3-Phase Monitor with Adjustable Trip & Restart Delays
The 20AA-L 3-Phase Monitor provides essential protection for industrial equipment by continuously monitoring critical electrical parameters. This unit detects phase loss, phase reversal, over/under voltage, and voltage unbalance, safeguarding connected machinery from potential damage. Its auto-reset functionality minimizes operational interruptions, while clear LED indicators provide immediate status feedback. Operators can precisely adjust trip delay times within a 1 to 30-second range and configure restart delays from 1 to 500 seconds. This granular control allows for tailored system integration, accommodating specific process requirements and preventing nuisance tripping. The monitor's robust design, coupled with its comprehensive monitoring capabilities, contributes to enhanced system reliability and extended equipment lifespan. A 5-year unconditional warranty underscores its dependable performance in demanding industrial environments.
Unv 3Ph Monitor
Specifications
| Model Type | Auto Reset |
|---|---|
| Monitored Conditions | Phase Loss, Phase Reversal, Over/Under Voltage and Voltage Unbalance |
| Indicators | LED Status Indicators |
| Operating Voltage | 95-120 VAC |
| Power Consumption | 3.7W at 120V |
| Auto Ranges | No |
| 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 |
| Voltage Unbalance Conformance | 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 | 2x N.O. (Isolated) |
| Output Contact Rating | 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 |
| Dimension Tolerance | ±0.06 |
| Optional Feature | /SG = Silver with Gold Flash Contacts |
| Warranty | 5-year Unconditional Warranty |
