江蘇春晨電纜有限公司生產電機引接線 高壓電機引接線，電力變壓器是供電系統中的關鍵設備，其主要功能是升壓或降壓以利于電能的合理輸送、分配和使用，對變電所主接線的形式及其可靠與經濟有著重要影響。所以，正確合理地選擇變壓器的類型、臺數和容量，是主接線設計中一個主要問題。

The power transformer is the key equipment in the power supply system. Its main function is to step up or step down to facilitate the reasonable transmission, distribution and use of electric energy, which has an important impact on the form of main wiring and its reliability and economy. Therefore, choosing the type, number and capacity of transformer correctly and reasonably is a main problem in the design of main wiring.

如何選擇變壓器？

How to choose transformer?

選用配電變壓器時，如果把容量選擇過大，就會形成“大馬拉小車”的現象。不僅增加了設備投資，而且還會使變壓器長期處于空載狀態，使無功損失增加。

When selecting distribution transformer, if the capacity is too large, the phenomenon of "big horse pulling small car" will be formed. It not only increases the equipment investment, but also makes the transformer in no-load state for a long time, which increases the reactive power loss.

如果變壓器容量選擇過小，將會使變壓器長期處與過負荷狀態。易燒毀變壓器。依據“小容量，密布點”的原則，配電變壓器應盡量位于負荷中心，供電半徑不超過0.5千米。

If the capacity of the transformer is too small, the transformer will be in overload state for a long time. It is easy to burn down the transformer. According to the principle of "small capacity, dense points", the distribution transformer shall be located in the load center as far as possible, and the power supply radius shall not exceed 0.5km.

配電變壓器的負載率在0.5～0.6之間效率最高，此時變壓器的容量稱為經濟容量。如果負載比較穩定，連續生產的情況可按經濟容量選擇變壓器容量。

The load rate of distribution transformer is the highest between 0.5 and 0.6. At this time, the capacity of transformer is called economic capacity. If the load is relatively stable, the transformer capacity can be selected according to the economic capacity in the case of continuous production.