AS 61869.14:2021 pdf free download.Instrument transformers Part 14: Additional requirements for current transformers for DC applications (IEC 61869-14:2018 (ED 1.0) MOD).
This part of IEC 61869 provides all requirements specific to current transformers to be used in DC applications (DCCTs), whatever the technology used. The output signal can be analogue or digital.
It is applicable to newly manufactured current transformers used for measuring, protection and/or control applications in DC power systems with a rated voltage above 1,5 kV.
The general configuration of a single-pole low-power instrument transformer is described in Figure 601 of IEC 61869-6:2016.
The DCCTs intended for current measurement in the transistor branch of the VSC valve (referred to as CT4a and CT4b in Figure 1403 and Table 1402) are not covered by this document, and will be considered in a future revision.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Clause 2 of IEC 61869-6:2016 is applicable, with the following additions and modifications:
IEC TS 60815-4:2016, Selection and dimensioning of high-voltage insulators intended for use in polluted conditions — Part 4: Insulators for DC systems
IEC TS 61245:2015, Artificial pollution tests on high-voltage ceramic and glass insulators to be used on DC systems
IEC 61869-6:2016, Instrument transformers — Part 6: Additional general requirements for lowpower instrument transformers
IEC 61869-9:2016, Instrument transformers — Part 9: Digital interface for instrument transformers
3 Terms and definitions
Clause 3 of IEC 61869-1:2007, of IEC 61869-6:2016 and of IEC 61869-9:2016 are applicable with the following additions and modifications.
3.1 General definitions
3.1.1401 instrument transformer for DC application
instrument transformer intended to be used in DC applications with at least one of the following functions:
• measure DC current or DC voltage (with significant harmonics);
• withstand DC voltage.
3.1.1402 current transformer for DC application DCCT instrument transformer for DC application in which the secondary signal, under normal conditions of use, is substantially proportional to the primary current
Note 1 to entry: The different applications are described in the introduction.
3.2 Definitions related to dielectric ratings
3.2.2 highest voltage for equipment
Definition 3.2.2 of IEC 61869-1:2007 is replaced by the following one:
highest value of DC voltage for which the equipment is designed to operate continuously, in respect of its insulation as well as other characteristics that relate to this voltage
3.3 DefInitions related to current ratings
3.3.1401 DC overload current
overcurrent occurring in an electric circuit, which is not caused by a short-circuit or an earth fault
Note 1 to entry: The DC overload current is specified by the customer in terms of value and duration.
ISOURCE: IEC 60050-826:2004, 826-11-15, modified — “DC” added in the term and Note ito entry added.AS 61869.14 pdf download.
Tags: Instrument transformers
-
AS/NZS 60335.2.11:2020 pdf free download.Household and similar electrical appliances- Safety Part 2.11: Particular requirements for tumble dryers (IEC 60335-2-11 Ed 8, MOD). 7.10 Addition: If the off position is only indicated by letters, the word “off” shall be used. 7.12 Addition: The instructions shall state — the maximum mass of dry textile material in kilograms to be used in the appliance; — that the tumble dryer is not to be used if industrial chemicals have been used for cleaning; — that the lint trap has to be cleaned frequently, if applicable; — that lint must not to be allowed to accumulate around the tumble dryer (not applicable for appliances intended to be vented to the exterior of the building); — that adequate ventilation has to be provided to avoid the back flow of gases into the room from appliances burning other fuels, including open fires (this instruction is not required if the tumble dryer discharges the air into the room). If symbol ISO 7000-0790 (2004-01) is used, its meaning shall be explained. The instructions shall include the substance of the following. — Do not dry unwashed items in the tumble dryer. — Items that have been soiled with substances such…
-
AS ISO 37100:2020 pdf free download.Sustainable cities and communities 一Vocabulary. 1 Scope This document defines terms relating to sustainable development in communities, smart community infrastructure and related subjects. 2 Normative references There are no normative references in this document. 3 Terms and definitions ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at http://www.iso.orgJobp — IEC Electropedia: available at httwwwe1e1ropetha.orgJ 3.1 Terms relating to sustainable development, resilience and smartness 3.1.1 sustainability state of the global system, including environmental, social and economic aspects, in which the needs of the present are met without compromising the ability of future generations to meet their own needs Note I to entry: The environmental, social and economic aspects interact, are interdependent and are often referred to as the three dimensions of sustainability. Note 2 to entry: Sustainability is the goal of sustainable development. [SOURCE: ISO Guide 82:2014, 3.1] 3.1.2 sustainable development development that meets the environmental, social and economic needs of the present without compromising the ability of future generations to meet their own needs Note ito entry: Derived from the Brundtland Report. Note 2 to entry: The Aalborg Charter provides further information on…
-
AS ISO 37104:2020 pdf free.Sustainable cities and communities – Transforming our cities一Guidance for practical local implementation of AS IsO 37101. This document provides guidance on how to implement and maintain a management system for sustainable development based on ISO 37101 principles, specifically in the context of cities, but applicable to other forms of settlement. This document: — provides guidance for practical implementation ofa managernentsystem for sustainable development in cities and other settlements, based on ISO 37101; — establishes a methodological framework forthe systematic evaluation ofthe sustainable development schemes and achievements in the city or other settlements, based on the cross-analysis of the six purposes of sustainability and the 12 areas of action of ISO 37101; — illustrates how other International Standards can be used to support successful implementation of ISO 37101, including, in particular, ISO 37120 (which recommends a suite of city indicators mapped against the six purposes of ISO 37101) and ISO 37106 (which provides practical guidance on how to implement joined-up delivery and innovation across organizational boundaries within the city or settlement). This document is intended for organizing bodies, decision-makers, executive officers and managers in cities — usually, in the first instance, the relevant local governments. This document…