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YOKOGAWA PW481-10 New Original Japan

A maximum override time limit is provided as an extra level of protection, in the event the contact input is left closed. A ten minute maximum time limit is applied to the Manual override command (as defaulted in the Service Mode). This time starts when the RUN command is initiated and re-arms the loss-of-speed detection when the time expires. The 505E will execute a system shutdown if turbine speed is not above the ‘Failed Speed Level’ setting when the time expires.

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