PD CLC/TS 61643-22:2016

What is PD CLC/TS 61643-22 – Low-voltage surge protective devices about?

PD CLC/TS 61643-22 is an international standard and a part of the PD CLC/TS 61643 series that discusses the surge protective devices connected to telecommunications and signalling networks for low-voltage surge protective devices. SPDs are a cost-effective solution to prevent downtime, improve the system and data reliability, and eliminate equipment damage caused by transient voltages and surges for power and signal lines.

PD CLC/TS 61643-22 describes the principles for selecting, operating, locating and coordinating SPDs connected to telecommunication and signalling networks with nominal system voltages up to 1000 V r.m.s. a.c. and 1500 V d.c.

PD CLC/TS 61643-22 also addresses SPDs that incorporate protection for signalling lines and power lines in the same enclosure (so-called multiservice SPDs).

Who is PD CLC/TS 61643-22 – Low-voltage surge protective devices for?

PD CLC/TS 61643-22 on low-voltage surge protective devices applies to:

• Manufacturer of surge protective devices
• Quality testing of low-voltage surge protective device
• Electrical engineer

Why should you use PD CLC/TS 61643-22 – Low-voltage surge protective devices?

Multiservice surge protective device (MSPD) protects two or more services such as power, telecommunications, and signalling in a single enclosure in which a reference bond is provided between services during surge conditions.

PD CLC/TS 61643-22 provides you with the application of SPDs to protect equipment connected to telecommunications and signalling networks. The coupling mechanisms which mean coupling include a direct lighting strike to the structure and direct contact from the power system as well as capacitive, inductive and radiative coupling from both sources.

PD CLC/TS 61643-22 specifies the selection of SPDs for reducing lighting effects where the effects were depending on the over-voltage/over-current threat levels and SPDs characteristics, a single SPD is been used to protect the equipment within a building. Several protection levels are determined using a combination protection circuit in one SPD. Depending on equipment locations, a single SPD is been used to protect multiple zones within a building.

As a user of PD CLC/TS 61643-22, you can ensure the quality of surge protective devices by providing the risk treatment that considers the reduction of damage to the whole communication network.

What’s changed since the last update?

PD CLC/TS 61643-22:2016 supersedes DD CLC/TS 61643-22:2006 which is withdrawn. It includes:

• Update the use of multiservice SPDs (Article 8)
• Comparison between SPD classification of IEC 61643-11 and IEC 61643-21 (7.3.3)
• Consideration of new transmission systems as PoE (Annex F)
• EMC requirements of SPDs (Annex G)
• Maintenance cycles of SPDs (Annex I)