RTL /RTLX line inductor for harmonic filtering The problem Frequency converters, drives, softstarters, and other non-linear loads generate harmonics and commutation spikes in the electrical system. The harmonics and spikes are caused by the non linear power consumption of the diode bridge at the input of such loads. These distortions cause several problems in an electrical installation: Problems caused by harmonics: - Overheating of electrical cables and power transformers - Voltage drop in cables - Damage of capacitor banks Problems caused by commutation spikes: - Malfunctioning of PLC’s, computers, electronic and computer based equipment - Damage of the capacitors in the frequency converter, causing premature fall out Note that commutation spikes are often invisible in measurements due to their short duration. Problems due to commutation spikes are therefore often confused with harmonic problems, however only filters that do eliminate the commutation spikes will provide a good solution. The solution POLYLUX line inductors, series RTL and RTLX filter the harmonics to a low level (approx. 50% reduction of 5th harmonic, 80% reduction of 7th harmonic). Additionally, the RTL and RTLX line inductors completely eliminate the commutation spikes. Line inductors are the easiest and most cost effective devices for solving due to harmonics and commutation spikes caused by frequency converters, drives and soft starters. RTL Cast Resin, suitable for: - humid and corrosive environments - applications with elevated vibration levels RTL/RTLX line inductors POLYLUX, S.L. RTLX Impregnated page 1 Filtering effect Input current waveform of frequency converter without line inductor Input current waveform of frequency converter with line inductor Harmonic current spectrum frequency converter without line inductor Harmonic current spectrum frequency converter with line inductor Voltage waveform at input of frequency converter without line inductor RTL/RTLX line inductors Voltage waveform at input of frequency converter with line inductor POLYLUX, S.L. page 2 How to use The line inductors should be installed at the input of the frequency converter. One line inductor shall be used for each frequency converter, it is not possible to use one inductor for several frequency converters. The line inductor is selected according to the rating of the connected motor (not the rating of the frequency converter), see table. It is important not to oversize the line inductor. RTL / RTLX line inductor frequency converter M other loads M motor The advantages -Avoid malfunctioning of PLC’s, computers, electronic devices -Avoid voltage drop in the cables, improve your P.F. -Avoid overload of cables and transformers -Avoid failure in frequency converters -Avoid damage of capacitor banks -Energy saving thanks to reduced Irms -Filtering of harmonics at the source, reducing the harmonics in the whole installation RTL/RTLX line inductors POLYLUX, S.L. page 3 The products RTL RTL2,5 RTL4 RTL5 RTL6,3 RTL8 RTL10 RTL12,5 RTL16 RTL20 RTL25 RTL31,5 RTL40 RTL50 RTL63 RTL80 RTL100 RTL125 Reference RTLX RTLX2,5 RTLX4 RTLX5 RTLX6,3 RTLX8 RTLX10 RTLX12,5 RTLX16 RTLX20 RTLX25 RTLX31,5 RTLX40 RTLX50 RTLX63 RTLX80 RTLX100 RTLX125 RTLX160 RTLX200 RTLX250 RTLX315 RTLX400 RTLX500 RTLX630 Technical characteristics Line voltage: Line frequency: Isolation: Windings: Test voltage: Voltage drop: Thermal overload: Protection degree: Ambient temperature: Temperature rise: Standards: Includes: In (A) 2,5 4 5 6,3 8 10 12,5 16 20 25 31,5 40 50 63 80 100 125 160 200 250 315 400 500 630 L (mH) 11,762 7,351 5,881 4,667 3,676 2,941 2,352 1,838 1,470 1,176 0,933 0,735 0,588 0,467 0,368 0,294 0,235 0,184 0,147 0,118 0,093 0,074 0,059 0,047 For motor rating (kW) (hp) 0,75 1 1,1 1,5 1,5 2 2,2 3 3 4 4 5,5 5,5 7,5 6,5 8,8 7,5 10 11 15 15 20 18,5 25 22 30 30 40 37 50 45 60 55 75 75 100 90 125 110 - 132 150 - 180 150 - 160 205 - 220 185 - 200 250 - 270 220 - 250 300 - 340 280 - 315 405 - 415 380 - 460V 50 - 60 Hz Class F Copper, Class HC-200ºC 3 kV (1 min, 50 Hz) 4% at 400V, 50Hz and nominal current 5% RTL: IP-20, RTLX: IP-00 40ºC <90ºC IEC/EN 60289, CE Bimetal thermal protection POLYLUX S.L. C/ Boters 3B - Parc Tecnològic del Vallès 08290 Cerdanyola del Vallés, (Barcelona) Spain tel: +34-93-6926565 fax: +34-93-5809603 e-mail: polylux@polylux.com http://www.polylux.com RTL/RTLX line inductors POLYLUX, S.L. page 4