What are the transformer models and specifications?
Writer： Hengfeng you electric Time：2023-04-20 views：times
Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. If you have seen the transformer, careful or careful people will know. There are many letters on the transformer. Are you curious about the meaning of the letters on the transformer? Transformers not only have these letters, but also the specifications and models of transformers. What specifications and models do transformers have? What does the letter on the transformer that Xiaobian just mentioned stand for? Xiao Bian, I'll take you to find out.
What is the model and specification of the transformer?
1. There are many types and specifications of transformers. Transformers of different specifications have different meanings. Dry type transformer, such as dry-type transformer, its model is scb10-1000kva / 10kV / 0.4kV, in which the meaning of dry-type transformer is that s represents three-phase transformer, if s represents D represents single-phase transformer. C indicates that the transformer winding is resin cast solid, i.e. dry-type transformer. B represents foil winding, B represents winding winding with R instead, l represents aluminum winding, Z represents on load voltage regulation, and copper represents non-standard. Expressed as design serial number, also known as technical serial number. 1000KVA represents the rated capacity of the transformer (1000 kVA). 10kV refers to the primary rated voltage and 0.4kV refers to the secondary rated voltage.
2. The common power transformer models in our life are usually composed of symbols representing phase number, cooling mode, voltage regulation mode, winding core and other materials, indicating transformer capacity, rated voltage and winding connection mode. For example, in the model of power transformer "sfsz9-31500 / 110", s represents three-phase, f represents air cooling, s represents three windings, Z represents on load voltage regulation, and 9 represents design serial number. The rated capacity of transformer is 31500kVA, 110 represents the rated voltage of primary side is 110kV.
3. Among the specifications and models of transformers, if they are divided according to the voltage level of transformers, the models of transformers can be divided into 1000kV, 750kV, 500kV, 330kV, 220kV, 110KV, 66kV, 35kV, 20kV, 10kV, 6kV, etc.
4. According to the insulation and heat dissipation medium of the transformer, the transformer can be divided into dry-type transformer and oil immersed transformer. The dry-type transformer can be divided into SCB epoxy resin cast dry-type transformer and SGB10 non packaged H-class insulated dry-type transformer. According to the iron core structural materials of the transformer, the transformer can be divided into silicon steel laminated transformer, silicon steel coil iron core transformer and amorphous alloy iron core transformer. According to the design energy-saving sequence of the transformer, the transformer includes SJ, S7, S9, S11, S13 and S15. The transformer can also be installed with phase division, single-phase transformer and three-phase transformer.
Meaning of transformer letters.
1: S - three phase; D - single phase.
2: S-three winding; E-double winding.
3: O-self coupling. Non self coupling F -.
4: Z - on load voltage regulation; W - voltage regulation without excitation.
5: O - oil insulation; G-sf6 insulation.
6: (internal cooling) n-natural circulation; F - forced circulation; D - forced pilot cycle.
7: (external cooling) a-air; W-water.
8: N - natural circulation; F - forced circulation. Front number - rated capacity (kVA). Rear digital - rated voltage (kV).
Model representation of power transformer:
Basic model + design serial number - rated capacity (kVA) high voltage side voltage.
For example, s7-31510 transformer is a three-phase copper core 10kV transformer with a capacity of 315KVA. The design serial number 7 is energy-saving.
Please explain the meaning of power transformer model, such as scr9-50010, s11-m-10010.
S-three phase c-casting (dry-type transformer) 9 (11) - Design serial number 500 (100) - capacity (kVA) 10 - rated voltage (kV) M-SEAL.
