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Archive >  July 2013 Issue >  New Products > 

Enhanced DC LISN from Teseq
High current impedance stabilization network.
Edison, NJ — Teseq now offers a high current impedance stabilization network (LISN) for measuring conducted emissions disturbances on DC power ports of photovoltaic (PV) inverters. The DC-LISN-M2-100, which conforms to the latest requirements of the international standard working group MT GCPC (grid connected power conditioners), can run at a maximum operating current of 150A for 30 minutes, or continuously at 100A.

This enhanced unit offers a maximum operating voltage of 1,500V and measures disturbances over a frequency range of 150kHz to 30MHz. The unit provides improved performance, testing with impedance levels of 150Ω in common-mode and 100Ω in differential mode.

Research results have shown that a typical artificial mains V-network as described in CISPR 16-1-2 cannot be used for the assessment of unsymmetrical disturbances of a photovoltaic inverter's DC port. CDNs based on IEC/EN 61000-4-6 are typically not specified for high common-mode currents or differential-mode disturbances. And, depending on the switch position, the new LISN works as V, Y or Delta shape as well as offers a defined termination impedance from 1kHz to 30MHz.

The front panel of the DC-LISN-M2-100 includes an earth plane connection bar, an EUT port, a switch for selecting the LISN type, as well as a receiver port.

The back of the unit has a power input with selectable ranges of 230V or 110V for the unit's two cooling fans (also located on the back panel), an EUT power input for a PV generator/simulator and a protective earth connection.

Contact: Teseq Inc., 52 Mayfield Avenue, Edison, NJ 08837 732-417-0501 fax: 732-417-0511 E-mail: Web:

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