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NTFM 8131 A, ISN for 2 unshielded Unsymmetrical lines, Acc CISPR 32The "Impedance Stabilisation Network", also known as T-LISN, are used to measure the asymmetrical interference voltage on symmetrical data or telecommunication lines. Since 2002 the T-LISN is used for measurements of the asymmetrical disturbance voltage according to EN 55015 (electrical lighting equipment). Furthermore, it can be used for measurements according to CISPR 32 and CISPR 15. In contrast to the widely used T-LISN the NTFM 8131 A was designed to withstand 400 V AC at maximum currents of 3 A.
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