Transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance transformation, isolation, voltage regulation (magnetic saturation transformer) and so on. According to the application, it can be divided into: power transformer and special transformer (electric furnace change, rectification change, power frequency test transformer, voltage regulator, mine change, audio transformer, intermediate frequency transformer, High Frequency Transformer, impact transformer, instrument transformer, electronic transformer , reactors, transformers, etc.). Circuit symbols are often used as the beginning of a number. Example: T01, T201, etc.
The type of transformer is usually composed of the symbol indicating the number of phases, cooling method, voltage regulation method, winding core, and the transformer capacity, rated voltage, and winding connection.
Transformer model meaning:
The first letter: O is expressed as auto-coupling;
The second letter indicates the number of phases: S is three phases and D is single phase;
The third letter: indicates the cooling mode, F is oil-immersed air-cooled; J oil-immersed self-cooling; P forced oil circulation; 4th letter: indicates the number of windings, double windings are not marked; S is three windings; F is split winding The fifth letter: indicates that the wire material L is an aluminum wire, and the copper wire is not marked; the sixth letter: indicates that the pressure regulation mode Z is loaded, and no load is not marked;
Digital part: the first one represents the transformer capacity and the second one represents the transformer's voltage level. According to SJ-560/10, it should be a 3-phase oil immersed transformer with a cooling capacity of 560KVA and a voltage of 10KV.
1. SII-M-220KVA
S11-transformer model, 11 is the design serial number, energy-saving products. M-fully sealed.
220kVA- indicates the rated capacity of 220 kV ampere core non-excited pressure regulating oil immersed distribution transformer, 220KVA
Second, scr9-500/10, s11-m-100/10
S--three phase
C--casting (dry type transformer) 9(11)--design number 500(100)--capacity (KVA)
10--rated voltage (KV) m--closed r not checked
Third, power transformer model definition
The transformer model usually consists of material symbols such as phase number, cooling method, voltage regulation method, winding core, and transformer capacity, rated voltage, and winding connection. What is the meaning of the following power transformer model code?
DSJLZ SC SG JMB YD BK(C) DDG
D-single-phase S-three-phase J-oil immersed self-cooling L-winding for aluminum wire Z-loaded SC-phase epoxy resin casting
SG-three-phase dry self-cooling JMB-local lighting transformer YD-test single-phase transformer BF(C) - control transformer (C is C-type iron core structure DDG-single-phase dry low-voltage high-current transformer
Fourth, SFSZ9-31500/110
S: Three-phase F: Air-cooled S: Three-winding Z: On-load voltage regulation 9: Design No. 9
31500: Capacity is 31500kVA
110: Primary side rated voltage 110kV
Case: For example, S9-1000/10 The 0.4 you are referring to should be the low voltage side rated voltage is 0.4KV. The following are some related parameters of this type of transformer. Product model meaning: S9-1000/10S: three-phase (phase number) 9: design number 1000: rated capacity (kVA) 10: voltage level (kV) short-circuit impedance (%, 75 degrees) / high and low: 4 rated voltage and points Connection range (kV) / low voltage: 0.4 rated voltage and tap range (kV) / high voltage: 10 ± 5% rated capacity (MVA): 0.03 load loss (kW, 75 degrees) / high and low: 0.6 no-load current (%) : 2.1 No-load loss (kW): 0.13 Cooling method: ONAN connection group label: Y, yn0; D, yn11 Dimensions (length X width X height, mm): 315 temperature rise (K): 44 phase: 3 mass (kg): The 50 transformer model only shows the rated voltage of the high voltage coil and the low voltage coil, not showing the buck or boost.
How to distinguish between the model is a step-up or step-down transformer
Some netizens said that they can look at the nameplate or look at the wiring outside. The power supply side is the high voltage line and the load side is the low voltage line.
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