Phase Angle Meter (646)
TESCO’s Phase Angle Meter (Cat. No. 646) is a self-contained, portable instrument designed for fast, accurate checks of relay and instrument connections. It displays the angular relationship between one voltage and one current—ideal for power factor testing, switchgear verification, and generator synchronization.
Key Features
- Input-powered—no batteries required
- Rugged, field-ready construction
- Large, panel-mounted analog display viewable from a distance
- Easily detects changing phase angle relationships in real time
- Custom input options available for unique test configurations
Description
Quickly verify phase relationships in relay, switchgear, and metering setups—no auxiliary power required.
The 646 is also widely used for evaluating phase angles in polyphase watthour meter installations, helping technicians verify power factor accuracy across each phase. Its analog dial provides immediate visual feedback, making it easy to observe and interpret phase behavior during live testing.
Specifications
| Unit | Details |
|---|---|
| Voltage Range | 15-480 VAC |
| Current Taps | 1-10 Amps |
| Display | Analog phase angle dial (degrees) |
| Input Power | Supplied from test signals (no batteries) |
| Construction | Durable enclosure for field and shop use |
| Inputs | Custom configurations available upon request |
