The real goal is to help you choose a protective relay test set that matches your requirements and budget. Protective relay test sets are a significant investment, so there’s no point paying for features you’ll never use. But choosing an inexpensive unit that can’t meet your testing needs is a false economy.
You’ll either end up replacing it or having to use time-consuming and uncertain workarounds to carry out your tests. That’s why Megger offers such a wide range of options. Consider three-phase testing, for example. Most applications require three voltages and three currents, which is enough to simulate most three-phase systems.
But sometimes, a fourth voltage is needed to test, for example, the synchro-check function in complex relays. And for testing transformer differential protection, six currents are needed! Megger offers test sets to cover all these applications, including the SMRT46, which you can configure to supply four voltages and three currents or, alternatively, six currents.