External a.c.. d.c. and a.c.. a.c. power supplies. Determination of no-load power and average efficiency of active modes1 Scope This European Standard specifies methods of measurement of electrical power consumption, and the reporting of results, for external power supplies. This standard is applicable to external power supplies with a rated input voltage within the range 100 V a. c. to 250 V a. c. having a single output with a rated output power not exceeding 250 W and a rated output voltage not exceeding 230 V a. c. or 325 V d. c. The output voltage may be either at

material finish

test circuit board

BS AU 209-1a on locking systems for passenger cars is useful for:

The human body is a good conductor of electricity

— classifies the testing as a function of construction and usage

the type 1 receivers should be used and

PD IEC/TR 61282-3 on fibre optic communication system designing is relevant to:

BS 5072-3 guides you with the procedure and calculation

Mechanical and electrical engineers

BS EN 60512-17-4 on assessing the cable torsion resistance of cable clamps is useful for:

Annex F (informative) Rationale for the tests

thermometers are calibrated for total immersion