IEC 61811-55 pdf download

IEC 61811-55 pdf download.Electromechanical all-or-nothing relays 1 General 1.1 Scope This part of IEC 61811 is a blank detail specification applicable to electromechanical all-or- nothing telecom relays of assessed quality. Relays according to this standard are provided for the operation in telecommunication applications. However, as electromechanical all-or- nothing relays, they are also suitable for particular industrial and other applications. This...