DS200TCCBF1BDA - Software EPROM Set

SPECIFICATIONS

Part Number: DS200TCCBF1BDA
Manufacturer: General Electric
Series: Mark V
Temperature -30 to + 65 oC
Altitude: 2000 m maximum
Relative humidity: 5 to 95 percent non-condensing
Surge: Designed to ANSI C37.90.1
Repair: 3-5 Days
Product type: Software EPROM Set
Country of Manufacture: United States (USA)

Functional Description

DS200TCCBF1BDA is a software EPROM set developed by GE under Mark V control system. EPROM in controllers provides a stable and reliable foundation for the system's operation, safeguarding vital data and ensuring the continuity of control processes in various industrial applications.

System Master Trip Circuit

• Inputs to the Mark V: The inputs to the system, which trigger the turbine trip, can originate either from hardwired connections or remote sources. In the case of hardwired inputs, typically configured as contact open to trip, these connections link to the 4's relay coils, denoted as such in adherence to the ANSI standard device numbering system.
• Output from the Mark V: On the output side, the Mark V system orchestrates the response to these inputs. The Master Trip Circuit is designed with redundancy to ensure fail-safe operation. It incorporates redundant relay coils, with one set connected to the positive DC bus and another set connected to the negative bus.
• Redundancy and Fail-Safe Design: A fundamental aspect of the Master Trip Circuit's design is its fail-safe architecture. Even in the event of a failure of any single relay coil (designated as 4's), the system remains robust and prevents accidental turbine trips. This is achieved through a mechanism wherein the resultant hardware contact, arising from the failed relay, is overridden by the operational relay, ensuring that the trip signal is not inadvertently triggered.
• Trip Logic: The trip logic of the Master Trip Circuit is engineered to require the de-energization of both relay coils connected to the same DC bus (either positive or negative) to initiate a turbine trip. This stringent requirement minimizes the possibility of false trips and ensures that the turbine is only tripped under deliberate and validated conditions.

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FREQUENTLY ASKED QUESTIONS

What is DS200TCCBF1BDA?
It is a software EPROM set developed by GE.

Can the Mark V system continue operating if there is a fault in one of the analog inputs?
Yes, the system can continue to operate even if there is a fault in one of the analog inputs. It uses the median signal from the R, S, and T controllers to continue performing control and protection calculations, ensuring ongoing turbine operation.

What are the benefits of using median signal processing in the Mark V system?
Using median signal processing helps the Mark V system to maintain accurate control and protection even if one of the inputs is faulty. This redundancy ensures that the system can continue to operate safely and reliably, minimizing the risk of incorrect calculations due to a single faulty input.

How are the voltage signals distributed within the Mark V system?
The voltage signals generated from the burden resistor are internally parallel wired using ribbon cables to the R, S, and T controllers (or just the R controller in simplex applications). This parallel distribution allows for effective discrepancy detection and median signal processing.