9905-976

Overview

• Model Number : 9905-976

• Type : ProTech 203 Overspeed Protection System

• Manufacturer : Woodward

Electrical & Power Details

• Input Voltage :

• 120 Vac/dc = 88–132 Vac, 90–150 Vdc

• Power Consumption :

• 7.25 W

Operational Features

• Speed Calculation :

• Three individual speed calculations

• Two-out-of-three hardware vote for overspeed detection

• Response Time :

• 40 ms maximum

• Trip Relay Activation :

• Activated if two of three units detect overspeed

• Operator Interface :

• 1 Keypad and Display per Module

Configuration & Parameters

• Trip Speed Set Point :

• 250 rpm minimum, 25,000 rpm maximum

• MPU Fail Set Point :

• 100 rpm minimum, 25,000 rpm maximum

Environmental Conditions

• Operating Temperature :

• –25 to +60 °C

Dimensions

• Size :

• W: 482.6 mm x H: 310.4 mm x D:

System Design

• Modular Design :

• Units A, B, and C are identical with independent programming

• CPU Fail Indication :

• Included as part of the safety features

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