Emerson E300 Series Design Manual page 27

Advanced elevator drive / dedicated elevator variable speed ac drive for induction and permanent magnet motors
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2.13.1
Emission - EN 12015
The standard sets limits in the following categories:
1. Radiated emission from the enclosure
This covers the frequency range 30 MHz to 1000 MHz.
The limits are the same as for the generic standard EN 61000-6-4 and are unchanged from the 1998 version.
2. Conducted emission from the AC mains port(s)
This covers the frequency range 0.15 MHz to 30 MHz.
The limits are the same as for the generic standard EN 61000-6-4 and are unchanged from the 1998 version.
3. Conducted emission from the power port(s) (motor port etc).
This covers the frequency range 0.15 MHz to 30 MHz.
These are new limits, which apply unless the motor cable length does not exceed 2 m or it is screened.
4. Impulse noise
This is a special requirement for impulsive conducted emission.
The limits are the same as for the 1998 version.
5. Voltage fluctuations
This covers fluctuations, which are variations in the supply voltage which result in lighting flicker.
These are new limits. They are based on the standard EN 61000-3-11.
6. Mains current harmonics
This covers harmonics up to order 40.
These are new limits. They are based on standard IEC 61000-3-4.
Conformity of the Control Techniques drive products with EN 12015
The drives conform to the standard for Power Drives Systems, EN 61800-3, and the generic standard for industrial environments EN 61000-6-4. In
many respects this also covers the requirements of EN 12015.
Mains conducted emission
Generally the standard optional external filter must be used.
The motor cable length is set by the filter capability, on the assumption that the highest available switching frequency is in use. If longer lengths are
required this can usually be achieved by reducing the switching frequency, see the appropriate EMC data sheet for further information.
Where the lift system has a rated input current exceeding 100 A, and a dedicated supply transformer, higher emission levels are permitted and then
only the built-in filter is required.
Please note that the standard test method requires the use of a mains supply cable 1 m long, this being the cable which connects the system under
test to the LISN (line impedance stabilization network). This requirement might be inconvenient and appear to be unrealistic in some cases. However
it is important to adhere to this recommendation to ensure a valid and comparable test result.
Output conducted emission
The cable must be screened and the screen must be correctly bonded in accordance with the EMC (Electromagnetic compatibility) section of this
Design Guide or the EMC data sheet for the product, unless the motor cable length is less than or equal to 2 m in length.
Impulse noise
The drive does not generate impulse noise. Care is required to ensure that associated power contactors do not generate impulse noise.
Voltage fluctuations
The drive does not in itself cause significant voltage fluctuations or flicker. The control system must be designed so as not to cause rapid changes in
motor power which could result in flicker. Generally the requirements for passenger comfort ensure that this is the case.
Mains current harmonics
The mains current harmonics for the complete lift system will be the vector sums of the harmonic currents for all of the individual electrical loads in the
system. Usually the main lift drive(s) will dominate the electrical load, and it will be sufficient to ensure that these meet the harmonic requirements.
Where electronic drives are also used for ancillary functions such as door opening, ventilation etc., it may be necessary to ensure that their harmonic
contributions are not excessive, although generally their power ratings will be too small to be significant. It is important that test conditions should be
realistic and/or calculations done correctly, in order for harmonic emission from small drives to be correctly assessed. Please see the note below on
test conditions for harmonic testing.
The information in section 2.11 AC input line reactors on page 23, shows the measures required for drives rated at 2.2 kW upwards, in order to meet
the harmonics requirements. For harmonic data related to the smaller drives which might be used for auxiliary functions, please refer to the relevant
EMC data sheet.
Input chokes must be provided in order to maintain the harmonics below the required levels. Table 2-15 gives the choke data. Note that the correct
value of choke depends upon the maximum input power for which the particular lift controller is designed, and not necessarily on the drive model
number or rating. The figure for input power in Table 2-15 is based on the efficiency of a typical standard Eff2 induction motor. For a given application,
it is important that the actual maximum input power should be measured or estimated and the necessary choke value calculated in inverse proportion
to the power.
27
E300 Design Guide
Issue Number: 1

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