DS3800NPPC1J1J - Power Supply Control Card

SPECIFICATIONS:

Part Number: DS3800NPPC1J1J
Manufacturer: General Electric
Series: Mark IV
Product Type: Power Supply Control Card
Input Voltage Range: 18 VDC – 36 VDC
Output Voltage(s): 5 VDC
Output Power Rating: 50W – 150W
Ripple & Noise: <50 mV
Isolation Voltage: 1500VDC
Operating Temperature: -20°C to +70°C
Size: 8.25 cm high x 4.18 cm
Repair: 3-7 days
Availability: In Stock
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS3800NPPC1J1J is a Power Supply Control Card manufactured and designed by General Electric as part of the Mark IV Series used in GE Speedtronic Gas Turbine Control Systems. It is designed to manage, regulate, and monitor the power supply that supports the operation of various control modules and peripheral devices. Typically found in systems requiring high reliability and continuous operation, the PSCC ensures that control electronics receive stable and clean power, protecting them from voltage fluctuations, overloads, and other electrical anomalies. The card often includes built-in diagnostics to monitor its health and that of the power distribution system, and it may also communicate status and fault conditions to the main control unit.

FUNCTIONS OF POWER SUPPLY CONTROL CARD:

Regulates and stabilizes input voltage to ensure consistent power delivery: The PSCC continuously adjusts and maintains the input voltage within a defined operational range. It uses voltage regulation techniques such as linear regulation or pulse-width modulation (PWM) to ensure that the output voltage remains steady even if the input fluctuates. This is essential for the safe and efficient performance of sensitive control system electronics.

Distributes controlled power to various subsystems and modules: After regulating the input voltage, the PSCC distributes the power to different components such as I/O modules, controllers, and communication cards. It ensures that each subsystem receives the required voltage and current, maintaining isolation where necessary to prevent interference or crosstalk between modules.

Monitors voltage, current, and temperature for safe operation: The card is equipped with sensors that continuously monitor critical electrical parameters. It checks for voltage levels on input and output lines, current consumption by connected modules, and temperature within the power supply circuitry. This real-time monitoring helps to ensure safe and optimal operating conditions and can detect early signs of failure.

Detects abnormal conditions such as overvoltage, undervoltage, or short circuits: The PSCC is designed to identify electrical anomalies that could damage the system. It can detect overvoltage conditions that may stress components, undervoltage conditions that may cause malfunction, and short circuits that could lead to immediate failure or fire hazards. Early detection allows the system to take corrective action before permanent damage occurs.

Initiates protective actions like power shutdown or alarm generation during faults: When abnormal conditions are detected, the PSCC initiates protective measures. These may include disconnecting the affected output channels, shutting down the card, or sending an alarm signal to the main controller or operator interface. This proactive response minimizes the risk of cascading failures and protects both equipment and personnel.

Supports redundancy by switching to backup power sources when necessary: In high-reliability applications, the PSCC often works with redundant power inputs or backup modules. If the primary source fails, the card can automatically switch to a secondary power source without interrupting system operation. This feature is especially critical in applications like turbine control, power generation, or process automation, where uptime is essential.

Enhances system reliability by preventing damage due to power anomalies: By performing all of the above functions—regulation, monitoring, protection, diagnostics, and redundancy—the PSCC plays a vital role in ensuring long-term system reliability. It acts as a safeguard against electrical disturbances and failures, significantly extending the life of the control system and minimizing unplanned outages.

WORKING PRINCIPLES OF POWER SUPPLY CONTROL CARD (PSCC):

The Power Supply Control Card operates by first receiving electrical power from an external AC or DC source. This input power is often unregulated or subject to fluctuations, so the card uses internal circuitry to condition it. The process begins with rectification, where alternating current (AC) is converted into direct current (DC), typically through the use of diodes. The rectified DC then passes through filtering stages, such as capacitors and inductors, which smooth out voltage ripples and eliminate noise. Following this, regulation circuits come into play—these may involve linear regulators for steady output or switching regulators (such as buck, boost, or buck-boost converters) to efficiently adjust the voltage level based on the system’s needs.

The PSCC continuously monitors parameters like input voltage, output voltage, current, and temperature using built-in sensors. These readings are processed by a control logic unit or microcontroller embedded on the card. If any reading falls outside of preset safe thresholds, the controller takes corrective action, either by adjusting the power conversion or triggering protection mechanisms such as shutting down specific outputs or generating an alarm.

Additionally, the card communicates with the main control system via data buses or serial interfaces, transmitting real-time status updates and diagnostic codes. In redundant setups, the PSCC also monitors the availability of backup power sources. If a failure is detected in the primary source, the control logic initiates a seamless switch to the secondary supply without affecting downstream systems. Throughout this process, LEDs or display indicators on the card provide visual feedback on operational status and fault conditions.

WOC maintains the largest inventory of replacement parts for GE Speedtronic Turbine Control Systems. Additionally, we offer warranty-backed unused and rebuilt boards as well as board repairs for your damaged ones. For your OEM needs, our team of professionals is available around the clock. We at WOC are happy to help you with any needs you may have in terms of automation. Please contact our team by phone or email for pricing and availability on any components and repairs.

FREQUENTLY ASKED QUESTIONS:

What is the accepted input voltage range for the GE Power Supply Control Card (PSCC)?

The majority of GE PSCC units are engineered to operate with a nominal input voltage of 125 VDC, accommodating an operational range typically spanning from 88 VDC to 140 VDC. This wide input tolerance allows seamless integration within varied industrial DC power environments. Certain PSCC models are also designed to function at 24 VDC input, contingent upon specific system requirements and configurations.

What regulated output voltages are delivered by the PSCC?

The PSCC delivers multiple regulated DC output voltages tailored to the control system’s diverse subsystems. Standard outputs commonly include +5 VDC to support digital logic circuits, ±15 VDC dedicated to analog signal processing, and +28 VDC utilized for energizing relays or other peripheral field devices.

By what means does the PSCC report operational status and fault conditions?

Status and fault diagnostics are communicated via integrated LED indicators on the card, providing immediate visual feedback regarding normal operation or detected anomalies. Additionally, the PSCC transmits diagnostic codes and status data to the primary control system through dedicated communication interfaces, enabling prompt fault identification and system troubleshooting by maintenance personnel.