EN 60947-8:2003

EN 60947-8:2003 is a standard published by CLC. Its full title is "Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines". This standard covers: Specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to EN 60034-11, and the industrial application. It specifies rules for that type of system comprising a positive temperature coefficient (PTC) thermistor detector having particular characteristics, and its associated control unit. The PT100 detectors are covered by EN 60751, where the resistor values are given according to the temperatures of the detector. The present rules lay down the characteristics of association of this particular positive temperature coefficient thermistor detector and its associated control unit (designated Mark A detector and Mark A control unit), when they are used in thermal protection systems. NOTE It is not possible to specify all the requirements for the operating characteristics of a control unit, as they are dependent on some aspects of the thermal detectors. Some aspects of the requirements of the thermal protector system can only be specified when account is taken of the characteristics of the rotating machine to be protected and the method of installation of the detector within the machine. For these reasons, for each characteristic it is necessary to specify who is responsible for stating the required values and who is responsible for compliance with the requirement and for carrying out any confirmatory test.

Specifies rules for control units, which perform the switching functions in response to the thermal detectors incorporated in rotating electrical machines according to EN 60034-11, and the industrial application. It specifies rules for that type of system comprising a positive temperature coefficient (PTC) thermistor detector having particular characteristics, and its associated control unit. The PT100 detectors are covered by EN 60751, where the resistor values are given according to the temperatures of the detector. The present rules lay down the characteristics of association of this particular positive temperature coefficient thermistor detector and its associated control unit (designated Mark A detector and Mark A control unit), when they are used in thermal protection systems. NOTE It is not possible to specify all the requirements for the operating characteristics of a control unit, as they are dependent on some aspects of the thermal detectors. Some aspects of the requirements of the thermal protector system can only be specified when account is taken of the characteristics of the rotating machine to be protected and the method of installation of the detector within the machine. For these reasons, for each characteristic it is necessary to specify who is responsible for stating the required values and who is responsible for compliance with the requirement and for carrying out any confirmatory test.

EN 60947-8:2003 is classified under the following ICS (International Classification for Standards) categories: 29.130.20 - Low voltage switchgear and controlgear. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 60947-8:2003 has the following relationships with other standards: It is inter standard links to EN IEC 60947-8:2023, EN ISO 14272:2001, EN 61000-4-3:2002, EN 61000-4-11:1994/A1:2001, EN 61000-4-2:1995/A2:2001, EN 61000-4-8:1993/A1:2001, EN 55022:1998/A1:2000, EN 55011:1998, EN 61000-4-2:1995/A1:1998, EN 61000-4-13:2002, EN 61000-4-8:1993, EN 60738-1:1999, EN 61000-4-4:1995/A2:2001, EN 60947-5-1:1997/A1:1999, EN 60947-5-1:1997/A2:2000. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 60947-8:2003 is associated with the following European legislation: EU Directives/Regulations: 2004/108/EC, 2004/108/EU, 2006/95/EC, 2014/30/EU, 2014/35/EU, 2014/53/EU, 73/23/EEC, 89/336/EEC; Standardization Mandates: M/404. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

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