Applies to coupling devices for power line carrier (PLC) systems which are connected between the coupling capacitor(s) and the carrier-frequency connection to the PLC terminal and gives requirements for safety, protection, isolation and carrier-frequency.
Safety requirements for electronic flash apparatus for photographic purposes
Applies to the following electronic flash apparatus for photographic purposes, having a stored energy not exceeding 2 000 J, together with associated apparatus and not intended to be subjected to dripping or splashing: apparatus of the single flash type; apparatus for the illumination of sequential photographic exposures; battery chargers and supply units to be used in connection with electronic…
Applies to supply apparatus with stabilization, which is designed to supply calibrated values of voltage and/or current in connection with electrical measurement and to accessories used with this apparatus. Specifies the essential electrical characteristics. Defines the special terms related to this apparatus. Specifies methods for testing these types of apparatus in order to verify compliance…
Gives the requirements for 127 mm and 203 mm connections for the purpose of air-conditioning from ground sources. The conncetions shall comply with the basic dimensional requirements shown in either figure 1 or figure 2 as appropriate. The ground unit must not project more than 14,O mm beyond the sealing plane except through defined openings.
Fluid flow in closed conduits — Connections for pressure signal transmissions between primary and se...
Describes means whereby a pressure signal from a primary element can be transmitted by known techniques to a secondary device in such a way that the value of the signal is not distorted or modified even though it may be changed into a signal of a different nature. Is concerned only with the pressure difference techniques of flow measurement.
Gives the dimensions of 19 mm and 38 mm bore pressure connections. A space envolope is also specified for each size of connection. Dimensions and tolerances for connections are given in figures 1 and 3, and those for space envelopes in figures 2 and 4. The values are listed in tables.
Recommendation for capacitors for inductive heat generating plants operating at frequencies between ...
Applies to indoor capacitor units and indoor capacitor banks complete with accessories which are intended for connection to adjustable a.c. voltage systems, to operate in a frequency range from 40 to 24 000 Hz, for power factor correction, especially for inductive heating; and also for otherwise modifying the characteristics of a circuit, such as voltage and frequency. It applies to capacitors…
