3-Phase Monitor with Adjustable Trip & Restart Delays
The Model 20AB-H 3-Phase Monitor provides essential protection for industrial systems. Its adjustable trip delay, ranging from 1-30 seconds, allows for precise response to detected anomalies, preventing premature shutdowns. The adjustable restart delay, from 1-500 seconds, facilitates controlled system re-engagement after a fault, optimizing operational continuity. This device comprehensively monitors critical conditions including phase loss, phase reversal, over/under voltage, and voltage unbalance, ensuring robust system integrity. With an operating voltage of 475-600 VAC and an auto-reset function, it minimizes manual intervention and reduces potential downtime. The unit's robust design, featuring a Noryl plastic enclosure, contributes to its reliability across diverse operating environments, from -20° to +140° F. It offers a utility-focused solution for maintaining consistent three-phase power integrity and safeguarding connected equipment.
Unv 3Ph Monitor
Specifications
| Reset Type | Auto Reset |
|---|---|
| Operating Voltage | 475-600 VAC |
| Power Consumption | 4.5W at 600V |
| Auto Ranges | No |
| Monitored Conditions | Phase Loss, Phase Reversal, Over/Under Voltage and Voltage Unbalance |
| Frequency | 50/60Hz |
| Type of Measurement | RMS |
| Under Voltage Trip | 90% ±1% (% of setpoint) |
| Under Voltage Reset | 93% ±1% (% of setpoint) |
| Over Voltage Trip | 110% ±1% (% of setpoint) |
| Over Voltage Reset | 107% ±1% (% of setpoint) |
| Voltage Unbalance Trip | 2-8%, adjustable (conforms to NEMA) |
| Voltage Unbalance Reset | Trip setting minus 0.7% |
| Trip Delay Time (Over, Under, & Unbalanced) | 1-30 sec., adjustable |
| Trip Delay Time (Single-Phasing Faults) | 1 sec., fixed |
| Trip Delay Time (Unbalance > 15%) | 1 sec., fixed |
| Restart Delay | 1-500 sec., adjustable |
| Manual Reset Input | 5V open circuit/500µA short circuit |
| Output Contacts | 1x N.C., 1x N.O. 7.5A at 240VAC resistive |
| Operating Temperature | -20° to +140° F |
| Humidity Tolerance | 0-97% w/o condensation |
| Terminal Torque | 3.5 in. lbs. maximum |
| Wire Type | Stranded or solid 14-26 AWG, 1/terminal |
| Enclosure Material | Noryl plastic |
| Mounting | DIN Rail or Surface Mount |
| Additional Options | /SG = Silver with Gold Flash Contacts |
| Warranty | 5-year Unconditional Warranty |
