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工频高压试验变压器的传统结构:单心柱壳式铁心,线圈套在中间心柱上,其中低压线圈在里层,高压线圈在外层,高压线圈一端A经高压套管引出,另一端X与铁心、箱壳一起接地。器身外面是铁壳油箱——此种结构为铁壳式,见图1。另有一种新型结构:在横卧的心式铁心上,分别套上上、下线包各一个,线包内层为平衡线圈,外层为高压线圈,低压线圈则套在下线包的最外层。上下线包的平衡线圈匝数相等,并联连接(接点接铁心),以减少由于两柱安匝不平衡而引起的漏磁。上下线包的高压线圈匝数相等,串联连接,中点(半压)接铁心,铁心悬空(不接地),上线包外层出头A
The traditional structure of the power frequency high voltage test transformer: single-core columnar core, the coil cover the central column, in which the low-voltage coil in the inner layer, the high-voltage coil in the outer layer, high-voltage coil one end of the high voltage bushing leads to the other end X Core, shell together grounded. Outside the body is a steel tank - this structure is a steel shell, see Figure 1. Another new structure: in the lying heart-shaped core, respectively, put on the line, a package, the inner package for the balance coil, the outer layer of high-voltage coil, the low-voltage coil is set in the outermost package Floor. The upper and lower package equalization coil turns equal number of parallel connection (contact then iron core), in order to reduce the imbalance caused by the two ampere turns of the magnetic flux leakage. Upper and lower package of high-voltage coil turns equal to the number of series connection, the mid-point (half-pressure) then iron core, the core dangling (not grounded), the package on the outer A