ELECTRIC, WITH AN EDGE
The current capacity of 10kV Distribution isolation transformers are:
10KVA, 20KVA, 30KVA, 50KVA, 80KVA, 100KVA, 125KVA, 160KVA, 200KVA, 250KVA, 315KVA, 400KVA, 500KVA, 630KVA, 800KVA, 1000KVA, 1250KVA, 1600KVA, 2000KVA, 2500KVA, 3150KVA
What is the maximum capacity of a 10kv transformer? What load can it withstand? 10kv transformer capacity grade and selection requirements.
There are 1250, 1600, 2000, 2500, 3150KVA. According to “JBT 2426-2004 Power Plant and Substation Three-phase Transformer Technical Parameters and Requirements”, the maximum 10KV transformer is: low-voltage side 0.4KV is 2500KVA, low-voltage side 6.3KV is 3150KVA .
In practice, due to technological progress, many manufacturers can now make larger capacity 10KV transformers, and the largest 10KV/6.3(3)KV transformer I know can achieve 10000KVA.
The voltage level is 220/35/10kv and the capacity is 120,000KVA. It is a three-phase three-winding on-load voltage-regulating oil-immersed transformer. Although there are also non-excitation voltage regulators, the voltage regulation effect is not good.
The 10kv isolation transformer model is: SSZ11-120000/220/35/10. But when you place an order, it should be based on actual production needs.
Specify the following parameters: 1. Connection group; 2. No-load loss; 3. No-load current; 4. Load loss; 5. Product information, short-circuit impedance; 6. Cooling method, etc., otherwise the manufacturer will not be able to produce conventionally. Must meet actual production needs.
Transformer (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).
In electrical equipment and wireless circuits, it is often used for voltage rise and fall, impedance matching, and safety isolation.
The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: distribution transformers, power transformers, hermetic transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, etc.
The current situation of transformer capacity selection: part of the 10kv isolation transformer capacity is selected too large, the transformer cannot be fully utilized, the efficiency and power factor are low, and the line loss is increased, which not only wastes investment, but also increases the monthly electricity expenditure; the other part is the transformer capacity If the selection is too small, the transformer will be overloaded and the final result will be to burn the transformer. Electrical Technology House
How to reasonably choose the size of the transformer capacity to achieve economical and reasonable operation should be considered from the following aspects: 10kv transformer capacity level and selection requirements
1. Find out the manufacturer’s development planning and production characteristics in recent years, and determine the increase and decrease of electrical equipment and the approximate time according to the development situation and seasonality of production, so as to determine whether to invest in large-capacity transformers at one time or increase in batches The number of transformers can be economically reasonable, or the number of transformers can be put in or stopped according to the season.
2. Many manufacturers have installed their own generators according to the needs of the nature of production. This requires that the capacity of the transformer should be reasonably selected according to the size of the user’s load and the demand capacity of the power generation equipment, and the matching should be reasonable.
3. The selection of transformer capacity should be based on the nature of each plant’s electricity consumption, and the rated power of various electrical equipment should be calculated separately (equipment with different natural power factors are counted separately) and then based on their respective simultaneous rates and efficiencies. , Calculate the power demand capacity.
Transformer capacity = + lighting load + other non-motor load × its simultaneous rate
Simultaneous rate refers to the percentage of the actual capacity of electrical equipment to the total rated capacity at the same time. (www.dgjs123.com) According to the calculation results and taking into account the future development room, choose a 10kv isolation transformer with a capacity close to the national standard series.
For special situations, if the instantaneous inrush current of some equipment is very large and the duration is very short, you can choose a transformer with appropriate capacity or special technical characteristics according to the short-term allowable overload characteristics of the transformer. In short, the capacity of the transformer should be selected scientifically according to the actual situation of the user.
Question: What is the capacity of a 10kv isolation transformer (how to write the calculation formula) Assuming that a 10kv transformer is marked with 10KVA, what principle is it calculated based on, and how much power can it provide?
The transformer capacity is a fixed value, and there is clear data on the transformer nameplate. It has nothing to do with 10KV or 35KV.
Is it related to 10KV? According to the “Power Engineering Design Manual”, the transformer capacity should be selected based on the calculated load. For a single transformer that supplies power to a stable load, the load rate is generally about 85%.
That is: β=S/Se
In the formula: S — calculated load capacity (kVA); Se — transformer capacity (kVA); β — load rate (usually 80% to 90%).
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