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This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC - - Edition - REDLINE VERSION colour inside Safety requirements for electrical equipment for measurement control and laboratory use ?? Part - Particular requirements for control equipment INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS ISBN - - - - Warning Make sure that you obtained this publication from an authorized distributor Registered trademark of the International Electrotechnical Commission CThis is a preview - click here to buy the full publication ?? ?? IEC - - RLV ? IEC CONTENTS FOREW ORD INTRODUCTION Scope and object Normative references Terms and de ?nitions Tests Marking and documentation Protection against electric shock Protection against mechanical HAZARDS Resistance to mechanical stresses Protection against the spread of ?re Equipment temperature limits and resistance to heat Protection against HAZARDS from uids Protection against radiation including laser sources and against sonic and ultrasonic pressure Protection against liberated gases and substances explosion and implosion Components and subassemblies Protection by interlocks HAZARDS resulting from application RISK assessment Annexes Annex E informative Guideline for reduction of POLLUTION DEGREES Annex F normative ROUTINE TESTS Annex L informative Index of de ?ned terms Annex AA informative General approach to safety for control equipment Annex BB informative System drawing of isolation boundaries Annex CC informative Historical techniques for secondary circuits Annex DD informative Cross references between IEC - - and IEC or IEC - Annex DD normative Flammability test for magnesium alloy ?re ENCLOSUREs or ame barriers see Annex EE informative Information documentation and correlation to its uses Annex FF informative Measurement of CLEARANCES and CREEPAGE DISTANCES Bibliography Figure ?? Typical interface port diagram of control equipment Figure ?? Requirements for insulation between separate circuits and between circuits and ACCESSIBLE conductive parts Figure ?? Mechanical HAZARDS requirements for with regard to PANEL MOUNTED EQUIPMENT Figure ?? Safety enclosure with HMI installed through a wall Spread of ?re HAZARDS with regard to PANEL MOUNTED EQUIPMENT Figure ?? General temperature test environment CThis is a preview - click here to buy the full publication IEC - - RLV ? IEC ?? ?? Figure ?? Panel mounted HMI device extending through the wall of a cabinet Figure ?? Vented equipment Figure ?? Non-vented equipment Figure ?? Panel mounted device extending through the wall of a cabinet Figure AA ?? Control equipment access and safety concerns Figure BB ?? Typical system ENCLOSURE layout Figure BB ?? Simpli ?ed system schematic Figure BB ?? HAZARD situation of the control equipment Figure BB ?? Application of the standard to the control equipment safety drawing Figure BB ?? Application of items a and b to the control equipment safety drawing Figure BB ?? Application of items a b c and d to the control equipment safety drawing Figure BB ?? REINFORCED INSULATION Figure BB ?? BASIC INSULATION Figure BB ?? REINFORCED INSULATION BASIC INSULATION and limiting PROTECTIVE IMPEDANCE Figure BB ?? REINFORCED INSULATION from external power supplies Figure BB ?? BASIC INSULATION from external power supplies Figure EE