Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - ...
States the characteristics of control circuit devices, the electrical and mechanical requirements, the various duties to be performed, the significance of the rated characteristics and of the markings, the tests to verify the rated characteristics, the functional requirements to be satisfied by the control circuit devices, environmental conditions, including those of enclosed equipment,…
Recommended methods of measurements on receivers for television broadcast transmissions - Part 5: El...
Applies to television receivers designed for the reception of television broadcasts using the two-channel digital sound system. The sound coding-system is based on NICAM 728 and is transmitted by a quadrature phase-shift keying (QPSK) modulated digital subcarrier. This consolidated version consists of the first edition (1992) and its amendment 1 (1999). Therefore, no need to order amendment in…
Recommended methods of measurement on receivers for television broadcast transmissions - Part 4: Ele...
Applies to television receivers designed for the reception of television broadcast transmissions with multichannel sound using the two-carrier FM system. This consolidated version consists of the first edition (1988) and its amendment 1 (1999). Therefore, no need to order amendment in addition to this publication.
Guide to the Implementation of ISO 14001 at Airports
1. Background
1.1 Environmental Management Systems and ISO 14001
An environmental management system (EMS) can be thought of as the application of general management principles to the enviro nmental issues associated with an organization's activities, products, and services. It provides a framework within which an organization can systematically identify and manage those elements…
Electric cables - Calculation of the current rating - Part 3-1: Sections on operating conditions - R...
Is applicable to the conditions of steady-state operation of cables at all alternating voltages, and direct voltages up to 5 kV, buried directly in the ground, in ducts, troughs or in steel pipes, both with and without partial drying-out of the soil, as well as cables in air. This section concerns reference operatings and selection of cable type. This consolidated version consists of the first…
Auxiliaries for lamps - Capacitors for use in tubular fluorescent and other discharge lamp circuits ...
Specifies the requirements for both self-healing and non-self-healing continuously rated a.c. capacitors of up to and including 2,5 kvar, and not less than 0,1 F, having a rated voltage not exceeding 1 000 V, which are intended for use in discharge lamp circuits operating at 50 Hz or 60 Hz and at altitudes up to 3 000 m. Does not cover radio-interference suppressor capacitors the requirements for…