This part of IEC 61643 describes the principles for the selection, operation, location and coordination of SPDs connected to telecommunication and signalling networks with nominal system voltages up to 1 000 V r.m.s. a.c. and 1 500 V d.c.
This standard also addresses SPDs that incorporate protection for signalling lines and power lines in the same enclosure (so called multiservice SPDs).dition 2.0 2015-06 INTERNATIONAL STANDARD NORME INTERNATIONALE colour inside Low-voltage surge protective devices – Part 22: Surge protective devices connected to telecommunications and signalling networks – Selection and application principles Parafoudres basse tension – Partie 22: Parafoudres connectés aux réseaux de signaux et de télécommunications – Principes de choix et d'application IEC 61643-22:2015-06(en-fr) THIS PUBLICATIO