Surge arrester ABB OVR ZP T1-T2 3N 25 Type 1+2, model 2CTB815799R1500

The ABB OVR ZP T1-T2 3N 25 (model 2CTB815799R1500) is a Type 1+2 surge arrester for three-phase 3N electrical systems. It is designed to protect service entrances and distribution panels by limiting transient overvoltage and diverting surge current to ground, providing coordinated protection where both Type 1 and Type 2 functions are required.

Advantages

This surge arrester combines Type 1 and Type 2 protection in a single device, allowing simplified installation at service entrances and distribution boards. It is suitable for coordinated protection of residential, commercial and light industrial installations and helps reduce the risk of equipment damage from lightning-induced or switching transients. The ABB design follows industry standards for reliable operation and safe diversion of surge currents to earth.

Suitable for

• Service entrance protection for three-phase (3N) systems
• Main and sub-distribution panels
• Residential buildings, commercial properties and light industrial sites
• Environments requiring coordinated Type 1+2 surge protection

Key specifications

• Model: 2CTB815799R1500
• Type: Type 1+2 (combined)
• System: Three-phase 3N
• Nominal discharge current rating: 25 (device designation includes 25) — refer to manufacturer datasheet for detailed electrical values
• Brand: ABB

How to use

Install the ABB OVR ZP T1-T2 3N 25 at the service entrance or distribution board in accordance with national electrical codes and the manufacturer’s installation instructions. Connect line and neutral conductors as specified and ensure a solid, low-impedance earth connection for correct operation. Coordination with upstream fuses or circuit breakers is required to ensure the arrester operates safely during surge events. Commission the device after installation and verify proper earthing and connections before restoring power.

Usage recommendations

Place the surge arrester close to the incoming supply and maintain short conductor runs to earth to minimize let-through voltage. Replace the unit after sustaining a significant surge event if indicated by the manufacturer's end-of-life or fault indicators, and follow ABB's datasheet and local regulations for selection and maintenance.