Digital guide
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GE IS200TREGH5B
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Product Description: Turbine protection terminal board that powers emergency trip solenoids and votes trip commands coming from TREG relay logic. H5B revision is configured for redundant TREG pairs.
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Technical Specifications:
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Relays: 2 rows of 6 (12 total), 9 used for solenoid support
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Detailed content
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Solenoid supply: Positive DC to up to 3 trip solenoids
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Companion board: TRPG provides negative side
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Power input: JZ1 connector feeds feedback and economizer relays
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Coating: Conformal PCB coating
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Read-only ID chip: Stores serial, revision, plug position
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Functional Features: 2-out-of-3 or 2-out-of-2 voting depending on system config, FlashDrop-capable parameter transfer on some variants, direct wired AND with VPRO protection module.
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Application Scenarios: Heavy gas and steam turbine emergency overspeed/stop protection in Mark VI control rooms.
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Installation Requirements: Secure in TREG rack slot, separate positive/negative solenoid wiring, verify JZ1 orientation, test trip path with injected signal before turbine roll.
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Usage Notes: Never bypass economizer relay; verify relay contact resistance annually; H5B is not a drop-in for H1B without cabinet rewiring review.
