Features: A: AC constant current source is designed for the manufacture of low-voltage electrical users, and its output current is constant, pure sine wave output waveform can be used as an overcurrent detection laboratory instruments. II: The AC current source can be with resistive, inductive, capacitive load, low-voltage electrical testing to meet the power requirements. Three: outstanding advantages, steady flow of high precision, according to the user environment, 1%, 0.8%, 0.5%, 0.3% level. Ensure that the output current is constant. Solution previously used current generator due to a temperature change, the wires, connectors and the like coil copper resistance has been changed, four: the operator shall always be adjusted to a constant current regulator, time-consuming effort, and is not the accuracy of the power supply Compared to the low-voltage electrical production, subject to the current parity, the aging of the project, the use of this power supply is the best choice, such as tuning, hot hot air switch relay tripping current measuring currents and so on. Five: can be different from the current level of automated testing (items: voltage, current, frequency, rise and fall times, to cycle test operation) Six: Adjustable Frequency range :40-500HZ (optional), fixed output: 50HZ, 60HZ (more the multi-range fixed output frequency can be designed according to user needs) Seven: the user can set the analog (signal) to control the company website: http://www.hengliudianyuan.com