Free Standards Download

IEEE ANSI C63.6-1996 pdf download American National Standard Guide for the Computation of Errors in Open-Area Test Site Measurements 1.Scope This guide shows the basis for the acceptability criterion of +4 dB for the site attenuation measurementsrequired...

IEEE C37.2-1996 pdf download IEEE Standard Electrical Power System Device Function Numbers and Contact Designations 1. Overview 1.1 Scope This standard applies to the definition and application of function numbers for devices used in electrical substationsand generating...

IEEE C37.9-1999 pdf download IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis 1.Scope This test procedure summarizes the various tests that are made on ac high-voltage indoor and outdoor circuitbreakers....

IEEE C37.11-1997 pdf download IEEE Standard Requirements for Electrical Control for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis 1.Overview 1.1 Scope This standard applies to all types of electrically controlled ac high-voltage circuit breakers...

IEEE C37.17-1997 pdf download American National Standard for Trip Devices for AC and General Purpose DC Low Voltage Power Circuit Breakers 1. General 1.1 Scope This standard pertains to: 1) direct-acting overcurrent electro-mechanical trip devices 2) direct-acting...

IEEE C37.20.4-1996 pdf download IEEE Trial-Use Standard for Indoor AC Switches (1 kV–38 kV) for Use in Metal- Enclosed Switchgear 1.Scope This standard covers indoor ac medium-voltage switches for use in enclosures for application in power circuits...

IEEE C37.30-1997 pdf download IEEE Standard Requirements for High- Voltage Switches 1.Overview This standard applies to all high-voltage enclosed indoor or outdoor, and non-enclosed indoor or outdoor, switchesrated in cxcess of 1000 V. This includes such switch...

IEEE C37.90.2-1995 pdf download IEEE Standard for Withstand Capability of Relay Systems to Radiated Electromagnetic Interference from Transceivers 5. Test conditions 5.1 Selection and preparation of samples 5.1.1 Relay systems Static protective or control relays, when supplied...

IEEE C37.110-1996 pdf download IEEE Guide for the Application of Current Transformers Used for Protective Relaying Purposes 1. Overview 1.1 Scope This standard describes the characteristics and classification of current transformers (cts) used for protective relayingIt also...

IEEE C37.111-1999 pdf download IEEE Standard Common Format for Transient Data Exchange (COMTRADE) for Power Systems 1. Overview 1.1 Scope This standard deÞnes a format for Þles containing transient waveform and event data collected from power systems...