Led Design Guide Page 13 LED Design Guide

2015 Littelfuse LED Lighting Design Guide www.littelfuse.com LED Lighting Design Guide In the US, ANSI/IEEE C.62.41-2002 is a very important specification to consider, because it is either the primary or secondary reference for surge immunity testing. This standard defines four lighting location categories and associated transient surge testing requirements. The categories correspond to the physical location of the LED luminaire whether located indoors or outdoors. For instance, the outdoors luminaires that fall into Category C (high or low test requirements) are far more susceptible to lightning strikes and hence will be subject to the most stringent surge immunity testing. Figure 7 illustrates these locations. Table 3 is a summary of the IEEE C.62.41-2002 surge levels and where they apply. Location Category Pk Voltage (kV) Pk Current (kA) Source Application Waveform 1.2/50s 8/20s Impedance (Ohms) A (Indoors) 6 0.5 12 Indoor Commercial Bldg/ Offices/ Retail B 6 3 2 Lighting near Service Entrance C Low 6 3 2 Commercial/ Industrial/ Parking Garage C High (Outdoors)* 20 10 2 Street/ Hwy/ Parking Lot/ Area Flood/ Outdoor Location Category Pk Voltage (kV) Pk Current (kA) Source Waveform 0.5s 100kHz Ring Wave Impedance (Ohms) A (Indoors) 6 0.2 30 B 6 0.5 12 C Low or High 6 0.5 12 *A combination waveform where specified peak current is calibrated on the tester by shorting the output together prior to connection to the luminaire. Single phase modes: L-N L-G N-G. Polyphase Modes: L-L L-N L's-G Table 3. IEEE C.62.41-2002 test requirements for LED luminaires. Figure 7. Lighting locations defined by ANSI/ IEEE C.62.41-2002, which determine the type of protective devices needed in an LED luminaire. LED Lighting Compliance with Global Standards (continued) 13

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