5501-371 Woodward overspeed protector

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Product basic information
Manufacturer: Woodward
Model: 5501-371
Belonging to the famous 505 series
Supports multiple communication protocols and can be smoothly integrated with the existing control system of the factory
Core application: Designed specifically for speed control and protection of steam turbines
5501-371 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 5501-371 controller debugger module Motor touch screen WOODWARD

5501-371 Woodward overspeed protector

The 5501-371 is a microprocessor-based digital governor controller produced by Woodward, belonging to its classic 505 series.
It is primarily designed for speed control and protection of steam turbines. Below is a detailed introduction to this product:

I. Product Overview

Brand and Model: Woodward 5501-371
Series: 505 Series Digital Governor
Type: Microprocessor-based controller
Purpose: Specifically designed for steam turbines to control their speed and provide overspeed protection.

II. Core Functions

Speed Control:
- 5501-371 Precisely controls the speed of steam turbines by adjusting steam inlet flow.
- Supports single-range or split-range actuators to accommodate turbines of different sizes.
Overspeed Protection:
- Incorporates triple independent overspeed protection logic to ensure rapid shutdown in case of overspeed, preventing equipment damage.
- Provides an overspeed test button for convenient on-site testing of protection functions.
Emergency Shutdown:
- Equipped with an emergency stop button for immediate shutdown in emergency situations.
System Protection:
- - Automatically switches control modes upon sensor failure to ensure uninterrupted system operation.
  - Offers local/remote control priority selection to adapt to different operational scenarios.

The working principle of CPU controller
The working principle of a CPU controller mainly includes the following steps:

(1) Instruction retrieval: The CPU retrieves instructions from memory and places them in the instruction register.

(2) Instruction decoding: The control unit decodes instructions to determine the type and operand of the instruction.

(3) Execute instructions: Based on the instruction type and operand, the CPU performs corresponding operations, such as arithmetic operations, logical operations, data transfer, etc.

(4) Storage result: Store the execution result in a register or memory.

(5) Update program counter: Update the program counter to the address of the next instruction.

(6) Repeat the above steps until the program is fully executed.

Performance indicators of CPU controller
The performance indicators of CPU controllers mainly include the following aspects:

(1) Main frequency: The operating frequency of the CPU, measured in Hertz (Hz), representing the number of instructions that the CPU can execute per second.

(2) Core count: The number of processor cores inside a CPU. A multi-core CPU can execute multiple instructions simultaneously, improving computational efficiency.

(3) Cache: High speed memory inside the CPU, used to store commonly used instructions and data, reduce the number of memory accesses, and improve computing speed.

(4) Instruction set: The types and quantities of instructions supported by the CPU, which affect the computing power and compatibility of the CPU.

(5) Power consumption: The amount of electricity consumed by the CPU during operation, which affects the energy consumption and cooling requirements of the computer.

III. Technical Specifications

Power Supply: 18-32 VDC, supporting 24VDC input.
Display: Two-line x 24-character LED display for clear indication of operating status and parameters.
Enclosure: NEMA 4X or IEC 60529 IP56 rated for protection against harsh industrial environments.
Inputs/Outputs:
- Inputs: 6 programmable current inputs, 16 discrete contact inputs.
- Outputs: 2 actuator outputs, 8 relay outputs, 6 programmable current outputs.
Communication Interfaces: 5501-371 Supports RS-232, RS-422, and RS-485 hardware interfaces for easy integration with host computers or other devices.
Software: Equipped with OpView™ and 505View software for parameter configuration, monitoring, and fault diagnosis.
Operating Temperature: -20 to +60°C (some models support -4 to +140°F).
Storage Temperature: -40 to +85°C (some models support -40 to +185°F).
5501-371 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 5501-371Suitable for steam turbines of various sizes, including industrial steam turbines, small grid turbo-generators, and turboexpanders.
Single Extraction and Admission Applications: Designed for operating steam turbines in single extraction and/or admission applications.
On-Site Programming: Allows on-site operators to program and adjust parameters through an integrated operator control panel, adapting to different operating conditions.

V. Product Advantages

High Reliability:
- Microprocessor-based design ensures precise control and stability.
- Triple independent overspeed protection logic provides multiple layers of safety.
Flexibility:
- Supports various actuator and sensor configurations to accommodate different turbine models.
- Offers a rich set of input/output interfaces for easy system expansion and integration.
Ease of Use:
- Two-line x 24-character LED display provides an intuitive operating interface.
- A 30-key multifunctional keyboard simplifies parameter configuration and operation.
Compatibility:
- Supports multiple communication protocols for easy integration with DCS, PLC, and other systems.
- Provides OpView™ and 505View software for remote monitoring and fault diagnosis.