Voltage transformer with an iron core transformer. It mainly consists of a secondary coil, core and insulation components. When a voltage is applied to the winding of a transformer U1 when fully enclosed, in the core generates a magnetic flux φ, according to the law of electromagnetic induction in the secondary winding generates a secondary voltage U2. Change the primary or secondary winding turns, can produce different primary voltage and secondary voltage ratio, which can be composed of different ratio of the voltage transformer. Voltage transformer converts the high voltage proportional to the low voltage, that is 100V, voltage transformer primary side connected to the transformer primary system, secondary flanked measuring instruments, relay protection; mainly an electromagnetic (capacitive voltage transformer is widely used), while the non-high-voltage electromagnetic transformer, such as electronic, photoelectric. Voltage transformer: Measuring current transformer with primary and measurement instruments, in line normal operating conditions, to measure current, voltage, power, etc. Measuring micro-current transformer main requirements: 1, insulation and reliable; 2, sufficiently high accuracy; 3, when a large current measured line failure occurs when the transformer should be saturated (such as 500% within the appropriate range of rated current) to protect the measuring instruments. Protecting the current transformer and relay device with the main current transformer, when the line short-circuit or overload fault voltage transformers, the relay means to provide a signal cut off the fault circuit to protect the safety of the power supply system. Protection with micro-current transformer operating conditions and measuring transformers completely different protection transformers just beginning work effectively when current is several times larger than normal several times the current. Transformer price Huayi Electric Power (online consultation), Taiyuan, Xi'an transformers supplied by Huayi 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.