Woodward 505LST For Large Steam Turbines

Application:
The 505LST digital control is designed to control large power-generation-based reheat steam turbines with up to 4 modulating valves (up to 6 valves with the use of external drivers).
This control performs turbine speed control off-line, and throttle pressure or valve position control on-line. Full-arc partial-arc transfers are accomplished on- or off-line depending on the unit's configuration. Valve testing can be done automatically or manually from the control's front service panel, or remotely via discrete commands.
Depending on the programmed configuration, overspeed valve regulation is achieved via throttle and or intercept valves.
The 505LST can be configured to operate as a stand-alone unit or in conjunction with a plant's Distributed Control System.