Why Choose the ABB eOVR T1-T2 3N 12.5-275S Digital Surge Protection Device?
The ABB eOVR T1-T2 3N 12.5-275S, order code 2TAM913100R5411, is an intelligent combined Type 1 and Type 2 surge protection device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. As part of ABB’s advanced eOVR digital surge protection range, it combines high-energy surge protection with integrated measurement, monitoring and communication functions.
Designed for three-phase systems with neutral, the eOVR T1-T2 3N 12.5-275S uses a 3+1 protection configuration and is rated for a nominal system voltage of 230/400 V AC. It provides an impulse current capability (Iimp) of 12.5 kA using the 10/350 µs waveform, a nominal discharge current (In) of 20 kA and a maximum discharge current (Imax) of 80 kA.
The device has a maximum continuous operating voltage (Uc) of 275 V AC and a voltage protection level (Up) of 1.4 kV. Its digital functionality enables monitoring of SPD condition and electrical parameters, helping facility operators assess protection status and plan maintenance through compatible ABB monitoring infrastructure.
Key Advantages
- Combined Type 1 + Type 2 surge protection in a single intelligent device.
- 12.5 kA impulse current capability using a 10/350 µs lightning-current waveform.
- 80 kA maximum discharge current for high-energy transient protection.
- 20 kA nominal discharge current for dependable surge protection.
- Low 1.4 kV voltage protection level helps protect downstream electrical equipment.
- Designed for 230/400 V AC three-phase systems with neutral.
- Digital monitoring provides greater visibility of SPD condition and surge events.
- Supports predictive maintenance by monitoring the remaining lifetime of the SPD.
Key Features
- ABB eOVR digital surge protection series.
- Combined Type 1 and Type 2 SPD.
- 3+1 protection configuration for three-phase systems with neutral.
- 230/400 V AC nominal system voltage.
- 275 V AC maximum continuous operating voltage (Uc).
- 12.5 kA impulse current Iimp (10/350 µs).
- 20 kA nominal discharge current In (8/20 µs).
- 80 kA maximum discharge current Imax (8/20 µs).
- 1.4 kV voltage protection level (Up).
- Digital monitoring of SPD lifetime and operating condition.
- Surge-event counting with event information for system monitoring.
- Monitoring of voltage, ambient temperature and earth-connection status.
- Designed for integration with compatible ABB Pro M InSite monitoring infrastructure.
Intelligent Protection Against Lightning and Transient Overvoltages
Combined Type 1 and Type 2 SPDs are designed to handle both high-energy lightning currents and lower-energy transient overvoltages within low-voltage installations. The ABB eOVR T1-T2 3N 12.5-275S provides this coordinated protection in one device, making it particularly suitable for installation near the origin of an electrical installation where lightning-current protection is required.
The eOVR platform extends conventional surge protection through integrated digital monitoring. It can monitor parameters including overvoltage and undervoltage conditions, SPD remaining lifetime, ambient temperature, surge-event count and earth-connection status. This information can be presented through compatible ABB Pro M InSite infrastructure, enabling maintenance teams to assess SPD health without relying solely on periodic visual inspection.
Typical Applications
- Main low-voltage distribution boards.
- Commercial building electrical installations.
- Industrial three-phase power distribution systems.
- Buildings equipped with external lightning protection systems.
- Smart buildings and digitally monitored electrical installations.
- Protection of automation, control and electronic equipment.
- Installations requiring Type 1 and Type 2 coordinated surge protection.
