Specifically designed to work with SVERKER 750 / 780 when testing three-phase relays.
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The PSS 750 handles both the current and voltage sources and single-phase or phase-phase testing can be selected. Together with the output-input switching the unit also contains a variable resistor that can be used together with the built-in capacitor in the Sverker 750.
The PSS 750 simplifies phase switching, selecting type of fault, phase reversing and gives a possibility to create a variable phase shift.