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COLUMBUS STAINLESS (PTY) LTD, MIDDLEBURG (Jan 2008 – Mar 2009)

Job Title: ELECTRICAL ENGINEER IN TRAINING

 

Section: HT and SYSTEMS DEPARTMENT (JAN 2009 – Mar 2009)

CORE RESPONSIBILITIES: Projects, Commissioning and Maintenance at power distribution

  • Static Reactive Power Compensator Upgrade: 5th Harmonic Filter components specifications (capacitors, inductors, resistors, surge arresters, surge capacitors, cables ratings), Protection coordinating (fault current calculations, relay settings), total project cost calculations, etc
  • I2t calculations for new MCC (type 2 coordination)
  • Protection coordination on 132KV/33 KV/6.6 KV/550V Network using PowerMaster software

Commissioning Activities:

  • Micom P225, Micom P123, SPAJ 140C, SPAM 150C relays commissioning
  • GIS Vacuum Circuit breakers corona losses tests

Section: COLD ROLLING MILLS (JAN 2008 – DEC 2008)

CORE RESPONSIBILITIES: Maintenance and projects at control, instrumentation and power distribution of Cold Rolling Mills section.

  • Daily inspections, repair, calibrations, and general maintenance on the Cold Rolling Mills systems.
  • Fault-finding and problems solving during break-downs.
  • Failure Root Cause Analysis on defective systems
  • Preventative maintenance during shut-downs.
  • Projects such as new equipment installations, PID systems design, Systems optimization suggestions, PV energy system design, etc.

THE ABOVE RESPONSIBILITIES WERE PERFORMED ON:

  • Power Distribution Systems: 6.6KV / 550V Sub-station reticulation, Motor Control Center Equipment: Transformers, CT’s, VT’s, Circuit Breakers, Isolators, Fuses, Contactors, Overload relays, Earth Leakage relays, Lightning protection (Surge suppressors), Contactor Control Units and Uninterruptible Power Supply (UPS) units.
  • Electromechanical Systems: DC, Squirrel-cage Induction, Servo and Synchronous Motors; Servo and proportional valves.
  • Instrumentation and Measurement Systems: Restrictive, magnetic, laser, ultrasonic and magneto-restrictive linear variable displacement transducers; Proximity, level, flow, temperature, pressure, infrared and photoelectric switches and transducers; Hydraulics and Pneumatics systems; X-Ray Gauge Measurement Systems; ABB Shape Systems; Eddy-Current Measurement Systems; Center-guide systems.
  • Control Systems: PLC exposure: MULTIGEM-2MT, Toshiba V3000, Mitsubishi, Siemens S5 and ABB Advant 450. SCADA systems: FactoryLink, Intouch Wonderware and OperatorIT. DC and AC Variable Speed Drives (ABB, Alstom, Siemens, Toshiba, etc): Thyristor-based DC, Thyristor-based Cyclo-converters, Sine-Wave PWM (IGBT and IEGT).