1 Scope
This standard specifies designed-in means aimed at preventing unexpected machine start-up to allow safe human interventions in danger zones (see Appendix A).
This standard applies to unexpected start-up from all types of energy source, i.e.:
– power supply, e.g. electrical, hydraulic, pneumatic;
stored energy due to, e.g., gravity, compressed springs;
– external influences, e.g. from wind.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative documents applies.
GB 5226.1-2002 Safety of Machinery - Electrical Equipment of Machines - Part 1: General Requirements (IEC 60204-1: 2000, IDT)
GB/T 15706.1-1995 Safety of Machinery - Basic Concept, General Principles for Design - Part 1: Basic Terminology, Methodology (GB/T 15706.1-1995 eqv ISO/TR 12100-1: 1992)
GB/T 15706.2-1995 Safety of Machinery - Basic Concept, General Principles for Design - Part 2: Technical Principles and Specifications (GB/T 15706.2-1995 eqv ISO/TR 12100-2: 1992)
GB/T 16856 - 1997 Safety of Machinery - Principles for Risk Assessment (GB/T 16856-1997 eqv prEN 1050: 1994)
3 Terms and Definitions
For the purposes of this standard, the terms and definitions given in GB/T 15706.1 and the following apply.
3.1
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Means for Isolation and Energy Dissipation
6 Other Measures to Prevent Unexpected Start-Up
Appendix A (Informative) Examples of Tasks Which Can Require the Presence of Persons in Danger Zones
Appendix B (Informative) Signalling and Warning
