Category: EN standards

1 Scope and object This International Standard establishes requirements for the design qualification of balance- of-system (BOS) components used in terrestrial photovoltaic (PV) systems. This standard is suitable for operation in indoor, conditioned or unconditioned; or outdoor in general open-air climates as defined in IEC 60721 -2-1 , protected or unprotected. It is written for dedicated solar components such as […]

1 Scope This part of IEC 61 966 defines input test signals, measurement conditions, methods of measurement and reporting of the measured data, to be used for colour characterization and colour management of front projection displays in multimedia systems. Colour control within equipment is outside the scope of this part. It does not specify limiting values for various parameters. 2 […]

4.2 Functional requirements 4.2.1 Clear indication The voltage detector shall clearly indicate the presence and/or the absence of the system operating voltage as a function of the nominal voltage or nominal voltage range of the voltage detector, and its nominal frequency or nominal frequencies. 4.2.1 .1 Threshold voltage The indication “voltage present” shall appear if the voltage to ground on […]

1 Scope and object This part of IEC 61 000 for EMC immunity requirements applies to electrical and electronic apparatus intended for use in industrial environments, as described below. Immunity requirements in the frequency range 0 Hz to 400 GHz are covered. No tests need to be performed at frequencies where no requirements are specified. This generic EMC immunity standard […]

5.1 Mount the reference device as near as possible to and co-planar with the specimen on the two-axis tracker. Both shall be normal to the direct solar beam within ±5°. Connect to the necessary instrumentation. 5.2 If the specimen and reference device are equipped with temperature controls, set the controls at the desired level. If temperature controls are not used: […]

1 Scope and object This clause of Part 1 is applicable except as follows: Addition at the end of the first paragraph: This standard gives additional requirements for single- and two-pole circuit-breakers which, in addition to the above characteristics, are suitable for operation with direct current, and have a rated d.c. voltage not exceeding 220 V for single-pole and 440 […]

1 General data 1 .1 Recommended method(s) of mounting (to be inserted) See 1 .4.2 of IEC 60384-23. 1 .2 Dimensions When there is no case size reference, Table 1 may be omitted and the dimensions shall be given in Table 2, which then becomes Table 1 . The dimensions shall be given as maximum dimensions or as nominal dimensions […]

3.1 sound pressure level throughout this standard all sound pressure levels (abbreviated SPL) are referred to 20 μPa 3.2 pinna simulator device which has the approximate shape and dimensions of a median adult human pinna 3.3 ear simulator device for measuring the output sound pressure level of an earphone under well defined loading conditions in a specified frequency range. It […]

1 Scope This European Standard applies to newly manufactured static watt-hour meters intended for residential, commercial and light industrial use, of class indexes A, B and C, for the measurement of alternating current electrical active energy in 50 Hz networks. It specifies particular requirements and type test methods. It applies to static watt-hour meters for indoor and outdoor application, consisting […]

1 Scope This European Standard harmonises the standardisation of symmetrical, coaxial and optical cables used for the infrastructure of communication, multimedia and control networks. Most of the cables covered by this European Standard are primarily intended to be used in IT networks. However, they can also be used for other applications with the exception of those which presume a direct […]