DS3820WGCA1B1A

SPECIFICATIONS

Part No.: DS3820WGCA1B1A
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Product Type: Printed Circuit Board
Availability: In Stock
Input Signal: AC Speed Sensor / Magnetic Pickup
Input Signal: Voltage 1–50 V Peak-to-Peak
Input Frequency: 0–20,000 Hz
Overspeed Trip Threshold: Approximately 110% of Rated Speed
Response Time: Less than 10 ms
Series: Mark IV

Functional Description

DS3820WGCA1B1A is a Printed Circuit Board developed by General Electric (GE) for the Mark IV Speedtronic Turbine Control System. It is part of an overspeed monitoring system designed to continuously monitor generator and turbine speeds, process speed sensor inputs, and initiate an overspeed trip when rotational speed exceeds the configured safety threshold. This module is an essential component for protecting gas and steam turbines from mechanical damage caused by overspeed conditions.

Key Features

• Genuine General Electric (GE) Mark IV module
• A Component of AC Generator Overspeed Control Module
• Designed for GE Mark IV Speedtronic turbine control systems
• High-speed overspeed detection circuitry
• Fast protective trip response
• Supports magnetic pickup speed sensor inputs
• High-density PCB with industrial-grade electronic components
• Multiple integrated circuits for signal processing
• Configurable DIP switches and jumpers for system setup
• LED status indicators for diagnostics
• Reliable operation in harsh industrial environments
• Easy installation and replacement during maintenance

Module Function

• Continuously receives speed signals from turbine or generator magnetic pickup sensors. These AC signals are conditioned, filtered, and converted into digital pulses for precise RPM calculation.
• If the measured speed exceeds the configured overspeed limit, the module immediately sends a trip signal to the Mark IV control system, allowing the turbine to shut down before mechanical damage can occur. Its fast response time makes it a critical safety component in turbine protection systems.

PCB Design and Hardware Configuration

Major hardware components include:

• Multiple industrial-grade integrated circuits (ICs)
• Signal conditioning circuitry
• Precision resistors and capacitors
• Crystal oscillator for timing accuracy
• Configurable DIP switch banks
• Multiple configuration jumpers
• PCB edge connector for Mark IV rack installation
• Diagnostic LEDs for operational monitoring
• High-quality soldered electronic components
• Protective mounting supports for vibration resistance

Overspeed Protection Operation

• Receives speed signals from magnetic pickup sensors
• Filters and conditions incoming AC signals
• Calculates real-time shaft speed
• Continuously compares measured speed against preset trip values
• Generates an immediate trip command when overspeed is detected
• Interfaces with the Mark IV protection system to safely shut down the turbine 

The WOC team is always available to help you with your Mark IV requirements. For more information, please contact WOC.

Frequently Asked Questions

What is DS3820WGCA1B1A?

It is a Printed Circuit Board developed by GE under the Mark IV series.

What is the primary function of this module?

Its primary function is to process speed sensor signals and initiate a protective trip if the turbine or generator exceeds the configured overspeed limit.

Which systems use this PCB?

The module is designed for GE Mark IV Speedtronic gas and steam turbine control systems.

How does the module detect overspeed?

It receives AC signals from magnetic pickup sensors, conditions the signals, calculates shaft speed, and compares the value to preset overspeed thresholds before issuing a trip command if necessary.

What are the benefits of using this module?

It provides accurate speed monitoring, rapid protective response, enhanced turbine safety, reliable long-term performance, and seamless compatibility with GE Mark IV control systems.