Why Choose the ABB OVR T1-T2 3L 12.5-440s P QS Surge Protective Device?
The ABB OVR T1-T2 3L 12.5-440s P QS is a high-performance combined Type 1 + Type 2 surge protective device (SPD) designed to protect three-phase low-voltage electrical systems against lightning currents and transient overvoltages. Identified by ABB order code 2CTB815710R4700, this three-pole device forms part of the ABB OVR QuickSafe range and is compatible with ABB System pro M compact distribution equipment.
Designed for TN-C and IT distribution systems, the device provides an impulse current rating of 12.5 kA per pole using a 10/350 µs waveform, a 30 kA nominal discharge current and an 80 kA maximum discharge current. Its 440 V AC maximum continuous operating voltage and 400/690 V AC nominal system rating make it particularly suitable for demanding three-phase industrial power networks.
The OVR T1-T2 3L 12.5-440s P QS incorporates ABB's QuickSafe reserve-varistor technology, providing additional protection availability when the primary surge protection stage reaches the end of its service life. Pluggable protection modules simplify maintenance, while visual status indication and preventive-maintenance functionality help operators identify when servicing is required.
Key Advantages
- Combined Type 1 + Type 2 lightning and surge protection in one device.
- Three-pole configuration for three-phase TN-C and IT systems.
- 12.5 kA impulse current (Iimp, 10/350 µs) per pole.
- 37.5 kA total impulse current across the three protected poles.
- 30 kA nominal discharge current (In) for Type 2 surge protection.
- 80 kA maximum discharge current (Imax) for high-energy transient events.
- 440 V AC maximum continuous operating voltage for higher-voltage applications.
- ABB QuickSafe reserve-varistor technology helps maintain basic protection at end of life.
- Pluggable protection modules simplify servicing and replacement.
- Visual status indication and preventive-maintenance functionality support routine inspection.
Key Features
- ABB OVR QuickSafe series.
- Type 1 + Type 2 / Class I + II surge protection.
- Three poles / three protected lines.
- Designed for TN-C and IT low-voltage distribution systems.
- 12.5 kA impulse current (Iimp, 10/350 µs) per pole.
- 37.5 kA total impulse current (10/350 µs).
- 30 kA nominal discharge current (In, 8/20 µs).
- 80 kA maximum discharge current (Imax, 8/20 µs).
- 240 kA total maximum discharge current.
- 400/690 V AC nominal system voltage.
- 440 V AC maximum continuous operating voltage L-PE.
- 2 kV voltage protection level (Up L-PE).
- 100 kA short-circuit withstand capability.
- Mechanical status indication and preventive-maintenance function.
- Pluggable DIN-rail-mounted construction.
Combined Lightning and Surge Protection for TN-C and IT Systems
Combined Type 1 + Type 2 SPDs provide coordinated protection against both high-energy lightning currents and transient surge voltages. The ABB OVR T1-T2 3L 12.5-440s P QS is tested for lightning-current impulses using the 10/350 µs waveform associated with Type 1 protection while also handling transient currents characterised by the 8/20 µs waveform used for Type 2 surge protection.
Its three-pole configuration is designed for TN-C and IT networks, with a nominal system voltage of 400/690 V AC. ABB's reserve-varistor design helps retain a basic level of surge protection when the primary protection stage reaches the end of its service life, while the pluggable construction and visual condition indication simplify ongoing maintenance.
Typical Applications
- Main electrical distribution switchboards.
- Three-phase TN-C electrical distribution systems.
- Three-phase IT electrical distribution systems.
- 400/690 V AC industrial power networks.
- Buildings equipped with external lightning protection systems.
- Industrial manufacturing and process-control facilities.
- Industrial automation and machinery installations.
- Commercial buildings and infrastructure systems.
- Protection of sensitive electrical and electronic equipment.
