This Tracon ESPD1+2-50-3P type device is a professional combined surge arrester specially designed for the protection of three-phase electrical networks.

Combined protection (T1+T2): Combines coarse (lightning current) and medium protection levels in a single device. It is capable of discharging high-energy impulses caused by direct or nearby lightning strikes, as well as protecting equipment from overvoltages resulting from network switching.

Area of ​​application: It is recommended to be installed primarily in main distribution cabinets, at the point after the consumption meter, in buildings that have a lightning arrester or have an open wire supply.

Modular construction: 3-pole design that can be snapped onto a standard DIN rail. Despite its compact size, it has an extremely high maximum discharge current of up to 160 kA.

Safety indicator: The optical indicator window on the front panel shows the status of the device. If the indicator changes from green to red, the device has worn out (absorbed the surge) and needs to be replaced.

Technical data:
- Nominal operating voltage: 385V AC (50 Hz)
- Protection level (\(U_{p}\)): < 2.5 kV (limit the voltage peak to this)
- Impulse current (\(I_{imp}\)): 50 kA (10/350 µs waveform)
- Temperature range: operational between -40 °C and +85 °C.
- Protection: IP20 (for indoor use).

Important: In all cases, the installation must be carried out by a qualified electrician, taking into account the regulations of the local electricity supplier and the use of an earthing wire with the appropriate cross-section.