Led Lighting Spd Design Installation Guide Page 5 LED Lighting SPD Design & Installation Guide

2015 Littelfuse LED Lighting SPD Module Design and Installation Guide www.littelfuse.com LED Lighting Surge Protection Modules Design and Installation Guide Service Equipment Service Equipment Location Category A Location Category B Location Category C Underground Service Outbuilding Subpanel Service Entrance Service Entrance Meter Figure 3. Location categories defined by IEEE standards for surge environments. The U.S. Department of Energy (DOE) Municipal Solid State Street Lighting Consortium (MSSLC) has developed a model specification that ensures roadway LED luminaires and parking lot and garage LED lighting exhibit adequate surge immunity to withstand indirect lightning energy. Cities, municipalities, and utilities in North America are adopting this model specification in their Requests for Quotes (RFQs) for lighting retrofit and replacement projects. The DOE specification details performance and surge suppression requirements as shown in Table 1 for two levels, Location Category C Low and C High. Table 1. 1.2/55 s - 8/20 s Combination Wave Specification Parameter Test Level/ Configuration 1.2/50s Open Circuit Voltage Peak Low: 6 kV. High: 10kV* 8/20s Short Circuit Current Peak Low: 3 kA. High: 10kA Coupling Modes L1 toPE, L2 to PE, L1 to 72 Polarity and Phase Angle Positive at 90 and Negative at 270 Test Strikes 5 for each Coupling Mode and Polarity/Phase Angle combination Time Between Strikes 1 minute Total Number of Strikes = 5 strikes 3 coupling modes 2 polarity/phase angles = 30 totaI strikes Category A: Parts of the installation at some distance from the service entrance Category B: Between Category A and Category C Category C: External part of structure, extending some distance into the building *This is a MINIMUM requirement. Note that for most combination wave generators, which have a source impedance of 2 , the generator charging voltage will need to be raised above the specified level (to somewhere in the vicinity of 20kV) to obtain the specified current peak. Indirect Lightning-Induced Surge (continued) 5

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