Dehn Surge Arrester DG M TT ACI 275 FM 275V Maximum Voltage DIN Rail Mount Germany

Dehn DG M TT ACI 275 FM Surge Arrester is a modular surge protection device engineered for use with TT and TN-S systems, offering maximum voltage protection rated at 275V. It is specifically designed for DIN Rail mounting, facilitating easy installation and integration into electrical systems.

The arrester incorporates Advanced Circuit Interruption (ACI) technology, combining a switch and spark gap within the protection module. This innovation eliminates the need for any external backup fuses, simplifying system design and maintenance.

With the ability to handle small connection cross-sections up to 6 mm² and transient overvoltages (TOV) at 440 V AC, the device ensures high system reliability without tripping conventional 32 A gG fuses. This feature minimizes downtime and enhances operational stability in industrial and commercial electrical installations.

The galvanic isolation provided by the ACI switch unit guarantees zero leakage current, thus protecting sensitive equipment and reducing energy loss. Additionally, this arrester offers energy coordination compatibility with other devices in the Red/Line product family, enabling scalable and coordinated surge protection solutions.

Designed to operate efficiently within harsh environments, it withstands a minimum temperature of -40°C and a maximum of 80°C, making it suitable for a wide range of industrial, manufacturing, water treatment, HVAC, and construction applications.

The compact size (72mm length, 90mm height, and 77mm depth) saves space in electrical panels, and the unit conforms to EN 61643-11 and IEC 61643-11 standards with KEMA certification, ensuring compliance with international quality and safety standards.

Advanced Circuit Interruption (ACI) technology integrated in the protection module. No external backup fuse required due to ACI switch and spark gap combination. Small connection cross-sections (6 mm²) are sufficient for reliable operation.

TOV withstand rating up to 440 V AC to protect against transient overvoltages. Zero leakage current provided by galvanic isolation of the ACI switch unit. Energy coordination with other Red/Line family arresters. Temperature operation range from -40°C to 80°C for harsh conditions.

Compact and space-saving design with dimensions 72mm x 90mm x 77mm. Compliant with EN 61643-11 and IEC 61643-11 standards with KEMA approval. Manufactured in Germany with high-quality standards.

This Dehn surge arrester is ideal for use in industrial electrical power systems, HV and LV installations, water treatment plants, manufacturing machinery, and other applications requiring robust surge protection. It ensures equipment safety by mitigating damage from electrical surges, thereby extending equipment life and minimizing costly downtime.

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