The Suppressed Voltage Rating (SVR), SPD, 낙뢰보호기, 서지보호기

The Suppressed Voltage Rating (SVR) Is a value that is assigned to an SPD by UL to indicate its protective characteristics. Each mode of the SPD is subjected to three impulses of a 1.2/50μs, 6kV voltage waveform and a 8/20μs, 500A current waveform. The “measured limiting voltage” is measured at the ends of 6” leads extending from the terminals of an OEM product or 6” extending from the enclosure of a wall-mounted SPD. The average of these three measurements is then compared to the following chart and an SVR is assigned per each mode.

Average Measured Limiting Voltage Assigned SVR 330V or less 300V 331V ~ 400V 400V 401V ~ 500V 500V 501V ~ 600V 600V 601V ~ 700V 700V 701V ~ 800V 800V 801V ~ 900V 900V 901V ~ 1000V 1000V 1001V ~ 1200V 1200V 1201V ~ 1500V 1500V