Product Description
Mark VI IS200 Turbine Emergency Trip Model IS200TREGH1A was designed by General Electric to work alongside a VPRO Turbine Emergency Trip Module. When the TREG model is used with a VPRO I/O Processor Board, it also works with two other terminal boards, which are the TPRO/Turbine Protection and TRPG/Primary Trip boards. The TREG model is designated as the positive side to the available 125 VDC solenoids, while the TRPG model is the negative side. While being used with the VPRO board, the IS200TREGH1A model will control the twelve relays available on this model. Nine of the relays will form three groups of three to form vote inputs, which will then control the three trip solenoids available on the VPRO processor. A second TREG board can be connected to the VPRO processor, which will be driven from the VPRO board to the J4 connector.
Typically the IS200TREGH1A model can be used in either Simplex or Triple Modular Redundant (TMR) systems. When the TREG model is being used in TMR systems, it will be completely controlled by the VPRO board through the trip solenoids and the J2 power cable connections. When the model is used in a Simplex system, an extra cable will be added to carry a trip signal from the J1 connector to the associated TSVO terminal board; the extra cable will provide the TSVO model with a Servovalve clamp function upon a turbine trip function.
Together the TREG and TRPG models will control the trip solenoids on the VPRO model; when the two models are working together, either one of them has the ability to remove the power and actuate the hydraulics within the Mark VI systems to close the fuel or steam valves. For more information on the function of the IS200TREGH1A board, refer to the attached documentation, which covers the function between the TREG, TRPG, and VPRO boards.