SPECIFICATIONS
Part Number: DS3820PSCB
Manufacturer: General Electric
Series: Mark IV
Product Type: Power Supply Module
Power Requirements: +5 V dc, 7A
Number of relay channels: 16
Power supply voltage: 24 V dc
Size: 15.9 cm high x 19.7 cm
Weight: 0.8kg
Repair: 3-7 Day
Availability: In Stock
Country of Manufacture: United States (USA)
Functional Description
DS3820PSCB is a Power Supply Module manufactured and designed by General Electric. It is a part of the Mark IV Series used in GE Speedtronic Gas Turbine Control Systems. A power supply assembly module is a component that provides electrical power to a device or system. It typically includes a power supply unit (PSU), which converts AC power from an electrical outlet into DC power that can be used by the device or system. The module may also include additional components such as voltage regulators, filters, and fuses to ensure the power supplied is stable and safe. The power supply assembly module can be designed for a specific device or system or maybe a standardized module that can be used in a variety of applications. It is commonly used in electronics, such as computers, telecommunications equipment, and industrial automation systems.
DS3820PSCB Features
- It is enclosed within a metal housing featuring multiple strategically positioned cutouts. These cutouts serve a dual purpose: granting technicians easy access to the internal boards while facilitating air circulation and heat dissipation.
- The frame has been meticulously drilled at various points to accommodate the installation of PCBs and other components. Several flanges have been meticulously outfitted with slots, holes, and screw mounts, allowing for seamless integration with other modules. The top section of the frame comprises a four-pin female connector, a circuit breaker, and a fuse. Notably, the edge of the frame is marked as enable/disable, corresponding to a toggle switch mounted on an interior PCB.
- The board features a 6-pin male header and eight 12-pin female connectors. Its attachment to the housing is secured by metal screws inserted through pre-drilled factory holes.
Characteristics
- Input voltage range: Designed to accept a specific input voltage range, such as 100-240V AC, depending on the application.
- Efficiency: Designed to be as efficient as possible, converting the input power to the output power with minimal loss.
- Protection: Designed with protection mechanisms to prevent damage to the other components in the system in case of overvoltage, overcurrent, or short circuits.
- Cooling: Rquire cooling to dissipate heat generated by the power conversion process. This can be achieved through passive cooling, such as with a heatsink, or with active cooling, such as with a fan.
System Controllers
- The system controllers, integral components within the turbine's control system, play a pivotal role in overseeing critical analog outputs and ensuring the precise regulation of various parameters essential for efficient turbine operation. Each controller governs one of three independent coil servo valves, managing analog outputs responsible for vital functions like fuel flow adjustment and inlet guide vanes positioning.
- These controllers operate by receiving digital inputs and converting them into analog signals, which serve as continuous control reference signals for the servo valves. To ascertain the error signal for a servo valve, this analog output is compared against a feedback signal. The cumulative output currents from R, S, and T, each having a magnitude limit, are utilized within the magnetic circuit of the servo valve. In the event of conflicting signals, any two signals can supersede the third, ensuring proper control even in the presence of a malfunction.
- Consider a scenario where one of the controllers, let's say T, experiences a failure. This failure leads to the maximum current being driven to the fuel servo valve, causing an increase in actual fuel to the turbine. Consequently, this increment may slightly surpass the setpoints in R and S, triggering an immediate request from R and S to reduce the fuel. Through a two-out-of-three voting mechanism, these controllers are able to override the erroneous signal from T, ensuring accurate control of the turbine's critical functions.
- These controllers contribute to critical logic outputs, such as commanding the closure of the stop valve. Each controller independently generates a logic signal directed to the Relay Driver Module (RDM). The RDM hardware, based on the two-out-of-three majority logic inputs from the controllers, outputs a logic signal to activate a relay. In the case of a controller failure, the turbine continues operation under the control of the remaining two controllers, maintaining operational continuity.
- The system is equipped with robust online diagnostic tests capable of identifying faults in individual components. Most common component failures affecting only one processor can be diagnosed, repaired, and reintegrated into the system while the turbine remains operational. This efficient repair process, with an expected repair time of three to four hours, allows the system's fault tolerance to be swiftly restored to its original level without the need for turbine shutdowns.
- Additionally, employing redundant sensor inputs minimizes forced outages resulting from faulty sensors, enhancing the overall reliability and uptime of the gas turbine system. This redundancy ensures that the turbine can continue functioning reliably even in the presence of sensor failures.
WOC is happy to assist you with any of your GE requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.
FREQUENTLY ASKED QUESTIONS
What is DS3820PSCB?
It is a Power Supply Module manufactured and designed by General Electrics.
What is the purpose of the module?
It is to provide electrical power to a device or system. It typically includes a power supply unit (PSU), which converts AC power from an electrical outlet into DC power that can be used by the device or system. The module may also include additional components such as voltage regulators, filters, and fuses to ensure the power supplied is stable and safe.
What are the three independent coil servo valves controlled by each controller?
Each controller controls one of three independent coil servo valves for critical analog outputs.
How are errors detected in the servo valve system?
To determine the error signal for a servovalve, the analog signal is compared to a feedback signal.
What happens if one of the controllers fails?
If one of the controllers fails, the turbine continues to run under the control of the other two controllers.
