What is Retrofitting?

Adding a component or accessory to a product that did not have it when it was manufactured.

Why retrofit?

This can be answered by considering the operating plant costs for:

• Frequent maintenance and re-calibration
• The level of manual intervention to operate
• Unreliable equipment breakdown
• Non-scheduled shut down
• Difficult to diagnose situations causing extended outages

Experience has shown that failures are mainly due to:

• Controls
• Instrumentation
• Auxiliaries

In other words, the core engine is robust and reliable; it is the control and instrumentation equipment that causes the majority of failures.

What can TCL retrofit?

When considering a retrofit always try and move as many control functions from hydro-mechanical equipment to software, electronic or electrical control. This will always improve reliability.

A typical scope of a controls system retrofit might include:

• Plant sensors including:
  • Switches replaced with transmitters (pressure and temperature)
  • Vibration
  • Speed
  • Level
• Control functions including:
  • Governor
  • Sequencer
  • Temperature Monitor
  • Pressure Monitor
  • Vibration monitor
  • Overspeed Trip
  • Emergency Shutdown
  • AVR, Generator Protection
  • Load Management
  • Operator Interface
  • Event Recorder
  • Remote Control
• Plant driven devices such as:
  • Gas control valves
  • Liquid fuel control valves
  • MCC Starters
  • Solenoids
  • Motors
  • Actuators
  • Cables

What hardware does TCL use to retrofit?

TCL chooses equipment that is readily available, mass produced and modular. This type of equipment will provide you with the following benefits:

• Developed product
• High quality
• Cost effective
• Latest technology
• Readily available
• Reduced delivery time
• Spares readily available