Prepäťová ochrana ABB OVR T2 4L 40-275 P QS (Typ 2, 4-polová, 40–275 V)

ABB OVR T2 4L 40-275 P QS is a Type 2 surge arrester engineered for four-pole protection in low-voltage electrical installations with an operating range of 40–275 V. The device is intended to limit transient overvoltages and to divert lightning-induced surges away from connected equipment. Compact and designed for mounting in distribution boards and final circuits, this unit supports improved system reliability and helps reduce equipment downtime.

Advantages

The surge arrester provides coordinated protection for all four conductors in TN and TT systems within the specified voltage range. It features rapid response to transient events, reliable surge diversion characteristics and compatibility with standard DIN-rail mounting systems. The product design supports predictable protection behavior and reduces the risk of damage to sensitive electronics and electrical devices in residential, commercial and light industrial installations.

Suitable for

Key specifications

How to use

Install the ABB OVR T2 4L on a DIN rail inside the distribution board according to local wiring regulations and the manufacturer’s installation instructions. Connect the four poles to the corresponding conductors so that all live and neutral lines are protected. Ensure proper earthing of the system and verify that upstream and downstream protection devices are coordinated for correct operation. After installation, check connection integrity and perform power-up tests to confirm normal operation of the protected circuits.

Recommendations

Use this surge arrester as part of a layered protection strategy: combine with upstream Type 1 devices where direct lightning exposure is likely and downstream Type 3 protection for sensitive end equipment. Regularly inspect visual indicators or status contacts if provided, and replace the unit after severe surge events or if any fault indication is observed.