SIDACtor ® Protection Thyristors Mainland China Standard—YD/T 1082-2000 Mainland China Standard—YD/T 1082-2000 YD/T 1082-2000 establishes the technical specifications on overvoltage and overcurrent protection of access network equipment for Mainland China. Figure 3.12 ESD Waveform I This Chinese Standard parallels the ITU-T K series. This Standard specifies the technical requirements and test methods for overvoltage and overcurrent protection and the basic environmental adaptability of access network equipment. This Standard does not deal with protection against radiated electromagnetic fields. Ip 0.9 Ip I1 The specifications as presented here are a succinct summary of the lightning surge, power fault, and ESD testing required by this document. I2 The ports of the Network equipment are classified into five categories: 0.1 Ip t Ip 30 μs 60 μs I. Ports used to connect the twisted pairs introduced from outside of the building, namely analog user interface, ISDN-BRA interface, ADSL interface, and so on II. Twisted pair ports used to interconnect the different equipment inside the building, namely V.24 interface, V.35 interface, 2048 kbits/s interface connected to twisted pairs, 10/100 Base-T Ethernet interface, and so on III. Coaxial cable port: 2048 kbits/s interface connected to coaxial cables, ISDN-PRA interface, and so on IV. AC Power interface V. DC power interface The sequence of testing shall follow this order: EFT (Electrically Fast Transient) Waveform of the generator should meet the requirements of ITU-T K.34. Table 3.46 EFT ESD --> EFT --> simulation of lightning strike --> power line induction --> power line contact ESD Testing Number of Ports Tested Port Remote Central Office I 1 — 1 kV, 5 kHz, > 1 min Test Conditions II 1 1 1 kV, 5 kHz, > 1 min III 1 1 1 kV, 5 kHz, > 1 min IV 1 — 2 kV, 2.5 kHz, > 1 min V — 1 2 kV, 2.5 kHz, > 1 min VI — 1 2 kV, 2.5 kHz, > 1 min The environmental conditions for ESD testing shall be: Table 3.47 Lightning Surge Test Conditions t 5FNQFSBUVSF¡$_¡$ t 3FMBUJWFIVNJEJUZ_ Number of Ports t "JSQSFTTVSF_L1B Class of Port The waveform of the generator should meet the requirements of YD/T 950 as shown in table 3.45. Establish a communications link via any port of the EUT before the test. The communications link should be capable of normal use without being attended to manually after the test. Table 3.45 Waveform Parameters Indicated Voltage 6 kV Peak of Initiation of the Discharge Currents Ip Time of Rising During Discharge Switch On / Off tr 22.5 A ± 30% 0.7–1 ns © 2011 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Central Office I — Voltage and Current Waveforms μs Amplitude * 3 10/700 – 5/310 4 kV 8 1.2/50 – 8/20 6 kV Remote II 1 1 1.2/50 – 8/20 500 V III 1 1 1.2/50 – 8/20 500 V IV — 1 1.2/50 – 8/20 10 kV, 5 kA V 1 1 1.2/50 – 8/20 500 V * All tests are conducted ±5 times with at least one minute between events. Current at 20 ms I1 12 A ± 30% Current at 60 ns I2 Table 3.48 Power Line Induction and Contact Testing 6 A ± 30% Number of Ports Tested Port Remote Central Office I 3 — 600 V, 600Ω, 50 Hz, 1 s I 1 — 220 V, 50 Hz, 1 h, 600/200/10Ω 227 Revised: April 15, 2011 Test Conditions