Draft Standards

This standard defines specifications for the representation of mobile health minimum metadata, data related to sleep and physical activity. Data pertaining some environmental variables, surveys, and relevant units of measure and value sets are defined because they are needed for the representation...

This guide applies to surge-protective devices (SPDs) intended for connection to 50 Hz to 60 Hz ac power circuits rated 1000 V RMS or less. This guide describes the effects on SPDs of power system disturbances occurring in these low-voltage ac power circuits. The disturbances are not limited to...

The C62.42 guide series overs surie prote ctve components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports. This part covers positive temperature coefficient (PTC) thermistor components These SPCs are operated by self-heating and is automatically reset after the...

This standard specifies the requirements of Phasor Data Concentrators (PDCs) for power systems. It includes requirements for: a) Data aggregation b) Processing of synchrophasors and other synchronized data c) Data interfaces with other systems d) Handling of commands, configuration, and other...

This standard covers the design, testing, and installation of metal-enclosed switchgear that incorporates gas (typically SF6) at higher than ambient pressure as an insulation medium for alternating-current applications rated above 1 kV to 52 kV. Contents of switchgear may include but are not...

This guide is applicable to the methods of Dielectric Frequency Response (DFR) of liquid immersed transformers. The guide includes recommendations for instrumentation, procedures for performing the tests, and techniques for analyzing the data. This guide can be used in both field and factory...

This part of IEC 61869 establishes a common viewpoint of the evaluation of uncertainty in calibration and its application in testing of Instrument Transformers (IT) used for a.c (in the frequency range 15Hz - 3kHz) covering Low Voltage (LV) as well as High Voltage (HV). This part of IEC 61869...

This standard is intended to define the requirements for current transformers with a maximum of secondary output of 250 milliamperes. These requirements of ratios, Accuracy classes, burdens and test methods supplement but are not subordinate to IEEE C57.13™ Standard Requirements for Instrument...

This document provides the mapping expressing corresponding relations between software life cycle processes in ISO/IEC/IEEE 12207-1:2017 and the processes in the previous edition ISO/IEC/IEEE 12207:2008. These relations are demonstrated by means of mapping tables that show relationships between...

This Guide provides protection methods for different types of Phase Shifting Transformers (PST) and discusses the interaction between protection and operating conditions of PSTs. Models representing PSTs to determine short circuit currents for relaying functions are presented. Sizing and location...

This standard applies to the avalanche breakdown diodes 1 used for surge protection on systems with voltages equal to or less than 1000 V rms or 1200 V dc. The avalanche breakdown diode surge suppressor is a semiconductor diode which can operate in either the forward or reverse direction of its V-I...

This standard defines environmental and corporate social responsibility performance criteria for computer For the purposes of this standard, the definition of computer server aligns with ENERGY STAR Program Requirements for Computer Servers 2.11 This standard establishes criteria for multiple...