IEC & EN General Introduction. by Ole Morten Aaslund

Transcription

1 IEC & EN General Introduction by Ole Morten Aaslund

2 What is it New safety standard Covering products currently under the scopes of IEC & EN and Components and subassemblies Accessories 2

3 What is it Hazard based Technology independent Having its own rationale document (IEC Technical Report IEC/TR ) 3

4 What is it NOT Not a simple merger of and Not a risk-based standard 4

5 Objectives Be performance based Type test standard Re-use of IEC basic standards Meet above in a user friendly manner 5

6 Three Block Model (for pain or injury) Hazardous Source Transfer Mechanism Body Part 6

7 Three Block Model (for Safety) Non- Hazardous Source No required Body Part Hazardous Source Safeguard Body Part 7

8 Levels of energy sources Class 1 energy source Class 2 energy source Class 3 energy source May be detectable, but is not painful nor is it likely to cause an injury. Ignition not likely. May be painful, but is not likely to cause an injury. Ignition possible, but limited growth and spread of fire. Capable of causing an injury. Ignition likely, rapid growth and spread of fire. 8

9 source classification Class 1: Level 1 energy under normal and abnormal conditions and level 2 under single fault conditions Class 2: Exceeding level 1 and not exceeding level 2 under all conditions Class 3: Exceeding level 2 9

10 source classification by declaration The manufacturer may declare a Class 1 energy source to be either a Class 2 energy source or a Class 3 energy source Safeguards shall be applied according to the declared class 10

11 source classification by declaration The line & neutral conductor is declared a Class 3 electrical energy source A protective conductor is a Class 1 electrical energy source and cannot be declared a higher class energy source 11

12 Hazards 12

13 Hazards Electric shock Fire Chemicals Mechanical Burn Radiation 13

14 Safety evaluation process The limit values for determining whether or not an energy source is hazardous are based on IEC Basic and Group safety publications. IDENTIFY ENERGY SOURCE IS SOURCE HAZARDOUS? YES IDENTIFY MEANS BY WHICH ENERGY CAN BE TRANFERRED TO A BODYPART NO The tests and parameters are based on IEC Basic and Group safety publications. DESIGN SAFEGUARD WHICH WILL PREVENT ENERGY TRANSFER TO A BODY PART MEASURE SAFEGUARD EFFECTIVENESS NO SAFEGUARD EFFECTIVE? YES DONE 14

15 What is a? SAFEGUARD 15

16 Safeguard Hazardous Source Basic Safeguard Supplementary Safeguard Body A BASIC SAFEGUARD is: A that is effective under normal and abnormal operating conditions whenever hazardous energy is present. A SUPPLEMENTARY SAFEGUARD is: A that is effective in the event of a single fault of any part, including a fault of the basic. 16

17 Safeguard Hazardous Source Reinforced Safeguard Body Part A REINFORCED SAFEGUARD is: A single, robust that is effective under normal operating conditions, abnormal operating conditions, and single fault condition. 17

18 Equipment Hazardous energy source Safeguard Body part 18

19 Installation Hazardous energy source Safeguard Body part 19

20 Personal Hazardous energy source Safeguard Body part 20

21 Behavioural Hazardous energy source Safeguard Body part Instructional Precautionary Skill 21

22 Persons Ordinary person: Instructed person: Skilled person: 22

23 Safeguard requirements Ordinary person Ordinary person class 3 Basic Supplemental class 1 class 2 Basic class 1 23

24 Safeguard requirements Instructed person Instructed person class 3 Basic Supplemental class 1 class 2 Instruction class 3 Basic Supplemental class 2 Instruction 24

25 Safeguard requirements Skilled person Skilled person class 3 Skill class 3 Unintentional contact class 2 Skill 25

26 Required s Required s Accessible by: Class I Detectable Class 2 Painful Class 3 Harmful Ordinary person None Equipment Equipment Instructed person None Behaviour Equipment Skilled person None Behaviour Behaviour 26

27 Questions? 27