8915-755 Woodward Ship Spare Parts

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Product basic information
Manufacturer: Woodward
Model: 8915-755
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
8915-755 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 8915-755 controller debugger module Motor touch screen WOODWARD

8915-755 Woodward Ship Spare Parts

The 8915-755 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 8915-755
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:
- 8915-755 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.

Processing method:

a、 If possible, turn the position feedback polarity switch to another position. (Can be used on some drives)

b、 If using a speedometer, swap and connect TACH+and TACH – on the driver.

c、 If using an encoder, swap and connect ENC A and ENC B on the drive.

d、 In HALL speed mode, swap HALL-1 and HALL-3 on the drive, and then swap Motor-A and Motor-B together.

Reason for malfunction: During encoder speed feedback, the encoder power supply lost power.

Solution: Check the connection of the 5V encoder power supply. Ensure that the power supply can provide sufficient current.

If using an external power source, ensure that the voltage is connected to the driver signal ground.

4. The LED light is green, but the motor does not move.

Reason for malfunction: The motor in one or more directions is prohibited from operating.

Solution: Check the+INHIBIT and – INHIBIT ports.

Reason for malfunction: The command signal is not grounded to the driver signal.

5. After power on, the LED light of the driver does not light up.

Reason for malfunction: The power supply voltage is too low, below the minimum voltage requirement.

Solution: Check and increase the power supply voltage.

6. When the motor rotates, the LED light flashes.

Reason for malfunction: HALL phase error.

Solution: Check if the motor phase setting switch (60/120) is correct. Most brushless motors have a phase difference of 120.

Reason for malfunction: HALL sensor malfunction

Solution: When the motor rotates, detect the voltage of Hall A, Hall B, and Hall C. The voltage value should be between 5VDC and 0.

Solution: Connect the command signal ground to the driver signal ground.

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: 8915-755 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).
8915-755 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 8915-755Suitable 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.