Installation Guide

© 2016 Littelfuse • LED Lighting SPD Module Design and Installation Guide www.littelfuse.com
LED Lighting Surge Protection Modules
Design and Installation Guide
Figure 5. This map of worldwide lightning frequency (courtesy of NASA Global Hydrology
Resource Center) depicts the number of lightning flashes/km
2
/year for various regions.
Incorporating a robust surge suppression circuit in an outdoor LED luminaire can eliminate
damage caused by surge energy, enhancing reliability, minimizing maintenance, and
extending the useful life of the lighting installation (Figure 6). A surge protection subassembly
that can suppress excessive surges to lower voltage levels is an optimal way to protect the
LED luminaire investment.
1. Fuse and inline fuse holder at pole base –
overcurrent protection for wiring in the pole
to the luminaire (may or may not be installed)
2. Thermal protection inside surge protection
module (SPD)
3. Fuse inside power supply – overcurrent
protection for power supply circuitry
2
1
3
LED Street Light Protection Scheme
Figure 6. LED street light protection scheme.
Regional Differences in Lightning Frequency (continued)
7