Woodward ProTech 203, Руководство по эксплуатации

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Manual 85204 ProTech 203 Overspeed Protection System
Woodward 1
Chapter 1.
General Information
This manual describes the ProTech
®
electronic two-out-of-three Overspeed
Protection System. The manual explains the operation and gives the
configuration procedures for the system. This manual does not contain
instructions for the operation of the complete turbine system. For turbine- or
plant-operating instructions, contact the plant-equipment manufacturer.
Before doing any installation, maintenance, adjustments, or configuration on the
ProTech 203 system, read manual 82715,
Guide for Handling and Protection:
Electronic Controls, Printed Circuit Boards, Modules
.
Description
The ProTech 203 Overspeed Protection System is a digital overspeed trip device
that senses prime mover speed through three magnetic pickups (MPUs). It
consists of three identical, independent, speed-sensing units which continuously
monitor prime mover speed and activate a trip relay when an overspeed
condition is detected. The trip relays of the three units are connected in a two-
out-of-three voting configuration so that if any single unit fails, the ProTech
system will still provide the correct output. The units' functions include the ability
to display the actual speed from each speed probe, display the highest speed
signal, on-line testing, and modular design that allows a single failed unit to be
replaced while the device is running. Light emitting diodes (LEDs) and digital
displays on the unit front panel indicate the functional status.
Applications
The ProTech system can be ordered in either a de-energize-to-trip model or an
energize-to-trip model.
Woodward strongly recommends use of the de-energize-to-trip
model for reasons of general safety. With an energized-to-trip model,
the prime mover may not trip on loss of power. That failure to trip
may result in property damage or personal injury and loss of life.
However, Woodward recognizes that some applications will require
the energize-to-trip option.
Because Woodward recognizes that some installations will use energized-to-trip
models, all ProTech systems have been designed with components of the
highest quality and relays with operating characteristics that far exceed the
anticipated requirements of the device.
The ProTech system can also be configured to be compatible with various
combinations of power sources. Tables 1-1, 1-2, and 1-3 show the available
ProTech models, the corresponding part numbers, and the voltage ranges.