IS200VPROH2B unit GE

Part Number IS200VPROH2B Manufacturer General Electric Country of Manufacture As Per GE Manufacturing Policy Series Mark VI/VIe Function Module Availability In StockIS200VPROH2B is a turbine protection board developed by GE. It is a part of Mark VI control system. 

The Emergency Turbine Protection (VPRO) system, along with its associated terminal boards (TPRO and TREG), serves as an independent emergency overspeed protection mechanism for turbine systems. This system operates independently of the main turbine control system and is designed to ensure safety in the event of critical emergencies. 

SYSTEM COMPONENTS VPRO Board: The board, located in the Protection Module, is the central component responsible for providing emergency trip functionality. It operates with triple redundancy to enhance reliability and features an Ethernet connection for IONet communications with the control modules. Terminal Boards (TPRO and TREG): The TPRO and TREG terminal boards facilitate the connection between the board and the trip solenoids. TPRO serves as the interface between VPRO and TREG, while TREG provides the positive side of the 125 V dc power to the solenoids. TRPG, another terminal board, provides the negative side. 

SYSTEM FUNCTIONALITY Emergency Trip Function: Primarily responsible for overseeing the emergency trip function. It can control up to three trip solenoids connected between the TREG and TRPG terminal boards. 

Trip Solenoid Control: TREG supplies the positive side of the 125 V dc power to the trip solenoids, while TRPG provides the negative side. Both TREG and TRPG are equipped to trip the turbine independently if necessary. Relay Control: Controls a total of 12 relays on the TREG board, nine of which are organized into three groups of three. These relays are utilized to vote inputs controlling the trip solenoids, ensuring redundancy and reliability in critical emergency scenarios. 

MPU CHARACTERISTICS Output Resistance and Inductance: The MPU's output resistance is measured at 200 ohm, accompanied by an inductance of 85 mH. These parameters determine the impedance of the MPU's output circuitry. Output Voltage and Load: The MPU generates an output voltage of 150 V peak-to-peak (p-p) when connected to a load of 60 Kohm at the TPRO terminal block. Despite this voltage, the energy output is insufficient to produce a spark.Maximum Short Circuit Current: In the event of a short circuit, the MPU can deliver a maximum current of approximately 100 mA. This current limit ensures the protection of the system components in case of a fault. Normal Mode Load: To mitigate voltage fluctuations and ensure stability, the system applies a normal mode load of up to 400 ohm to the input signal. This load helps in reducing the voltage level at the terminals, thereby maintaining safe operating conditions. 

HARDWARE VERIFICATION PROCEDURE Operate K25P Relay:Force the output signal Sync Perm found under VTUR card points to operate the K25P relay. Verify the functionality of the K25P relay by probing TTUR screws 3 and 4. Note: The application code has direct control over this relay. 

Operate K25 Relay:Simulate generator voltage on TTUR screws 17 and 18. Operate the K25 relay by forcing the TTUR card point output signals Sync Bypass1 to 1 and Sync Bypass0 to 0. Verify the functionality of the K25 relay by probing screws 4 and 5 on TTUR. Operate K25A Relay: Simulate generator voltage on TPRO screws 1 and 2. Operate the K25A relay by forcing TPRO card point output signals SynCK Bypass to 1 and SynCk_Perm to 1. Note: The bus voltage must be zero (dead bus) for this test to be functional. Verify the functionality of the K25A relay by probing screws 5 and 6 on TTUR.PROTECTION CARD