Security check
Please login to your personal account to use this feature.
Please login to your authorized staff account to use this feature.
Are you sure you want to empty the cart?

PD IEC TR 62368-2:2019 Audio/video, information and communication technology equipment - Explanatory information related to IEC 62368-1:2018, 2019
- undefined
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 0 Principles of this product safety standard
- Figures [Go to Page]
- Figure 1 – Risk reduction as given in ISO/IEC Guide 51
- 1 Scope [Go to Page]
- Figure 2 – HBSE Process Chart
- 2 Normative references
- 3 Terms, definitions and abbreviations [Go to Page]
- Figure 3 – Protective bonding conductor as part of a safeguard
- 4 General requirements [Go to Page]
- Figure 4 – Safeguards for protecting an ordinary person
- Figure 5 – Safeguards for protecting an instructed person
- Figure 6 – Safeguards for protecting a skilled person
- Tables [Go to Page]
- Table 1 – General summary of required safeguards
- Figure 7 – Flow chart showing the intent of the glass requirements
- 5 Electrically-caused injury [Go to Page]
- Figure 8 – Conventional time/current zones of effects of AC currents (15 Hz to 100 Hz) on persons for a current path correspondingto left hand to feet (see IEC TS 60479-1:2005, Figure 20)
- Figure 9 – Conventional time/current zones of effects of DC currents on persons for a longitudinal upward current path (see IEC TS 60479-1:2005, Figure 22)
- Table 2 – Time/current zones for AC 15 Hz to 100 Hz for hand to feet pathway (see IEC TS 60479-1:2005, Table 11)
- Figure 10 – Illustration that limits depend on both voltage and current
- Table 3 – Time/current zones for DC for hand to feet pathway (see IEC TS 60479-1:2005, Table 13)
- Table 4 – Limit values of accessible capacitance (threshold of pain)
- Table 5 – Total body resistances RT for a current path hand to hand, DC, for large surface areas of contact in dry condition
- Figure 11 – Illustration of working voltage
- Figure 12 – Illustration of transient voltages on paired conductor external circuits
- Figure 13 – Illustration of transient voltages on coaxial-cable external circuits
- Table 6 – Insulation requirements for external circuits
- Figure 14 – Basic and reinforced insulation in Table 14 of IEC 62368-1:2018; ratio reinforced to basic
- Figure 15 – Reinforced clearances according to Rule 1, Rule 2, and Table 14
- Table 7 – Voltage drop across clearance and solid insulation in series
- Figure 16 – Example illustrating accessible internal wiring
- Figure 17 – Waveform on insulation without surge suppressors and no breakdown
- Figure 18 – Waveforms on insulation during breakdown without surge suppressors
- Figure 19 – Waveforms on insulation with surge suppressors in operation
- Figure 20 – Waveform on short-circuited surge suppressor and insulation
- Figure 21 – Example for an ES2 source
- Figure 22 – Example for an ES3 source
- Figure 23 – Overview of protective conductors
- Figure 24 – Example of a typical touch current measuring network
- Figure 25 – Touch current from a floating circuit
- Figure 26 – Touch current from an earthed circuit
- Figure 27 – Summation of touch currents in a PABX
- 6 Electrically-caused fire [Go to Page]
- Figure 28 – Possible safeguards against electrically-caused fire
- Table 8 – Examples of application of various safeguards
- Figure 29 – Fire clause flow chart
- Table 9 – Basic safeguards against fire under normal operating conditions and abnormal operating conditions
- Table 10 – Supplementary safeguards against fire under single fault conditions
- Table 11 – Method 1: Reduce the likelihood of ignition
- Figure 30 – Prevent ignition flow chart
- Figure 31 – Control fire spread summary
- Figure 32 – Control fire spread PS2
- Figure 33 – Control fire spread PS3
- Table 12 – Method 2: Control fire spread
- Figure 34 – Fire cone application to a large component
- Table 13 – Fire barrier and fire enclosure flammability requirements
- Table 14 – Summary – Fire enclosure and fire barrier material requirements
