Why Choose the ABB OVR T2-T3 20-275 P TS QS Surge Protective Device?
The ABB OVR T2-T3 20-275 P TS QS is a compact combined Type 2 and Type 3 surge protective device (SPD) designed to protect low-voltage electrical installations and sensitive electronic equipment against transient overvoltages. Part of the ABB OVR QuickSafe surge protection range, it combines effective surge-current discharge capability with a low residual voltage level for protection close to sensitive equipment.
The OVR T2-T3 20-275 P TS QS provides a maximum discharge current (Imax) of 20 kA and a nominal discharge current (In) of 5 kA using an 8/20 µs waveform. It is designed for 230 V AC systems, has a 275 V AC maximum continuous operating voltage (Uc) and provides a low 0.9 kV voltage protection level (Up), helping protect sensitive downstream electrical and electronic equipment.
Its pluggable QuickSafe construction simplifies maintenance by allowing the protection cartridge to be replaced independently of the base. The TS remote signalling function provides auxiliary changeover contacts for external status monitoring, while the integrated end-of-life indicator allows straightforward local inspection. Its compact single-pole DIN-rail design makes it well suited to sub-distribution boards and installations close to sensitive terminal equipment.
Key Advantages
- Combined Type 2 and Type 3 surge protection in one compact device.
- 20 kA maximum discharge current (Imax) for transient surge handling.
- 5 kA nominal discharge current (In) using an 8/20 µs waveform.
- 275 V AC maximum continuous operating voltage.
- Low 0.9 kV voltage protection level (Up) for sensitive downstream equipment.
- Suitable for 230 V AC TT, TN-C and TN-S systems.
- QuickSafe technology with integrated thermal disconnection.
- Pluggable cartridge construction simplifies maintenance and replacement.
- Remote signalling contacts enable external monitoring of SPD status.
- Compact single-module design minimises DIN-rail space requirements.
Key Features
- ABB OVR T2-T3 QuickSafe surge protective device.
- Combined Type 2 + Type 3 protection.
- Single protected line.
- 20 kA Imax maximum discharge current.
- 5 kA In nominal discharge current.
- 2 kA Iimp impulse current using a 10/350 µs waveform.
- 230 V AC system application.
- 275 V AC Uc maximum continuous operating voltage.
- 0.9 kV voltage protection level (Up).
- Suitable for TT, TN-C and TN-S networks.
- Integrated thermal disconnector and end-of-life indicator.
- 1 NO + 1 NC auxiliary contacts for remote status signalling.
- Pluggable protection cartridge for straightforward servicing.
- Backup protection up to 125 A fuse or MCB.
- DIN-rail mounting with a compact 17.8 mm width.
Reliable Type 2 and Type 3 Protection for Sensitive Equipment
Combined Type 2 and Type 3 surge protective devices are designed for installation in sub-distribution boards or close to sensitive terminal equipment. Their Type 2 characteristics allow them to safely discharge currents generated by indirect lightning effects using the 8/20 µs waveform, while their Type 3 characteristics provide a low residual voltage suitable for protecting sensitive electronic equipment.
The ABB OVR T2-T3 20-275 P TS QS combines a 20 kA maximum discharge capability with a low 0.9 kV protection level, QuickSafe technology and a replaceable cartridge. Remote signalling contacts further allow SPD status to be incorporated into building, industrial or maintenance monitoring systems.
Typical Applications
- 230 V AC low-voltage electrical installations.
- Sub-distribution boards.
- Protection close to sensitive terminal equipment.
- Industrial control and automation panels.
- Commercial building electrical systems.
- Residential electrical distribution systems.
- Electronic control and monitoring equipment.
- Installations requiring remote SPD status monitoring.
- TT, TN-C and TN-S low-voltage networks.
