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Rectifiers for Aluminum Smelters

DC Power Supplies for Aluminum Smelters


Typical Potline Power Supply Configuration


CriteriaRatings
Primary voltage supply:up to 230 kV
Unit DC-current:50 ... 95 kA
Number of units in parallel:4 ... 6
DC-voltage:up to 1500 V
Potline DC-current:100 ... 350kA
Type of semiconductor:Diode or Thyristor
Rectifier connection:Bridge connection
Pulse number per unit:typ. 12 pulse
Total pulse number:48 ... 72 pulse
DC-current Ccontrol:
- Coarse OLTC / NLTC
- Fine saturable reactors / thyristor firing angle
Regulation accuracy:constant current / ± 1%
Power Factor at rated load:> 0.9 (without compensation)
Control:digital / fully automated
Control mode possibilities:unit, group,
MicroScada(HMI)
Rectifier cooling media:de-mineralized water (air)
Ambient conditions:- 40°C ... + 55°C
Installation:Indoor or Outdoor


Typical Potline Booster Configuration

CriteriaRatings
Primary voltage supply:up to 30 kV
Unit DC-rating:25 ... 60kA
Number of units in parallel1 ... 2
DC-voltage on potline section:25 ... 60 V
Type of semiconductor: Thyristor
Rectifier connection:Bridge or Single way
Pulse number per unit:typ. 6 pulse
DC-current control:Thyristor firing angle
Regulation / accuracy:constant current / ± 1%
Control:digital / fully automated
Control mode possibilities:unit, group,
MicroScada(HMI)
Rectifier cooling media:de-mineralized water
Ambient conditions:- 40°C ... + 55°C
Installation:Indoor or Outdoor



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ABB contact for

United States of America
Sales: Axel Nussbaum
Service: Carsten Ritter