IEC 61811-1:20 15适用于机电电信初级继电器。根据本标准的继电器被提供用于电信应用中的操作。然而，作为机电基本继电器，它们也适用于特定的工业和其它应用。本标准从IEC 61810系列和其他来源中选择适当的试验方法，用于从本规范导出的详细规范中，并包含根据本标准准备此类规范时使用的基本试验时间表。 详细的测试时间表包含在详细质量标准中。 本第二版IEC 61811-1取消并取代了1999年发布的IEC 61811-1、2002年发布的IEC 61811-10、2002年发布的IEC 61811-11、IEC 61811-50、2002年发布的IEC 61811-51、2002年发布的IEC 61811-52、2002年发布的IEC 61811-53、2002年发布的IEC 61811-54、2002年发布的IEC 61811-55，并构成技术修订。与之前的版本相比，此版本包括以下重大技术变更: a)获得一份电信中继文件； b)更新所有相关参考文献。

IEC 61811-1:2015 applies to electromechanical telecom elementary relays. Relays according to this standard are provided for the operation in telecommunication applications. However, as electromechanical elementary relays, they are also suitable for particular industrial and other applications. This standard selects from IEC 61810 series and other sources the appropriate methods of test to be used in detail specifications derived from this specification, and contains basic test schedules to be used in the preparation of such specifications in accordance with this standard. Detailed test schedules are contained in the detail specifications. This second edition of IEC 61811-1 cancels and replaces IEC 61811-1 published in 1999, IEC 61811-10 published in 2002, IEC 61811-11 published in 2002, IEC 61811-50 published in 2002, IEC 61811-51 published in 2002, IEC 61811-52 published in 2002, IEC 61811-53 published in 2002, IEC 61811-54 published in 2002, IEC 61811-55 published in 2002, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous editions:
a) to get one document for telecom relays;
b) update all relevant references.