Why Choose the ABB OVR T2-T3 3N 20-440 P QS Surge Protective Device?
The ABB OVR T2-T3 3N 20-440 P QS is a combined Type 2 and Type 3 surge protective device (SPD) designed to protect three-phase plus neutral low-voltage electrical installations against transient overvoltages caused by indirect lightning effects and switching events. Identified by ABB order code 2CTB803973R1300, it is designed for 400/690 V AC TT and TN-S networks where dependable protection of sensitive electrical and electronic equipment is required.
As part of the ABB OVR QuickSafe surge protection range, the device combines Type 2 surge-current discharge capability with the low residual voltage characteristics associated with Type 3 protection. Its 3+1 protection configuration, pluggable construction and visual status indication make it suitable for intermediate distribution boards and installations close to sensitive terminal equipment.
The OVR T2-T3 3N 20-440 P QS has a 440 V AC maximum continuous operating voltage (Uc), a 5 kA nominal discharge current (In) and a 20 kA maximum discharge current (Imax) using an 8/20 µs waveform. With a voltage protection level of 1.5 kV, it provides effective transient protection for higher-voltage three-phase distribution systems.
Key Advantages
- Combined Type 2 + Type 3 surge protection for sensitive downstream equipment.
- Designed for 400/690 V AC three-phase plus neutral systems.
- 20 kA maximum discharge current (Imax) using an 8/20 µs waveform.
- 5 kA nominal discharge current (In) for effective transient surge protection.
- 440 V AC maximum continuous operating voltage for higher-voltage installations.
- 3+1 protection configuration suitable for TT and TN-S networks.
- Pluggable protection modules simplify maintenance and replacement.
- Visual status indication assists with routine inspection of the protection device.
Key Features
- ABB OVR T2-T3 QuickSafe surge protection series.
- Type 2 + Type 3 surge protective device.
- 3+1 / three-phase plus neutral configuration.
- 400/690 V AC nominal system voltage.
- 440 V AC maximum continuous operating voltage (Uc).
- 5 kA nominal discharge current (In, 8/20 µs).
- 20 kA maximum discharge current (Imax, 8/20 µs).
- 1.5 kV voltage protection level (Up).
- 2 kA impulse discharge current (Iimp, 10/350 µs).
- Integrated visual status indicator.
- Pluggable QuickSafe construction for convenient servicing.
- DIN rail mounting for modular distribution boards.
Reliable Type 2 and Type 3 Protection for Sensitive Equipment
Combined Type 2 and Type 3 surge protective devices provide coordinated protection against transient overvoltages. Their Type 2 characteristics enable them to discharge surge currents generated by indirect lightning events using an 8/20 µs waveform, while their Type 3 characteristics provide a low residual voltage suitable for protecting sensitive electronic equipment.
The ABB OVR T2-T3 3N 20-440 P QS is particularly suited to intermediate and sub-distribution boards or installation close to sensitive loads. Its pluggable QuickSafe design simplifies replacement, while the 3+1 configuration provides coordinated phase-to-neutral and neutral-to-earth surge protection for TT and TN-S three-phase systems.
Typical Applications
- 400/690 V AC three-phase electrical distribution systems.
- TT and TN-S low-voltage electrical networks.
- Industrial control and automation panels.
- Intermediate and sub-distribution boards.
- Protection of PLCs, controllers and sensitive electronic equipment.
- Industrial machinery and process-control systems.
- Commercial and industrial electrical installations.
