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PD IEC/TR 62368-2:2015 Audio/video, information and communication technology equipment - Explanatory information related to IEC 62368-1, 2015
- 30321633-VOR.pdf [Go to Page]
- FOREWORD
- Clause 0 Principles of this product safety standard
- Clause 1 Scope
- Clause 2 Normative references
- Clause 3 Terms, definitions and abbreviations
- Clause 4 General requirements
- Clause 5 Electrically-caused injury
- Clause 6 Electrically-caused fire
- Clause 7 Injury caused by hazardous substances
- Clause 8 Mechanically-caused injury
- Clause 9 Thermal burn injury
- Clause 10 Radiation
- Annex A(informative) Background information related to the use of SPDs
- Annex B (informative) Background information related to measurement of discharges – Determining the R-C discharge time constant for X- and Y-capacitors
- Annex C (informative) Background information related to resistance to candle flame ignition
- Bibliography
- Figures [Go to Page]
- Figure 1 – Conventional time/current zones of effects of a.c. currents (15 Hz to 100 Hz) on persons for a current path corresponding to left hand to feet (see IEC TS 60479-1:2005, Figure 20)
- Figure 2 – Conventional time/current zones of effects of d.c. currents on personsfor a longitudinal upward current path (see IEC TS 60479-1:2005, Figure 22)
- Figure 3 – Illustration that limits depend on both voltage and current
- Figure 4 – Illustration of transient voltages on paired conductor external circuits
- Figure 5 – Illustration of transient voltages on coaxial-cable external circuits
- Figure 6 – Basic and reinforced insulation in Table 15 of IEC 62368-1:2014 –Ratio reinforced to basic
- Figure 7 – Reinforced clearances according to Rule 1, Rule 2, and Table 15
- Figure 8 – Example illustrating accessible internal wiring
- Figure 9 – Waveform on insulation without surgesuppressors and no breakdown
- Figure 10 – Waveforms on insulation during breakdownwithout surge suppressors
- Figure 11 – Waveforms on insulation withsurge suppressors in operation
- Figure 12 – Waveform on short-circuitedsurge suppressor and insulation
- Figure 13 – Example for an ES2 source
- Figure 14 – Example for an ES3 source
- Figure 15 – Overview of protective conductors
- Figure 17 – Touch current from a floating circuit
- Figure 18 – Touch current from an earthed circuit
- Figure 19 – Summation of touch currents in a PABX
- Figure 20 – Possible safeguards against electrically-caused fire
- Figure 21 – Fire clause flow chart
- Figure 22 – Prevent ignition flow chart
- Figure 23 – Control fire spread summary
- Figure 24 – Control fire spread PS2
- Figure 25 – Control fire spread PS3
- Figure 26 – Fire cone application to large component
- Figure 27 – Flowchart demonstrating the hierarchy of hazard management
- Figure 28 – Model for chemical injury
- Figure 29 – Direction of forces to be applied
- Figure 30 – Model for a burn injury
- Figure 31 – Model for safeguards against thermal burn injury
- Figure 32 – Model for absence of a thermal hazard
- Figure 33 – Model for presence of a thermal hazard with a physical safeguard in place
- Figure 34 – Model for presence of a thermal hazard with behavioural safeguard in place
- Figure 35 – Graphical representation of LAeq,T
- Figure 36 – Overview of operating modes
- Figure 37 – Voltage-current characteristics (typical data)
- Figure 38 – Current limit curves
- Figure 39 – Example of a dummy battery circuit
- Figure 40 – Example of a circuit with two power sources
- 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 varistorand 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
- Figure B.1 – Typical EMC filter schematic
- Figure B.2 – 100 MΩ oscilloscope probes
- Figure B.3 – Combinations of EUT resistance and capacitancefor 1-s time constant
- Figure B.4 – 240 V mains followed by capacitor discharge
- Figure B.5 – Time constant measurement schematic
- Figure B.6 – Worst-case measured time constant values for 100 MΩ and 10 MΩ probes
- Tables [Go to Page]
- Table 1 – General summary of required safeguards
- Table 2 – Time/current zones for a.c. 15 Hz to 100 Hzfor hand to feet pathway (see IEC TS 60479-1:2005, Table 11)
- Table 3 – Time/current zones for d.c. 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, d.c.,for large surface areas of contact in dry condition
- Table 6 – Insulation requirements for external circuits
- Table 7 – Voltage drop across clearance and solid insulation in series
- Table 8 – Examples of application of various safeguards
- Table 9 – Basic safeguards against fire under normal operating conditionsand abnormal operating conditions
- Table 10 – Supplementary safeguards against fire under single fault conditions
- Table 11 – Method 1: Reduce the likelihood of ignition
- Table 12 – Method 2: Control fire spread
- Table 13 – Fire barrier and fire enclosure flammability requirements
- Table 14 – Summary – Fire enclosure and fire barrier material requirements
- Table 15 – Control of chemical hazards
- Table 16 – Protection against radiation
- Table B.1 – 100 MΩ oscilloscope probes
- Table B.2 – Capacitor discharge
- Table B.3 – Maximum Tmeasured values for combinationsof REUT and CEUT for TEUT of 1 s [Go to Page]