The invention relates to a revolution speed adapter plate for a
turbine, which belongs to the technical field of
turbine revolution
speed measurement. The revolution speed adapter plate for the
turbine aims at solving the problem that as the revolution speed measuring transducers of existing turbines are limited by respective functions, giving consideration to both accuracy and reliability is very difficult. The revolution speed adapter plate for the turbine comprises a direct-current power supply, a first frequency
voltage converter, a second frequency
voltage converter, a high selective circuit, a comparison circuit, an
inverter, a first
relay and a second
relay, the two frequency
voltage converters respectively receive speed signals output by a magnetic resistance type speed measuring
transducer and an eddy speed measuring
transducer, a greater value is output by the high selective circuit, after the greater value is compared with the voltage threshold value of the comparison circuit, an
inverter is adopted to control the
relay to
gain power or lose power according to the level
signal of the comparison circuit, and a revolution speed
signal is selected to be output. The revolution speed adapter plate for the turbine is used for selecting and outputting the revolution speed
signal obtained by the speed measuring
transducer.