Woodward QuickTrip User Manual

Manual 26815 QuickTrip Electro-Hydraulic Trip Block Assembly
Woodward 9
Chapter 1.
General Information
Introduction
The QuickTrip trip block assembly is designed for use in gas or steam turbine shutdown systems for quick
and reliable dumping of the turbine’s trip oil header. This integrated trip block assembly is intended for
use on mechanical-drive or generator-drive gas or steam turbines that use low-pressure (up to 34.5 bar /
500 psi) hydraulic trip oil headers.
The QuickTrip’s fault tolerant design makes it ideal for critical gas or steam turbine applications, where
turbine up-time and availability are essential. This trip block assembly’s 2-out-of-3 voting design provides
users with a very high level of system reliability as well as compliance with industry standard API-670.
This trip block assembly is designed to allow turbine controls and/or turbine safety systems to quickly
dump (bleed off) hydraulic header pressure during emergency trip or normal trip conditions. When applied
in conjunction with Woodward’s ProTechTPS logic solver, the QuickTrip allows users to independently
test each trip leg to verify operation and trip time. API-670 5th edition requires that all components except
for the final element (trip valve) shall be routinely tested while the turbine is in operation.
With the use of trip solenoids which respond in less than 50 milliseconds, the QuickTrip is designed for
gas or steam turbine trip systems where it is imperative the entire trip system shut the system trip valve
as quickly as possible.
The QuickTrip’s robust design (corrosion resistant materials, three independent moving rotary valves, and
self-cleaning port design) makes it optimal for challenging applications where dirty or contaminated oil
may be present.
The QuickTrip is certified for use in IEC61508 based turbine safety systems, and when paired with the
Woodward ProTechTPS, can be applied into systems that require a “Safety Integrity Level – 3” rating or
below.
Designed for use in new or retrofit turbine packages, the QuickTrip’s compact package size allows it to be
located near the turbine and trip & throttle valve, minimizing trip header piping and related system delays.
Each trip leg includes bright position indication LEDs (run & trip) to allow turbine operators to quickly
verify system status locally near the turbine as well as integrated limit switches for safety system and
plant DCS status and health validation.
The QuickTrip is an IEC61508 safety certified electro-hydraulic trip block assembly designed for use in
gas or steam turbine shutdown systems for quick and reliable dumping of the turbine’s trip oil header.
This trip block assembly’s 2-out of-3 voting design provides users with a high level of system reliability as
well as compliance with industry standards like API-670, API-612, and API-611.
This trip block assembly is housed in a fully integrated package which includes three patented dirt-
tolerant rotary trip valves. These valves are connected to provide redundant two-out-of-three based voting
to ensure that a failure of any one component (electronics module, valve, wiring, connector, etc.) does not
result in a nuisance trip condition. The QuickTrip’s modular design also allows users to replace critical
components (electrical module, solenoid, wiring, etc.) while the turbine is operating on-line.
Designed to quickly and reliably bleed off trip oil header pressure, at least two of the QuickTrip's three
rotary solenoid valves must be de-energized to open a bleed path from the trip oil header to system drain.
The QuickTrip accepts one or two (redundant) 24 Vdc power sources to power each solenoid, and uses
three independent discrete input shutdown commands from a safety logic solver like the Woodward
ProTechTPS (independent voted models) to test and control each solenoid valve.
Released

Woodward QuickTrip Specifications

General

Brand	Woodward
Model	QuickTrip
Category	Control Unit
Language	English