On INS-S420, the EUT line input terminals are the three terminals L, N, and PE. Is it possible to test application to a 3-phase 200V line without using a superimposition unit, such as by routing one of the three-phase lines externally?

On INS-S420, the EUT line input terminals are the three terminals L, N, and PE. Is it possible to test application to a 3-phase 200V line without using a superimposition unit, such as by routing one of the three-phase lines externally?

If one of the three-phase lines is routed externally and the voltage between the phases being input above is AC240V or less, INS-S420 will not fail.
However, there is a possibility that the test results may be affected depending on whether one of the three phases is routed externally or a three-phase superimposition unit is used,
so please conduct the test at the customer's own responsibility.