Low-voltage surge protective devices Part 22: Surge protective devices connected to telecommunications and signalling networks Selection and application principles
|Publication Date:||1 November 2004|
|ICS Code (Power transmission and distribution networks):||29.240|
|ICS Code (Substations. Surge arresters):||29.240.10|
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.