Why Choose the ABB OVR T2 3N 40-275s P QS Surge Protection Device?
The ABB OVR T2 3N 40-275s P QS, order code 2CTB815704R2000, is a pluggable Type 2 surge protection device (SPD) designed to protect three-phase plus neutral low-voltage electrical installations against transient overvoltages caused by indirect lightning and switching events. Part of the ABB OVR QuickSafe range, its 3N configuration provides common- and differential-mode protection for compatible TT and TN-S distribution systems.
The OVR T2 3N 40-275s P QS provides a 20 kA nominal discharge current (In) and 40 kA maximum discharge current (Imax) with an 8/20 µs waveform. It has a maximum continuous operating voltage (Uc) of 275 V AC and an overall voltage protection level (Up) of 1.4 kV, with protection levels of 1.35 kV L-N and 1.3 kV N-PE.
The “s” Safety Reserve design incorporates reserve-varistor functionality so that basic surge protection can remain available when the primary protection stage reaches the end of its service life. Visual status indication and preventive-maintenance functionality support condition monitoring, while the four-pole pluggable construction simplifies servicing within distribution boards.
Key Advantages
- Type 2 surge protection for three-phase plus neutral low-voltage installations.
- 40 kA maximum discharge current (Imax) with an 8/20 µs waveform.
- 20 kA nominal discharge current (In) with an 8/20 µs waveform.
- Overall 1.4 kV voltage protection level (Up).
- 1.35 kV L-N and 1.3 kV N-PE voltage protection levels.
- 275 V AC maximum continuous operating voltage.
- Safety Reserve technology provides an additional protection stage for improved continuity of surge protection.
- Visual status indication and preventive-maintenance functionality support planned servicing.
- Pluggable QuickSafe construction enables straightforward replacement of protection cartridges.
Key Features
- ABB OVR QuickSafe surge protection range.
- Type 2 / Class II surge protection device.
- 3N configuration for three-phase plus neutral installations.
- Four poles.
- Suitable for compatible TT and TN-S distribution systems.
- 275 V AC maximum continuous operating voltage.
- 20 kA nominal discharge current (8/20 µs).
- 40 kA maximum discharge current (8/20 µs).
- 2 kA impulse current (10/350 µs).
- 1.4 kV overall voltage protection level.
- Safety Reserve technology.
- Preventive-maintenance function.
- Integrated visual status indication.
- 100 kA rated service short-circuit breaking capacity.
- DIN rail mounting.
- Four-module construction.
- IP20 protection rating.
- Pluggable construction for convenient maintenance.
Three-Phase Type 2 Protection with Safety Reserve Technology
Type 2 surge protection devices are designed to limit transient overvoltages associated with indirect lightning and switching events in low-voltage electrical networks. ABB's 3N configuration provides protection for three-phase plus neutral systems and is intended for installations where both common-mode and differential-mode transient protection is required, including compatible TT and TN-S networks.
The ABB OVR T2 3N 40-275s P QS combines a 40 kA maximum 8/20 µs discharge current with Safety Reserve technology. Rather than completely removing surge protection when the primary protection stage reaches end of life, the reserve-varistor concept maintains a basic level of protection until replacement can be carried out, while the visual status and preventive-maintenance functions help indicate when attention is required.
Typical Applications
- Three-phase plus neutral low-voltage electrical installations.
- TT electrical distribution systems.
- TN-S electrical distribution systems.
- Main electrical distribution boards.
- Subdistribution boards.
- Commercial building electrical systems.
- Industrial low-voltage distribution installations.
- Residential and multi-residential electrical distribution systems.
- Protection of sensitive electrical and electronic equipment.
- Protection against indirect lightning and switching-induced transient overvoltages.
