Parafoudre ESPAC V T12 12,5/275 2+0 10200120080

Protection against surges for TN networks

This Type 1+Type 2 bipole surge arrester is designed for the main switchboards of residential, office, and industrial buildings - it protects the electrical installation from the effects of direct and indirect lightning strikes as well as switching surges. Mounted at the boundary of LPZ 0 and LPZ 1 zones, it acts as the first barrier against lightning energy before it enters further into the installation.

The varistor-based design ensures a fast response time of 25 ns. A rated discharge current of 30 kA (8/20 µs) and a peak current of 60 kA guarantee a high capacity for absorbing impulse energy. The voltage protection level of 1,5 kV effectively reduces surges to safe values for connected devices.

The housing occupies two modules on the TH35 rail - the modular width allows for compact installation in standard switchboards. The replaceable module is equipped with an optical indicator signaling the operating status: a green window indicates device functionality, while red indicates the need to replace the module. The built-in thermal protection disconnects the arrester from the network if the permissible temperature is exceeded or if the current flow exceeds Imax.

Electrical parameters

The device is intended for TN-S, TN-C, and TN-C-S network systems - i.e., typical installations powered from distribution transformers. It is not intended for TT or IT systems.

The continuous operating voltage is 275 V AC, which corresponds to a single-phase network taking into account typical operational deviations. The surtension temporaire (TOV) for L-N conditions is maintained at 335 V for a period of 5 seconds - the device tolerates such temporary voltage increases without damage.

The connection terminals accept single-core wires from 1 mm² to max. 35 mm² and stranded cables from 1 mm² to max. 25 mm². Both flexible wires and busbars - fork or pin type - can be connected to the power terminals. The short-circuit protection is 160 A gL/gG, and the short-circuit strength reaches 50 kA.

Operating conditions

Operation is possible in temperatures ranging from −40°C to +80°C, with a relative ambient humidity between 5% and max. 95%. The housing protection rating is IP20 - indoor installation only, the product is not intended for outdoor applications.

The width of two modules allows for flexible placement of the device on the TH35 rail in two mounting positions - the installer can adapt the orientation of the device to the current switchboard configuration.

Standards and application

The arrester complies with the requirements of PN-EN 61643-11 and IEC 61643-11 standards - confirming its compliance with European and international standards for low-voltage surge protective devices.

It is intended for buildings equipped with an LPS lightning protection system of class LPL III and IV - this typically includes single-family houses, multi-family residential buildings, and administrative or public utility facilities not subject to specific protection requirements.