Advanced Analyzers AA-HFA-3-75-Z-REF-Z-TEST | 3 ph, 75 A

IEC 61000-3-11 is concerned with the emission of voltage changes, voltage fluctuations and flicker produced by equipment and impressed on the public low-voltage supply system. IEC 61000-3-11 specifies the limits of voltage changes produced by equipment tested under specified conditions. IEC 61000-3-11 is primarily applicable to electrical and electronic equipment having a rated input current from 16 A up to and including 75 A, which is intended to be connected to public low-voltage distribution systems having nominal system voltages of between 220 V and 250 V, line-to-neutral at 50 Hz, and which is subject to conditional connection. This part of IEC 61000 is also applicable to equipment within the scope of IEC 61000-3-3 that does not meet the limits when tested or evaluated with reference impedance Zref and is therefore subject to conditional connection. Equipment that meets the requirements of IEC 61000-3-3, is excluded from this part of IEC 61000. Equipment tests made in accordance with IEC 61000-3-11 are type tests. Advanced Test Equipment Rentals can perform ISO17025 accredited calibration on products that abide by this standard. NOTE: The flicker limits specified in this part, the same as those in IEC 61000-3-3, are based on the subjective severity of the flicker imposed on the light from 230 V/60 W coiled-coil filament lamps when subjected to fluctuations of the supply voltage. For systems with nominal voltages less than 220 V, line-to-neutral and/or frequency of 60 Hz, the limits and reference circuit values are under consideration.

IEC 61000-3-12 deals with the limitation of harmonic currents injected into the public supply system. The limits given in this International Standard are applicable to electrical and electronic equipment with a rated input current exceeding 16 A and up to and including 75 A per phase, intended to be connected to public low-voltage a.c. distribution systems of the following types:   Nominal voltage up to 240 V, single-phase, two or three wires; Nominal voltage up to 690 V, three-phase, three or four wires; Nominal frequency 50 Hz or 60 Hz. Other distribution systems are excluded. The limits given in IEC 61000-3-12 apply to equipment when connected to 230/400 V, 50 Hz systems. IEC 61000-3-12 applies to equipment intended to be connected to low-voltage systems interfacing with the public supply at the low-voltage level. It does not apply to equipment intended to be connected only to private low-voltage systems interfacing with the public supply only at the medium- or high-voltage level. IEC 61000-3-12 defines: a) Requirements and emission limits for equipment; b) Methods for type tests and simulations. Tests according to this International Standard are type tests of complete pieces of equipment. Conformity with this standard can also be determined by validated simulations. This second edition cancels and replaces the first edition published in 2004 and constitutes a technical revision. The significant technical changes with respect to the previous edition are: The replacement of the reference fundamental current I1 by the reference current Iref for the calculation of emission limits; A newly added table of current emission limits; A newly added annex (Annex A) to define test conditions for some types of equipment; Deletion of the former Annexes B (Approximate interpolation formulas) and D (Information on the PWHD factor). Retrieved 3/12/14 from IEC Webstore Note: Advanced Test Equipment Rentals can perform ISO17025 accredited

Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 15: Flickermeter functional and design specifications. This section of IEC 61000-4 gives a functional and design specification for flicker measuring apparatus intended to indicate the correct flicker perception level for all practical voltage fluctuation waveforms. Information is presented to enable such an instrument to be constructed. A method is given for the evaluation of flicker severity on the basis of the output of flickermeters complying with this standard. This section is based partly on work by the "Disturbances" Working Group of the International Union for Electroheat (UIE), partly on work of the IEEE, and partly on work within IEC itself. The flickermeter specifications in this section relate only to measurements of 230 V, 50 Hz inputs and 120 V, 60 Hz inputs; specifications for other voltages and other frequencies are under consideration. Flicker testing evaluates the importance of fluctuating light levels by mimicking human perception. Standard IEC 61000-4-15 summarizes the research that supports the IEC 61000-3-3 flicker standard and establishes a measurement method. A flicker meter: - Records voltage fluctuations. - Converts voltage changes to an estimate of light variation from an incandescent bulb. - Weights this estimate according to frequency to account for human perception. - Determines an instantaneous flicker perceptibility reading (Pinst). - Derives a short-term flicker indication (Pst) over a 10-min period. - Derives a long-term flicker indication (Plt) over a 2-h period. As a guide, the threshold of flicker perception at about 8 Hz for half the population is only 0.3% relative modulation. This means that accurate, high-resolution voltage measurement is a prerequisite to good flicker measurements. The range of threshold levels across a wide frequency up to about 15 Hz is collectively described by Pst = 1 or the threshold of