UL 1449 applies to Surge Protective Devices (SPDs) designed for the repeated limiting of transient voltage surges as specified in the standard on 50 or 60 Hz power circuits not exceeding 1000 V. The 4th edition standard specifies various tests that Original Equipment Manufacturer must pass to claim compliance and standard SPD’s must-have UL 1449 certifications to meet safety standards for specific markets.
UL 1449 4th Edition established Type 1 Surge Protection Devices to allow end-use customers to employ robust Prosurge SPDs into their AC power load centers with the comfort of knowing these devices are rated for the fault and safety test ratings of the circuit.
Prosurge PS and PSP series SPDs have surge capacity from 25kA per phase up to 900kA per phase. They have passed all of the short circuit current rating (SCCR) fault tests up to 200kA symmetrical amps and can be used in load center panels with similar exceptionally high ratings.
