目前，我国电力系统收取电费时除了收取计量装置所计量的费用外，还要根据变压器容量加收有功损耗电量和无功损耗电量的补贴。对于较大用户在投运变压器时还要一次性交纳增容费。因此，对变压器的容量进行测试是维护供用双方经济利益必不可少的重要环节。由于能源短缺，电价攀升，有些用户受利益驱使更换变压器铭牌，以大容量变压器充小容量变压器，逃漏电量补加费用。
At present, China's power system collects electricity charges in addition to the fees metered by metering devices, but also according to the transformer capacity to add active power consumption and reactive power consumption subsidies. For larger users, it is also necessary to pay a one-time increase in the cost of commissioning transformers. Therefore, the test of transformer capacity is an essential part to maintain the economic interests of both suppliers and users. Due to energy shortage and rising electricity prices, some users are driven by the interests of replacing transformer nameplates, using large-capacity transformers to charge small-capacity transformers, to evade the additional cost of electricity leakage.
变压器容量测试仪逐渐成为用电稽查人员真正的好助手，它体积小、重量轻，采用一体化设计，便于携带和野外作业。是专门用于在低电压、小电流情况下测试标准配电、电力变压器容量的仪器。
Transformer capacity tester has gradually become a real good assistant for electricity inspectors. It is small, light weight, integrated design, easy to carry and field operations. It is a special instrument for testing the capacity of standard distribution and power transformer under the condition of low voltage and low current.
该仪器电路设计精巧，思路独特，性能优越，功能强大，完全满足现场配电电力变压器容量测试的要求。操作简单，接线方便，数据准确可靠，解决了配电变压器容量测试的难题，并可显示、打印用户关心的测量数据。使用该仪器可大大提高工作效率，减轻劳动强度。
The instrument has the advantages of exquisite circuit design, unique thinking, superior performance and powerful function, which fully meets the requirements of on-site distribution power transformer capacity test. It has the advantages of simple operation, convenient wiring, accurate and reliable data. It solves the difficult problem of capacity test of distribution transformer and can display and print the measured data concerned by users. Using this instrument can greatly improve work efficiency and reduce labor intensity.