Surge protective device for high-voltage applications, T1+T2, Iimp: 4kA (10/350), 690V AC, Imax: 100 kA, Uc: 750V AC RSP-EH12.5/100-750-10 2617377

Professional Surge Protection for High-Voltage Installations

The RSP-EH12.5/100-750-10 surge arrester is an advanced Class I+II (T1+T2) solution specifically designed for power systems with a rated voltage of 690 V AC. Thanks to its dual functionality, it protects installations against both direct lightning strikes (Class T1) and indirect effects of atmospheric discharges as well as network surges (Class T2).

Operating Parameters and Performance

The device features a peak current Iimp of 4 kA with a 10/350 μs wave shape, making it suitable for protecting circuits exposed to intense atmospheric discharges. The maximum discharge current Imax reaches 100 kA, ensuring effective operation even under extreme overload conditions. The rated discharge current of 25 kA guarantees stable performance during normal network surges.

The continuous operating voltage Uc of 750 V AC allows safe operation in high-voltage systems, while the plug-in construction enables quick installation and replacement of the device. The single-pole VT technology was specifically developed for single-phase networks, simplifying installation in typical power supply configurations for industrial and commercial buildings.

Construction and Functionality

With a module width of 36 mm per pole, the device allows for economical use of space within electrical distribution boards. The surge arrester is equipped with potential-free contacts for remote fault signaling, enabling continuous monitoring of the device status by building automation systems or alarm control panels.

This solution is particularly valuable in industrial installations, where rapid detection of surge arrester failure can prevent costly production downtime and potential damage to expensive electronic equipment.

Applications and Operational Benefits

The product is suitable for a wide range of high-voltage installations—from main distribution boards in commercial buildings and power supply systems for production halls, to technological infrastructures requiring the highest level of power supply reliability. The dual protection class eliminates the need for two separate devices, reducing investment costs and simplifying the design of lightning protection systems.

Thanks to its high current parameters, the device also serves effectively as a final pre-conductor protection element in distribution systems supplying loads particularly sensitive to power supply voltage disturbances.