IEC 62368-3:2017 pdf free download

IEC 62368-3:2017 pdf free download
IEC 62368-3:2017 pdf free download.Audio/video, information and communication technology equipment
6.3.1.1.3 Limits under single fault conditions
Under single fault conditions (see Clause B.4 of IEC 62368-1 :201 4) within a RFT-C circuit supply equipment, or a failure of the insulation between one conductor of the ICT network and earth, the current in an RFT-C circuit shall not exceed the line-to-earth and line-to-line limits given in Figure 1 . Moreover, the limits after 2 s are 25 mA and 60 mA, respectively.
Compliance is checked by inspection and measurement while simulating, one at a time, such failures of components and insulations as are likely to occur in the equipment, and failure of insulations between each connection point for the ICT network and earth. A resistor of 350 Ω ± 2 % is used between conductors and 2 000 Ω ± 2 % is used between one conductor and earth. In Figure 1, the time is measured from the initiation of the failure.
6.3.1 .1 .4 Limits with one conductor earthed
If one conductor of an RFT-C circuit that normally connects to a ICT network is accidentally earthed:
– the current between the other conductor and earth, measured through a 2 000 Ω ± 2 % resistor, under any external load condition, shall not exceed the relevant line-to-earth limit given in Figure 1 with a limit of 25 mA after 1 0 s; and
– the open circuit voltage between the other conductor and earth shall not exceed the maximum RFT-C circuit voltage determined in 6.3.1 .1 .2 c) and 6.3.1 .1 .2 d). The measurement is made after 2 s.
Compliance is checked by inspection and measurement.
6.3.1.2.2 Limits under single fault conditions
Under single fault conditions (see Clause B.4 of IEC 62368-1 :201 4) within a RFT-V circuit supply equipment, with and without any conductor of the RFT-V circuit that normally connects to an ICT network being earthed:
– during the first 200 ms, the output voltage between each conductor and earth or between conductors shall not exceed the limits of Figure 2, measured across a 5 000 Ω ± 2 % resistor with all load circuits disconnected; and
– after the first 200 ms, the limits of 6.3.1 .2.1 apply.
Compliance is checked by inspection and measurement while simulating failure of components and insulation such as are likely to occur in the equipment.