Conformity Magazine - March 2009 - (Page 26) • Mounted component: The component is mounted in a test fixture that corresponds to the expected equipment mounting. For thermally operated components, it is important to provide the same thermal environment as the equipment to have similar operate times. The technology Parts of 2564 define appropriate fixtures, usually PCBs, for component mounting. If the component is through-hole mount, the component is mounted upside down to check if the component desolders and falls out during testing. If the component is surface mount, the component is mounted vertically to check if the component desolders and slides down the PCB during testing. Cheesecloth wrapped round the fixture is used as a hazard indicator. For safety and draught reduction reasons, the test fixture may be mounted in an enclosure. Table 3 shows where the GR-1089-CORE Templates come from in terms of cable, port, document Clause and Figure. The four Template lines are shown in Figure 4. Besides graphical Template definition, Subject 2564 includes the Template line plot points for better precision. Although four templates are defined, Templates C and D are the same as Templates A and B except they are limited to 25 A. Customer Premises Port Type 3 is tested to Template A if the wiring is normal customer premises wiring, and to Template B if the wiring is 26 AWG or coarser. Table 4 shows where the UL 60950-1 and UL 1459 Templates come from in terms of document Clause and Figure number. The five Template lines are shown in Figure 5. Template A Standard Surge Generator and reference clause GR-1089-CORE Central Office, Port Type 1 and optionally Customer Premises Port Type 3 Longitudinal 1000, Primary protector limiting voltage (default >1000 V), >100 A, 25 in each polarity. GR1089-CORE, Issue 4 test clause 4.10.3.1 Longitudinal 10, >5000 V, >500 A, 5 in each polarity. GR-1089-CORE, Issue 4 test clause 4.6.8. Not tested if primary protection or construction meets exemptions of GR-1089-CORE, Issue 4, requirement R4-6 GR-1089-CORE Outside Plant Port Type 5 and optionally Customer Premises Port Type 3 Longitudinal 1000, Primary protector limiting voltage (default >1000 V), >100 A, 25 in each polarity. GR1089-CORE, Issue 4 test clause 4.10.3.1 Longitudinal 10, >5000 V, >500 A, 5 in each polarity. GR-1089-CORE, Issue 4 test clause 4.6.8. Not tested if primary protection or construction meets exemptions of GR-1089-CORE, Issue 4, requirement R4-6 GR-1089-CORE Internal only, Customer Premises Port Type 4 also Network Facilities Port Type 2 Longitudinal 10, >1500 V, >100 A, 1 in each polarity. GR-1089-CORE, Issue 4 test clause 4.6.9.1. Only for one- or two-pair ports OR Longitudinal 1.2/50-8/20 (combination wave generator), >1500 V, >100 A, 1 in each polarity (a generator series resistor of 10 Ω is specified). GR-1089-CORE, Issue 4 test clause 4.6.9.1.This test is for any number of pair ports. The resultant short-circuit waveform of 2.2/37, 1500 V, 125 A, makes this the most severe test option. GR-1089-CORE Internal only, Customer Premises Port Type 4 also Network Facilities Port Type 2 Longitudinal 10, >1500 V, >100 A, 1 in each polarity. GR-1089-CORE, Issue 4 test clause 4.6.9.1. Only for one- or two-pair ports OR Longitudinal 1.2/50-8/20 (combination wave generator), >1500 V, >100 A, 1 in each polarity (a generator series resistor of 10 Ω is specified). GR-1089-CORE, Issue 4 test clause 4.6.9.1.This test is for any number of pair ports. The resultant short-circuit waveform of 2.2/37, 1500 V, 125 A, makes this the most severe test option. UL 60950-1 UL 60950-1 UL 60950-1 Use TIA-968 clause 4 telephone line (lightning) surges Type A: transverse 560, >800 V, >100 A longitudinal 160, >1500 V, 2x>200 A Type B longitudinal 9/720, >1500 V—5/320, 1x>37.5 A UL 60950-1 clause 6.2.2.1 Impulse test uses a 10/700, 1.5 kV, 1x>37.5 A impulse, which is covered by the TIA968 testing Use TIA-968 clause 4 telephone line (lightning) surges Type A: transverse 560, >800 V, >100 A longitudinal 160, >1500 V, 2x>200 A Type B longitudinal 9/720, >1500 V—5/320, 1x>37.5 A B C D E F G H I UL 1459 UL 1459 Table 6: Lightning impulse tests and their related equipment standards 2 Conformity marCh 2009
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