Product Description
The IS200TRPLH1A functions as a Large Steam Turbine Primary Trip terminal card used as the primary protection from overspeed when used in conjunction with large steam turbines. Control of the board is placed on the turbine protection controller card, typically a VTUR or PTUR board depending on the system type. The TRPL board can be used in a Mark VI or Mark VIe Control System. When the model is used in a Mark VI control system the model will be controlled by the VTUR and is only supported in TMR applications. When the model is used with the Mark VIe Control it is controlled by the PTUR I/O packs on the TTURH1C model and is only supported in TMR applications as well.
The model also works in conjunction with a TREL board to provide emergency/primary interfaces to the ETDs. The TRPL board provides the negative side of the 125 VDC to the trip solenoids while the TREL offers the positive side. Together the TREL and TRPL board can connect up to three solenoids.
The IS200TRPLH1A is populated by two large terminal strips with a total of 48 connector points. It also has three d-shell connectors, MOV (metal oxide varistors) diodes, resistors, transistors, integrated circuits, wire jumpers, and nine magnetic relays. The relays on this board are in three voting circuits that interface with three trip solenoids. The solenoids use two out of three contact voting, and trip circuits include solenoid suppression and voltage monitoring.