Why Choose the ABB OVR T1-T2 3L 75-255 P TS Surge Protective Device?
The ABB OVR T1-T2 3L 75-255 P TS is a high-performance combined Type 1 and Type 2 surge protective device (SPD) designed for three-phase TN-C low-voltage networks. Installed at the origin or main distribution board, it provides protection against high-energy lightning currents and transient overvoltages that could otherwise damage electrical distribution equipment and sensitive downstream loads.
Designed for 230/400 V AC systems, the OVR T1-T2 3L 75-255 P TS provides an impulse current Iimp of 25 kA per pole using the 10/350 µs lightning-current waveform and a total impulse-current capability of 75 kA. It also provides a nominal discharge current of 25 kA and a maximum discharge current of 60 kA using the 8/20 µs waveform.
The device provides three protected poles for L1, L2 and L3 to PEN protection and incorporates pluggable protection modules, visual status indication and TS remote signalling. With a voltage protection level of 1.5 kV, a follow-current interrupting capability of 50 kA and robust DIN-rail construction, it is well suited to demanding commercial and industrial main-distribution applications.
Key Advantages
- Combined Type 1 + Type 2 protection against lightning currents and transient overvoltages.
- Purpose-designed for 230/400 V AC TN-C networks.
- 25 kA impulse current Iimp per pole using a 10/350 µs waveform.
- 75 kA total impulse-current capability across all three poles.
- 25 kA nominal discharge current using an 8/20 µs waveform.
- 60 kA maximum discharge current for high-capacity surge protection.
- Low 1.5 kV voltage protection level helps safeguard downstream equipment.
- TS remote signalling contact enables integration with monitoring and alarm systems.
- Pluggable construction simplifies servicing and replacement.
- Visual status indication allows convenient local condition monitoring.
Key Features
- ABB OVR T1-T2 series.
- Combined Type 1 + Type 2 / Class I + II surge protective device.
- Three-pole configuration for TN-C electrical systems.
- L-PEN protection mode.
- 25 kA impulse current Iimp per pole.
- 75 kA total impulse current Itotal.
- 25 kA nominal discharge current In.
- 60 kA maximum discharge current Imax.
- 1.5 kV voltage protection level Up.
- 264 V AC maximum continuous operating voltage Uc.
- 50 kA follow-current interrupting capability Ifi.
- Pluggable protection modules with visual status indication.
- 1 NO + 1 NC auxiliary contacts for remote signalling.
- 35 mm DIN-rail mounting for main distribution boards and switchgear.
Combined Lightning-Current and Surge Protection for TN-C Networks
Type 1 surge protective devices are designed to conduct the high-energy 10/350 µs impulse currents associated with lightning events, while Type 2 protection limits transient overvoltages represented by the 8/20 µs waveform. The ABB OVR T1-T2 3L 75-255 P TS combines both functions in a single three-pole assembly for coordinated protection at the entrance to a TN-C electrical installation.
Its 75 kA total impulse-current capability, 60 kA maximum discharge current and 1.5 kV protection level provide robust protection for downstream switchgear and electrical equipment. Pluggable construction, local visual indication and TS remote contacts also simplify maintenance and enable the SPD's operating condition to be incorporated into remote monitoring systems.
Typical Applications
- Main distribution boards in 230/400 V AC installations.
- Three-phase TN-C electrical distribution systems.
- Commercial and industrial buildings.
- Manufacturing plants and industrial facilities.
- Main switchboards and electrical switchgear assemblies.
- Installations exposed to lightning-current surges.
- Protection of downstream automation and electronic equipment.
- Installations requiring remote SPD status monitoring.
