Electronic Transformers: frequency power sensor is an electronic transformer, inverter power sensor through the voltage and current signals inputted AC sampling, and then enter the second instrument samples connected by transmission system with digital cable, fiber optic, etc. digital inputs secondary instrument sampled values ??of voltage and current for computing, you can get the voltage rms, current rms, fundamental voltage and fundamental current, voltage harmonics, harmonic current, active power, fundamental power, harmonic power and other parameters. [4] transformer voltage and current transformers are divided into two major categories of high-voltage transformer, its main role: once the system voltage, current, and accurate transmission of information related to the secondary side of the device; the primary system of high voltage large current into low voltage (standard value) on the secondary side, a small current (standard value), so that standardized measuring device, measuring instruments and relays, miniaturization, and reduces the need for secondary equipment insulation requirements; the two the primary and secondary systems and equipment once the system is well isolated from high-voltage equipment electrically, thus ensuring the safety of the secondary equipment and personal current transformers: the use of the transformer primary, secondary current is proportional to the characteristics of steel. It works, but also with the general transformer equivalent circuit the same, but its primary winding in series with the circuit under test is good Taizhou high voltage transformer Which? And rarely turns; secondary windings connected meter relay coil current low-impedance load, the approximate short circuit. Primary current (ie, the measured current) and secondary circuit current depends on the measured high-voltage transformer load Wenzhou Which is better? Regardless of the current transformer secondary load. Due to the secondary side is close to a short circuit, so the primary and secondary side voltage U1 and very small, very small excitation current I0. Current transformer operation, the secondary does not allow open. Because once open Jiaxing high voltage transformer Which is better? , Have become the primary current excitation current, flux and the secondary voltage much higher than normal and endanger the safety of persons and equipment. Therefore, the current transformer secondary circuit fuses must not take, do not allow it at runtime without removing the meter bypass, relays and other equipment. Current transformer wiring connected load by running their requirements OK. The most common wiring for single-phase, three-phase star and incomplete star. Jiaxing high voltage transformer Which is better? _ _ Huayi high voltage power transformers provided by Xian Huayi power plant. Xian Huayi power plant (www.xahy.com) strong, credible, in Xi'an high-voltage circuit breakers and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi power and you hand into the brilliant, for a better future!