BAS IEC 61643-12:2024

IEC 61643-12:2020 describes the principles for the selection, operation, location and coordination of SPDs to be connected to 50/60 Hz AC power circuits, and equipment rated up to 1 000 V RMS. These devices contain at least one non-linear component and are intended to limit surge voltages and divert surge currents.<br /> NOTE 1 Additional requirements for special applications are also applicable, If required.<br /> NOTE 2 IEC 60364 and IEC 62305-4 are also applicable.<br /> NOTE 3 This standard deal only with SPDs and not with surge protection components (SPC) integrated inside equipment.<br /> This third edition cancels and replaces the second edition published in 2008. This edition constitutes a technical revision.<br /> NOTE The following differing practice of a less permanent nature exists in the USA: In the USA, SPDs tested to Class I tests are not required. This exception applies to the entire document. This edition includes the following significant technical changes with respect to the previous edition:<br /> a) Scope: Deleted reference to 1 500 V dc<br /> b) Added or revised some definitions<br /> c) Added new clause 4 on Need for protection<br /> d) Added new information on disconnecting devices<br /> e) Revised Characteristics of SPD<br /> f) Revised List of parameters for SPD selection<br /> g) Added new information on Measured Limiting Voltage<br /> e) Added or revised some Annexes