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Description
概观
Essential details：8237-2597 ProTech-GII Overspeed Protection Device
The ProTech-Gll is an overspeed safety device designed to safely shut down steam, gas, and hydroturbines of all sizes upon sensing an overspeed or over-acceleration event. This device accuratelymonitors turbine rotor speed and acceleration via active or passive MPUs (magnetic pickups) and issuesa shutdown command to the turbine’s trip valve(s) or corresponding trip system.
The ProTech-Gll consists of three independent modules whose trip outputs, dependent upon model usedare either independent or voted in a 2-out-of-3 confiquration. An isolated bus architecture is used to shareall inputs and latch status information between the three modules. Optionally each ProTech-Gll modulecan be configured to use only its sensed “local” input signals or the voted result of all three modules’sianals in its event latch decision loaic, Optionally module trip and alarm latch statuses can also beconfigured to be shared with all other modules
The ProTech-Gll includes Overspeed and Over-acceleration functions as well as time stamped Alarm,and Trip logs. indication that a test was active at the time of the event is provided on all logs and first-outindications are provided for Trip logs. The ProTech-Gll also provides various pre-defined test routinesincluding an automated periodic test routine to assist users with verifying system operation.
There are several ways to interface with the ProTech-Gll. The front panel allows the user to view currentvalues, and to perform confiquration and test functions. All of the features and most of the information
8237-2597
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sunny He
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8237-2597 ProTech-GII Overspeed Protection Device
The ProTech-Gll is designed to be applied as an overspeed device for any size steam, gas, or hydroturbine, reciprocating engine, or plant process equipment. The device’s fast response time (8-26miliseconds depending on model and configuration), 0.5 to 80 000 RPM speed range, and integratedoverspeed and acceleration detection/protection functionality, make it ideal for application on critical low.speed or high-speed rotating motors, compressors, turbines or engines. This device accepts one speed(MPU or PROX) input per module
(3 total). in addition to the trip relay outputs, each ProTech-Gll module provides one relay output that isdedicated to an alarm function (3 total) and one analog speed output (3 total).
The ProTech-Gll utilizes a triple modular redundant architecture and 2-out-of-3 voting logic to accuratelydetermine unsafe conditions and ensure that no single-point failure will affect system reliability oravailability. With this desion, failures in overspeed svstem components (switches, transducers. modulesare detected, annunciated, and allowed to be repaired or replaced while the monitored svstem continuesto operate on-line. Optionally the ProTech-Gll can be configured to share and vote on all speed inputs asreguired by the application, The ProTech-Gll is designed for critical applications where both personnelsafety and unit availability (operation run time) is a concem or necessity.
The ProTech-Gll is certifed as an lEC61508 $lL-3 (Safety Integrity Level 3) safety device and can beapplied as a stand-alone lEC61508-based device or within an lEC61511-based plant safety system.
