worthwhile to use a common filter at the grid input instead of a filter for each inverter. Many manufacturers also offer special low leakage-current


filters for their inverters or summation filters for use at the grid input.


Four-conductor filter


An especially simple option is to use a four-conductor filter with a neutral conductor instead of a three-conductor filter. Most filters with a neutral conductor have smaller leakage currents because many capacitors are connected between the phase conductors and the neutral conductor. In this way, most of the leakage current returns through the neutral conductor. Because the neutral conductor is measured by the RCD in the same way as the phase conductors, the device does not trip because the sum of the currents is equal.


LASER


TRIANGULATION SENSORS


“Machine downtime can be prevented – with knowledge about leakage currents and targeted countermeasures to ensure efficient yet safe operation.”


Herbert Blum, Product Manager EMC, SCHURTER AG


If a filter does not have sufficient attenuation, it can be combined with an additional power-line choke. This reduces the current’s ripple factor along with harmonics and thus provides for smaller leakage currents SChuRTeR is a leading partner for passive


electromechanical components (fuses, circuit breakers, connectors, eMC filters and input systems), aiming to provide safe, clean power and make the interface between human and machine easier. The company targets the electronic segments of IT/telecom, aerospace, medical, instrumentation as well as the industrial. ●


Enter 33A or ✔ at www.engineerlive.com/ede


Herbert Blum, Product Manager EMC, SCHURTER AG, Lucerne, Switzerland. www.schurter.com


Circle 33 or ✔ at www.engineerlive.com/ede www.micro-epsilon.com


MICRO-EPSILON | 94496 Ortenburg / Germany Tel. +49 85 42/168-0 | info@micro-epsilon.com


 Largest selection worldwide  Measuring ranges 2mm to 1000mm  Models with integrated controller  From low-cost models up to the highest precision  Advanced Real Time Surface Compensation A-RTSC High-end series optoNCDT 2300


 Extreme dynamic 50kHz laser displacement sensor


optoNCDT 1700BL


 Blue violet laser diode (405nm) for improved accuracy on glowing metals and organic materials


NEW NEW


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60