For measuring conducted emissions disturbances on dc-power ports of photovoltaic (PV) inverters, the DC-LISN-M2-100 line impedance stabilization network (LISN) from Teseq can run at a maximum operating current of 150 A for 30 min., or continuously at 100 A. The tester conforms to the latest requirements of the international standard working group MT GCPC (grid connected power conditioners), offering a maximum operating voltage of 1,500 V and measuring disturbances over a frequency range of 150 kHz to 30 MHz. 
Testing with impedance levels of 150 Ohms in common-mode and 100 Ohms in differential-mod, the $6,990 instrument can serve where a typical artificial mains V-network (as described in CISPR 16-1-2) cannot: for 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. Depending on the switch position, the new LISN works as V, Y, or Delta shape as well as offering a defined termination impedance from 1 kHz to 30 MHz.
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