Low-voltage surge protective devices - Surge protective devices connected to telecommunications and signalling networks. Selection and application principles1 Scope 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).

type and class which are described in BS 1702

BS EN ISO 22870:2016 supersedes BS EN ISO 22870:2006

BS EN ISO 28927-5:2009+A1:2015 replaces ISO 8662-6:1994

volume) and evaluates the costs associated with material flows and energy uses

The requirements of a device-specific standard take priority over this International Standard

and transporting these components

measured in accordance with ISO 3965

and energy efficiency

or injury arising from the consumption of contaminated food and improve operational efficiency

and stimulates vendors to meet UK needs and market UK education internationally

superstructure and appendages

This document deals with: