9 Electro-Magnetic Compatibility Issue A1
MICROMASTER 410 Operating Instructions
70 6SE6400-5EA00-0BP0
9.1.3 EMC Directive Compliance with Harmonics Regulations
From 1st January 2001 all electrical apparatus covered by the EMC Direc tive will
have to comply with EN 61000-3-2 "Limits for harmonic current em issions
(equipment input ≤ 16 A per phase)".
All Siemens variable speed drives of the MICROMASTER, MIDIMASTER,
MICROMASTER Eco and COMBIMASTER ranges, which are classified as
"Professional Equipment" within the terms of the standard, fulf ill the requirements
of the standard.
Special considerations for 250 W to 550 W drives with 230 V 1ac mains supplies
when used in non-industrial applications
Units in this voltage and power range will be supplied with the fol lowing warning:
”This equipment requires supply authority acceptance for connectio n to the public
supply network”. Please refer to EN 61000-3-12 sections 5.3 and 6.4 f or further
information. Units connected to Industrial Networks1 do not require connect ion
approval (see EN 61800-3, section 6.1.2.2).
The harmonic current emissions from these products are described in th e table
below:
Rating Typical Harmonic
Current (A) Typical Harmonic
Current (%) Typical Voltage
Distortion
Distribution Transformer
Rating
10kVA 100kVA 1MVA
3rd 5th 7th 9th 11th 3rd 5th 7th 9th 11th THD (%) THD (%) THD (%)
250W 230V 1ac 2.40 1.70 0.95 0.40 0.20 83 59 33 14 7 0.67 0.067 0.0067
370W 230V 1ac 3.50 2.50 1.40 0.60 0.25 85 61 34 15 6 0.97 0.097 0.0097
550W 230V 1ac 4.60 3.30 1.80 0.70 0.40 87 62 34 13 8 1.27 0.127 0.0127
The allowed harmonic currents for “professional equipment” with an input power
> 1 kW are not yet defined. Therefore, any electrical apparatus conta ining the
above drives which has an input power > 1 kW will not requir e connection
approval.
Alternatively, the necessity to apply for connection approval can be a voided by
fitting the input chokes recommended in the technical catalogues (exc ept 550 W
230 V 1ac units).
1 Industrial Networks are defined as those which do not supply buildings used for domestic purposes.