Safety Information; Introduction; Terms And Abbreviations - GE Masoneilan SVI II ESD Installation And Maintenance Manual

1. Safety Information

Introduction

This section provides information necessary to design, install, verify and maintain a Safety
Instrumented Function (SIF) utilizing a Masoneilan Smart Valve Interface, SVI II ESD. This manual
provides necessary requirements for meeting the IEC 61508 or IEC 61511 functional safety
standards.

Terms and Abbreviations

The following terms and abbreviations are related to safety functions of the SVI II ESD and are
used throughout this document.
Safety
Functional
Safety
Basic Safety
Safety
Assessment
Fail-Safe State
Fail Safe
Fail Dangerous
© 2016 General Electric Company. All rights reserved.
Freedom from unacceptable risk of harm.
The ability of a system to carry out the actions necessary to achieve or to main-
tain a defined safe state for the equipment / machinery / plant / apparatus
under control of the system.
The equipment must be designed and manufactured such that it protects
against risk of damage to persons by electrical shock and other hazards and
against resulting fire and explosion. The protection must be effective under all
conditions of the nominal operation and under single fault condition.
The investigation to arrive at a judgment - based on evidence - of the safety
achieved by safety-related systems.
State where the SVI II ESD is de-energized and has exhausted Actuator 1 in a sin-
gle acting configuration or has caused Actuator 1 to be at an equal or lower
pressure than Actuator 2 in a dual acting configuration.
Failure that causes the valve to go to the defined fail-safe state without a
demand from the process.
Failure that does not respond to a demand from the process (i.e. being unable to
go to the defined fail-safe state).
Masoneilan SVI II ESD Installation and Maintenance Manual
| 17
=