IEC 60986 FREE DOWNLOAD

Neglecting the -zero-sequence capacitances of lines in earthed neutral systems leads to results which are slightly higher than the real values of the short-circuit currents. Find Similar Items This product falls into the following categories. This third edition cancels and replaces the second edition published in and constitutes a technical revision. For vertical cable-connection the displacement and the tensile force onto the lower fixing point may now be calculated. Except for special cases, the zero-sequence short-circuit impedances at the short-circuit location differ from the positive-sequence and negative-sequence short-circuit impedances. Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. The faster, easier way to work with standards.

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When calculating unbalanced short-circuit currents in medium- or high-voltage systems and applying an equivalent voltage source at the short-circuit location, the zero-sequence capacitances of lines and the zero-sequence shunt admittances are to be considered for isolated. The main changes with respect to the previous edition are: The subclause for determination of the thermal equivalent short-circuits current has 6098 deleted it is now part lec IEC This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.

IEC 60986:2000/AMD1:2008

Click to learn more. Accept and continue Learn more about the cookies we use and how to change your settings. In this case, the three-fold zero-sequence current flows through the joint return. Except for special cases, the zero-sequence short-circuit impedances at the short-circuit location differ from the positive-sequence and negative-sequence short-circuit impedances. Short-circuit currents - Calculation of effects - Part 1: The initial symmetrical short-circuit currents riQ,, and riQm, on the high-voltage side of the trans- former shall be given by the supply company or 609886 an adequate calculation according to this standard.

The deviation 609886 on the configuration of the network.

IEC /AMD - European Standards

For information on cookies, please look at our privacy statement. The capacitances ieec lines overhead lines and cables of low-voltage networks may be neglected in the positive- negative- and zero-sequence system.

Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. Definitions and calculation methods. Shopping cart Your shopping cart is empty. The regulations for thermal effects of electrical equipment have been deleted. In special cases the zero-sequence lec short-circuit impedance of network feeders may need to be considered, depending on the winding configuration and the starpoint earthing of the transformer.

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Please download Chrome or Firefox or view our browser tips. Idc Number IEC The design of accessories and the influence of the installation conditions on the temperature limits are taken into consideration. Gives guidance on the short-circuit maximum temperature limits of electric cables having rated voltages from 6 kV.

The standard has been reorganized and some of the symbols have been changed to follow the conceptual characteristic of international standards. By continuing to use this website you are giving consent to cookies being used.

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Neglecting the -zero-sequence capacitances of lines in earthed neutral systems leads to results which are 609886 higher than the real values of the short-circuit currents.

Courants de court-circuit - Calcul des effects - Partie 1: For vertical cable-connection the 06986 and the tensile force onto the lower fixing point may now be calculated. Enviado por Suco flag Denunciar. This third edition cancels and replaces the second edition published in and constitutes a technical revision.

The faster, easier way to work with standards. Your basket is empty. It contains procedures for the calculation of: