Surge arrester T2 (C) ETITEC C T2 275/20 3+1 RC 002440404

Surge protection in the installation – reliability and safety

The ETITEC C T2 275/20 3+1 RC surge arrester is a key element in protecting the electrical installation from the effects of sudden voltage increases. The device is designed to protect against surges in TN-S, TT and TN networks, providing comprehensive protection for both devices and the installation. Its construction based on varistor technology guarantees a quick and effective response to disturbances.

Construction and application

This arrester belongs to class T2, which means it is intended for installation at the energy distribution stage, close to the receivers. Application in TT/TN-S systems allows for effective limitation of surges caused by both lightning strikes and disturbances in the power grid. Mounting is done on a standard DIN TH-35 mm mounting rail, which facilitates integration with existing infrastructure. It has 4 module widths, allowing it to be placed in standard distribution boards.

Key features and benefits

• High protection efficiency: Rated discharge current at 20 kA (8/20 µs) and maximum discharge current of 40 kA provide effective protection against damage caused by surges.
• Versatility: Possibility of use in TN-S, TT and TN network systems increases installation flexibility.
• Optical signaling: Built-in optical indicator informs about the operation of the arrester, facilitating diagnostics and maintenance.
• Remote status signaling: The presence of a contact for remote signaling enables integration with monitoring and alarm systems.
• Safety: L-N and N-PE protection level of 1.5 kV minimizes the risk of damage to connected devices.
• Compatibility with wires: Support for wires with a cross-section of up to 35 mm² (solid/stranded) and 25 mm² (flexible) ensures wide compatibility with various types of installations.
• Durability: Short-circuit withstand strength (Isccr) at 25 kA ensures resistance to short-circuit currents occurring in the installation.
• Solid construction: Protection degree IP20 provides basic protection against touch and contamination.

The ETITEC C T2 275/20 3+1 RC surge arrester is an investment in the safety and reliability of the electrical installation, which protects devices from costly failures and downtime. Its versatility and ease of installation make it an ideal choice for both professional installers and end-users who care about the safety of their home or company.