Model 258B-400 3-Phase Monitor
The Model 258B-400 3-Phase Monitor offers essential protection for industrial applications. Designed for 208/240VAC systems with a 400Hz frequency, this device safeguards equipment against critical power anomalies. Its capabilities include detecting phase loss, low voltage, and phase reversal, ensuring operational continuity and preventing costly damage. The monitor features an AUTO Reset type, simplifying system recovery processes. With a robust design, including an ABS plastic cover and a wide operating temperature range of -20° to +131° F, it maintains consistent performance in demanding environments. Output contacts are SPDT 10 amps at 240VAC resistive, providing reliable control for connected systems. The unit's compact dimensions and 8-pin socket mounting facilitate straightforward integration into existing setups. A five-year unconditional warranty further underscores its reliability and long-term value. This monitor is a practical solution for maintaining system integrity and minimizing downtime.
3Ph Pwr Mon
Specifications
| Reset Type | AUTO Reset |
|---|---|
| Nominal AC voltage (phase to phase) | 208/240VAC |
| Case Color | Red |
| Adjustment range | 160-240VAC |
| Frequency | 400Hz |
| Power consumption | 2.4W |
| Protection Feature | Detects phase loss, low voltage, phase reversal |
| Warranty | Five year unconditional warranty |
| Transient protection | 2500VAC for 10ms |
| Repeat accuracy | ± 0.1% of set point (fixed conditions) |
| Response time | 50ms drop out |
| Dead band | Approx. 2% |
| Output contacts | SPDT 10 amps at 240VAC resistive |
| Expected relay life (Mechanical) | 10 million operations |
| Expected relay life (Electrical) | 100,000 operations at rated load |
| Operating temperature | -20° to +131° F |
| Humidity tolerance | 0-97% w/o condensation |
| Enclosure material | ABS plastic cover |
| Mounting | 8-pin socket (**sold separately) |
| Agency approvals | UL Recognized* and CSA Certified |
