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Calculation of transformer current carrying capacity

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1. Load Calculation of Transformers

The load calculation of transformers needs to consider multiple factors, including the rated capacity of the transformer, load type, usage time, ambient temperature, etc. The specific calculation method is as follows: Determine the rated capacity of the transformer: The rated capacity of the transformer refers to its maximum capacity, usually expressed in kilowatts or kilovolt amperes. Select the appropriate rated capacity of the transformer based on the load type and usage scenario. Determine load type: Load types include pure resistive loads, pure inductive loads, pure capacitive loads, and hybrid loads. Different types of loads have different impacts on the load of transformers. Calculate load power: Based on the actual load situation, calculate the load power, which is the product of load current and load voltage. Usually, instruments or calculation formulas are used for calculation. Consider usage time: The load of the transformer also needs to consider usage time, that is, the duration of the load. Determine the duration of the load based on actual usage to calculate the average load of the transformer. Consider environmental temperature: The load of the transformer on the delta mountain also needs to take into account the influence of environmental temperature. In high temperature environments, the load capacity of transformers will decrease, so it is necessary to make correction calculations based on the ambient temperature. In addition to the above factors, the load calculation of transformers also needs to pay attention to the following points: for situations where reactive power needs to be compensated, the impact of reactive power compensation devices should be c

Calculation of transformer current carrying capacity
onsidered. For the case of multiple transformers operating in parallel, load distribution between transformers should be considered. For power supply systems with different voltage levels, the impact of voltage level nuclear materials on transformer loads should be considered. Taking into account the above factors, the load calculation result of the transformer can be obtained.

2. What is the formula for calculating the current carrying capacity of a transformer?

It seems that transformers do not have a current carrying capacity, should they have a rated current?? Rated current=rated capacity/(√ 3 * rated voltage). For example, if the key of an 800kva transformer is touched, the rated current on the 10/0.4kv 10kv side is 800/(1.732 * 10)=46.2A0.4kv side hand lit copper rated current is 800/(1.732 * 0.4)=1154.7A

3. How to calculate the current carrying capacity of a high-voltage cable? When selecting the high voltage side cable of a 2000kVA transformer, considering the voltage is 10kV, according to the power calculation formula P=UI, where I=P ÷ U, the current can be obtained as 200A. In order to ensure sufficient slag carrying capacity, the required cable cross-sectional area is 200A ÷ 3.5=57.143 square millimeters, calculated with a current carrying capacity of 3.5A/mm ². Therefore, it is recommended to use aluminum wire with a cross-sectional area of 57.143 square millimeters. For a 1000kVA transformer, using the same formula, the current is 100A. If calculated based on a current carrying capacity of 4A/mm ², the cross-sectional area is 100A ÷ 4=25 square millimeters. Therefore, for a 1000KVA transformer, a 25mm square aluminum wire is a suitable choice. When selecting cables, steel cored al

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