Sidactor Protection Thyristor Products Page 51 SIDACtor Protection Thyristor Products

SIDACtor Protection Thyristors 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/17 YD/T 1082-2000 establishes the technical specifications on overvoltage and overcurrent protection of access network equipment for Mainland China. 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. The specifications as presented here are a succinct summary of the lightning surge, power fault, and ESD testing required by this document. The ports of the Network equipment are classified into five categories: 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: ESD --> EFT --> simulation of lightning strike --> power line induction --> power line contact The environmental conditions for ESD testing shall be: Temperature-15 C ~ 35 C Relative humidity-30% ~ 60% Air pressure -86 ~ 106 kPa 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. ESD Testing Table 3.45 Waveform Parameters Indicated Voltage Peak of Initiation of the Discharge Currents I p Time of Rising During Discharge Switch On / Off t r Current at 20 ms I 1 Current at 60 ns I 2 6 kV 22.5 A 30% 0.7-1 ns 12 A 30% 6 A 30% 30 s 0.1 I p I p I2 I1 0.9 I p I p 60 s t Figure 3.12 ESD Waveform Waveform of the generator should meet the requirements of ITU-T K.34. EFT (Electrically Fast Transient) Table 3.46 EFT Tested Port Number of Ports Test Conditions Remote Central Office I 1 - 1 kV, 5 kHz, > 1 min II 1 1 kV, 5 kHz, > 1 min III 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 Table 3.47 Lightning Surge Test Conditions Class of Port Number of Ports Voltage and Current Waveforms s Amplitude * Central Office Remote I - 3 10/700 - 5/310 4 kV 8 1.2/50 - 8/20 6 kV II 1 1.2/50 - 8/20 500 V III 1 1.2/50 - 8/20 500 V IV - 1 1.2/50 - 8/20 10 kV, 5 kA V 1 1.2/50 - 8/20 500 V * All tests are conducted 5 times with at least one minute between events. Table 3.48 Power Line Induction and Contact Testing Tested Port Number of Ports Test Conditions Remote Central Office I 3 - 600 V, 600, 50 Hz, 1 s I 1 - 220 V, 50 Hz, 1 h, 600/200/10 Regulatory Requirements (continued) Mainland China Standard - YD/T 1082-2000

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