Protection remains separate from normal turbine control
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Speed inputs Protection sensing
→
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IS215VPROH2BC Independent trip logic
→
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TREG trip path Emergency solenoids
Three VPRO channels form the independent protection module. The board works with the turbine protection and emergency-trip terminal boards rather than as a stand-alone controller.
02 / PROTECTION COORDINATION
Hardware relationships that must stay aligned
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▦ Protection module Confirm the X, Y or Z channel position and the complete VPRO revision.
⇄ Terminal boards Match the installed TPRO and TREG arrangement before replacement.
🔗 IONet link Communication health supports diagnostics but does not replace the independent trip path.
✓ Return to service Complete channel diagnostics and the approved turbine trip-system test sequence.
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03 / BUYER FAQ
Protection details buyers should resolve before a channel swap
QWhy must the channel position be checked for GE IS215VPROH2BC?
➤The independent protection module uses coordinated channels. The replacement must match the installed X, Y or Z position, revision and connected terminal-board path.
QCan GE IS215VPROH2BC be validated only through IONet communication?
➤No. Network health is only one layer; emergency-trip inputs, terminal-board paths, voting health and trip-system functional tests remain essential.
QHow does a GE IS215VPROH2BC channel alarm affect maintenance planning?
➤Treat the alarm as a protection-system impairment, evaluate the remaining voting health, and restore the affected channel under the plant-approved trip-system procedure.
QCan one GE IS215VPROH2BC revision replace another VPRO revision directly?
➤Do not assume direct interchangeability. Board revision, terminal-board support and protection-module configuration must be reviewed as one assembly.
QWhat should be retained before changing GE IS215VPROH2BC?
➤Retain the existing protection settings, diagnostic state, channel assignment, board labels and the approved post-replacement trip-test sequence.