Steady flow source, constant current source, alternating current source, a DC current source, current generator, current generator, also known as a current source, steady flow source is a broadband spectrum, high-precision AC stabilized power supply is the use of IGBT faction wave FM mode of production, with fast response, high precision constant current, long-term stability for a variety of nature of the load (resistive, inductive, capacitive) and so on. Primarily used to detect thermal relays, molded case circuit breakers, small crowbar and need to set the rated current, operating current, short circuit protection, such as the production of the current situation, the power supply output current is adjustable from zero to the rated output current is large also divided into files, allowing the use of open load in series with the AC current source and current source and current stability: 0.5%, 1A-10000A (customizable 0-100.0mA ,0-50 .0 mA ,0-19 .99 mA according to customer requirements, 500mA-5000A) The utility model provides an electromagnetic AC constant current source, current source of its main route back in series capacitors and current transformers, mains (220V 50hz) the direct supply, simple structure, reliable operation, maintenance easy, and can achieve high current, multi-scale, multi-standard design, the current source technical indicators meet the national standard, applicable to place a low resistive load, especially household electrical inspection and testing. AC current source, current source factory also produces non-standard AC current source and a constant current source, for example, low-voltage electrical factory for the production of plant design and production of high-precision high-current AC and DC constant current power supply, is the new hot Quick check station must relay equipment; alternating current power supply instead of the original source of alternating current from the AC power supply, voltage regulators, high-current converter consists of three devices to overcome the original program can not be solved copper resistance temperature l drift currents caused by shortcomings and improve the steady flow accuracy, speed up the response speed calibration by the user's approval. Constant current source, alternating current source delay is mainly used in low-voltage electrical industry, a variety of thermal circuit breakers, thermal relays, motor starters and other low-voltage electrical products, tripping tests for verification and testing. Constant current source characteristic low-voltage electrical industry product testing in a wide range of applications quickly. The device is stable and reliable, high output current accuracy, the current waveform distortion, work no pollution, no noise, and is fully able to overcome the current variations due to voltage fluctuations, changes in loop resistance, resistance changes caused by the product, not human factors, a good man-machine interface, with advanced production lines supporting the use of the system can also be used alone. Constant current source, constant current power supply AC is specifically designed and manufactured for the user, the output current is constant and can be continuously adjusted, a feeling of use to the user as in a DC constant current power supply. The output waveform is a sine wave, pets resistive, inductive, capacitive load, low-voltage electrical testing to meet the power requirements of the conventional AC power supply with a voltage regulator, coupled inverter compared to the power a device can achieve the object, there is a prominent advantage, which is constant current. Because the original plan due to temperature changes, wire, fittings and copper coil resistance, etc. have been changed, the operator must often adjust to the constant current regulator, time-consuming effort, but accuracy can not be compared with the power, low-voltage electrical production , the subject of the current parity, the aging of the project, using AC current source is the best choice, such as tuning, hot hot air switch relay tripping current measuring currents and so on. The factory can also produce other than the user-frequency and high-frequency AC current source, for example, 60Hz, 400Hz, but also can be a triangle wave, sawtooth and so on. Constant current source works are: constant current source with a high-frequency pulse width modulation SPWM way to simulate linear reactors in series with the inverter control circuit for the combined linear resistive circuits and digital circuits. The use of imported high rms converter output current into a DC voltage signal, compared with the precision reference voltage, high-precision op amp PI regulator, controlling the main back Luo impedance, constant current to achieve the purpose of power Switch imported IGBT module with high efficiency, no noise, wave good advantage, in use, allowing the load suddenly open or short circuit, line and fast calibration station were particularly easy to use. The main technical parameters of the constant current source: current precision: ≤ 0,05%; Output waveforms: sine wave; (THD ≤ 1.5%) Output Current: 0 - Rating adjustable; (sub-file switch can be set coarse , plus fine) Current rating: 5A, 10A, 20A, 30A, 50A, 100A, 200A, 300A, 500A, 1000A, 1500A, 2000A, 3000A, 5000A, 10000A (can be customized); voltage rating: 10V , 20V, 30V, 50V, 100V, 200V, 400V (can be customized); output indication: LED digital display; (RMS) Input Power: AC220V ± 10% 50Hz, 10KW above the input voltage must be connected to AC380V ; time: long hours. Environment :0-35 ℃, humidity ≤ 85%