IEC 61000-4-14 pdf download Electromagnetic compatibility (EMC) – Part 4-14: Testing and measurement techniques – Voltage fluctuation immunity test for equipment with input current not exceeding 16 A per phase
– performance criteria used and defined in the technical specifications;
– description of the test set-up.
If the actual operating signal sources are not available to the EUT, they may be simulated.
For each test, any degradation of performance shall be recorded. The monitoring equipment should be capable of displaying the status of the operational mode of the EUT during and after the tests.
After each group of tests, a full functional check shall be performed.
8.1 Climatic conditions Unless otherwise specified by the committee responsible for the generic or product standard, the climatic conditions in the laboratory shall be within any limits specified for the operation of the EUT and the test equipment by their respective manufacturers. Tests shall not be performed if the relative humidity is so high as to cause condensation on the EUT or the test equipment. NOTE Where it is considered that there is sufficient evidence to demonstrate that the effects of the phenomenon covered by this standard are influenced by climatic conditions, this should be brought to the attention of the committee responsible for this standard.
8.2 Execution of the test The EUT shall be tested for each selected combination of test level and duration with a series of three sequences of voltage fluctuations, with intervals of two times 60 s minimum between the voltage fluctuation sequences (see figure 2).
Each representative mode of operation shall be tested. The test duration shall be determined by the product committee. In the case of a three-phase apparatus, all three phases shall be tested at the same time. The voltage steps are made phase by phase at the same phase angle, ϕ , and not simultaneously on the three phases.
9 Evaluation of test results The test results shall be classified in terms of the loss of function or degradation of performance of the equipment under test, relative to a performance level defined by its manufacturer or the requestor of the test, or agreed between the manufacturer and the purchaser of the product. The recommended classification is as follows:
a) normal performance within limits specified by the manufacturer, requestor or purchaser;
b) temporary loss of function or degradation of performance which ceases after the disturbance ceases, and from which the equipment under test recovers its normal performance, without operator intervention;
c) temporary loss of function or degradation of performance, the correction of which requires operator intervention; d) loss of function or degradation of performance which is not recoverable, owing to damage to hardware or software, or loss of data.