Why Choose the ABB eOVR T1-T2 4L 12.5-440s Surge Protective Device?
The ABB eOVR T1-T2 4L 12.5-440s (2TAM914000R5811) is a digital combined Type 1 and Type 2 surge protective device (SPD) designed for low-voltage electrical installations requiring protection against lightning currents and transient overvoltages. Its four-line configuration makes it suitable for three-phase power distribution applications where coordinated high-energy surge protection is required.
The eOVR T1-T2 4L 12.5-440s provides an impulse current Iimp of 12.5 kA per pole using the 10/350 µs waveform, together with a maximum discharge current Imax of 80 kA and nominal discharge current In of 20 kA using the 8/20 µs waveform. It is designed for 400/690 V AC systems and has a maximum continuous operating voltage Uc of 440 V.
As part of ABB’s intelligent eOVR family, this model combines surge protection with digital monitoring capabilities. It can record 20 surge events and 10 SPD remote-signal status changes, helping maintenance teams monitor surge activity and the condition of the protection system rather than relying solely on local visual inspection.
Key Advantages
- Combined Type 1 + Type 2 surge protection in a single device.
- 12.5 kA impulse current (Iimp) per pole using the demanding 10/350 µs waveform.
- 80 kA maximum discharge current (Imax) for high-energy transient protection.
- 20 kA nominal discharge current (In) using the 8/20 µs waveform.
- Designed for 400/690 V AC low-voltage electrical systems.
- 440 V maximum continuous operating voltage (Uc).
- 1.4 kV voltage protection level (Up) helps limit residual transient voltage.
- Digital recording of surge events and SPD remote-signal status changes.
- Combines lightning-current handling and downstream surge protection in one coordinated ABB solution.
Key Features
- ABB eOVR T1-T2 4L 12.5-440s digital SPD.
- ABB order code 2TAM914000R5811.
- Combined Type 1 and Type 2 surge protective device.
- Four-line protection configuration.
- 12.5 kA Iimp with 10/350 µs waveform.
- 80 kA Imax with 8/20 µs waveform.
- 20 kA In with 8/20 µs waveform.
- 400/690 V AC nominal system voltage.
- 440 V maximum continuous operating voltage (Uc).
- 1.4 kV voltage protection level (Up).
- Records 20 surge events.
- Records 10 SPD remote-signal status changes.
- Designed for integration into DIN-rail electrical distribution equipment.
Reliable Combined Lightning and Surge Protection
Combined Type 1 and Type 2 SPDs are designed to handle both high-energy lightning currents and lower-energy transient overvoltages within a coordinated low-voltage protection system. The Type 1 capability is demonstrated using the 10/350 µs impulse-current waveform, while Type 2 performance addresses transient currents characterised by the 8/20 µs waveform.
With an Iimp of 12.5 kA, Imax of 80 kA and In of 20 kA, the ABB eOVR T1-T2 4L 12.5-440s provides substantial surge-current handling capability. Its digital event-recording functionality also gives operators additional information about surge activity and SPD status, supporting inspection and maintenance of critical electrical installations.
Typical Applications
- Main low-voltage distribution boards.
- Three-phase 400/690 V AC electrical systems.
- Commercial and industrial electrical installations.
- Sites requiring combined Type 1 and Type 2 surge protection.
- Industrial machinery and automation installations.
- Electrical systems exposed to lightning-current and switching-transient risks.
