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Overview

The GE IS200VPROH2B is a Turbine Protection Board for the Mark VI control system.
It provides an independent emergency overspeed protection mechanism, operating separately from the main turbine control system.

System Components

1. VPRO Board

• Core of the protection module with triple redundancy.
• Manages emergency trip functionality.
• Supports Ethernet IONet communication with control modules.

2. Terminal Boards (TPRO and TREG)

• TPRO Board: Interfaces between VPRO and TREG boards.
• TREG Board: Supplies positive 125 V DC to trip solenoids.
• TRPG Board: Supplies negative 125 V DC to solenoids.

System Functionality

Emergency Trip Function

• Controls up to three trip solenoids, connecting TREG and TRPG boards.

Trip Solenoid Control

• TREG: Positive power supply.
• TRPG: Negative power supply, allowing independent turbine trips.

Relay Control

• Manages 12 relays on TREG.
• Includes voting inputs for redundancy and reliability.

MPU Characteristics

• Output Resistance & Inductance: 200 Ω, 85 mH.
• Output Voltage & Load: 150 V peak-to-peak with 60 kΩ load.
• Short Circuit Current: Max 100 mA.
• Normal Mode Load: Up to 400 Ω for voltage stability.

Hardware Verification Procedure

1. Operate K25P Relay
   • Force Sync Perm output under VTUR card points.
   • Probe TTUR screws 3 and 4.
2. Operate K25 Relay
   • Simulate generator voltage on TTUR screws 17 and 18.
   • Set Sync Bypass1 = 1, Sync Bypass0 = 0.
   • Probe TTUR screws 4 and 5.
3. Operate K25A Relay
   • Simulate generator voltage on TPRO screws 1 and 2.
   • Set SynCK Bypass = 1, SynCk_Perm = 1.
   • Probe TTUR screws 5 and 6.
   • Note: Bus voltage must be zero (dead bus) during this test.

Specifications

Applications

The IS200VPROH2B board is ideal for:

• Turbine overspeed protection
• Industrial power generation systems
• Critical emergency trip functions

Details