Why Choose the ABB OVR T1-T2 3L 12.5-275s P QS Surge Protective Device?
The ABB OVR T1-T2 3L 12.5-275s P QS, order code 2CTB815710R1800, is a combined Type 1 and Type 2 surge protective device (SPD) designed to protect three-phase low-voltage electrical installations against high-energy lightning currents and transient overvoltages. Part of the ABB OVR QuickSafe surge protection range, it combines Type 1 lightning-current protection with Type 2 overvoltage protection in a compact three-pole DIN-rail-mounted assembly.
The device protects L1, L2 and L3 and is rated for 230/400 V AC systems. Its pluggable construction enables protection modules to be replaced when required, while ABB QuickSafe technology incorporates an end-of-life indicator and patented Safety Reserve system to support preventive maintenance and dependable operation.
With a maximum continuous operating voltage (Uc) of 275 V AC, an impulse current (Iimp) of 12.5 kA using a 10/350 µs waveform, a maximum discharge current (Imax) of 80 kA and a nominal discharge current (In) of 30 kA, the OVR T1-T2 3L 12.5-275s P QS provides substantial surge-handling capability. Its low 1.1 kV voltage protection level (Up) helps limit the residual voltage presented to downstream electrical equipment.
Key Advantages
- Combined Type 1 and Type 2 surge protection in one compact device.
- 12.5 kA impulse current (Iimp) for 10/350 µs lightning-current impulses.
- 80 kA maximum discharge current (Imax) for high transient-current capability.
- 30 kA nominal discharge current (In) for 8/20 µs surge currents.
- Low 1.1 kV voltage protection level (Up) helps protect downstream equipment.
- 275 V AC maximum continuous operating voltage (Uc).
- Three-pole design protects L1, L2 and L3 in three-phase installations.
- Pluggable protection modules simplify servicing and replacement.
- QuickSafe end-of-life indication and Safety Reserve support planned maintenance.
Key Features
- ABB OVR T1-T2 QuickSafe surge protective device series.
- Combined Type 1 + Type 2 SPD.
- Three-pole (3L) configuration.
- Nominal voltage (Un): 230/400 V AC.
- Maximum continuous operating voltage (Uc): 275 V AC.
- Impulse current (Iimp, 10/350 µs): 12.5 kA.
- Maximum discharge current (Imax, 8/20 µs): 80 kA.
- Nominal discharge current (In, 8/20 µs): 30 kA.
- Voltage protection level (Up): 1.1 kV.
- Combined spark-gap and varistor surge-protection technology.
- Pluggable, replaceable protection modules.
- QuickSafe end-of-life indication with Safety Reserve.
- DIN-rail mounting for System pro M compact installations.
- IP20 degree of protection.
Combined Lightning and Surge Protection for Three-Phase Systems
Type 1 surge protective devices are designed to discharge high-energy currents associated with lightning, while Type 2 devices protect against lower-energy transient overvoltages caused by indirect lightning effects and switching operations. The ABB OVR T1-T2 3L 12.5-275s P QS combines both functions, allowing it to provide coordinated protection at main or appropriate sub-distribution boards.
Its 1.1 kV protection level combines with high lightning-current and surge-current capability to help protect downstream installations. Pluggable modules simplify maintenance, while ABB's QuickSafe end-of-life indication and Safety Reserve system help maintenance personnel identify deterioration and plan replacement before complete loss of surge protection.
Typical Applications
- Three-phase 230/400 V AC electrical distribution systems.
- Main distribution boards requiring combined Type 1 and Type 2 protection.
- Industrial control and power distribution panels.
- Commercial and industrial buildings.
- Buildings with external lightning protection systems.
- Manufacturing and production facilities.
- Electrical installations exposed to lightning-induced and switching overvoltages.
