Why Choose the ABB OVR T1-T2 4L 12.5-440s P QS Surge Protective Device?
The ABB OVR T1-T2 4L 12.5-440s P QS is a high-performance combined Type 1+2 surge protective device (SPD) designed to protect low-voltage electrical installations against lightning currents and transient overvoltages. As part of the advanced ABB OVR QuickSafe surge protection range, it combines Type 1 lightning current protection and Type 2 surge protection in a four-pole device for demanding three-phase electrical systems.
Designed for four-line three-phase installations, the OVR T1-T2 4L 12.5-440s P QS is suitable for IT and TN-S low-voltage distribution systems. Its pluggable construction simplifies maintenance and replacement, while the reserve-varistor design provides additional protection by maintaining basic surge protection when the primary protection element reaches the end of its service life.
With an impulse current (Iimp) of 12.5 kA per pole using a 10/350 µs waveform, maximum discharge current (Imax) of 80 kA per pole using an 8/20 µs waveform, nominal discharge current (In) of 20 kA and a 440 V AC maximum continuous operating voltage, the OVR T1-T2 4L 12.5-440s P QS provides robust protection for 400 / 690 V AC systems. The device is supplied under ABB order code 2CTB815710R5200.
Key Advantages
- Combined Type 1+2 surge protective device for lightning current and transient overvoltage protection.
- Four-pole configuration for suitable three-phase electrical systems.
- 12.5 kA impulse current Iimp (10/350 µs) per pole.
- 80 kA maximum discharge current Imax (8/20 µs) per pole.
- 20 kA nominal discharge current In (8/20 µs).
- 440 V AC maximum continuous operating voltage.
- Suitable for 400 / 690 V AC IT and TN-S systems.
- Reserve-varistor technology maintains basic protection at the end of the primary varistor's service life.
- Pluggable construction simplifies inspection, maintenance and replacement.
Key Features
- ABB OVR T1-T2 QuickSafe surge protection series.
- Combined Type 1+2 surge protective device.
- Four protected poles.
- 12.5 kA Iimp per pole lightning impulse current capability.
- 80 kA Imax per pole maximum discharge current.
- 20 kA In nominal discharge current.
- 1.9 kV voltage protection level (Up).
- 400 / 690 V AC nominal system voltage.
- 440 V AC maximum continuous operating voltage (Uc).
- Integrated reserve-varistor protection for enhanced continuity of protection.
- Compatible with the ABB System pro M compact range.
- DIN-rail mounting and pluggable construction for straightforward installation and servicing.
Combined Lightning and Surge Protection for Three-Phase Installations
Combined Type 1+2 surge protective devices provide protection against both high-energy lightning currents and transient overvoltages. Type 1 capability enables the SPD to discharge lightning impulse currents characterised by a 10/350 µs waveform, while Type 2 performance limits surge currents characterised by an 8/20 µs waveform, helping protect downstream electrical and electronic equipment.
The ABB OVR T1-T2 QuickSafe range is designed for coordinated protection of low-voltage installations. The OVR T1-T2 4L 12.5-440s P QS combines four-pole protection, high discharge capability, reserve-varistor technology and pluggable construction, making it suitable for demanding 400 / 690 V AC IT and TN-S electrical distribution systems.
Typical Applications
- Main three-phase low-voltage electrical distribution boards.
- 400 / 690 V AC IT and TN-S electrical systems.
- Industrial electrical installations.
- Commercial buildings and facilities.
- Installations requiring combined lightning current and surge protection.
- Machine and automation electrical distribution panels.
- Building services and infrastructure installations.
- Protection of sensitive electrical and electronic equipment.
