1. Meaning of transformer model letters
The 1 letter: O represents auto-coupling.
The 2 letter indicates the number of phases: S is three phases, span>D is single phase.
The 3 letter: indicates the cooling method, F is oil immersed air cooling ; JOil-immersed self-cooling; P Forced oil circulation.
The 4 letter: indicates the number of windings, double windings are not marked; S means three windings ;F is split winding.
The 5 letter: indicates the wire material L is aluminum wire, copper wire Not standard.
The 6 letter: indicates the voltage regulation method Z loaded, unloaded Not standard.
Number part: The first one indicates the transformer capacity, and the second one indicates the voltage level of the transformer.
According to SJ-560/10, it should be 3 phase oil immersion. A transformer with a cooling capacity of 560KVA and a voltage of 10KV.
2. Examples of the meanings of transformer model lettersFor example
For example, SII-M-220KVA
S11-Transformer model,11 is the design serial number, energy-saving product.
M-Fully sealed.
220kVA- means the rated capacity is 220kilovolt ampere
Stacked core non-excitation voltage-regulating oil-immersed distribution transformer, 220KVA
For example, scr9-500/10, s11-m-100/10
S–Three-phase
C–Pouring molding (Dry-type transformer)
9(11)–Design serial number
500(100)–Capacity(KVA)
10–Rated voltage(KV)
m–Sealed
For example, DSJLZSCSGJMBYDBK(C)DDG
D-Single-phaseS-Three-phaseJ-Oil-immersed self-coolingL –The winding is aluminum wireZ-It also carries voltage regulationSC-Three-phase Epoxy resin casting
SG-Three-phase dry self-coolingJMB-Local lighting transformerYD-Single-phase transformer for testingBF(C)-Control transformer(C is of type CIron core structureDDG-Single-phase dry low-voltage high-current transformer
For example, SFSZ9-31500/110 span>
S: three-phase
F: air-cooled
S: three-winding
Z: on-load voltage regulation
p>
9: Design serial number9Type
31500: The capacity is31500kVA
110：Primary rated voltage110kV
3. What are the specifications and models of transformers
1. According to voltage level: 1000KV, 750KV, 500KV, 330KV, 220KV, 110KV, 66KV, 35KV, 20KV, 10KV, 6KV, etc.
2. According to the insulation and heat dissipation medium: dry-type transformers, oil-immersed transformers. Dry-type transformers are further divided into: SCB epoxy resin cast dry-type transformers and SGB10 non-encapsulated H-class insulated dry-type transformers. transformer.
3. According to the core structure material: silicon steel laminated transformer, silicon steel coil core transformer, amorphous alloy iron core transformer.
4. According to the design energy-saving sequence: SJ, S7, S9, S11, S13, S15.
5. Divided according to the number of phases: single-phase transformer, three-phase transformer.
6. In terms of capacity, the rated capacity of my country’s current transformers is calculated according to the R10 priority coefficient, that is, calculated as a multiple of 10 raised to the power of 10, 50KVA, 80KVA, 100KVA, 125KVA, 160KVA, 200KVA, 250KVA, 315KVA, 400KVA, 500KVA, 630KVA, 800KVA, 1000KVA, 1250KVA, 1600KVA, 2000KVA, 2500KVA, 3150KVA, 4000KVA, 5000KVA, etc.
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