
1.The maximum operating ambient temperature is + 50 ℃ under natural ventilation, + 40 ℃ under forced ventilation, + 40 ℃ when the underground water depth does not exceed 1.5m, + 45 ℃ when the underground water depth exceeds 1.5m..
2.Altitude: No more than 1000m.
3.The power supply voltage's wave is similar to sine wave.
4.Three-phase power supply voltage is approximately symmetrical.
5.The total harmonic content of load current shall not exceed 5% of rated current;
Product characteristics
1.The product can be directly immersed in water or buried in underground tunnel, with protection grade of IP68.
2.High corrosion resistance stainless steel box, safe and reliable, maintenance free design.
3.All components are installed on the box shell to facilitate inspection and maintenance. High voltage side with back-up and plug-in fuse, to give the transformer more secure protection. Load switch can be terminal type or ring network type, suitable for a variety of power supply systems.
4.The core made of high permeability silicon steel sheet or amorphous alloy material has lower no-load loss.
5.The high and low voltage incoming and outgoing lines adopt fully insulated, fully sealed and fully shielded waterproof joints, which makes the operation safer.
6.It adopts buried transformer and billboard type low-voltage structure, which conforms to the urban ecological design concept, beautifies the environment and occupies a small area.
S □ -M·D Technical Parameter
