Safety of household and similar electrical appliances - Part 2: Particular requirements for battery ...
This standard deals with the safety of battery chargers for
household and similar use having an output at safety extra-low voltage, their rated voltage being not more than 250 V.
Is to be used in conjunction with IEC 335-1 (third edition).
Askarels for transformers and capacitors. Part 4: Guide for maintenance of transformer askarels in e...
The purpose of this guide is to assist the power equipment operator in evaluating askarels in transformers, reactors and accessory equipment operated at power frequencies and in his efforts to maintain askarels in serviceable condition. It recommends standardized tests and evaluation procedures. Methods are outlined for reconditioning and reclaiming askarels whenever necessary. Precautions are…
This standard has been prepared as a guide for the application of
the International System of Units (SI). Information is included
on SI units, recommended application of multiples and
sub-multiples of the units, up-to-date terminology concerning the
names of quantities, conversion factors that relate the SI and
the yard/pound system, conversion and rounding of data, and dual
dimensioning.
Covers the writing, typing, and printing of dates and times when
all-numeric forms are used, and is applicable for general use. It
is more restrictive than, but is not in conflict with, the
relevant ISO standards. It departs from International Standard
ISO 3307, Information interchange Representations of time of
the day, only in that the use of 24:00:00 is permitted in
addition to 00:00:…
Method for the determination of the proof and the comparative tracking indices of solid insulating m...
Specifies the method of test for the determination of the proof and comparative tracking indices of solid insulating materials on pieces taken from parts of equipment and on plaques of material using alternating voltages. The standard provides for the determination of erosion when required. Test results cannot be used directly for the evaluation of safe creepage distances when designing…
FORMERLY NUMBERED IEC 651
This standard describes instruments (sound level meters) for the measurement of certain frequency and time weighted sound pressure levels.
Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal vo...
Applies to post insulators and post insulator units of ceramic material or glass for indoor and outdoor service in electrical installations or equipment operating on alternating current with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz.
Notes:
- May also be regarded as a provisional standard for insulators for use on d.c. systems, see IEC 438…
