DS200TCCAF1ACE - GE Software EPROM

SPECIFICATIONS

Part Number: DS200TCCAF1ACE
Manufacturer: General Electric
Series: Mark V
Product type: GE Software EPROM
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

DS200TCCAF1ACE is a GE Software EPROM designed and developed by GE. It is a part of the Mark V control system. The Mark V provides operators with instant access to essential control functions, extensive monitoring capabilities, and a multitude of built-in features that proactively safeguard the turbine-generator against a range of irregular operating conditions, including overspeed, oil loss, and overheating.

Master Trip Circuit Features

Master Trip Circuit is a fundamental component of the Mark V control system, responsible for safeguarding the turbine during its operation. This circuit comprises two primary parts: the inputs to the Mark V and the outputs from the Mark V. Let's delve into the intricate details of the Master Trip Circuit to understand its functionality:

• Turbine Protection and Control: The Mark V control system is designed to ensure the safety and optimal performance of turbines. It accomplishes this through the coordinated operation of multiple cores within the control panel.
• Dual-Part Configuration: The Master Trip Circuit consists of two essential segments: the inputs to the Mark V and the outputs from the Mark V. These segments work together to provide comprehensive protection for the turbine.
• Input Segment: The input segment of the Master Trip Circuit deals with the hardwired or remote trip inputs to the Mark V. These inputs, typically triggered by the opening of specific contacts, play a critical role in the overall protection scheme.
  These trip inputs are connected to the 4's relay coils, known as the 4's in accordance with the ANSI standard device number.
• Redundancy for Reliability: Redundancy is a key feature of the Master Trip Circuit, enhancing its reliability. There are redundant relay coils connected to both the positive dc bus and the negative dc bus.
  This redundancy ensures that a failure of any one of the 4's relay coils will not inadvertently trigger a turbine trip. The presence of redundant relay coils and contacts acts as a safeguard, ensuring that a failed relay will not compromise the system's safety.
• Determining Turbine Trip: To initiate a turbine trip, both relays connected to the same dc bus (either positive or negative) must be de-energized. This robust mechanism guarantees that only a deliberate action will lead to a turbine trip, preventing accidental shutdowns.
• External Trip Signals: The Master Trip Circuit also interfaces with external trip signals. When an external trip signal is received, the 4's trip circuit de-energizes, as does the voting contacts circuit. This, in turn, de-energizes the internal 24 V dc protective bus.
• Output Segment: The 24 V dc protective bus, now de-energized, serves as the power source for various critical components, such as Primary Trip Relays (PTRs), Emergency Trip Relays (ETRs), and other relays that interface with the turbine trip solenoids.
  PTRs and ETRs, which are integral to the Master Trip Circuit's output portion, play a pivotal role in controlling the turbine's trip functions.
• Independent Tripping: Importantly, the tripping process in the Master Trip Circuit is independent of any processors. While the microprocessors on protection boards monitor the status of the hardwired or remote trip inputs, the actual tripping mechanism operates autonomously.

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FREQUENTLY ASKED QUESTIONS

What is DS200TCCAF1ACE?
It is a GE Software EPROM designed and developed by GE

What happens when external trip signals are received, and how does it impact the circuit?
When external trip signals are received, the 4's trip circuit and voting contacts circuit are de-energized. This, in turn, de-energizes the internal 24 V dc protective bus, leading to subsequent actions for turbine protection.

What are the components of the output portion of the Trip Circuit, and what is their role?
The output portion of the circuit relies on the 24 V dc protective bus, which powers components such as Primary Trip Relays (PTRs), Emergency Trip Relays (ETRs), and other relays. These components interface with the turbine trip solenoids and play a pivotal role in controlling the turbine's trip functions.

Is the tripping process in the Master Trip Circuit dependent on processors?
No, the tripping process in the Master Trip Circuit is independent of any processors. While microprocessors on protection boards monitor the status of the hardwired or remote trip inputs, the actual tripping mechanism operates autonomously, ensuring rapid and reliable turbine protection.

What is the significance of the Master Trip Circuit in turbine safety and control?
The Master Trip Circuit is a critical safety mechanism in the Mark V control system, ensuring that the turbine remains safe during operation. Its fail-safe design and independent tripping mechanism guarantee the safety and reliability of the entire system.