Boiler Feedpump Control

Mechanical speed governing systems are prone to wear and hence setpoint drift. This can result in spurious overspeed trip operation or even failure to trip when during a genuine overspeed condition. Drift of the operating setpoint also requires constant operator intervention. The TC41-FPG offers a low cost solution for a speed governor control system for steam driven boiler feed pumps.

The TC41-FPG can interface with an existing hydraulic actuators or it can be supplied with a hydraulic actuator to replace a mechanical speed governing system. The TC41-FPG comes pre-programmed with the following functions:

  • Turbine Speed Control
  • Rate of acceleration detection
  • Run-up ramp control
  • Remote speed setpoint e.g. boiler follow mode
  • Steam stop valve ramp open/close and trip close
  • Alarm and trip initiation

Options for:

  • On-load valve test, for multi-steam path
  • Ovespeed trip detection
  • Stress run-up control

Hardware Features

  • High quality PCC CPU processor
  • 700 kB SRAM, 4 MB FlashPROM
  • 0.4 micro second instruction time (typical)
  • LED status indicators
  • 24 Vdc operation max 20 W
  • Operating temperature 0-50 deg C. Storage -20 to +60 deg C
  • 3U (132mm) high 19" rack sub assembly, 162mm deep

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 built in
    • 4 x Analogue output
    • 4 x RTD inputs
    • Additional logic I/O
    • RVDT, LVDT and valve actuator drives. Options for all signals e.g. 4 - 20mA, 0 - 200mA etc.

Operator Interface

Backlit ¼ VGA (120x90mm) graphic monochrome LCD display with keypad 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 and adjustment of control parameters (Gains, setpoints etc.)

+44 (0)116 271 7248