8272-781 Woodward overspeed protector

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Product basic information
Manufacturer: Woodward
Model: 8272-781
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
8272-781 controller has stable performance and high reliability

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8272-781 Woodward overspeed protector

The 8272-781 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 8272-781
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:
- 8272-781 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.

What is a microcontroller?

Although you may not know, there may be many such things in your home! A microcontroller is an integrated circuit (IC) or

“chip” typically used in devices with electronic circuits installed in households. You may have heard of microprocessors,

such as Intel Pentium, which are used as the CPU (central processing unit) in computers and are actually the “brain”.

A microprocessor is an integrated circuit used to process instructions in computer programs, perform calculations, and

send data to and from memory and disk. A microcontroller is a specific type of microprocessor. It differs from

ordinary microprocessors in the following aspects:

It has a built-in “I/O” (input/output) function. Therefore, it can read and write digital and analog values/states, and directly

connect to the “real world”. Unlike microprocessors, microcontrollers can be directly connected to switches, buttons, LCD displays, etc, LED， Relays and serial ports

Microcontrollers are typically used for specific tasks in devices with low to medium complexity. This is in stark contrast to

the powerful digital processing microprocessors used in PCs that handle various software applications.

Microcontrollers are typically used in portable devices that rely on battery power. Digital camera. Therefore, they typically

have low power consumption and low current consumption (unlike the cooling fans in desktop computers that cool microprocessors)

Compared to microprocessors in PCs, the RAM in microcontrollers typically ranges from 64k to a minimum of 1k.

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: 8272-781 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).
8272-781 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 8272-781Suitable 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.