10KV distribution transformer capacity tester

Abstract

The invention relates to a capacity tester used in a 10 kV distribution transformer. A transformer can be set into a secondary winding short circuit; any two phases in a primary winding are added with voltage, and the capacity of the transformer can be measured by the dingle phase testing method. A voltage meter is connected with the loading terminal of a tested transformer in parallel; a current terminal is connected in series with a tested loop; and the low-voltage side of the tested transformer is short circuited. A central convertor is arranged to calculate and convert test data. The invention adopts a high-insulation and digitized form to form novel testing equipment with simple structure and unique thought. The invention adopts advanced electronic technology and simplifies and minimizes complicated equipment and makes the complicated equipment more practical. The experiments show that the capacity tester with reliable performance is operated simply and can well meet the requirement of the capacity testing of a 10 kV distribution transformer.

Description

technical field [0001] The invention relates to a transformer capacity tester, in particular to a 10 kV power distribution transformer capacity tester. Background technique [0002] At present, when my country's power system collects electricity charges, in addition to the charges measured by the metering device, subsidies for active power loss and reactive power loss are also added according to the transformer capacity. For larger users, they have to pay a one-time capacity increase fee when the transformer is put into operation. Therefore, testing the capacity of the transformer is an essential part of maintaining the economic interests of both the supplier and the user. [0003] Due to energy shortages and rising electricity prices, some users are driven by interests to replace transformer nameplates, use large-capacity transformers to charge small-capacity transformers, and avoid additional charges for leakage electricity; some users buy waste transformers to save inves...

AI Technical Summary

Problems solved by technology

[0003] Due to energy shortages and rising electricity prices, some users are driven by interests to replace transformer nameplates, use large-capacity transformers to charge small-capacity transformers, and avoid additional charges for leakage electricity; some users buy waste transformers to save investment, or use high-energy transformers as transformers. Energy-saving transformers, these behaviors have seriously damaged the economic interests of power supply companies, and brought hidden dangers to the safe operation of the power grid

[0004] However, the test methods we currently have can only carry out high-pressure indoor tests.

If an outdoor test is required, a crane and a three-phase large-capacity power supply must be used on site. The test cost is too high, which brings huge problems to the actual capacity of each power supply bureau.

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