ABB OVRT240550CU Overvoltage Protection Relay

ABB OVRT240550CU is a replacement cartridge for ABB OVRT surge protection assemblies used in 600 V AC distribution networks. The cartridge specifies a voltage rating of 600 V AC, with an MCOV of 660 V AC and a VPR of 1.9 kV, along with a maximum discharge current of 40 kA and a nominal discharge current of 20 kA, providing robust protection against transient overvoltages on the protected line. This replacement cartridge is designed for OVRT240550PTSU units, enabling field replacement of the cartridge rather than the entire protection module, which helps minimize downtime. Install and verify per ABB OVRT protection system guidelines to ensure correct integration within the protection scheme and reliable ongoing protection of downstream equipment.