Thyristor converters for electrolysis

General characteristics

• Rated currents: from 10 kA to 100 kA;
• Rated voltage: from 50 to 460V;
• The power unit – thyristor rectifier is implemented as 12-pulse circuit with parallel connection of bridges.

Structural design

• The product consists of the following cabinets:
  – Cabinet with power bridge;
  – Rectifier control cabinet;
  – Remote control terminal.
• Devices of local control and adjustment inside the control cabinet:
  – Resistor “Local set up” (alternatively on the door);
  – Console terminal (alternatively on the door).
• Devices of local control and adjustment on the control cabinet door:
  – Electrolysis current and voltage devices;
  – Current devices in each parallel;
  – Console terminal (alternatively inside the cabinet);
  – Lamps: “Power Supply”, “Readiness”, “Warning”, “Accident”;
  – State lamps NLTC (OLTC).
• Special aspects of the control panel:
  – The control panel is based on PC-compatible computer. The electrolysis process is controlled by a special software shell;
• The control panel is connected to the control cabinet via ProfiBus network, which allows for connection of several control cabinets to one control panel.

Functionality

• Control:
  – Current control – provided that there is transformer OLTP, it is possible to automatically change taps depending on the load and required current;
• Flexible adjustment structure, open for interaction from an external automation system / controller through network interfaces.
  • Fully featured protection system:
  – Converter protection;
  – Transformer protection;
  – Technological protection.
• Control system parameters:
  – Adjustment system – PI-controller.