Standards

This international standard applies to single- phase and three phase oil - immersed power transformers including auto-transformer with the exception of certain small and special transformers as defined in the scope of IEC 60076-1 It identifies transformer windings to their highest voltage for equipment Un associated with their corresponding rated insulation levels and details the relevant applicable dielectric tests and minimum external clearances in air between live parts of bushing and to objects at earth potential.

This part of IEC 60076 gives guidance and explanatory comments on the existing procedures for lighting and switching impulse testing of power transformers to supplement the requirements of IEC 60076-3 . It is also generally applicable to the testing of reactors (see IEC 60289 modification to power transforming procedures being indicated where required.

This part of IEC 60076 identifies the requirements for power transformers to sustain without damage the effects of overcurrent's originated by external short circuits. It describes the calculation procedures used to demonstrate the thermal ability of a power transformer to withstand such overcurrent's 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 the IEC 60076-1

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

This standard applies transformers complying with the series of publication IEC 60076. It is intended to provided information to users about .Certain fundamental services characteristics of different transformer connections and magnetic circuit designs, with particular reference to zero-sequence phenomena.

This part of IEC 60076 provides supporting information to help both manufactures and purchasers apply the measurement techniques described in IEC 60076-10 . The sources and characteristics of transformer and reactor sound are described. Practical on making measurements is given , and factors that may influence the accuracy of the methods are discussed. The applications 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.

This part International standard IEC 76 identifies transformers according to their cooling methods, defines temperature limits details the methods of test for temperature -measurement it applies to transformers as defined in the scope of IEC 76-1.

This standard applies to the dimensional, mechanical and electrical requirements for non perforated blank and pre-recorded magnetic tape and for the associated recording and reproducing systems such as reel-to-reel, cassette and cart . The methods of measurements and the necessary tolerance to secure interchangeability of recordings are included.

This part of IEC 107 deals with the general methods of measurement of the audio channels of receivers for monophonic systems and multichannel sound systems. General considerations for the measurement are specified in IEC 107-1 and the measurement specific to multichannel sound systems are dealt with by IEC 107-3, IEC 107-4 and IEC 107-5 measurements for non-broadcast signals are dealt with by IEC 107-6.

The methods of measuring the electrical characteristics described in this standard apply particularly to broadcast television receivers designed for the reception of multichannel sound systems using subcarriers.