The IS200VTURH1B is a Primary Turbine Protection board designed by GE for the Mark VI system. The Mark VI is one of several gas/steam turbine management systems by GE released as part of the ‘Speedtronic’ line. The MKVI is built with TMR (triple modular redundant) architecture and has a connected HMI (human-machine interface) that allows users to access turbine data from a central location.
The IS200VTURH1B provides several functions, including monitoring induced shaft current/voltage (with alarming for excessive levels,) measuring turbine speed to generate the primary overspeed trip, and controlling the three primary overspeed trip relays, which belong to the TRPx terminal board. The board is also responsible for monitoring eight Geiger-Mueller flame detectors on gas turbine applications.
The IS200VTURH1B has a connected single-slot faceplate that has three LED indicators and a single cable connector (J5.) The faceplate connects to the PCB via three screw connections. The PCB is built with over sixty integrated circuits, thirteen transistors, hundreds of capacitors and resistors, and diodes and inductor coils. The board has two backplanes, a female multi-position plug for connecting a daughterboard, and several connectors created from conductive dots and traces. The board is factory drilled in several locations for mounting options, including four drill holes for standoffs to support the previously mentioned daughterboard. The board is marked with codes like 6BA01, 94V-0 and Type 6. More information on the operation, installation, and functions of the IS200VTURH1B is located in the Mark VI Turbine Control System Guide (GEH-6421.) This publication also has a list of alarm faults with fault codes, fault descriptions, and possible causes listed.
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