DOWEI

IEC 60076-2 Power transformers - Temperature rise

This part of IEC 60076 applies to liquid-immersed transformers, identifies power transformers according to their cooling methods, defines temperature rise limits and gives the methods for temperature rise tests.

IEC 60076-5 Power transformers –Ability to withstand short circuit

This part of IEC 60076 identifies the requirements for power transformers to sustain without damage the effects of overcurrents originated by external short circuits. It describes the calculation procedures used to demonstrate the thermal ability of a power transformer to withstand such overcurrents and both the special test and the theoretical evaluation method used to demonstrate the ability to withstand the relevant dynamic effects. The requirements apply to transformers as defined in the scope of IEC 60076-1.

IEC 60076-6 Power transformers –Part 6 Reactors

Where IEC standards do not exist for small or special reactors, this part of IEC 60076 may be applicable as a whole or in part.

IEC 60076-7 Loading guide for mineral-oil-immersed power transformers

This part of IEC 60076 is applicable to mineral-oil-immersed transformers. It describes the effect of operation under various ambient temperatures and load conditions on transformer life.

IEC 60076-10-1 Power Transformer-Determination of sound levels

This part of IEC 60076 provides supporting information to help both manufacturers and purchasers apply the measurement techniques described in IEC 60076-10. The sources and characteristics of transformer and reactor sound are described. Practical guidance on making measurements is given, and factors that may influence the accuracy of the methods are discussed. This application guide also clarifies those factors which should be agreed between manufacturer and purchaser when specifying a transformer or reactor, and indicates why values measured in the factory may differ from those measured on site.

IEC 60871-1 Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V

This part of IEC 60871 is applicable to both capacitor units and capacitor banks intended to be used, particularly, for power-factor correction of a .c . power systems having a rated voltage above 1 000 V and frequencies of 15 Hz to 60 Hz .

IEC 61869-1 Instrument transformers – Part 1: General requirements

This part of IEC 61869 is applicable to newly manufactured instrument transformers intended for applications where the nominal voltage is higher than 1 kV AC or 1,5 kV DC, with an analogue or a digital secondary signal for measuring, protection and control purposes, with rated frequencies from 15 Hz to 400 Hz, or for DC applications.

IEC 61869-5 Instrument transformers – Part 5: Additional requirements for capacitor voltage transfor

This part of IEC 61869 applies to new single-phase capacitor voltage transformers connected between line and ground for system voltages Um  72,5 kV at power frequencies from 15 Hz to 100 Hz. They are intended to supply a low voltage for measurement, control and protective functions.

IEC 61936-1 Power installations exceeding 1 kV a.c. – Part 1: Common rules

This part of IEC 61936 provides common rules for the design and the erection of electrical power installations in systems with nominal voltages above 1 kV a.c. and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended.

IEC 62271-1 High-voltage switchgear and controlgear – Part 1: Common specifications for alternating

This part of IEC 62271 applies to AC switchgear and controlgear designed for indoor and/or outdoor installation and for operation at service frequencies up to and including 60 Hz and having rated voltages above 1 000 V.

IEC 62271-100 High-voltage switchgear and controlgear – Part 100: Alternating-current circuit-breake

This part of IEC 62271 is applicable to three-phase AC circuit-breakers designed for indoor or outdoor installation and for operation at frequencies of 50 Hz and/or 60 Hz on systems having voltages above 1 000 V. This document includes only direct testing methods for making- breaking tests. For synthetic testing methods refer to IEC 62271-101.

IEC 62271-102 High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors

This part of IEC 62271 applies to alternating current disconnectors and earthing switches, designed for indoor and outdoor installations for nominal voltages above 1 000 V and for service frequencies up to and including 60 Hz.

IEC 62271-103 High-voltage switchgear and controlgear – Part 103: Alternating current switches for r

This part of IEC 62271 is applicable to three-phase, alternating current switches and switch- disconnectors for their switching function, having making and breaking current ratings, for indoor and outdoor installations, for rated voltages above 1 kV up to and including 52 kV and for rated frequencies from 16 2/3 Hz up to and including 60 Hz. This document is also applicable to single-pole switches used on three-phase systems.

IEC 62271-200 High-voltage switchgear and controlgear–Part 200: AC metal-enclosed switchgear and con

Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV