CEM DT-901 Phase Rotation Indicator. This handheld, battery-operated instrument is used to detect the rotary field of three-phase systems.
Nominal Voltage: 40V to 690V AC.
Frequency Range: 15 to 400Hz.
Electrical Safety: IEC61010/EN61010; IEC61557-7/EN61557-7, CAT III 600V.
Power Supply: The unit is powered by the system under test, so no battery is required