High voltage direct current (HVDC) substation audible noise1 Scope This technical specification applies to the specification and evaluation of outdoor audible noise from high voltage direct current (HVDC) substations. It is intended to be primarily for the use of the utilities and consultants who are responsible for issuing technical specifications for new HVDC projects with and evaluating designs proposed by prospective contractors. It is primarily intended for HVDC projects with line commutated converters.

This International Standard specifies the technical requirements for the design and the testing of automotive Liquefied Petroleum Gas (LPG) containers

HV and EHV power systems

This part of ISO 3937 specifies the dimensions of cutter arbors with tenon drive and with hollow taper interface with flange contact surface (HSK)

a)       The figures have been updated to show more modern technology

the microgrid

— indications of intended positions of graphical elements

standard methods for testing and ratings are established

Semiconductor optoelectronic devices such as the LED

are sources of ignition for LPG

Using BS EN 62150-3 you can specify the test requirements and procedures for qualifying optical devices for sensitivity to coupled power variations induced by mechanical disturbance at the optical ports of the device

This edition includes the following significant technical changes with respect to IEC 60345:

for flange couplings in heat resisting steel for inch series aerospace applications