3-Phase Monitor
The 2501D 3-Phase Monitor provides essential protection for industrial systems. It continuously monitors for critical conditions such as phase loss, phase reversal, undervoltage, and voltage unbalance, ensuring operational integrity. Featuring an automatic reset function, the unit minimizes downtime by restoring operation without manual intervention once fault conditions clear. Its heavy-duty DPDT output contacts are rated for demanding applications, supporting up to 10 amps at 28VDC/300VAC. Users can configure nominal AC voltages from 120V to 600V, with an unbalance adjustment range of 2 to 10% and a trip delay from 1 to 10 seconds. This precision allows for tailored system protection. The monitor operates reliably across a -4° to +131° F temperature range and is UL Listed, backed by a 5-year warranty.
3Ph Monitor
Specifications
| Monitored Conditions | Phase Loss or Reversal, Low Voltage or Voltage Unbalance |
|---|---|
| Reset Type | Automatic |
| Output Contacts | Heavy Duty DPDT |
| Operation | On correct voltage and phase sequence, the output relay will energize. A fault condition (under voltage, phase reversal, unbalance, or loss) will cause the output relay to de-energize. |
| Config: Model Suffix | -120, -208, -240, -380, -415, -480, -600 |
| Config: Nominal AC Voltage | 120, 208, 240, 380, 415, 480, 600 |
| Config: Adjustment Range | 84-114V, 146-198V, 168-229V, 266-361V, 290-394V, 336-456V, 420-570V |
| Frequency | 50/60Hz |
| Unbalance Adjustment Range | 2 to 10% per NEMA specifications |
| Trip Delay Adjustment Range | 1 to 10 seconds (1 second increments) |
| Power Consumption | 4.5W per phase |
| Repeat Accuracy | ±1% of full scale |
| Reset Time | 150ms nominal |
| Dead Band | 2% of full scale |
| Output Contact Rating | DPDT 10 amps at 28VDC/300VAC 50/60Hz; 5 amps at 480/600VAC 50/60Hz |
| Operating Temperature | -4° to +131° F |
| Humidity Tolerance | 0-97% without condensation |
| Enclosure Material | ABS plastic |
| Mounting | Surface |
| Agency Approval | UL Listed to U.S. and Canadian safety standards |
| Warranty | 5-year Unconditional Warranty |
