Why Choose the ABB OVR T2 1N 40-275s P QS Surge Protective Device?
The ABB OVR T2 1N 40-275s P QS, order code 2CTB815704R1400, is a Type 2 surge protective device (SPD) designed for single-phase plus neutral 230 V AC TN-S and TT electrical systems. It protects low-voltage installations and sensitive electrical equipment against transient overvoltages caused by indirect lightning effects and switching events.
The OVR T2 1N 40-275s P QS provides a nominal discharge current In of 20 kA and a maximum discharge current Imax of 40 kA using the 8/20 µs waveform. It has a maximum continuous operating voltage Uc of 275 V AC, an impulse-current capability Iimp of 2 kA using the 10/350 µs waveform and a voltage protection level Up of 1.4 kV.
Its 1+1 configuration combines phase and neutral protection in a compact two-module assembly. ABB's Safety Reserve function provides preventive-maintenance capability by retaining basic protection through a reserve varistor when the primary protection stage reaches end of life, while QuickSafe technology, pluggable cartridges and visual status indication simplify inspection and servicing.
Key Advantages
- Reliable Type 2 / Class II surge protection for single-phase plus neutral installations.
- Designed for 230 V AC TN-S and TT systems.
- 40 kA maximum discharge current using the 8/20 µs waveform.
- 20 kA nominal discharge current for effective transient surge suppression.
- 1.4 kV voltage protection level helps limit transient stress on downstream equipment.
- Safety Reserve technology provides continued basic protection after the primary protection stage reaches end of life.
- ABB QuickSafe technology supports safe and reliable end-of-life disconnection.
- Pluggable phase and neutral cartridges simplify maintenance.
- 100 kA short-circuit withstand capability supports demanding installations.
- Compact 35.6 mm two-module width conserves distribution-board space.
Key Features
- ABB OVR T2 QuickSafe series.
- Type 2 / Class II surge protective device.
- 1+1 protected-line configuration.
- Suitable for TN-S and TT low-voltage networks.
- 230 V AC nominal voltage.
- 230/400 V AC nominal system voltage.
- 275 V AC maximum continuous operating voltage Uc.
- 2 kA impulse current Iimp using a 10/350 µs waveform.
- 20 kA nominal discharge current In.
- 40 kA maximum discharge current Imax.
- 1.4 kV voltage protection level Up.
- Safety Reserve preventive-maintenance function.
- Pluggable protection cartridges with visual status indication.
- IP20 degree of protection.
Safety Reserve Surge Protection for Single-Phase TN-S and TT Systems
Type 2 surge protective devices are designed to discharge transient currents associated with indirect lightning effects and switching operations before damaging overvoltages reach connected equipment. The ABB OVR T2 1N 40-275s P QS combines a 20 kA nominal discharge current, 40 kA maximum discharge current and 1.4 kV protection level in a compact 1+1 configuration for single-phase plus neutral installations.
The Safety Reserve design provides an important preventive-maintenance benefit. When the primary varistor reaches the end of its service life, a smaller reserve varistor maintains basic surge protection until replacement can be carried out. Visual status indication and individually pluggable phase and neutral cartridges make it easier to identify and replace the affected protection element without replacing the complete SPD assembly.
Typical Applications
- Single-phase 230 V AC TN-S electrical installations.
- Single-phase 230 V AC TT electrical installations.
- Residential consumer units and distribution boards.
- Commercial building distribution panels.
- Industrial sub-distribution boards.
- Protection of sensitive electronic equipment.
- Building automation, control and communication equipment.
- Installations requiring preventive SPD maintenance indication.
- Coordinated ABB OVR surge protection systems.
