Safety of transformers, reactors, power supply units and combinations thereof - Particular requirements and tests for constant voltage transformers and power supply units for constant voltageWhat is BS EN 61558 2 12 Transformers and power supply units for constant voltage about? BS EN 61558 2 12 deals with the safety of constant voltage transformers for general applications and power supply units for constant voltage for general applications. Constant voltage transformers incorporating electronic circuits are also covered by BS EN 61558 2 12. BS EN 61558 2 12 is applicable to transformers, and power supply (linear) with internal operating

BS EN 16842-3 specifies the requirements and test procedures for 360° visibility of reach trucks with a sit-on or stand-on operator without a load with a capacity up to and including 10 000 kg in accordance with ISO 5053-1 and it is intended to be used in conjunction with EN 16842-1

the requirements for “in-house” QCMs are less demanding than those for a certified reference material (CRM)

This part of this Standard specifies material

IEC 61340-4-1:1998

field-engineered spas

This British Standard specifies requirements for the testing of substrates (the growing medium) for constructed green roofs intended to provide long term support for specified plant communities

Ores containing very high quantities of hematite or magnetite (greater than about 60% iron) are known as "natural ore" or "direct shipping ore"

BS EN 136002 on <keyword> is useful for:

BS EN 61300-2-2 is an International Standard that discusses the test and measurement procedures for fibre optic interconnecting devices and passive components

BS EN 285 addresses the environmental aspects of steam sterilisers

The liquid hydrocarbon industry

NOTE: The risks associated with installations used for the bulk processing of explosives or flammable liquids and gases necessitate special consideration which is beyond the scope of BS 7974 and its supporting documents