Model 258BM-400 3-Phase Monitor
258BM-240VAC-400
The Model 258BM-400 3-Phase Monitor offers essential protection for industrial applications. This device detects critical conditions such as phase loss, low voltage, and phase reversal, safeguarding connected equipment. Operating at 208/240VAC nominal with a 400Hz frequency, it provides reliable monitoring. Its 50ms drop out response time ensures prompt action upon fault detection. With a repeat accuracy of ± 0.1% of set point, consistent performance is maintained. The unit's robust design includes an ABS plastic cover and a wide operating temperature range of -20° to +131° F, ensuring durability in diverse environments. This monitor is a practical solution for maintaining system integrity.
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Specifications
| Reset Type | MANUAL 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 |
FAQs
What specific electrical conditions does the Model 258BM-400 monitor for?
The Model 258BM-400 detects phase loss, low voltage, and phase reversal to protect connected equipment.
What are the operating voltage and frequency specifications for this 3-phase monitor?
This monitor operates at a nominal AC voltage of 208/240VAC (phase to phase) with an adjustment range of 160-240VAC and a frequency of 400Hz.
What is the expected operational lifespan of the relay contacts in the Model 258BM-400?
The relay contacts have an expected mechanical life of 10 million operations and an electrical life of 100,000 operations at rated load.
