IS200VVIBH1A

VME VIBRATION CARD

Product DESCRIPTION

Specifications

Part Number

IS200VVIBH1A

Manufacturer

General Electric

Country of Manufacture

As Per GE Manufacturing Policy

Series

Mark VI/VIe

Function

Module

Availability

In Stock

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TECHNICAL SPECIFICATIONS FOR GE - IS200VVIBH1A

IS200VVIBH1A is an Vibration Monitor Board developed by GE. It is a part of the Mark VI control system. The Mark VI system incorporates Bently Nevada probes for shaft vibration monitoring, with the Vibration Monitor Board playing a central role in processing signals from these probes. This information is obtained from the TVIB terminal board, to which up to 14 probes can connect directly. Two TVIBs can then be cabled to the VVIB processor board. The VVIB digitizes the diverse vibration signals and transmits them over the VME bus to the controller.

PROTECTIVE FUNCTIONS IN TURBINE APPLICATIONS

Vibration probe inputs are typically utilized for four protective functions in turbine applications:

Vibration Monitoring: Proximity probes monitor the peak-to-peak radial displacement of the shaft, capturing the shaft's motion within the journal bearing in two radial directions. The system employs non-contacting probes and Proximitors, providing alarm, trip, and fault detection capabilities.

Rotor Axial Position Monitoring: A probe is strategically mounted in a bracket assembly off the thrust bearing casing to observe the motion of the thrust collar on the turbine rotor. Similar to vibration monitoring, this system utilizes non-contacting probes and Proximitors, resulting in thrust bearing wear alarm, trip, and fault detection.

Differential Expansion Monitoring: This application employs non-contacting probes and Proximitors to detect excessive expansion differential between the rotor and the turbine casing. It provides alarm, trip, and fault detection for differential expansion issues.

Rotor Eccentricity Monitoring: A probe, positioned adjacent to the shaft, continuously senses the surface and updates the turbine control. The calculation of eccentricity is made once per revolution during turning gear operation. The system provides alarm and fault indications for rotor eccentricity.

INSTALLATION

Power Down the Processor Rack: Before proceeding with the installation, ensure the processor rack is powered down. This precautionary measure prevents any potential electrical interference or disruptions during the installation process.

Slide in the Board: Carefully slide VVIB into the designated slot in the rack. Ensure that the board is aligned with the slot and smoothly insert it to establish proper connections.

Secure the Board with Levers: Once the board is correctly inserted, use your hands to push the top and bottom levers. These levers play a crucial role in securing the board firmly in place, establishing a reliable connection with the edge connectors within the rack.

Tighten Captive Screws: To further secure the board and prevent any unintended movement, tighten the captive screws located at the top and bottom of the front panel. Use an appropriate tool to ensure a snug fit without over-tightening.

OPERATION

Probe Compatibility: TVIB is designed to support a variety of Bently Nevada probes, including Proximitor, Seismic, Accelerometer, and Velomitor probes. These probes are specialized for monitoring different aspects of turbine performance and mechanical conditions.

Power Supply: Power for the vibration probes is supplied by the Vibration Monitor Board. The VVIB boards, operating in either Simplex or Triple Modular Redundant (TMR) mode, ensure a stable and reliable power supply to the connected probes.

Probe Signal Processing: The signals from the vibration probes are transmitted, where they undergo processing. TVIB supports Proximitor, Seismic, Accelerometer, and Velomitor probes, and it is capable of handling signals from these sensors with precision.

A/D Conversion: After receiving the probe signals, TVIB facilitates Analog-to-Digital (A/D) conversion. This process digitizes the analog signals from the probes into digital values, making them suitable for further processing and analysis.

Communication with Controller: The digitized vibration signals are then sent over the VME bus to the controller. This communication pathway ensures that the processed data is efficiently transmitted to the central control system for real-time monitoring, analysis, and decision-making.

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