If the rectified power supply for bright acid copper plating does not meet certain requirements, the copper plating layer will not achieve good light leveling and a wide range. Experience shows that when silicon rectifiers are used, it is best to use six-phase double-starburst rectification with balanced reactors. The waveforms are good and relatively power-saving; when using silicon-controlled rectifiers, it is better to use five-pillar cores and twelve phases. Rectifier and smoothing reactor. General three-phase full-wave or bridge-type silicon rectifiers are barely available, but the effect is not good. Three-phase full-wave or bridge thyristor rectifiers are barely available when the load factor is more than 80% (for example, a 500A rectifier must be open to more than 400A). When a well-formed rectifier causes three-phase phase loss due to power supply or internal faults, or when the thyristor and silicon rectifier components are damaged, the rectified output waveform is greatly degraded. If the normal copper plating solution suddenly fails or if several identical plating tanks use the same rectifier, one of which is always less effective than the other, it should be considered whether or not the rectifier is defective. It is best to use an oscilloscope to check the DC output waveform. You can also use a clamp ammeter to determine the operating current of each rectifier element. The relative error should not be greater than 15%. If a component has no current or excessive current, it should be checked for damage.