Rectifier transformers are combined with a diode or thyristor rectifier. The applications range from very large aluminum electrolysis to various small and medium size operations. The transformers may have a built-in or separate voltage regulation unit for direct output regulation of diode rectifiers , and correspondingly a power factor improvement with a thyristor rectifiers.
 
Features:

1)    Low loss
2)    Low noise
3)    High efficiency
4)    Low partial discharge
5)    Strong mechanical strength and short-circuit withstand ability .
6)    Operation reliability
7)    Easy maintenance 
8)    Pretty outline and compact structure
9)    100% guaranteed no leakage
Brief specification
1)    Voltage class: 6~110 KV
2)    Capacity : 400KVA to 120,000 KVA
3)    Short-circuit impedance : 4.5~21%
Losses: No-load losses is fully comply with IEC standard requirements
Application:
1)    Aluminum smelting
2)    Magnesium smelting
3)    Copper smelting
4)    Zinc smelting
5)    The largest installations are those for aluminum electrolysis with several transformer/rectifier units in parallel operation to achieve the required DC current, in all cases the rectifier can be with diodes or thyristors.