AS NZS IEC 60947.5.2:2015 pdf free

AS NZS IEC 60947.5.2:2015 pdf free.Low-voltage switchgear and controlgear
The measurement shall be made in the operating mode, including grounding conditions,producing the highest emission in the frequency range being investigated which is consistent with normal applications (see Clause 4).
Descriptions of the tests, test methods and set-ups are given in CISPR 11. The contents of this standard is not reproduced here, however modifications or additional information needed for the practical application of the tests are given in this standard.
Proximity devices which are intended to be powered by public mains supply, therefore within the scope of IEC 61000-3-2 and IEC 61000-3-3，regarding low-frequency emission shall also comply with the requirements of these standards.
The test is performed with the proximity switch connected to a test circuit shown in Figure 6.The target is placed in a position such that the switching element is in the ON-state. With rated operational voltage Ug; or with the minimum value of the rated operational voltage when it is given as a range, the load is adjusted to obtain the minimum operational current /m The time delay before availability and the duration of any false signal are measured by recording the signal across the load with an oscilloscope as the bounce-free “Switch” is closed.
Figure 7 shows typical oscillograms for a d.c. switching element. Figure 7a shows the oscillogram when the switching element is in ON-state and Figure 7b shows the oscillogram when the switching element is in OF F-state.
Independent (snap) action shall be checked at maximum and minimum operating load currents at both maximum and minimum rated operating voltages. Resistive loads of appropriate value shall be used for each of the four tests.
These tests shall be carried out by moving the target from a position where the switching element is in the OFF-state to a position where the switching element is in the ON-state and observing the output on an oscilloscope. The switching element function shall be substantially independent from the velocity of the target and the output shall switch between the ON and the OFF states without oscillating, or holding at any intermediate level.AS NZS IEC 60947.5.2 pdf free download.