Sidactor Protection Thyristor Products Page 36 SIDACtor Protection Thyristor Products

SIDACtor Protection Thyristors 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/17 Table 3.9: Intra-building lightning surge test for 2-wire interfaces First Level Intra-building surges Intra-building tests are not required for: 1. Intra-building wiring connecting equipment separated by a distance of 6 m or less within the same frame or cabinet 2. Intra-building wiring that is not grounded and has no power ports 3. Intra-building wiring used exclusively for maintenance purpose There are two separate intra-building surge setups, one for ports having 2 ports or less (Table 3.9), and another one for ports having more than 2 ports (four conductors, Table 3.10). Test Surge Voltage (V PK ) Waveform ( s) Surge Current (per Conductor) (A) Repetitions Each Polarity Test Connections 1 800 2x10 100 1 A1, A2 2 1500 2x10 100 1 B Notes: 1. For EUT containing secondary voltage limiting and current limiting protectors, tests are to be performed at the indicated voltage(s) and repeated at a reduced voltage and current just below the operating threshold of the secondary protectors. 2. Surge test 1 is not applicable to Ethernet ports IF the port does not contain secondary protection referenced to ground and all unused pins of the port are not grounded. Intra-building lightning surge tests for ports with more than two pairs (four conductors) take into account the dividing factor of multiple wires in parallel. See Table 3.10 and Figure 3.2. Table 3.10: First Level Intra-building Lightning Surge Test for EUT with greater than 2 pairs (four conductors) Test Surge Voltage (V PK ) Number of Pairs Value of external R (ohm) Repetitions Each Polarity Test Connections 1 800 3 or 4 6 1 See Figure 3.2 (M) 2 1500 3 or 4 20 1 See Figure 3.2 (L) 1 800 > than 4 6 1 See Figure 3.2 (M) 2 1500 > than 4 20 1 See Figure 3.2 (L) Notes: 1. For EUT containing secondary voltage limiting and current limiting protectors, tests are to be performed at the indicated voltage(s) and repeated at a reduced voltage and current just below the operating threshold of the secondary protectors. 2. The combination wave 1.2x50/8x20 waveshape with a 2-ohm internal impedance generator as defined in IEEE C62.41.2 shall be used. Figure 3.2: Surge Generator Setup Metallic test applies to one conductor at a time R Surge Generator 1.2x50/8x20S (M) Metallic EUT R Surge Generator 1.2x50/8x20S (L) Longitudinal EUT Regulatory Requirements (continued)

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