IEC 61857-21 pdf download
IEC 61857-21 pdf download Electrical insulation systems – Procedures for thermal evaluation – Part 21: Specific requirements for general-purpose models – Wire-wound applications 4.2 Model components The components of the model are as follows: a) Frame: The frame consists of a rigid supporting metal base with suitable stand-off insulators of porcelain or other appropriate material bolted to one end, and...
IEC 62047-6 pdf download
IEC 62047-6 pdf download Semiconductor devices – Micro-electromechanical devices – Part 6: Axial fatigue testing methods of thin film materials 1 Scope This International Standard specifies the method for axial tensile–tensile force fatigue testing of thin film materials with a length and width under 1 mm and a thickness in the range between 0,1 μm and 1 0 μm under...
IEC 62149-2 pdf download
IEC 62149-2 pdf download Fibre optic active components and devices – Performance standards – Part 2: 850 nm discrete vertical cavity surface emitting laser devices 4.3 Functional specification Functional specifications of all the subcategorized types, A1 , A2 and A3, for modulation speeds are listed in Annex A and Annex B, depending on the device types. 4.4 Diagrams Diagrams of...
IEC 62386-203 pdf download
IEC 62386-203 pdf download Digital addressable lighting interface – Part 203: Particular requirements for control gear – Discharge lamps (excluding fluorescent lamps) (device type 2) 1 Scope This International Standard specifies a protocol and test procedures for the control ofelectronic control gear by digital signals used on a.c. or d.c. supplies，associated withdischarge lamps (excluding fluorescent lamps). NOTE Tests in this...
IEC 62423 pdf download
IEC 62423 pdf download Type F and type B residual current operated circuit-breakers with and without integral overcurrent protection for household and similar uses 1 Scope The scope of lEC 61008-1 and lEC 61009-1 applies with the following additions. This standard specifies requirements and tests for Type F and Type B RCDs (ResidualCurrent Devices). Requirements and tests given in this...
IEC 62453-1-2009 pdf download
IEC 62453-1-2009 pdf download Field device tool (FDT) interface specification – Part 1: Overview and guidance 4 FDT overview 4.1 State of the art In industrial automation, a control system often comprises many binary and analog input/output signals transmitted via a communication network. Numerous field devices provided by different manufacturers have to be included in the network by direct connection...
IEC 62453-309 pdf download
IEC 62453-309 pdf download Field device tool (FDT) interface specification – Part 309: Communication profile integration – IEC 61784 CPF 9 5.2 DTM services to access instance and device data The services InstanceDataInformation and DeviceDataInformation shall provide access to at least to all parameters of the Universal and Common Practice commands (as far as the device supports the function). Furthermore,...
IEC 62467-1 pdf download
IEC 62467-1 pdf download Medical electrical equipment – Dosimetric instruments as used in brachytherapy – Part 1: Instruments based on well-type ionization chambers 4 General requirements 4.1 P ERFORMANCE REQUIREMENTS Each of the components of a WELL – TYPE CHAMBER SYSTEM shall comply with the individual requirements in the appropriate clauses or subclauses in addition to the general requirements. The...
IEC 62505-3-1 pdf download
IEC 62505-3-1 pdf download Railway applications – Fixed installations – Particular requirements for a.c. switchgear – Part 3-1: Measurement, control and protection devices for specific use in a.c. traction systems – Application guide 1 Scope This part of IEC 62505 provides assistance, guidance and requirements in the design of protection, control and measuring systems in a.c. installations at traction voltages...
IEC 62505-3-3 pdf download
IEC 62505-3-3 pdf download Railway applications – Fixed installations – Particular requirements for a.c. switchgear – Part 3-3: Measurement, control and protection devices for specific use in a.c. traction systems – Single-phase inductive voltage transformers 8 Ferro-resonance 8.1 General The following requirements, additional to those of IEC 60044-2:1 997, apply: The structure of railway electrification network may easily generate ferro-resonance...