The Fluke 9040 Phase Rotation Indicator features high voltage capability for industrial applications, making it effective for measuring phase rotation in all areas where three-phase supplies are used to feed motors, drives, and electrical systems .

As a rotary field indicator, the 9040 provides clear indication of the three phases via an LCD display and shows phase rotation direction to determine correct connections. It allows rapid determination of phase sequence with a voltage range up to 700V and frequency range of 15-400 Hz, suitable for commercial and industrial applications .

The included test probes have a variable clamping range for safe contact, even in industrial sockets. The instrument has an IP40 rated housing and carries electrical safety ratings of EN 61010 and EN 61557-7, with overvoltage categories CAT III 600V and CAT IV 300V .

No batteries are required for operation, making the 9040 always ready for use when needed. Applications include verifying correct phase rotation before connecting motors, checking generator synchronization, and troubleshooting three-phase electrical systems .