Model B258B 3-Phase Monitor
The Model B258B 3-Phase Monitor offers essential protection for industrial systems. Designed for 120VAC, 60Hz applications, it safeguards against phase loss, low voltage, and phase reversal. Its AUTO Reset functionality minimizes downtime, ensuring continuous operation. With SPDT 10 amp output contacts, it integrates effectively into various control circuits. The unit maintains operational integrity across a -20° to +131° F temperature range and 0-97% humidity without condensation. A repeat accuracy of ± 0.1% of set point ensures precise monitoring. Its robust design includes 2500VAC transient protection for 10ms and an expected mechanical relay life of 10 million operations. This monitor provides reliable system oversight, supported by UL Recognized and CSA Certified approvals, making it a dependable component for critical three-phase applications.
3Ph Pm Factory Set
Specifications
| Reset Type | AUTO Reset |
|---|---|
| Nominal AC voltage (phase to phase) | 120VAC |
| Case Color | Gray |
| Adjustment range | 85-120VAC |
| Frequency | 60Hz |
| Power consumption | 1.4W |
| 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 |
