Guide to the lightning impulse and switching impulse testing of power transformers and reactors
Gives guidance and explanatory comments on the existing procedures for lightning and switching impulse testing of power transformers to supplement the requirements of IEC 60076-3. Also generally applicable to the testing of reactors, see IEC 60289, modification to power transformer procedures being indicated where required. Information is given on wave shapes, test circuits including test…
Low-voltage controlgear. Part 2: Semiconductor contactors (solid state contactors)
Applies to semiconductor contactors intended for performing electrical operations by changing the state of electric circuits between on state and off state. The main circuit of the semiconductor contactors is intended to be connected to circuits the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.
Disturbances in supply systems caused by household appliances and similar electrical equipment - Par...
Applicable to electrical and electronic equipment for household and similar use, intended to be connected to low-voltage a.c. distribution systems. Gives general requirements and maximum permissible values of harmonics components of the input current which may be produced by a piece of equipment tested individually under specified conditions, practical methods of type tests and guidance on the…
Disturbances in supply systems caused by household appliances and similar electrical equipment - Par...
Specifies limits of voltage fluctuations which may be produced by an individual appliance, when tested under specified conditions and methods of test and calculation (these requirements should not be confused with requirements relating to the quality of the supply connected to the consumer).
Basic environmental testing procedures - Part 2-46: Tests - Guidance to test Kd: Hydrogen sulphide t...
Gives guidance on the effect of hydrogen sulphide on electrical contacts and the significance of the test in IEC 68-2-43 on the behaviour of contacts exposed to such atmospheres.
The symbols system is intended for simplifying the preparation of diagrams of products in all branches of industry and is to be used in technical documentation as well as in technical and educational literature. This part contains the following: Motion of links of mechanisms, kinematic pairs, links and connections of their components, and N-bar linkages and their components.
Pipe connections, threaded to ISO 228/1, for plain end steel and other metal tubes in industrial app...
This second edition cacncels replaces the first edition (1973). Establishes a limited range of threads for connenction of tubes to machines or equipment and indicates the related outside diameters of the tubes. The outside diameters ranging from 4 mm up to and including 50 mm.
Aircraft — Joints for connecting crew members' regulator masks to oxygen sources
Gives joint lock dimensions for connecting these masks to sources in aircraft and helicopters. Joint dimensions standardization provides interchangeability with masks of various types. The basic dimensions and tolerances are shown in figures 1 and 2. Dimensions without tolerances can correspond to national standards. The lock halves shall be installed as shown in figures 1 and 2.
