OVR T1-T2 4L 12.5-275s P QS surge arrester 2CTB815710R2300

Electrical installation protection with surge limiters OVR T1-T2

The OVR T1-T2 4L 12.5-275s P QS surge limiter is a key element in protecting electrical installations from the effects of current surges, both those originating from lightning strikes and those induced in the network. The device, class 1+2 (formerly B+C), effectively protects against overvoltages, minimizing the risk of equipment damage and fires. Installing the limiter at the input to the main distribution board is the basis for comprehensive protection.

This four-pole limiter (4P) is designed to operate in TN-S networks, offering optimal safety in typical building installations. Its compact design – occupying only 4 modules on a TH-35 mm DIN rail – makes installation easy even in crowded distribution boards. The lack of an optical indicator signaling damage means that the device's status should be checked periodically, in accordance with the manufacturer's recommendations.

Characteristics and application

OVR T1-T2 series surge limiters from ABB are designed for use in residential, commercial and industrial facilities. Their task is to protect sensitive electronic devices from the effects of overvoltages, which can lead to their failure or permanent damage. A surge current of 12.5 kA (10/350 µs) and the ability to withstand a voltage of 275 V AC make this limiter suitable for a wide range of applications. The maximum wire cross-section of 35 mm² ensures compatibility with most standard electrical installations.

Using the limiter in a TN-S system is particularly important, as it provides effective protection against overvoltages originating both from the external line and from insulation damage inside the building. Protection class Type 1+2 guarantees high efficiency in the event of both direct lightning strikes and indirect overvoltages induced in the network.

Key features and benefits

• Versatile protection: Protection class Type 1+2 provides protection against lightning strikes and induced overvoltages.

• Compatibility with installations: Designed to operate in TN-S networks, making it an ideal solution for most residential and commercial buildings.

• Convenient installation: Compact design (4 modules) makes installation on a TH-35 mm DIN rail easy.

• High durability: Surge current of 12.5 kA (10/350 µs) provides effective protection even with strong overvoltages.

• Safety: Protects electrical devices from damage caused by overvoltages, minimizing the risk of fire and equipment failure.

• Solid construction: Made of high-quality materials ensuring durability and reliable operation for a long time.

• Maximum wire cross-section: Support for wires with a cross-section of up to 35 mm² provides flexibility when connecting different types of electrical installations.