IEC 60831-1 pdf download
IEC 60831-1 pdf download.Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V 1 Scope and object This part of IEC 60831 is applicable to both capacitor units and capacitor banks intended to be used, particularly, for power-factor correction of a.c. power systems having a rated voltage up to...
IEC 61811-54 pdf download
IEC 61811-54 pdf download.Electromechanical all-or-nothing relays (1) The name of the national standards organization under whose authority the detail specifi- cation is published and, if applicable, the organization from whom the detail specification is available. (2) The IECQ symbol and the number allotted to the completed detail specification by the IECQ secretariat. (3) The number and the year of availability...
IEC 61850-3 pdf download
IEC 61850-3 pdf download.Communication networks and systems in substations 1 Scope and object This part of IEC 61850 applies to substation automation systems (SAS). It defines the communication between intelligent electronic devices (IEDs) in the substation and the related system requirements. The specifications of this part pertain to the general requirements of the communication network, with emphasis on the quality...
IEC 61982-2 pdf download
IEC 61982-2 pdf download.Secondary batteries for the propulsion of electric road vehicles 3 General test requirements 3.1 Accuracy of measuring instruments 3.1.1 Electrical measuring instruments 3.1.1.1 Range of measuring devices The instruments used shall enable the values of voltage and current to be correctly measured. The range of these instruments and measuring methods shall be chosen so as to ensure...
ISO IEC 20968 pdf download
ISO IEC 20968 pdf download.Software engineering — Mk II Function Point Analysis — Counting Practices Manual 1.1 Mk II FPA is used to measure the size of the functionality required by the users of an application, within a boundary defined for the purpose of the FP count. 1.2 The application or part of the application enclosed by the boundary must...
IEC 62262 pdf download
IEC 62262 pdf download.Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) 1 Scope This standard refers to the classification of the degrees of protection provided by enclosures against external mechanical impacts when the rated voltage of the protected equipment is not greater than 72,5 kV. This standard is only applicable to enclosures of...
IEC 61842 pdf download
IEC 61842 pdf download.Microphones and earphones for speech communications 1 Scope This standard applies to the microphone part and earphone part of handsets, headsets or earsets for speech communications, and also to the microphone units and earphone units of built-in handsets, headsets or earsets. The object of this standard is to establish definitions relating to these electroacoustic transducers, and to...
IEC 62278 pdf download
IEC 62278 pdf download,Railway applications – Specification and demonstration of reliability, availability, maintainability and safety (RAMS) 1 Scope 1.1 This International Standard – defines RAMS in terms of reliability, availability, maintainability and safety and their interaction; – defines a process, based on the system life cycle and tasks within it, for managing RAMS; – enables conflicts between RAMS elements to...
IEC 60688 pdf download
IEC 60688 pdf download.Electrical measuring transducers for converting a.c. electrical quantities to analogue or digital signals 1 Scope This International Standard applies to transducers with electrical inputs and outputs for making measurements of a.c. electrical quantities. The output signal may be in the form of an analogue direct current or in digital form. In this instance, that part of the...
IEC 60691 pdf download
IEC 60691 pdf download.Thermal-links – Requirements and application guide 1 Scope and object This International Standard is applicable to thermal-links intended for incorporation in electrical appliances, electronic equipment and component parts thereof, normally intended for use indoors, in order to protect them against excessive temperatures under abnormal conditions. NOTE 1 The equipment need not be designed to generate heat. NOTE...