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Diagnostics Optimization CT MODBUS RTU Technical Data
32 Installation and System Design Guide
Issue Number: 1
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 refer to the EMC data
sheet.
Input chokes must be provided in order to maintain the harmonics below the required levels. 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.
Table 2-36 Emissions compliance
The limits in the table are based on the ratios of the specific harmonics to the rated fundamental current (In / I1 in clause 6.7.2 of EN 12015:2014).
2.13 AC input line reactors
AC input line reactors must be provided in order to maintain the harmonics below the required levels detailed in IEC 61000-3-12 (EN 12015). For a
given application, it is important the actual maximum input power is measured / estimated and the correct reactor value calculated in inverse
proportion to the power.
Where input line reactors are not required to meet IEC 61000-3-12 (EN 12015) line reactors may still be required due to power supply quality issues,
poor phase balance, severe disturbances etc.
2.13.1 Immunity - EN 12016:2013
The standard gives immunity requirements over a range of standard immunity test methods. Generally these correspond to the tests required by the
generic standards for the residential and industrial environments, EN 61000-6-1 and EN 61000-6-2. However there are more severe test levels
prescribed for safety circuits. In the tests for safety circuits, the drive is permitted to trip but the safety function must continue to operate.
The following table shows the status of the whole range of drives covered by this data sheet.
Table 2-37 Immunity compliance
* Suppression is not required to ensure safety, and is generally not required. Control Techniques recommends that the suppression be installed if the
lines connected to the port exceed 30 m in length, based on the requirements of EN 61000-6-2. See section 4.17.8 Surge immunity of control circuits
on page 121.
Item Limit (%) Typical (%)
Harmonic:
5 40 33.8
7 25 10.7
11 15 7
13 10 3.4
THD 48 36.6
PWHD 46 18.5
cosφ
0.9790
Distortion factor
0.9580
Power factor
0.9379
Test Status – drive functions Status – Safe Torque Off used in safety circuits
Electrostatic discharge Conform Electrostatic discharge Conform
Radio frequency electromagnetic field Conform Conform (the drive might trip but no loss of safety function)
Fast transients common mode – to signal
and power ports
Conform Conform
Surge: Signal and control lines Conform Conform (External suppression is required to prevent trip or damage)*
Power ports Conform Conform
Radio frequency common mode – to signal
and power ports
Conform Conform
Voltage dips Conform Conform
Voltage interruptions Conform Conform
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