IEEE 1560-2005 pdf download.IEEE Standard for Methods of Measurement of Radio-Frequency Power-Line Interference Filter in the Range of 100 Hz to 10 GHz IEEE Electromagnetic Compatibility Society.
The scope of this standard is to develop a standard method of measurement for evaluating the electromagnetic and radio frequency suppression capability of power-line filters in the frequency range of 100 Hz to 10 GHz. This will apply to electromagnetic interference/radio-frequency interference (EMI/RFI) filters in general, i.e, de, single-phase or polyphase systems rated for 600 V and below 1000 A. The method of measurement will describe general considerations, such as the method of standardizing source impedance for nonlinear loads, temperature rise, attenuation measurement, components, and or derating requirements when supplying nonsinusoidal load currents and operating in matched- or mismatched-impedance environments.
1.2 Purpose The purpose of this standard is to provide measurements that evaluate the performance of power-line interference filters in practical installations involving varying load and source impedances. These factors are not usually considered in design and performance verification testing of EMI/RFI filters. Both manufacturers and end users should benefit from this standard that defines the ranges and environment, expected effects, and test methods to verify filter attributes.
1.3 Application of test methods and use of this document Clause 10 describes filter performance measuring techniques. Although it might be desirable to characterize each production filter in accordance with all the measurement methods described, it is generally not economically feasible to do so. Usually, only first-design filters will be analyzed through multiple performance tests. These tests establish a performance baseline for that filter design. Subsequent production units of the same design may be tested using matched-impedance techniques to ensure that there is no significant deviation from the original due to component or assembly changes.
Case design and assembly testing may be required on a need basis to ensure control of radiated emissions from the filter at frequencies above 1 GHz. There are several methods for observing case integrity that do not employ RF testing to ensure proper case construction. These include the die penetration method.However, it is recommended that radiated field testing be performed at the installation site with the filter in its final configuration on a shielded enclosure for best results at frequencies above 1 GHz. Refer to IEEE Std 299M.1 Where it is not possible to perform the test with the filter in its final configuration, then reasonable screening or enclosures may be used.
Clause 10 is divided into eight test methods (see 10.1- 10.8), alphabetically coded in Table B.I. It is desirable to label all power-line filters in a similar manner in accordance with Annex B. The nameplate data may be derived from the different tests outlined in Clause 10. Annex F illustrates generic filter curves and points of interest such as the 3 dB point, 20 dB point, and the ratio calculations of the shape factor, which may be requested to be printed with the filter curves in the original baseline data.
1.3.1 Use of test methods Quality assurance tests
Quality assurance- No load (10 kHz to 1 GHz) (see 10.1)
Quality assurance- Loaded (10 kHz to 20 MHz) (see 10.2)
The quality assurance (QA) test follows traditional matched-impedance testing methods currently in practice by most manufacturers. The frequency ranges are selected based on reproducibility, QA control indicators,and reasonable performance frequencies where the filter might be operating under varying loads. Mismatched-impedance tests
RF characteristics mismatched impedance No load (100 kHz to 30 MHz) (see 10.3)
The mismatched-impedance subclause finds its origins in the tradition of CISPR 17. Using a set of mismatched source and load impedance, this low-cost performance indicator may be used when current injection techniques are not practical or cost-ffctive. For example, the 0.1 ohm and 100 ohm impedances used in the no-load test setup result in an apparent insertion loss without the filter of approximately 50 dB,limiting filter dynamic range testing to approximately 60 dB. It may be necessary to use pre- or postamplifiers if a larger dynamic range is desired.IEEE 1560 pdf download.