Why Choose the ABB OVR T1-T2 N 100-255 TT C Surge Protection Device?
The ABB OVR T1-T2 N 100-255 TT C, order code 2CTB812022R2300, is a high-capacity Type 1+2 surge protection device (SPD) cartridge designed for neutral-to-earth protection in low-voltage electrical installations. As part of the ABB OVR surge protection range, it combines lightning-current and surge protection capabilities to help protect electrical systems against transient overvoltages and high-energy surge events.
Designed for TT and TN-S low-voltage distribution systems, this single-pole neutral protection module provides a 100 kA impulse current (Iimp) with a 10/350 µs waveform, a 60 kA maximum discharge current (Imax) with an 8/20 µs waveform and a 25 kA nominal discharge current (In). Its high discharge capability makes it suitable for coordinated surge protection systems where substantial lightning-current handling is required.
The OVR T1-T2 N 100-255 TT C is designed for systems with a nominal AC voltage of 240–400 V AC and has a maximum continuous operating voltage (Uc) of 255 V AC between N-PE. With a 1.5 kV voltage protection level, 100 kA short-circuit withstand capability and compact DIN rail-compatible cartridge format, it provides robust protection for demanding electrical distribution applications.
Key Advantages
- Combined Type 1+2 surge and lightning-current protection for low-voltage electrical installations.
- 100 kA impulse current (Iimp) with a 10/350 µs waveform for high-energy surge events.
- 60 kA maximum discharge current (Imax) with an 8/20 µs waveform.
- 25 kA nominal discharge current (In) for dependable surge protection performance.
- 1.5 kV voltage protection level helps limit transient overvoltages reaching downstream equipment.
- 255 V AC maximum continuous operating voltage between neutral and protective earth.
- 100 kA short-circuit withstand capability for robust low-voltage installations.
- Designed for neutral protection in TT and TN-S distribution systems.
Key Features
- ABB OVR T1-T2 surge protection range.
- Type 1+2 combined surge protection device cartridge.
- Single-pole neutral-to-earth protection configuration.
- 100 kA impulse current (10/350 µs).
- 60 kA maximum discharge current (8/20 µs).
- 25 kA nominal discharge current (8/20 µs).
- 255 V AC maximum continuous operating voltage (N-PE).
- 1.5 kV voltage protection level.
- 100 kA rated service short-circuit breaking capacity.
- 100 kA short-circuit withstand.
- Suitable for TT and TN-S networks.
- Designed for DIN rail-mounted surge protection assemblies.
- Compliant with IEC 61643-11, EN 61643-11 and UL 1449 5th Edition.
High-Capacity Lightning and Surge Protection
Type 1+2 surge protection devices combine protection against high-energy lightning currents with protection against transient overvoltages generated by indirect lightning and electrical switching events. This combined capability enables coordinated protection at the electrical distribution level while helping limit potentially damaging transient voltages reaching downstream equipment.
The ABB OVR T1-T2 N 100-255 TT C is specifically designed as a neutral-to-earth protection element for compatible TT and TN-S systems. Its 100 kA 10/350 µs impulse-current capability, high short-circuit withstand and compact cartridge construction make it suitable for demanding surge protection installations where substantial neutral discharge capacity is required.
Typical Applications
- TT and TN-S low-voltage electrical distribution systems.
- Neutral-to-earth protection in coordinated SPD installations.
- Main electrical distribution boards.
- Commercial building electrical systems.
- Industrial electrical distribution installations.
- Facilities requiring high-capacity lightning-current protection.
- Protection against direct and indirect lightning-related surge currents.
- Protection against transient overvoltages caused by electrical switching events.
