DD IEC PAS 60044-5:2002 pdf download Instrument transformers — Part 5: Capacitor voltage transformers
This PAS which is a part of lnternational Standard IEC 60044 applies to new single-phasecapacitor voltage transformers connected between line and ground for system voltages Um 272,5 kV at power frequencies from 15 Hz to 100 Hz. They are intended to supply a lowvoltage for measurement, control and protective functions.
The capacitor voltage transformer can be equipped with or without carrier-frequencyaccessories for power line carrier-frequency (PLC) application at carrier frequencies from30 kHz to 500 kHz.
The future standard that should supersede the present PAS will replace the IEC 60186regarding capacitor voltage transformers.
Three standards formed the basis for this IEC-PAS 60044-5
IEC 60044-2;concerning inductive voltage transformers;
IEC 60358,concerning coupling capacitors and capacitor dividers;
IEC 60481, concerning coupling devices for power line carrier (PLC) systems.
The application measurement function includes both indication measuring and revenuemeasuring.
NOTE Diagrams of capacitor voltage transformer to which this document applies are glven in figures A.1 and A.2
2 Normative references
The following normative documents contain provisions which, through reference in this textconstitute provisions of this document, For dated references, subsequent amendments to, olrevisions of, any of these publications do not apply. However parties to agreements based onthis document are encouraged to investigate the possibility of applying the most recenteditions of the normative documents indicated below. For undated references, the latestedition of the normative document referred to applies. Members of ISO and IEC maintainregisters of currently valid International Standards.
EC 60028:1925,International standard of resistance for copper
IEC 60038:1983，IEC standard voltages
EC 60044-2:1997,Instrument transformers – Part 2: Inductive voltage transformers
EC 60050-321:1986,International Electrotechnica/ Vocabulary – Chapter 321: Instrumenttransformers
IEC 60050-436:1990International Electrotechnical Vocabulary – Chapter 436: Powercapacitors
EC 60050-601:1985,lnternational Electrotechnica/ Vocabulary – Chapter 601: Generationtransmission and distribution of electricity – General
EC 60050-604:1987,lnternational Electrotechnica/ Vocabulary – Chapter 604: Generation,transmission and distribution of electricity – Operation
EC 60060-1:1989,High-voltage test techniques – Part 1: General definitions and testrequirements
EC 60071-1:1993,Insulation co-ordination – Part 1: Definitions, principles and rules
EC 60085:1984Thermal evaluation and classification of electrical insulation
EC 60233:1974.Tests on hollow insulators for use in electrical equipment
IEC 60270:1981，Partial discharge measurements
IEC 60358:1990,Coupling capacitors and capacitor dividers
IEC 60481:1974，Coupling devices for power line carrier systems
EC 60815:1986,Guide for the selection of insulators in respect of polluted conditions
CISPR 18-2:1986， Radio interference characteristics of overhead power lines and highvoltage equipment – Part 2: Methods of measurement and procedure for determining limits
3 Definitions
For the purpose of this part of IEC 60044, the following definitions shall apply. Some of thesedefinitions are identical with or are similar to those of IEC 60050, Chapters 321, 436, 601and 604. These are indicated by the relevant IEV reference number in brackets
3.1 General definitions
3.1.1 capacitor voltage transformer (CVT)
a voltage transformer comprising a capacitor divider unit and an electromagnetic unit sodesigned and interconnected that the secondary voltage of the electromagnetic unit issubstantially proportional to the primary voltage, and differs in phase from it by an anglewhich is approximately zero for an appropriate direction of the connections and ratedfrequency.[IEV 321-03-14 modified]
3.1.2 rated frequency of a capacitor voltage transformer (f)the frequency for which the capacitor voltage transformer has been designed
3.1.3 standard reference range of frequency
the range of frequency for which the rated accuracy is applicable.
3.1.4 rated primary voltage (UPR)
the r.m.s. value of the primary voltage which appears in the designation of the capacitorvoltage transformer and on which its performance is based. [IEV 321-01-12 modified]
DD IEC PAS 60044-5:2002 pdf download
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