On June 30, 2018, Shandong Taikai Instrument Transformer Co., Ltd provided 48 sets of LVQB-220 SF6 current transformers for 750 kV transmission and transformation project of Urumqi Power Supply Company of State Grid, which successfully completed the wiring of the density controller, and passed the site acceptance.

The density controller plays the role of indicating the operating pressure of the product on the site and facilitates the user to patrol the device. In the practical application, it has been well received from the user's consistent high praise.