GE IS200TRPGH1BCC Primary Trip Terminal Board
Description:
IS200TRPGH1BCC is designed as GE Mark VI series turbine primary trip terminal board. The Gas Turbine Primary Trip (TRPG) terminal board is controlled by the Primary turbine Protection I/O pack (YTUR or PTUR) or by the VTUR board. TRPG contains nine magnetic relays in three voting circuits to interface with three trip solenoids (ETDs). The TRPG works in conjunction with the TREG to form the primary and emergency sides of the interface to the ETDs. TRPG also accommodates inputs from eight Geiger-Mueller  for gas turbine applications.
The I/O pack board provides the primary trip function by controlling the relays on TRPG, which trip the main protection solenoids. In TMR applications, the three inputs are voted in hardware using a relay ladder logic two-out-of-three voting circuit. The I/O pack/board monitors the current flow in its relay driver control line to determine its energize or de-energize vote/status of the relay coil contact status. Supply voltages are monitored for diagnostic purposes. A normally closed contact from each relay on TRPG is monitored by the diagnostics to determine its proper operation.