W o r k i n g O n B e t t e r S o l u t i o n s1 Chroma T&M BU Product & Marketing Div. ~ 周晏加 ~ Limits for harmonic current emissions Limits for harmonic current emissions (equipment input current <=16A per phase)

W o r k i n g O n B e t t e r S o l u t i o n s2 Background and History Test instruments Classification of equipment Test methods Test instruments Limits Test conditions OUTLINE

W o r k i n g O n B e t t e r S o l u t i o n s3 Background Too much Harmonic Current pollute Main power

W o r k i n g O n B e t t e r S o l u t i o n s4 * IEC ( ~1/1/2001) History * IEC :1995 (1/1/2001 ~1/1/2004) * IEC A14 (1/1/2001 ~ ) * GB 中國 3C 認證項目 (1/5/2002 開始, 1/5/2003 強制 ) (1/5/2002 開始, 1/5/2003 強制 )

W o r k i n g O n B e t t e r S o l u t i o n s5 Chroma Solution for IEC

W o r k i n g O n B e t t e r S o l u t i o n s6 Voltage accuracy : 2.0 % or better Frequency accuracy : 0.5 % or better Power Capacity : 230V x 16A = 3680VA Voltage Harmonic distortion (With EUT connected): 0.9 % for harmonic of order % for harmonic of order % for harmonic of order % for harmonic of order % for even harmonic of order from 2 to % for harmonic of order 11 to 40 AC Power Requirements AC Power Requirements

W o r k i n g O n B e t t e r S o l u t i o n s7 Zs and Zm are not specified. But have to be low to suit the test requirements. AC source, Meter and Cable must good. G Zs Zm EUT AC source Meter Equipment AC Power Requirements AC Power Requirements

W o r k i n g O n B e t t e r S o l u t i o n s8 Chroma Programmable AC Source Spec. : Voltage accuracy : 0.2 % %F.S < 2% Frequency accuracy : 0.15 % < 0.5% Power Capacity : For different EUT For each test, Check Voltage Harmonic Distortion Model 6560 (6KVA), Model (4KVA) Chroma Programmable AC Source

W o r k i n g O n B e t t e r S o l u t i o n s9 Total error in steady-state mode : Shall not exceed 5% of permissible limit or 0.2 % of rated current of EUT Maximum relative deviation between f1 and synchronise frequency : Equal to or lower than 0.03 % of f1 Attenuation of anti-aliasing filter : 50 dB at least Chroma Power Analyzer 6630

W o r k i n g O n B e t t e r S o l u t i o n s10 Balance three-phase equipment Y N Equipment having special wave shape and P <= 600 W Y N Lighting equipment Y N Portable tools Y N N Class B *Motor driven Class C * Input power > 25W Class D * Input power > 75W Class A N Y IEC IEC Classification

W o r k i n g O n B e t t e r S o l u t i o n s11 Classification A 0.35

W o r k i n g O n B e t t e r S o l u t i o n s12 Classification D 0.35

W o r k i n g O n B e t t e r S o l u t i o n s13 Class A Harmonic order n Maximum permissible harmonic current A Odd harmonics Even harmonics <= n <= <= n <= x 15/n x 8/n

W o r k i n g O n B e t t e r S o l u t i o n s14 Class B, C Class B : 1.5 times of class A limits Class C : Harmonic order n Maximum permissible harmonic current expressed as percentage of the input current at the fundamental frequency % Odd harmonics only <= n <= ‧ * * is the circuit power factor

W o r k i n g O n B e t t e r S o l u t i o n s15 Class D Harmonic order n Maximum permissible harmonic current per watt mA/W Odd harmonics only <= n <= /n Maximum perm- issible harmonic current (A) See class A

W o r k i n g O n B e t t e r S o l u t i o n s16 Transitory state Measure every 16 cycles of fundamental frequency for 2.5 mins Smoothing the harmonic components by LPF having time constant of 1.5S +- 10% i i 16 cycles 2.5 min Smoothing

W o r k i n g O n B e t t e r S o l u t i o n s17 Transitory state For harmonic order 3-19 and 2-10, if 1. T<10% of observation period (15 sec) and 2. none of the waveform over 1.5 times limits It will be considered as pass the limits 2.5 min (150s) i Limit 1.5 x Limit T

W o r k i n g O n B e t t e r S o l u t i o n s18 Amendment 14 1.Classification: Only PC, PC monitor or TV receiver are class D. 1.Measuring time 2.Transitory state