About the IS200TREGH1BEC
THe IS200TREGH1BEC is associated with the Emergency Turbine Protection PCB (VPRO), and:
- Helps provide independent emergency overspeed protection, separate from the main turbine control system
- Controls trip solenoids using the associated TREG board and works in conjunction with a TRPG board
- Provides the positive side of 125 VDC trip function, with the other board providing the negative side
- Features a total of twelve relays on its surface
- Nine relays form three groups of three, which vote upon inputs controlling trip solenoids
- These relays receive 28 VDC supplied from the VPRO board
Other components include:
- Three (female) d-shell connectors for cable connections
- Two terminal strips
- Several additional female plug connections
- Twelve metal oxide varistors
- Several wire jumpers
- Integrated circuits and transistors
- Resistors, diodes, and capacitors mounted on both front and rear surfaces
IS200TREGH1BEC Product Identification & Revision History
This device is not the originally-manufactured product for its specific Mark VI Series functional role; it is a revision of the IS200TREGH1 parent board. Its functional product number serves as a primary source of hardware component and specification information:
- "IS200" series tag: Codes for normal Mark VI Series assembly and domestic original manufacture location
- "TREG" functional product acronym
- "H1" series grouping tag: Denotes Conformal PCB coating style and Group one Mark VI Series product grouping
- Three-fold revision history (indicated by the "BEC" at the end of the part number)
