Testing of safety measures in electrical systems is intended to protect people from accidents with electrical power, and thus to ensure their freedom from bodily harm. Property damage caused by electrical power should of course be prevented as well. And thus every electrical system should be checked with our test instruments before initial start-up, and at regular intervals thereafter, in order to assure the effectiveness of installed protective measures. With the help of our innovative products, all relevant measured quantities can be acquired which are decisive for system safety.