OVR T2 4L 40-275 P QS surge arrester 2CTB803873R5600

### Surge protection in electrical installations

The OVR T2 4L 40-275 P QS surge arrester is a key element in protecting electrical installations from the effects of lightning strikes and switching surges. The device is designed for installation in sub-distribution boards and final circuits, providing protection for sensitive electronic equipment. The type 2 (T2) technology guarantees a quick and effective response to sudden voltage increases, minimizing the risk of damage.

Construction and application

This arrester, manufactured by the renowned company ABB (catalog number 2CTB803873R5600), is characterized by its compact dimensions – it occupies 4 modules – which facilitates its installation even in limited spaces. It is designed to operate in networks with a rated voltage of 230 V, and its construction allows the connection of conductors with a cross-section of up to 16 mm² (flexible) or 25 mm² (single- and multi-strand). The use of the arrester in the installation ensures not only the protection of devices but also increases the safety of the entire electrical network.

Key features and benefits

• High protection efficiency: Maximum discharge current of 20 kA and short-circuit strength of 100 kA guarantee effective protection against damage caused by surges.

• Wide range of applications: Compatibility with TN-S, TN-C-S and TN systems allows the arrester to be used in various electrical installations.

• Optical indication of operation: The built-in optical indicator informs about the operation of the device, facilitating the diagnosis of any problems.

• Safety and reliability: Compliance with safety standards and high quality of workmanship ensure long-lasting and trouble-free operation of the device.

• Easy installation: Compact dimensions and a universal mounting method facilitate the installation of the arrester in various conditions.

• Overload protection: The arrester protects the circuit against overload and short-circuit — as with most circuit breakers in this class.

• Protection level: Provides a protection level of up to 1.1 kV for L-N and 1.25 kV for N-PE, which is important for protecting sensitive electronic devices.

• Rated current: Adapted to work with a maximum overcurrent protection of 125 A (both in series and parallel).

Thanks to these features, the OVR T2 4L 40-275 P QS surge arrester is a reliable solution for professionals and end-users looking for comprehensive protection of their electrical installations.