Why Choose the ABB OVR T2 4L 40-275s P QS Surge Protective Device?
The ABB OVR T2 4L 40-275s P QS is a four-pole Type 2 surge protective device (SPD) designed to protect three-phase low-voltage distribution systems against transient overvoltages caused by indirect lightning effects and electrical switching events. Identified by ABB order code 2CTB815704R2300, it is designed for 230/400 V AC TN-S networks and provides protection across four lines.
This model combines varistor technology with ABB's patented QuickSafe technology and Safety Reserve system. The Safety Reserve function provides an additional protection stage when the primary protection stage reaches its end-of-life condition, allowing maintenance to be planned while reserve surge protection remains available.
The OVR T2 4L 40-275s P QS provides a 20 kA nominal discharge current (In) and 40 kA maximum discharge current (Imax) using an 8/20 µs waveform, together with a 275 V AC maximum continuous operating voltage (Uc) and 1.5 kV voltage protection level (Up). Pluggable cartridges and visual condition indication make the device straightforward to inspect and maintain.
Key Advantages
- Type 2 / Class II surge protection for three-phase TN-S electrical distribution systems.
- 20 kA nominal discharge current (In) using an 8/20 µs waveform.
- 40 kA maximum discharge current (Imax) using an 8/20 µs waveform.
- 275 V AC maximum continuous operating voltage (Uc).
- ABB Safety Reserve system provides a secondary level of protection to support planned maintenance.
- Patented QuickSafe technology incorporates integrated thermal disconnection.
- Pluggable protection cartridges simplify replacement and servicing.
- Visual status indication provides straightforward local inspection of protection condition.
Key Features
- ABB OVR T2 surge protection range.
- Type 2 / Class II surge protective device.
- Four protected lines / four poles.
- Designed for TN-S networks.
- 230/400 V AC nominal system voltage.
- 275 V AC maximum continuous operating voltage (Uc).
- 20 kA nominal discharge current (In, 8/20 µs).
- 40 kA maximum discharge current (Imax, 8/20 µs).
- 2 kA impulse current (Iimp, 10/350 µs).
- 1.5 kV voltage protection level (Up).
- ≤25 ns response time.
- 100 kA short-circuit withstand capability.
- ABB QuickSafe and Safety Reserve technologies.
- Integrated thermal disconnector and visual status indicator.
- Pluggable four-module construction for DIN rail installation.
Reliable Type 2 Protection with QuickSafe and Safety Reserve Technology
Type 2 surge protective devices are designed to discharge transient currents produced by indirect lightning strikes and electrical switching events. The ABB OVR T2 4L 40-275s P QS provides a 20 kA nominal discharge current and 40 kA maximum discharge current using the standard 8/20 µs waveform, while its 1.5 kV protection level helps limit transient voltage reaching downstream equipment.
ABB's Safety Reserve system provides an additional protection stage when the primary stage reaches its end-of-life condition, helping maintenance personnel plan cartridge replacement without immediately losing all surge protection. QuickSafe thermal disconnection, pluggable cartridges and visual status indication further support safe, efficient inspection and maintenance of the installed SPD.
Typical Applications
- 230/400 V AC TN-S electrical networks.
- Main low-voltage distribution switchboards.
- Intermediate and sub-distribution boards.
- Commercial building electrical installations.
- Industrial power-distribution systems.
- Automation and control panels.
- Three-phase installations requiring four-line Type 2 surge protection.
- Installations where Safety Reserve functionality supports planned SPD maintenance.
