ABB OVRT22L15320PU Overvoltage Protection Relay

ABB OVRT22L15320PU is a two-pole surge protective device (SPD) designed for DIN-rail installation in ABB System pro M Compact protection schemes, guarding 277 V AC networks against voltage transients. It provides a maximum continuous operating voltage (MCOV) of 320 V AC and a voltage protection rating (VPR) of 1.0 kV, with protection for both line-to-line and line-to-ground configurations (L-L and L-G). The unit supports 50/60 Hz operation, has a maximum discharge current of 15 kA (8/20 µs) and a nominal discharge current of 5 kA, and responds to surges in less than 25 nanoseconds. It is a 2P device with plug-in terminals, DIN-rail mounting, and a gray NEMA 1 enclosure, with dimensions of 35.6 mm wide, 64.8 mm deep, and 90.5 mm high. A cartridge state indicator provides quick status visibility, making it suitable for protecting downstream equipment in electrical installations such as control panels and distribution boards where fast transient suppression is required.