Engineered and Built in the USA
20VB
Categories: 3-Phase-Monitors, 20VB-SeriesA microcontroller-based universal 3-phase voltage band monitor for protecting 3-phase motors of any size from abnormal power conditions. The Model 20VB can detect under voltage, over voltage, voltage unbalance, reverse phase, and single-phasing even when regenerated voltage is present. Status of the 3-phase system is indicated by LEDs. The Model 20VB is UL Recognized in the U.S. and Canada.
Relay operation is fail-safe, i.e. the SPDT output contacts drop out when a fault condition or loss of power occurs. Under and over voltage trip points are both adjustable. The under voltage adjustment has two scales, 185-240VAC and 370-480VAC. The over voltage adjustment also has two scales, 208-264VAC and 416-528VAC. The Model 20VB will auto-range to the appropriate scale. A trip delay adjustment for preventing nuisance tripping during power fluctuations and a restart delay adjustment for preventing short cycling in compressor applications have also been provided. Voltage unbalance trip point is fixed at 6%.
The Model 20VB does not require a neutral connection and can be used on either Wye or Delta systems. Operating power for the Model 20VB is drawn from phases A and B.
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Additional Information
| Automatic Reset | Yes |
|---|---|
| Certifications | UL (C and US) |
| Contacts | SPDT |
| Manual Reset | No |
| Mount | DIN, Surface Mount |
| Phase Sensing | Phase Reversal,Phase Loss,Phase Unbalance |
| Trip Delay | Yes |
| Trip Restart | Yes |
| Voltage Sensing | Under Voltage Protection, Over Voltage Protection |
| Voltage Range | 190-480VAC |
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