Description

Woodward 8237-1597 ProTech-GII partition installation, HV/HV, voting relay, voting input

Depending on the model purchased, the ProTech-GII comes in a partition mounted or panel mounted enclosure package. The partition mounted housing model is designed for installation on walls or bases next to turbines or equipment, rated for IP56 based environments. For these models, field wiring access is done through a gland plate located at the bottom of the casing. Figures 2-1, 2-2, and 2-3 show the physical layout and installation mode of the ProTech-GII model with partition installation. Woodward Safety System Industrial Application Safety System

 

ProTech-GII is a configurable overspeed detection system designed to safely shut down various sizes of steam, gas, and hydraulic turbines when overspeed or over acceleration events are detected. Provide two dual redundant trip relay outputs using a two out of three voting architecture, or three independent non voting trip relay outputs with separate alarm relays, 4-20 mA speed readings, and Modbus ® Communication makes it possible for this overspeed device to be easily integrated into any turbine safety system. This ProTech GII model is a partition mounted, high-voltage/high-voltage power input, voting relay/voting input safety device used for steam turbine overspeed protection.

 

Features and functions

Acceleration detection

ProTech-GII can also be configured to protect turbines from high acceleration events. The derivative of the speed signal is used to detect turbine acceleration and issue related tripping commands.

Host detection

 

The speed sensor input of each module uses a special MPU open circuit detection circuit to verify whether the MPU is correctly connected before turbine operation, and uses a special speed loss detection logic to verify the MPU function during turbine operation.

Automatic overspeed test program

You can choose to configure ProTech-GII to perform routine overspeed testing on each module, and then record and report the test results. Through this testing routine, each module uses an internal frequency generator to simulate overspeed conditions and complete its testing sequence.

Resistance to sulfur pollution

ProTech-GII uses a special conformal coating material that demonstrates excellent long-term protection against H2S and SO2 gases in the international standard IEC 721-3-1994- Environmental Class 3C2.

Online maintenance

The triple modular design of ProTech-GII allows users to easily replace one of the modules (A, B, C) while the turbine is online and running normally. The device’s backplane plug and play structure and its module to module learning function enhance the convenience of replacement. We believe that the created learning environment will help our students prepare for college. The following pages contain high school curriculum arrangements and course guides, which can serve as sources of information for academic issues such as curriculum arrangements, graduation requirements, academic honors, and semester exam policies for 9th to 12th grade students. In addition, it also provides lists and descriptions of various courses for senior students. Students and parents should use this guide to plan overall course learning completed during high school.

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