Why Choose the ABB OVR T1-T2 12.5-440s P QS Surge Protective Device?
The ABB OVR T1-T2 12.5-440s P QS, order code 2CTB815710R4100, is a high-performance combined Type 1 and Type 2 surge protective device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. As part of the ABB OVR QuickSafe surge protection range, this single-pole device combines high-energy lightning-current protection with Type 2 surge suppression in a compact, pluggable DIN-rail format.
The device incorporates ABB's QuickSafe technology and Safety Reserve system, providing integrated thermal disconnection, end-of-life indication and continued basic protection through a reserve varistor before replacement is required. Its pluggable construction enables the protection cartridge to be replaced without changing the complete installed base, helping simplify preventative maintenance and minimise downtime.
With a maximum continuous operating voltage (Uc) of 440 V AC, 12.5 kA impulse current (Iimp), 20 kA nominal discharge current (In) and 80 kA maximum discharge current (Imax), the OVR T1-T2 12.5-440s P QS provides substantial surge-handling capability. A 1.9 kV voltage protection level (Up) helps limit residual transient voltage reaching downstream electrical and electronic 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.
- 20 kA nominal discharge current (In) for 8/20 µs surge currents.
- 440 V AC maximum continuous operating voltage (Uc).
- 1.9 kV voltage protection level (Up) helps protect downstream equipment.
- QuickSafe technology with integrated thermal disconnection and end-of-life indication.
- Safety Reserve system supports preventative maintenance and continued basic protection.
- Pluggable protection cartridge simplifies servicing and replacement.
Key Features
- ABB OVR T1-T2 QuickSafe surge protective device series.
- Combined Type 1 + Type 2 SPD.
- Single-pole / single protected-line configuration.
- Nominal system voltage: 400 / 690 V AC.
- Maximum continuous operating voltage (Uc): 440 V AC.
- Impulse current (Iimp, 10/350 µs): 12.5 kA.
- Nominal discharge current (In, 8/20 µs): 20 kA.
- Maximum discharge current (Imax, 8/20 µs): 80 kA.
- Voltage protection level (Up): 1.9 kV.
- 100 kA short-circuit withstand rating.
- Integrated thermal disconnector and end-of-life indicator.
- Safety Reserve function for preventative maintenance.
- Pluggable, replaceable protection cartridge.
- IP20 degree of protection.
- DIN-rail mounting and System pro M compact compatibility.
Combined Lightning and Surge Protection for Electrical Systems
Type 1 surge protective devices are designed to discharge high-energy lightning currents entering an electrical installation, while Type 2 protection limits transient overvoltages caused by indirect lightning effects and electrical switching. The ABB OVR T1-T2 12.5-440s P QS combines both functions, providing coordinated lightning-current and transient-overvoltage protection from a single DIN-rail-mounted device.
ABB's QuickSafe and Safety Reserve technologies add practical maintenance benefits. The pluggable cartridge can be replaced when required, while the integrated end-of-life indicator provides a clear visual indication of device condition. The Safety Reserve system maintains basic surge protection through an additional varistor when the primary protection stage reaches the end of its service life, allowing replacement to be planned while helping reduce unprotected downtime.
Typical Applications
- Main low-voltage electrical distribution boards.
- Sub-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 transient overvoltages.
