Surge protection device T2 (B) - DC - leakage current free ETITEC SM T2 DC 1000/20 Y RC 002440729

Protection of photovoltaic and DC installations – surge arrester ETITEC SM T2 DC 1000/20 Y RC

This surge arrester class T2 (B) is designed to protect direct current (DC) installations, such as photovoltaic systems, from the effects of atmospheric and switching surges. Its leakage current-free design minimizes the risk of unwanted currents in the circuit, which is particularly important in DC applications. It provides effective protection of voltage-sensitive components, such as inverters and solar panels.

Construction and application

The ETITEC SM T2 DC 1000/20 Y RC surge arrester is mounted on a standard DIN TH-35 mm mounting rail and occupies 3 modules. Optical indication of operation facilitates quick identification of the need to replace the device after a surge. It is designed for DC systems with a voltage of up to 1000V, and its effectiveness is confirmed by its ability to discharge pulses with a peak value of 20kA (8/20μs) and short-circuit resistance at 30kA. The maximum cross-section of the cables that can be connected is 35mm² for single- and multi-core cables and 25mm² for flexible cables.

Key features and benefits

• Overvoltage protection: Protects the DC installation from damage caused by sudden voltage increases.
• Leakage current-free: Eliminates the risk of unwanted currents in the DC circuit, increasing system safety and reliability.
• Optical indication: Enables quick visual identification of the device status – whether it has operated and needs to be replaced.
• DIN rail mounting: Facilitates integration with existing electrical infrastructure.
• High energy discharge capacity: Rated discharge current of 20kA and maximum discharge current of 65kA provide effective protection even in the event of strong surges.
• N-PE protection level: Provides additional protection by limiting the voltage to 2.5kV between the neutral (N) and protective (PE) conductors.
• Compatibility with DC systems: Designed for operation in DC circuits only, ensuring optimal protection for photovoltaic installations and other DC devices.
• Compact dimensions: Occupies only 3 modules on the DIN rail, saving space in the switchgear cabinet.