Overspeed Protection

    Electronic overspeed protection systems to replace old analogue electronic or mechanical devices. Systems can be SIL 3 according to IEC 61508.

    Mechanical and older analogue overspeed trip systems are prone to:

    • Drift of the setpoint resulting in inconsistent operation.
    • The turbine has to run in order to test them.
    • Hard to maintain and scarcity of spares.

    Microprocessor based overspeed systems offer the following advantages:

    • Can be tested whilst the turbine is shutdown.
    • Operating setpoint is constant.
    • Improved diagnostics.

    The scope of supply may include:

    • Panel mounted monitor with test signal injector.
    • Magnetic or eddy current type speed probes.
    • Signal cabling.
    • Installation design.
    • Setup and testing of the complete system.