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Iec 60947 7 4 2019 pdf 1 This is a preview - click here to buy the full publication IEC - - Edition - REDLINE VERSION colour inside Low-voltage switchgear and controlgear ?? Part - Ancillary equipment ?? PCB terminal blocks for copper conductors INTERNATI

This is a preview - click here to buy the full publication IEC - - Edition - REDLINE VERSION colour inside Low-voltage switchgear and controlgear ?? Part - Ancillary equipment ?? PCB terminal blocks for copper conductors 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 ?? ?? F D IEC - - RLV IEC CONTENTS FOREW ORD INTRODUCTION Scope Normative references Terms and de ?nitions Classi ?cation Characteristics Summary of characteristics Type of PCB terminal block Rated and limiting values Rated voltages Rated current Standard cross-sections Maximum cross-section Connecting capacity Product information Marking Additional information Normal service mounting and transport conditions Constructional and performance requirements Constructional requirements Clamping units Mounting and installation Clearances and creepage distances Terminal identi ?cation and marking Resistance to abnormal heat and ?re Maximum cross-section and connecting capacity Performance requirements Temperature-rise current-temperature derating Dielectric properties Short-time withstand current Contact resistance Ageing tests Electromagnetic compatibility EMC Tests Kinds of test General Veri ?cation of mechanical characteristics General Attachment of the PCB terminal block on its support Vacant Veri ?cation of the maximum cross-section and connecting capacity Veri ?cation of maximum cross-section special test with gauges Veri ?cation of electrical characteristics General CThis is a preview - click here to buy the full publication F D IEC - - RLV IEC ?? ?? Veri ?cation of clearances and creepage distances Dielectric tests Veri ?cation of contact resistance Temperature-rise test current-temperature derating Short-time withstand current test Ageing tests Veri ?cation of thermal characteristics Veri ?cation of EMC characteristics General Immunity Emission Annex A informative Structure of a PCB terminal block Annex B informative Additional information to be speci ?ed between the manufacturer and the user B Additional information available on request of the user B Information for testing in addition to those mentioned above Annex C informative Examples of PCBs and PCB terminal blocks for high-current application C Layout of high-current PCBs schematic diagram C High-current PCB terminal blocks Bibliography Figure ?? Test assembly for the measurement of contact resistance and temperature-rise Figure ?? Example of wiring structure of a multi-tier PCB terminal block Figure ?? Test assembly for the measurement of short-time withstand current Figure ?? Test sequence Figure ?? Test sequence for PCB terminal blocks with contact pressure via insulating material Figure ?? Current cycling ageing test procedure Figure A ?? Structure of a PCB terminal block Figure C ?? Structure of a high current PCB Figure C ?? PCB terminal block with soldered connection to the PCB Figure C ?? PCB terminal block with screwed connection to the PCB Table ?? Standard cross-sections of copper conductors Table ?? Relationship between maximum cross-section and connecting capacity of PCB terminal blocks Table ?? Standards for clamping units and connecting methods Table ?? Tightening torques for PCB terminal blocks with screw-type clamping units Table ?? Impulse withstand