2CTB803973R1100

The ABB OVR T2 3N 40-275 P QS (2CTB803973R1100) is a Type 2 surge protective device designed to protect low-voltage electrical installations and connected equipment against transient overvoltages caused by indirect lightning effects and switching operations. It is suitable for three-phase 230/400 V AC distribution systems and is designed for use in electrical distribution boards in commercial, residential and industrial installations.

The device features a 3P+N configuration with four protected poles, a maximum continuous operating voltage of 275 V AC, a nominal discharge current of 20 kA and a maximum discharge current of 40 kA (8/20 μs waveform). Its plug-in cartridge design facilitates maintenance and replacement. The device provides a voltage protection level of 1.5 kV and supports TT and TN-S earthing systems. It is compatible with ABB System pro M compact modular equipment and is designed for 35 mm DIN-rail mounting.