A 3-phase power meter, also called a three-phase power meter, can measure a variety of electrical parameters, from current and voltage to resistance, continuity and beyond. A 3-contractors to assess everything from live wires and circuit breakers to electrical panels and power transformers. In addition to being referred to as a three-phase power meter, a 3-phase power meter goes by many different names, including but not limited to clamp meter, current clamp, digital multimeter, electrical tester, oscilloscope, circuit tester, ground checker, voltage detector, milliohm meter, phase rotation meter and power analyzer.