Why Choose the ABB OVR T2-T3 1N 20-275 P QS Surge Protective Device?
The ABB OVR T2-T3 1N 20-275 P QS is a compact and reliable combined Type 2 and Type 3 surge protective device (SPD) designed to protect single-phase low-voltage electrical installations and sensitive equipment against transient overvoltages. As part of the ABB OVR QuickSafe surge protection range, it provides coordinated surge protection for applications where a low residual voltage is required close to sensitive electrical and electronic equipment.
Designed for TN-S and TT 230 V AC single-phase plus neutral networks, the OVR T2-T3 1N 20-275 P QS features a 1+1 protection configuration. It provides a maximum discharge current of 20 kA and a nominal discharge current of 5 kA using the 8/20 µs waveform, while its Type 3 capability provides additional protection against voltage surges close to connected equipment.
With a maximum continuous operating voltage of 275 V AC and a voltage protection level of 1.4 kV, this pluggable SPD is well suited to distribution boards, control panels and installations supplying sensitive electronic loads. Its replaceable cartridges, mechanical status indication and compact DIN-rail format simplify installation, inspection and maintenance.
Key Advantages
- Combined Type 2 and Type 3 surge protection in a compact device.
- Designed for 230 V AC TN-S and TT single-phase networks.
- 20 kA maximum discharge current using an 8/20 µs waveform.
- 5 kA nominal discharge current for dependable surge suppression.
- 275 V AC maximum continuous operating voltage.
- Low 1.4 kV voltage protection level helps protect sensitive equipment.
- Pluggable cartridges simplify replacement and maintenance.
- Mechanical status indication allows rapid visual inspection.
- Compact DIN-rail construction occupies only two modular spaces.
Key Features
- ABB OVR T2-T3 QuickSafe series.
- Type 2 + Type 3 surge protective device.
- 1+1 phase and neutral protection configuration.
- Suitable for TN-S and TT networks.
- 20 kA maximum discharge current Imax.
- 5 kA nominal discharge current In.
- 2 kA impulse current Iimp using a 10/350 µs waveform.
- 1.4 kV voltage protection level Up.
- 275 V AC maximum continuous operating voltage Uc.
- Pluggable phase and neutral cartridges for convenient servicing.
- Mechanical operating-status indicators.
- DIN-rail mounting for modular electrical distribution equipment.
Combined Type 2 and Type 3 Surge Protection
Combined Type 2 and Type 3 SPDs provide both distribution-level surge protection and additional fine protection for sensitive downstream equipment. As a Type 2 device, the ABB OVR T2-T3 1N 20-275 P QS safely discharges surge currents characterised by an 8/20 µs waveform and can be coordinated with upstream Type 1 or Type 2 surge protective devices.
Its Type 3 characteristics make the device particularly suitable for installation close to sensitive electrical and electronic equipment. The combination of a low voltage protection level, pluggable cartridges and compact DIN-rail construction provides a practical solution for protecting modern electronic loads in residential, commercial and industrial installations.
Typical Applications
- Single-phase 230 V distribution boards.
- TN-S and TT low-voltage electrical systems.
- Residential and commercial electrical installations.
- Industrial control and automation panels.
- Protection of sensitive electronic equipment.
- Building automation and control systems.
- Sub-distribution boards located close to sensitive loads.
