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2CTB812511R2300 ABB OVR T1-T2 1N 50-255 P TS Surge Protective Device
ABB OVR T1-T2 1N 50-255 P TS combined Type 1 and Type 2 pluggable surge protective device for 230 V AC TT and TN-S single-phase plus neutral systems, with 25 kA L-N impulse current, 50 kA N-PE lightning-current capability and remote signalling.
£673.85
Why Choose the ABB OVR T1-T2 1N 50-255 P TS Surge Protective Device?
The ABB OVR T1-T2 1N 50-255 P TS is a combined Type 1 + Type 2 surge protective device (SPD) designed to protect single-phase plus neutral low-voltage electrical installations against lightning currents and transient overvoltages. Identified by ABB order code 2CTB812511R2300, it provides 1P+N protection for 230 V AC TT and TN-S networks.
The device uses a 1+1 protection configuration, combining a 25 kA L-N protection path with a high-capacity 50 kA N-PE protection path. Its spark-gap technology is designed for installation where substantial lightning-current capability is required, while the low voltage protection level helps reduce electrical stress on downstream equipment.
The OVR T1-T2 1N 50-255 P TS provides an impulse discharge current (Iimp) of 25 kA L-N and 50 kA N-PE using a 10/350 µs waveform, with a 50 kA total lightning-current capability. Its pluggable construction, visual status indication and integrated TS remote signalling contact provide convenient maintenance and condition monitoring for demanding building, commercial and industrial installations.
Key Advantages
- Combined Type 1 + Type 2 protection against lightning currents and transient overvoltages.
- Designed for 230 V AC single-phase plus neutral TT and TN-S systems.
- 25 kA L-N impulse discharge current (Iimp) using a 10/350 µs waveform.
- 50 kA N-PE impulse discharge current and 50 kA total lightning-current capability.
- 25 kA nominal discharge current (In) for Type 2 surge protection.
- 1.5 kV voltage protection level across the L-N and N-PE protection paths.
- Pluggable protection cartridges simplify maintenance and replacement.
- TS remote signalling enables external monitoring of SPD condition.
Key Features
- ABB OVR T1-T2 surge protection range.
- Type 1 / Class I + Type 2 / Class II SPD.
- 1P+N / 1+1 protection configuration.
- 230 V AC nominal voltage, 50/60 Hz.
- 264 V AC L-N maximum continuous operating voltage (Uc).
- 255 V AC N-PE maximum continuous operating voltage.
- 25 kA L-N impulse discharge current (Iimp, 10/350 µs).
- 50 kA N-PE impulse discharge current (Iimp, 10/350 µs).
- 50 kA total discharge current (Itotal, 10/350 µs).
- 25 kA nominal discharge current (In, 8/20 µs).
- 1.5 kV L-N and N-PE voltage protection level (Up).
- Spark-gap surge protection technology.
- Visual status indication plus 1NO + 1NC remote signalling contact.
- Pluggable modular construction for DIN rail mounting.
Reliable Type 1 and Type 2 Protection for Single-Phase Systems
Combined Type 1 and Type 2 surge protective devices provide coordinated protection against both high-energy lightning currents and transient overvoltages. Type 1 capability is evaluated using the 10/350 µs lightning-current waveform, while Type 2 performance addresses 8/20 µs surge currents that can arise from indirect lightning effects and electrical switching operations.
The ABB OVR T1-T2 1N 50-255 P TS combines a 25 kA L-N lightning impulse rating with a 50 kA N-PE discharge path in a compact 1P+N assembly. Replaceable protection cartridges simplify servicing, while local status indication and the TS changeover contact allow protection condition to be checked locally or incorporated into a remote monitoring system.
Typical Applications
- 230 V AC single-phase electrical installations.
- TT and TN-S low-voltage distribution systems.
- Main low-voltage distribution boards.
- Commercial and industrial electrical panels.
- Building electrical distribution systems.
