Why Choose the ABB OVR T1-T2 N 100-255 P Surge Protective Device?
The ABB OVR T1-T2 N 100-255 P, order code 2CTB813010R2300, is a high-capacity combined Type 1 and Type 2 neutral-to-earth surge protective device (SPD) designed for TN-S and TT low-voltage networks. Using spark-gap technology, it is intended for installation in main AC distribution switchboards and sub-distribution boards where substantial lightning-current and transient-overvoltage protection is required.
Designed for 230/400 V AC electrical systems, the OVR T1-T2 N 100-255 P provides an exceptional 100 kA impulse-current capability using the 10/350 µs lightning-current waveform. It also provides a nominal discharge current of 100 kA on the N-PE protection path and limits the voltage protection level to 1.5 kV.
The device provides a dedicated neutral-to-earth (N-PE) protection path with a maximum continuous operating voltage of 255 V AC. Its pluggable construction allows the protection module to be replaced when required, while the compact two-module DIN-rail format makes it straightforward to integrate into coordinated lightning and surge protection systems.
Key Advantages
- Combined Type 1 + Type 2 / Class I + II protection in a single device.
- High 100 kA lightning impulse-current capability using a 10/350 µs waveform.
- Dedicated N-PE protection for TN-S and TT electrical networks.
- 100 kA nominal discharge current on the neutral-to-earth protection path.
- Low 1.5 kV voltage protection level helps limit transient stress on downstream equipment.
- 255 V AC maximum continuous operating voltage.
- Spark-gap technology designed for high-energy lightning-current discharge.
- Pluggable construction simplifies maintenance and module replacement.
- Compact 36 mm width occupies only two DIN-rail modules.
Key Features
- ABB OVR T1-T2 series.
- Type 1 + Type 2 / Class I + II SPD.
- Dedicated neutral-to-earth protection.
- Suitable for TN-S and TT systems.
- Single protected N-PE line.
- Spark-gap protection technology.
- 100 kA impulse current Iimp using a 10/350 µs waveform.
- 100 kA nominal discharge current In on the N-PE path.
- 1.5 kV voltage protection level Up.
- 255 V AC maximum continuous operating voltage Uc.
- Response time of less than 100 ns.
- Pluggable protection module construction.
- IP20 degree of protection.
- 35 mm DIN-rail mounting.
High-Capacity Neutral-to-Earth Lightning and Surge Protection
In TN-S and TT electrical systems, the neutral-to-earth protection path plays an important role in a coordinated surge protection arrangement. The ABB OVR T1-T2 N 100-255 P uses spark-gap technology to conduct high-energy lightning currents between neutral and protective earth while maintaining electrical separation during normal operation.
Its exceptional 100 kA 10/350 µs impulse-current capability makes it suitable for demanding lightning protection applications at the origin of an installation. When combined with suitable line protection SPDs, it can form part of a coordinated Type 1 and Type 2 protection system for main switchboards, helping reduce transient stress on downstream distribution equipment and sensitive electronic loads.
Typical Applications
- Main AC distribution switchboards.
- Sub-distribution boards requiring high-capacity surge protection.
- 230/400 V AC TN-S electrical installations.
- 230/400 V AC TT electrical installations.
- Commercial and industrial buildings.
- Manufacturing plants and industrial facilities.
- Installations equipped with external lightning protection systems.
- Coordinated line-to-neutral and neutral-to-earth surge protection assemblies.
