Instructions for use:

The Schwarzbeck ISN-50561-3 is a measurement network that provides defined impedance at high frequencies across the power feed at the point of measurement of the terminal voltage, it also provides isolation of the circuit under test from the ambient noise on the power lines. The device also provides a defined coupling path between EuT and AE.

Important! Connect the ISN 50561-3 to protecting earth BEFORE applying any voltage to it! For this purpose, you can use the screw terminals at the front panel and the aluminum brackets at the rear side of the device.

Due to high capacities leakage, currents can occur. Thus it is not possible to use a residual current operated circuit breaker. It is recommended to use an isolating transformer. The supply voltage has to be applied at the back panel of the device by using the Schuko connector.

Important! The operator has to make sure that the maximum current is limited to 16 A at the supply side. There is no fuse built into ISN 50561-3 to protect the device under test!

The equipment under test (EuT) and the associated equipment (AE) have to be connected to the 4 mm safety laboratory jacks at the front panel. The maximum current that can be drawn of EuT and AE is 16 A in sum. The maximum voltage that can be applied is 250 VAC. The input for the power supply is located at the back panel and provides a hard-wired connection cable with a Schuko plug. One of the coaxial RF outputs has to be connected to the EMI measurement receiver using a BNC coaxial cable. The path that is actually not measured must be terminated with 50 Ω.