GE Mark IV DS3820PSCC1D1B Power Supply Unit

The DS3820PSCC1D1B is a power supply unit designed by GE for the Mark IV series. The Mark IV system is responsible for managing steam and gas turbine operations, utilizing integrated microprocessors to perform distributed control functions. These functions include start-up and shut down sequences, speed regulation, and temperature management while also protecting turbines from critical issues such as loss of flame, high pressure, and excessive vibration.

Design and Construction

The DS3820PSCC1D1B is a modified version of multiple DS3800 boards, built into a specialized housing with multiple openings. These openings serve two primary functions:

• Component Accessibility: Allowing easy access to internal elements for maintenance and adjustments.
• Heat Dissipation: Facilitating airflow to prevent overheating and ensure efficient cooling.

The frame includes drilled mounting points, allowing direct PCB installation using metal screws. In some cases, nylon spacers are used to maintain an air gap between the PCB and the housing. The housing also features flanges, with some bending inward and others outward, equipped with screw mounts and cutout tabs to enable secure attachment to other modules.

Components

The DS3820PSCC1D1B consists of both PCB-mounted and freestanding components:

• Terminal Strips: Two separate terminal strips, not attached to any PCB, provide structured circuit connections using screw-type connectors.
• Capacitors: Includes a large capacitor reinforced with a collar clamp, as well as polyester vinyl capacitors and other capacitor types.
• Additional Components:
  • Potentiometers
  • LED indicators
  • Thermistors
  • Amplifiers
  • Transistors
  • Spare PTH (Plated Through-Hole) connections

Large Components

The DS3820PSCC1D1B also integrates several large-scale components, including:

• Heat sinks to manage thermal efficiency
• Male and female connectors for secure electrical interfacing
• Transformers for voltage regulation
• Cable ties to neatly group and organize internal wiring

Specifications

This power supply unit is an essential component in the Mark IV control system, ensuring stable and reliable power distribution for turbine control applications.