In AC circuits, transformers used to convert high voltage to a low voltage, high current into a small current, thereafter for measurement, control and protection. This will not only increase the measuring instrument from the process, to facilitate standardized instrument to reduce control, protection of voltage and current of the device, and the instrument and equipment or high-voltage circuit separated zero sequence current transformer, ensure the safety instruments, equipment and staff. Different variable ratio current transformer. This type of current transformers having the same core and the primary winding and the secondary winding turns is divided into two distinct, separate windings, to meet with different ratios, different accuracy classes require the same load currents transformer factory direct, for example, under the same load, in order to ensure accurate measurement of power required becomes relatively smaller (to meet the load current at a nominal value of about 2/3) transformers, high accuracy class number (eg 1K1. 1K2 200 / 5.0.2 level); and electrical equipment, relay opening transformer, taking into account the protection factor of the fault current is large, the requirement becomes relatively large number may be slightly lower accuracy classes (eg 2K1 .2K2 300 / 5.1) transformer factory outlets | Huayi Electric Power (certified) | Zhengzhou, Xi'an, instrument transformers supplied by the power plant. Xian Huayi Electric Power Equipment Factory (www.xahy.com) is a leader in Xi'an high-voltage circuit breakers, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Huayi Electric Power leadership with the staff warmly welcome all inquiries negotiations to create Huayi electricity better future.