Why Choose the ABB OVR T1-T2 4L 12.5-275s P QS Surge Protective Device?
The ABB OVR T1-T2 4L 12.5-275s P QS is a high-performance combined Type 1 + Type 2 surge protective device (SPD) designed to protect three-phase low-voltage electrical installations against lightning currents and transient overvoltages. Identified by ABB order code 2CTB815710R2300, this four-pole device forms part of the ABB OVR QuickSafe surge protection range and is designed specifically for TN-S electrical distribution systems.
This combined lightning and surge arrester provides an impulse current rating of 12.5 kA per pole using a 10/350 µs waveform, together with an 80 kA maximum discharge current and 30 kA nominal discharge current. ABB QuickSafe technology incorporates an end-of-life indicator and Safety Reserve functionality, helping maintain basic surge protection until a worn protection cartridge can be replaced.
With a 230/400 V AC nominal system voltage, 275 V AC maximum continuous operating voltage and 1.3 kV voltage protection level, the OVR T1-T2 4L 12.5-275s P QS provides robust protection for main electrical distribution boards. Its four-module pluggable design mounts on a standard 35 mm DIN rail and enables straightforward cartridge replacement without rewiring the complete surge protection assembly.
Key Advantages
- Combined Type 1 + Type 2 lightning and surge protection in one device.
- Four-pole configuration designed for three-phase TN-S electrical systems.
- 12.5 kA impulse current (Iimp, 10/350 µs) per pole for lightning-current protection.
- 80 kA maximum discharge current (Imax) for high-energy transient protection.
- 30 kA nominal discharge current (In) for dependable surge protection.
- Low 1.3 kV voltage protection level (Up) helps protect downstream equipment.
- ABB QuickSafe technology provides clear end-of-life indication.
- Safety Reserve functionality maintains basic protection pending cartridge replacement.
- Pluggable protection cartridges simplify servicing and maintenance.
- Compact four-module design for 35 mm DIN-rail mounting.
Key Features
- ABB OVR QuickSafe series.
- Type 1 + Type 2 / Class I + II surge protection.
- Four-pole configuration.
- Designed for TN-S low-voltage distribution systems.
- 12.5 kA impulse current (Iimp, 10/350 µs).
- 80 kA maximum discharge current (Imax, 8/20 µs).
- 30 kA nominal discharge current (In, 8/20 µs).
- 230/400 V AC nominal system voltage.
- 275 V AC maximum continuous operating voltage (Uc).
- 1.3 kV voltage protection level (Up).
- Integrated Safety Reserve and end-of-life indication.
- Replaceable plug-in protection modules.
- IP20 degree of protection.
- Four-module DIN-rail-mounted construction.
Combined Lightning and Surge Protection for TN-S Systems
Combined Type 1 + Type 2 SPDs are designed to manage both high-energy lightning currents and transient overvoltages within a coordinated protection device. The ABB OVR T1-T2 4L 12.5-275s P QS handles lightning impulse currents using the 10/350 µs waveform associated with Type 1 testing while also providing Type 2 protection against surge currents characterised by an 8/20 µs waveform.
Its four-pole architecture is designed for TN-S electrical systems, while ABB's QuickSafe technology provides visual end-of-life indication and Safety Reserve functionality. The pluggable design allows individual protection modules to be replaced while retaining the installed DIN-rail base and wiring, helping reduce maintenance time and simplify ongoing surge-protection servicing.
Typical Applications
- Main electrical distribution switchboards.
- Three-phase TN-S low-voltage distribution systems.
- Buildings equipped with external lightning protection systems.
- Commercial and industrial electrical installations.
- Manufacturing and process-control facilities.
- Industrial automation and machinery installations.
- Commercial buildings and infrastructure systems.
- Protection of sensitive electrical and electronic equipment.
- Installations requiring combined lightning-current and transient-overvoltage protection.