- Installations requiring combined Type 1 and Type 2 lightning and surge protection.
- Systems requiring remote monitoring of surge protective device status.
Technical Specifications
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| Remote Signal | Yes | |
|---|---|---|
| Device Type | Surge protection device | |
| SPD Type | Type 1+2 | |
| Poles | 1-pole + N | |
| Earthing System | TN-S, TT | |
| Impulse Current Iimp (kA) | 25 kA | |
| Series | OVR T1-T2 | |
| ABB order code | 2CTB812511R2300 | |
| Product group | Surge Protection Devices | |
| Product type | Combined lightning-current and surge protective device | |
| SPD classification | Type 1 + Type 2 / Class I + Class II | |
| Technology | Spark gap | |
| Protection configuration | 1+1 / 1P+N | |
| Number of poles | 2 | |
| Number of protected poles | 2 | |
| Low-voltage distribution systems | TT / TN-S | |
| Nominal voltage | 230 V AC | |
| Frequency | 50/60 Hz | |
| Maximum continuous operating voltage (L-N) | 264 V AC | |
| Maximum continuous operating voltage (N-PE) | 255 V AC | |
| Impulse discharge current (Iimp, L-N, 10/350 µs) | 25 kA | |
| Impulse discharge current (Iimp, N-PE, 10/350 µs) | 50 kA | |
| Total discharge current (Itotal, 10/350 µs) | 50 kA | |
| Nominal discharge current (In, 8/20 µs) | 25 kA | |
| Voltage protection level (Up, L-N) | ≤1.5 kV | |
| Voltage protection level (Up, N-PE) | ≤1.5 kV | |
| Short-circuit withstand | 100 kA | |
| Maximum series backup fuse | 125 A gG | |
| Maximum parallel backup fuse | 315 A gG | |
| Remote signalling | Yes | |
| Auxiliary contacts | 1NO + 1NC | |
| Remote contact rating | 250 V AC / 0.5 A | |
| Status indicator | Yes | |
| Protection rating | IP20 | |
| Operating temperature | -40 to +80 °C | |
| Maximum operating altitude | 2000 m | |
| Mounting | 35 mm DIN rail | |
| Construction | Pluggable | |
| Standards | IEC 61643-11 / EN 61643-11 / UL 1449 5th Edition | |
| Dimensions (H × W × D) | 90 × 72 × 73 mm | |
| L-N replacement cartridge | OVR T1-T2 1L 25-255 C | |
| N-PE replacement cartridge | OVR T1-T2 N 50-255 C |
Frequently Asked Questions
What is the ABB OVR T1-T2 1N 50-255 P TS used for?
It is a combined Type 1 and Type 2 surge protective device designed to protect 230 V AC single-phase plus neutral TT and TN-S installations against lightning currents and transient overvoltages.
What is the lightning impulse current rating?
The device provides an impulse discharge current (Iimp) of 25 kA on the L-N path and 50 kA on the N-PE path using a 10/350 µs waveform, with a total lightning-current discharge capability of 50 kA.
What is the voltage protection level?
The OVR T1-T2 1N 50-255 P TS provides a voltage protection level (Up) of ≤1.5 kV across L-N and N-PE, helping limit transient voltage reaching downstream equipment.
What does TS mean on the OVR T1-T2 1N 50-255 P TS?
The TS designation indicates remote signalling. The SPD incorporates a 1NO + 1NC auxiliary contact so its operating condition can be monitored remotely.
Can the protection cartridges be replaced?
Yes. The device uses pluggable protection cartridges. The L-N protection module is the OVR T1-T2 1L 25-255 C and the N-PE protection module is the OVR T1-T2 N 50-255 C.
Trusted Lightning and Surge Protection from ABB
ABB OVR combined Type 1 and Type 2 surge protective devices provide high-capacity lightning-current and transient overvoltage protection for low-voltage electrical installations, with replaceable modules and remote status signalling to support dependable system protection.
