Certificate Of Compliance

HBCS Report # EMC_12003 Page 18 of 36
4. Voltage Fluctuations and Flicker
Test
Requirement(s):
EN 61000-3-3: 1995
(A1:2001)
Test Engineer(s): None
Test Results: None Test Date(s): None
Test Procedures:
The power quality of the AC mains can deteriorate due to voltage fluctuations caused by devices such as
electronic ballast’s and light dimmer switches. The phase-controlled ac input of these devices may
cause large rms current changes on the AC mains, which result in substantial rms voltage deviations. In
addition, the amplitude and frequency of these deviations can cause incandescent lamps to flicker,
which can be irritating to humans.
This test is conducted using frequency domain instrumentation as described in EN 61000-3-3 Section 4.
All types of voltage fluctuations are assessed at the supply terminals of the EUT by direct measurement
using a flickermeter, which complies with the specification given in IEC 868.
The test supply voltage (open-circuit voltage) shall be the rated voltage of the equipment. If a voltage
range is stipulated for the equipment, the test voltage shall be 230 V single-phase. These test voltage
shall be maintained within + 2% of the nominal value. The frequency shall be 50 Hz +0,5%.
The percentage total harmonic distortion of the supply voltage shall be less than 3%.
Fluctuations of the test supply voltage during a test may be neglected if the Pst value is less that 0,4.
This condition shall be verified before and after each test.