3-Phase Monitor
The MODEL 252 B252B 3-Phase Monitor provides essential protection for industrial systems. This device accurately detects critical power anomalies including phase loss, low voltage, and phase reversal, safeguarding connected equipment from potential damage. With a rapid response time of 0.05 seconds, it ensures immediate system intervention. Its robust design allows operation across a wide temperature range, from -20° to 131° F, and maintains functionality with 97% humidity without condensation. The monitor features dual output contacts, one SPDT and one SPST (N.O.), rated at 5A at 115VAC resistive, offering reliable control integration. Power consumption is minimal at 1.5W, contributing to operational efficiency. This unit is engineered for consistent performance and long-term reliability in demanding industrial environments, ensuring continuous monitoring and protection for critical three-phase applications.
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Specifications
| Nominal AC Voltage | 480VAC |
|---|---|
| Adjustment Range | 380-480VAC |
| Frequency | 60Hz |
| Power Consumption | 1.5W |
| Transient Protection | 2500V for 10ms |
| Repeat Accuracy | 0.1% of set point (fixed conditions) |
| Response Time | 0.05 seconds |
| Reset Time | 0.05 seconds |
| Reset Type | Automatic |
| Dead Band | 2% |
| Output Contacts | 1 - SPDT & 1 - SPST (N.O.) |
| Contact Rating | 5A at 115VAC resistive |
| Expected Relay Life (Mechanical) | 10 million operations |
| Expected Relay Life (Electrical) | 100,000 at rated load |
| Operating Temperature | -20° to 131° F |
| Humidity Tolerance | 97% w/o condensation |
| Enclosure Material | ABS plastic |
| Mounting | 8-pin socket (*order separately) |
| Agency Approvals | UL Recognized (U.S. & Canadian) |
| Required Socket Part Number | 51X120 |
| Feature | Detects Phase Loss, Low Voltage and Phase Reversal |
