8915-712 Woodward overspeed protector

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Product basic information
Manufacturer: Woodward
Model: 8915-712
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
8915-712 controller has stable performance and high reliability

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8915-712 Woodward overspeed protector

The 8915-712 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 8915-712
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:
- 8915-712 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 role of PLC controller

PLC (Programmable Logic Controller) controllers are mainly used to control machine equipment and automated production processes.

It can receive input signals from sensors, buttons, switches, etc., and output control signals after logical processing, achieving automation

control of industrial production processes. The main functions of a PLC controller are as follows:

Receiving and processing input signals: PLC controllers can receive input signals from different types of sensors, buttons, switches, etc.,

and perform logical processing to determine whether the input signals meet the set conditions.

Perform control operations: Based on the processing results of input signals and preset control logic, PLC controllers can perform various

control operations such as logic operations, timing control, counting control, analog processing, etc., and output control signals to control the operation of machine equipment.

Realize control of automated production processes: PLC controllers can achieve automation control of industrial production processes

such as automated assembly, automated packaging, automated chemical reactions, automated conveying, etc.

Programmable: PLC controllers have programmability, allowing users to write programs for different control tasks and modify and upgrade the programs as needed.

Stability and reliability: The PLC controller adopts a dedicated control chip and operating system, which has good stability and reliability,

and can work normally even in harsh working environments.

Flexibility: The input and output modules of the PLC controller can be expanded and modified as needed to adapt to different control tasks

and production requirements.

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: 8915-712 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).
8915-712 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 8915-712Suitable 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.