IEC 61000-4-5 and ANSI C62.41 describe a combination Wave or Hybrid generator with defined open AND short circuit waveforms. The Combination Wave is used to test AC and DC power systems. Safety is paramount with surge impulses. The PIM 100 High Voltage connections are all linked into the System Safety Concept which prevents high voltage plugs or cables from exposing operators to potentially lethal voltages. This concept is extended to Coupling/Decoupling Networks (CDNs) connected to the PIM 100 output. PIM 100 as part of the PSURGE 8000 Surge Platform System can be used together with Coupling/Decoupling Networks (CDNs) for superimposition of the impulse on AC and DC power lines. Single and three phase CDNs have multiplexed inputs, allowing up to 3 impulse modules to be connected. A full suite of test impulses can then be performed completely automatically and without the need to power down and reconnect the EUT.