GE IS200VVIBH1CAB VME Vibration Card
Description：
IS200VVIBH1CAB is part of GE Mark VI VME Vibration Card.
The VVlB cards in the control modules directly monitor Bently Nevada vibrationsensors. An X and Y probe is used to monitor vibration on the HP and LP turbine bearings and the inboard and outboard pump bearings. The main display shows a turbine-pump diagram with a bearing vibration level determined by the highest vibration level of each X/Y probe pair. Vibration levels for each probe are displayedin bar chart format on the proximitor display. Vibration levels are displayed in green if the vibration is below the high alarm level and no fault is detected. An abnormalcondition will cause the specific bar to turn red.
The ac component of the proximitor input is used to determine the vibration magnitude, and the de component is used to monitor the gap for fault detection. A high or high-high alarm will occur if excessive vibration is detected on either probe. A fault alarm will occur if a fault is detected on any probe, and it will inhibit a false alarm message of a high vibration level. Unigue control constants are used to set the high (K39VA# A/B) and high-high (K39VT# A/B) alarm levels for each probe. All turbine trips for the vibration system must be manually initiated. Vibration data available in the data base and from buffered BNC connectors on theTVlB terminal boards includes:
The unfiltered Direct Magnitude of the vibration input in (mils)
The lX Magnitude (mils) and Phase Angle (degrees)
The 2X Magnitude (mils)
The dc gap voltage (mils)