TEST APPARATUS FOR THRUST BEARING WEAR OF TURBINE GENERATOR

摘要

PURPOSE:To provide a test apparatus which is highly reliable and easy of handling through integration of detection switch groups and an interlock which composing a test apparatus when a test in made. CONSTITUTION:A turbine trip circuit comprises instrumentation contacts 21 and 22 for test detection, test detection switches 23 and 24, pressure switches 25 and 26 for detecting thrust bearing wear, a turbine tripping solenoid 27 and a turbine trip setting switch-all connected in series. Therefore, when either the instrumentation contacts 21 and 22 or the test detection switches 23 and 24 are opened, the turbine tripping solenoid 27 fails to be excited even if the pressure switch 25 or 26 is closed. Thus, turbine tripping takes place. In this manner, the multiplication of the detection contacts for testing checks the mistripping of the turbine accurately.