Why Choose the ABB eOVR T1-T2 3L 12.5-440s Surge Protective Device?
The ABB eOVR T1-T2 3L 12.5-440s, order code 2TAM913000R5811, is a digital combined Type 1 and Type 2 surge protective device (SPD) designed to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. Part of ABB’s eOVR digital surge protection range, it combines high-energy lightning current handling with effective downstream surge voltage limitation.
Designed for three-line installations, the eOVR T1-T2 3L 12.5-440s provides an impulse current Iimp of 12.5 kA per pole using a 10/350 µs waveform. It also provides a nominal discharge current In of 30 kA and a maximum discharge current Imax of 80 kA using an 8/20 µs waveform, enabling a single device to provide coordinated Type 1 and Type 2 surge protection.
With a nominal system voltage of 400/690 V AC and a maximum continuous operating voltage Uc of 440 V AC, this eOVR model is suited to demanding three-phase distribution systems. Its digital functionality supports integration with ABB monitoring solutions, providing enhanced visibility of surge protection status within modern commercial and industrial electrical installations.
Key Advantages
- Combined Type 1 and Type 2 surge protection in a single device.
- 12.5 kA impulse current Iimp per pole using a 10/350 µs waveform.
- 30 kA nominal discharge current In using an 8/20 µs waveform.
- 80 kA maximum discharge current Imax for high surge handling capability.
- Designed for three-line 400/690 V AC systems.
- Digital eOVR functionality supports connected surge protection monitoring.
Key Features
- ABB eOVR digital surge protection series.
- Combined Type 1 + Type 2 SPD.
- Three protected lines.
- 12.5 kA Iimp per pole at 10/350 µs.
- 37.5 kA total impulse current at 10/350 µs.
- 30 kA nominal discharge current In at 8/20 µs.
- 80 kA maximum discharge current Imax at 8/20 µs.
- 400/690 V AC nominal system voltage.
- 440 V AC maximum continuous operating voltage Uc.
- Designed for three-phase low-voltage distribution installations.
Combined Lightning Current and Surge Protection
Combined Type 1 and Type 2 SPDs are designed to handle the high-energy currents associated with lightning while also limiting transient overvoltages to protect downstream electrical and electronic equipment. This makes them particularly useful at the origin of installations where coordinated lightning current and surge protection is required within a single protective device.
The ABB eOVR T1-T2 3L 12.5-440s combines a 12.5 kA per-pole lightning impulse capability with an 80 kA maximum 8/20 µs discharge capability. Its three-line configuration and 440 V AC maximum continuous operating voltage make it suitable for compatible high-voltage three-phase low-voltage distribution networks.
Typical Applications
- Main low-voltage electrical distribution boards.
- Commercial building electrical installations.
- Industrial three-phase distribution systems.
- Installations requiring combined Type 1 and Type 2 surge protection.
- Buildings equipped with external lightning protection systems.
- Protection of sensitive electrical and electronic equipment.
- Industrial automation and control installations.
