Installation Guide

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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. 1.2/55μs - 8/20μs Combination Wave Specification
Parameter Test Level/ Configuration
1.2/50µs Open Circuit Voltage Peak Low: 6 kV. High: 10kV*
8/20µs 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 2Ω,
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