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DC High Current Rectifiers

has supplied and commissioned more number of DC High Current Rectifiers and power supplies than any other supplier in India. The supply range is from 10 kA to 100 kA upto 850 V. Higher currents and voltages are also possible with parallel and serial connections of the individual devices.

The applications for DC High Current Rectifiers include,
Smelters for Aluminium.
DC Supplies for Caustic Soda, Potassium Chlorate,Manganese Dioxide, Hydrogen products etc.

The scope of High Current Rectifiers include H.T. Switchgear, Rectifier Transformers, Thyristor Rectifiers with Water Cooled Heat sinks, Semiconductor fuses, High 

System offered

  DC Drives
  AC Drives
  DC High Current Rectifiers
  Automation Systems
  Mining & Material Handling
  Reactive Power
  Power Systems
  Diesel Power Plants
  Plant Auxiliary Systems
  Pumping Stations
  Back to Main

Current Metering Units, AC/DC Busbars, Demineralised Water Cooling system, Protection and Interlocking equipment, Digital Control equipment for Voltage regulation, Current regulation, Current sharing and Sequential switching of units.

The equipment supplied conforms to IEC 146, IS 4540 and other national & international standards.
Automation Systems

Keeping up with the technological trends in the industries, ISG has engineered and supplied Automation systems upto Level-2 for various applications for Metal, Mining, Oil, Pipelines and other industries with following systems.
Programmable Logic Controllers (PLC) for..sequencing & interlocking.
Distributed Digital Control Systems (DDC)for.Instruments, Sensors, Single & Multi-loop controllers for process instrumentation and.control
Supervisory Control & Data Acquisition Systems (SCADA) for data analysis, storage and fault monitoring.
Simulation systems for Sub-station controls.
Oil Terminal Automation systems.
Weighing and Batching systems.
Level-1 computers or Distributed Control system for Plant Set-up data, production schedules, set point generation, Man Machine Interface (MMI), Special controls, status display and fault monitoring etc.
Automatic Gauge Control (AGC) systems for mills.

ISG has supplied automation systems alongwith communication and interface software with various leading automation hardwares viz., PEP, Siemens, Allen Bradley, Toshiba, Rank, DEC systems, Modicon, Yokogawa etc.

Networking of the various systems through serial links, peer to peer, Multi-drop, Master-slave, Datahighway, Modbus, Ethernet protocols has been done by ISG in many of the projects.

Typical automation requirements such as Dual communication bus, redundant processors, hot / cold standby systems have been implemented by ISG in the past.

Operator interface and MMI functions for various projects through standard MMI development packages such as Genesys, Intellution, Control View, RS View etc. has been developed, supplied and commissioned by ISG.

With its vast reservoir of trained engineers ISG offers excellent solutions by combining the best of automation platforms available in both hardware and software and tailoring them to the needs of the customer.


AC Drives

Large AC Drives for Energy saving application :

AC Drives of various ratings ranging upto 15000 KW, 11 KV can be offered by ISG for AC Induction Motor and Synchronous motor controls in the energy saving applications. This includes the Gate Turn Off (GTO) device based Curent Source Inverters for Induction Motor Drives (IMDs) and SCR based Load Commutated Inverters (LCI) for AC Synchronous Motor Drives, based on technology from General Electric, USA.

The AC Motors, both Synchronous and Induction motors, required for this application upto 15000 KW and 11 KV can be offered from our Bhopal / Hardwar plants. Flameproof motors upto 5000 KW, 6.6 kV can also be offered.

These drives are used extensively in the Energy Saving Applications viz., Fans, Blowers and Pumps where the damper / valve control is used to regulate the flow.

ISG can undertake system study and energy audit in these fields to offer an optimum solution to the industry and furnish the techno-economic reports.
PWM VVVF / Vector Controlled AC Drives:

ISG can offer Pulse Width Modulation (PWM) Voltage Source, Variable Voltage Variable Frequency (VVVF) inverters for Metal industry drive applications. These drives, with state-of-the-art Vector Control technology, offers distinct advantages over the DC Drive system viz., reduced motor maintenance, smaller motor, higher top speed, energy saving etc.

These drives upto 1000 KW and 660 V can be supplied by ISG using Insulated Gate Bipolar Transistor (IGBT) stacks and suitable for DC Bus or AC incoming supply.

Higher rating AC Drives can also be supplied against specific requirements.

The complete drive package offered includes, AC-DC Converter for Common DC Bus or individual drives, Transformers, Reactors, Switchgear and other items.


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