TCL | TC41-SG Governor System

TC41-SG Governor System

TC41-SG Governor System

The TC41-SG microprocessor system is designed to meet the requirements of Steam Turbine GOVERNING, for turbines in the range 0.5MW to 50MW. A typical application would be a steam turbine powered boiler feed pump The processor, I/O modules, 6" LCD touch screen are housed in a 3U high 19" rack subassembly. A wide range of input and output modules provides interface with plant devices and options for alternative or additional functionality.

Obsolete and unreliable equipment is replaced with modern digital electronics having high reliability and accuracy and is an affordable alternative to a full control system retrofit. Communication facilities provide interface with other diagnostic and control equipment. The governor system is easy to install, increases reliability, easy to program and configure.

Hardware Features

General Features

  • High quality PCC CPU processor
  • 700 kB SRAM, 4 MB Flash PROM
  • 0.4 micro second instruction time (typical)
  • LED status indicators
  • 24V DC operation max 20 W
  • All inputs, outputs and power supply are protected
  • Operating temperature 0-50°C. Storage -20°C to +60°C
  • Weight approx. 2 kg
  • 3U (132mm) high 19" rack sub assembly, 162mm deep

Operator Interface

Backlit 6" LCD touch screen display to enable the operator to make quick and informed decisions on the status of the gas turbine.

  • Logic I/O Status
  • Bar graph and Digital display of analogue values
  • Alarm and trip alphanumeric message, time and date stamped
  • Trend plot to view analogues
  • Commissioning Modes to ease fault finding and set up
  • Allow forcing of outputs Adjustment of control parameters (Gains, setpoints etc.)

I/0 Capability

  • 10 x 24 VDC sinking logic inputs
  • 8 x 24 VDC sourcing outputs
  • 1 x clean contact output (used for trip contact) 0.5 A max
  • RS232 and CAN bus interface ports
  • 6 input modules for:
    • 4 x frequency/speed inputs
    • 4 x 4 - 20 mA signals
    • 4 x thermocouple input with cold junction compensation
    • 4 x Analogue outputs
    • 4 x RTD input
    • 4 x Additional logic I/O
    • RVDT, LVDT and throttle actuator drives

Typical functions

  • Turbine Speed Control
  • Vacuum support
  • Boiler support
  • MW load control
  • Valve output control
  • Valve on-load test