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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | TimeMark |
| Manufacturer Product Number | B2638 |
| Description | Phase Monitor Relay; 3-Phase; 208/240V AC; 160...240V AC; 1C SPDT |
| Datasheet | Download Datasheet |
The TimeMark B2638 is a 3-phase monitor for 208/240 V AC, 60 Hz systems. It drops its output relay out on phase loss, phase reversal and undervoltage and resets once the fault clears.
Trip points: undervoltage 160-240 V AC. Adjustment: field adjustable. Trip delay: phase loss / reversal 0.05 s. Reset: automatic.
Output: 1C SPDT, 10 A at 240 V AC resistive. Mounting: surface mount. Indicator: Line voltage LEDs A, B, C; phase sequence LEDs ABC and CBA; TRIPPED LED. It operates from -29 to +55 °C.
| Category | |
| Manufacturer | TimeMark |
| Model | 2638 |
| Monitoring Function | Phase Loss, Phase Reversal and Undervoltage |
| Number of Phases | 3-Phase |
| Input Voltage | 208/240V AC |
| Undervoltage Trip Range | 160...240V AC |
| Undervoltage Trip Adjustment | Field adjustable |
| Trip Delay - Phase Loss and Reversal (ms) | 0.05 s |
| Reset Method | Automatic |
| Status Indicator | Line voltage LEDs A, B, C; phase sequence LEDs ABC and CBA; TRIPPED LED |
| Contact Configuration | 1C SPDT |
| Output Rating | 10 A at 240 V AC resistive |
| Number of Poles | 1 |
| Mounting Type | Surface Mount |
| Dimensions | 3.88" W x 5.5" H base (3.0" mounting, .19 dia. typ.), 6.06" mounting length, depth .62" + 2.08" |
| Operating Temperature (Storage) (°C) | -29...+55 |