Selecting the correct SPD depends on your application environment, system voltage, and the required level of protection. Use the following guide for an initial selection: Application Scenario Recommended Series Key Features & Rationale Residential (Homes) POSP 20 Plug-on design for easy installation; 20kA nominal discharge current is sufficient to handle lightning strikes and utility switching transients [...]

A1: Prosurge offers a comprehensive SPD product line to address needs ranging from residential to mission-critical infrastructure. The main series and their positioning are as follows: POSP 20 Series: Plug-on UL1449 Type 1 SPDs designed for residential and light commercial applications. They can be directly plugged into mainstream load centers (breaker panels), providing convenient primary protection [...]

Based on UL 1449:2021 Ed.5 (Surge Protective Devices) A: The 5th Edition defines six categories, based on installation location and component completeness： Type 1 (Listed, field-installable): Permanently connected SPDs for installation between the service transformer and the line side of the main service overcurrent device, or anywhere downstream. Includes watt-hour meter socket types and Molded Case SPDs that do [...]

The following examines a few of the key differences between Underwriters Laboratory’s required test for surge protective devices (SPDs); ANSI/UL 1449 Third Edition and the International Electrotechnical Commission (IEC) required test for SPDs, IEC 61643-1. Short Circuit Current Rating (SCCR): The capacity of current with which the tested SPD can withstand at the terminals where connected, [...]

Choosing the right surge arrester(s) is a key factor to guarantee correct protection of the installation. A poorly designed Lightning & Surge protection system may lead to early ageing of the SPD and potential failure of the protective devices in the installation allowing damage to the primary systems up stream, thus defeating the rationale behind the [...]

Photovoltaic systems are technologically highly sensitive and a direct lightning strike would definitely destroy it. There is also yet another hazard,as a lightning strike could create surge voltage near the solar power system and these surge voltages can also destroy the system. The inverter is the primary point in need of protection. Usually, inverters will integrate [...]

In the past, some manufacturers have used joule ratings in their specifications. They are not considered a good indicator for SPD performance and not recognized by any standard organizations. Prosurge doesn’t support this specification also.

Response time specifications are not supported by any standards organizations overseeing Surge Protective Devices.IEEE C62.62 Standard Test Specification for SPDs specifically mentions it should not be used as a specification.

The US power distribution system is a TN-C-S system. This implies that the Neutral and Ground conductors are bonded at the service entrance of each, and every, facility or separately derived sub-system. This means that the neutral-to-ground (N-G) protection mode within a multi-mode SPD installed at the service entrance panel is basically redundant. Further from this [...]

The installation of SPDs is often poorly understood. A good SPD, incorrectly installed, can prove of little benefit in real-life surge conditions. The very high rate-of-change of current, typical of a surge transient, will develop significant volt drops on the leads connecting the SPD to the panel or equipment being protected. This can mean higher than [...]