Certificate Of Compliance

HBCS Report # EMC_12003 Page 16 of 36
3. Harmonics Current Emissions
Test
Requirement(s):
EN 61000-3-2:2001 Test Engineer(s): None
Test Results: None Test Date(s): None
Test Procedures:
Switch-mode power supplies can draw high harmonic currents from the AC mains, which can cause a
variety of undesirable effects in the ac power distribution system. The end result for electronic products
connected to the AC mains can be improper operation, over-stressed ac input components and product
failure. The power distribution system must bear the burden of excessive neutral currents that over-
stress neutral wiring and inefficient power transmission to the loads connected to the system.
This test measures the harmonic currents injected into the AC mains by the EUT. It is applicable to
electrical and electronic equipment having an input current up to and including 16A per phase, and
intended to be connected to public low-voltage distribution systems of between 220 V and 250 V at 50
Hz line to neutral.
The test is conducted using frequency domain instrumentation as described in EN 61000-3-2 Annex B.
The amplitude of each specific harmonic is measured.
While the measurements are being made, the test voltage (U) at the terminals of the equipment
under test, when operated according to annex C, shall meet the following requirements.
The test voltage (U) shall be the rated voltage of the equipment. In the case of a voltage range, the
test voltage shall be 230 V for single-phase supplies. The test voltage shall be maintained within +2.0%
and the frequency within +0.5% of the nominal value.
The harmonic ratios of the test voltage (U) shall not exceed the following values with the EUT
connected as in normal operation:
0,9% for harmonic of order 3;
0,4% for harmonic of order 5;
0,3% for harmonic of order 7;
0,2% for harmonic of order 9;
0,2% for even harmonics of order from 2 to 10;
0,1% for harmonics of order 11 to 40;