Short-circuit fault current in high-current generator simulated circuit



A high-current generator, also commonly known as a current booster or high-current test device, is a test equipment specifically designed to produce adjustable low-voltage, high-current outputs. It is widely used in power plants, substations, electrical equipment manufacturing plants, and various scientific research laboratories. Core Working Principle

The basic principle of a high-current generator is based on the law of electromagnetic induction, and it can be regarded as a special step-down transformer with variable turns ratio (i.e., a "current-boosting transformer").

Its core working process is as follows:

Input power supply: Typically connected to a 220V or 380V industrial frequency AC power source.

Voltage regulator adjustment: Through an autotransformer or thyristor voltage regulation, the voltage applied to the primary winding of the current-boosting transformer is smoothly varied.

Current boosting transformation: The secondary winding of the current-boosting transformer has very few turns (usually only one or a few turns). According to the formula I₁/I₂ ≈ N₂/N₁, when the secondary turns are much fewer than the primary, the secondary can output an extremely large current (ranging from hundreds of amperes to tens of thousands of amperes), while the output voltage is typically very low (from a few volts to tens of volts).