- 7 Injury caused by hazardous substances [Go to Page]
- Table 15 – Control of chemical hazards
- Figure 35 – Flowchart demonstrating the hierarchy of hazard management
- 8 Mechanically-caused injury [Go to Page]
- Figure 36 – Model for chemical injury
- Figure 37 – Direction of forces to be applied
- 9 Thermal burn injury [Go to Page]
- Figure 38 – Model for a burn injury
- Figure 39 – Model for safeguards against thermal burn injury
- Figure 40 – Model for absence of a thermal hazard
- Figure 41 – Model for presence of a thermal hazard with a physical safeguard in place
- Figure 42 – Model for presence of a thermal hazard with behavioural safeguard in place
- 10 Radiation [Go to Page]
- Figure 43 – Flowchart for evaluation of Image projectors (beamers)
- Figure 44 – Graphical representation of LAeq,T
- Table 16 – Overview of requirements for dose-based systems
- Annexes [Go to Page]
- Annex A Examples of equipment within the scope of this standard
- Annex B Normal operating condition tests, abnormal operating condition tests and single fault condition tests
- Figure 45 – Overview of operating modes
- Annex C UV Radiation
- Annex D Test generators
- Annex E Test conditions for equipment containing audio amplifiers
- Annex F Equipment markings, instructions, and instructional safeguards
- Annex G Components
- Figure 46 – Voltage-current characteristics (Typical data)
- Figure 47 – Example of IC current limiter circuit
- Annex H Criteria for telephone ringing signals
- Figure 48 – Current limit curves
- Annex J Insulated winding wires for use without interleaved insulation
- Annex K Safety interlocks
- Annex L Disconnect devices
- Annex M Equipment containing batteries and their protection circuits
- Table 17 – Safety of batteries and their cells – requirements (expanded information on documents and scope)
- Figure 49 – Example of a dummy battery circuit
- Annex O Measurement of creepage distances and clearances
- Annex P Safeguards against conductive objects
- Annex Q Circuits intended for interconnection with building wiring
- Annex R Limited short-circuit test
- Annex S Tests for resistance to heat and fire
- Figure 50 – Example of a circuit with two power sources
- Annex T Mechanical strength tests
- Annex U Mechanical strength of CRTs and protection against the effects of implosion
- Annex V Determination of accessible parts
- Annex X Alternative method for determing clearances for insulation in circuits connected to an AC mains not exceeding 420 V peak (300 V RMS)
- Annex Y Construction requirements for outdoor enclosures
- Annex A (informative) Background information related to the use of SPDs
- Figure A.1 – Installation has poor earthing and bonding; equipment damaged (from ITUT K.66)
- Figure A.2 – Installation has poor earthing and bonding; using main earth bar for protection against lightning strike (from ITU-T K.66)
- Figure A.3 – Installation with poor earthing and bonding, using a varistor and a GDT for protection against a lightning strike
- Figure A.4 – Installation with poor earthing and bonding; equipment damaged (TV set)
- Figure A.5 – Safeguards
- Figure A.6 – Discharge stages
- Figure A.7 – Holdover
- Figure A.8 – Discharge
- Figure A.9 – Characteristics
- Figure A.10 – Follow on current pictures
- Annex B (informative) Background information related to measurement of discharges – Determining the R-C discharge time constant for X- and Y-capacitors
- Figure B.1 – Typical EMC filter schematic
- Figure B.2 – 100 MΩ oscilloscope probes
- Table B.1 – 100 MΩ oscilloscope probes
- Table B.2 – Capacitor discharge
- Figure B.3 – Combinations of EUT resistance and capacitance for 1 s time constant
- Figure B.4 – 240 V mains followed by capacitor discharge
- Figure B.5 – Time constant measurement schematic
- Table B.3 – Maximum Tmeasured values for combinations of REUT and CEUT for TEUT of 1 s
- Figure B.6 – Worst-case measured time constant values for 100 MΩ and 10 MΩ probes
- Annex C (informative) Background information related to resistance to candle flame ignition
- Bibliography [Go to Page]