OVERSPEED MECHANICAL

SWITCH DEVICE

Reduce the risks at your hydro station by protecting the turbine from an over-speed condition with a mechanical over-speed device that acts independently from the electronic governor.

Overspeed Mechanical Switch Device Teste


The overspeed mechanical switch is a protection device that consists of a centrifugal pendulum and a trigger that are activated as a function of the turbine speed. Once the device is activated, it sends the command to close the turbine inlets (wicket gate, injectors, etc.) acting independ to the electrical command from the governor.

SPECIFICATIONS:

Specifications Overspeed Mechanical Switch Device_02

TYPE:

Electrical Contact: When activated, it only provides an electrical signal to the automation system.

Hydraulic Type: When activated, it provides a hydraulic emergency stopping of the turbine as well as an electrical signal to the automation system.

Mechanical Characteristics Electrical Characteristics

SYMBOL:

Symbol Overspeed Mechanical

DETAILS MECHANICAL OVERSPEED SWITCH DEVICE:

Hydraulic Type Actuating Device – Pressure Switch

Pressure Switch Mechanical Overspeed

Hydraulic Type Actuating Device – Limit Switch

Limit Switch Mechanical Overspeed

Hydraulic Contact Type Device (electric contact only)

Electric Contact Mechanical Overspeed

OVERSPEED CENTRIFUGAL PENDULUM:

Overspeed Centrifugal Pendulum

DIMENSIONS (mm):

Centrifugal Pendulum

Dimensions Centrifugal Pendulum

Electrical Contact Device

Dimensions Electrical Contact Device

Hydraulic Type Device

Dimensions Electrical Contact Device

MOUNTING:

Mounting Overspeed Mechanical Switch Device
Overspeed Device Setting

The pin displacement (mm) vs. speed curve (rpm) located in the factory manufacturing and test procedure defines the correct overspeed pin position relative to the turbine speed for any given project.

If you would like to discuss these features with a qualified engineer to better understand the advantages, please call our toll free number 1-877-7REIVAX. To Download this information, click on the “Download” button.

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