The surge arresters OPN-M are designed to protect internal distribution circuits of residential and public buildings from lightning and switching surges.

The arresters are intended for operation in single-phase or three-phase alternating current electrical networks with a voltage of up to 400 V and a frequency of 50 Hz. The arresters perform the functions of surge limitation and diversion of impulse currents.

The main application areas of the arresters:

• incoming-distribution devices
• accounting-distribution boards of residential and public buildings
• group apartment and floor-mounted panels

Modification options:

• OPN-M (3S) 10kA – Surge arrester 3 modules 380V; In: 10kA
• OPN-M (3S) 20kA – Surge arrester 3 modules 380V; In: 20kA
• OPN-M (3S) 30kA – Surge arrester 3 modules 380V; In: 30kA

They consist of a base and replaceable modules with a signal indicator:

• green: normal operating condition
• orange: cartridge replacement needed