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Time Mark 257B-400HZ – 3-Phase Monitor, Automatic Reset, 208/240VAC, Red, 160-240VAC, 400Hz, 2.4W
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Original price was: $122.10.$91.12Current price is: $91.12.
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3-Phase Monitor, Automatic Reset, 208/240VAC, Red, 160-240VAC, 400Hz, 2.4W
- 3-Phase monitor
- Automatic reset
- Nominal AC(phase to phase): 208/240VAC
- Case color: Red
- Adjustment range: 160-240VAC
- Frequency: 400Hz
- Power: 2.4W
- ABS plastic cover
- 8-pin socket mounting (sold separately)
- Detects phase loss, low voltage, phase reversal
- 5-year unconditional warranty
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Description
Time Mark 257B-400HZ – 3-Phase Monitor, Automatic Reset, 208/240VAC, Red, 160-240VAC, 400Hz, 2.4W
- 3-Phase monitor
- Automatic reset
- Nominal AC(phase to phase): 208/240VAC
- Case color: Red
- Adjustment range: 160-240VAC
- Frequency: 400Hz
- Power: 2.4W
- ABS plastic cover
- 8-pin socket mounting (sold separately)
The Time Mark 257B-400HZ 3-Phase Monitor continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the unit will detect phase loss on a loaded motor even when regenerated voltage is present. The 257B-400HZ model offers automatic reset, 208/240 VAC of nominal AC voltage, red case color, 160-240VAC adjustment range, 400Hz frequency, and 2.4W power consumption.
This device consists of a solid-state voltage and phase-angle sensing circuit, driving an electromechanical relay. When the correct voltage and phase rotation are applied, the internal relay will energize. A fault condition will de-energize the relay. When the fault is corrected, the monitor will automatically reset (a manual reset version is also available).
The Model 257 series does not require a neutral connection and can be used with Wye or Delta systems. Voltage ranges are sufficiently wide to allow for proper adjustment to existing conditions. Both TRIP and NORM condition indicators are provided to aid in adjustment and system trouble-shooting.
Dimensions:
Dimensions have tolerance of ± 0.06
Typical Application:
Three Phase Monitor Relays | |
|---|---|
| 3-Phase Monitor Relay Function | Phase Loss/Phase Reversal/Under Voltage Only |
| Max Nominal Phase to Phase Voltage (monitors) | 240 VAC |
| Monitor Relay Contact Type | SPDT |
| Electrical Approval (monitor relays) | CSA, UL |
| Time Mark Mounting | 8-pin |
Product General Attributes | |
| Warranty | 5 YEARS |
| Warranty Details | This product is warranted to be free from defects in materials and workmanship, and is covered by our exclusive 5-year Unconditional Warranty. |
| Safety Approval | CSA, UL |
| Product Weight | 0.31 LBS |
| Product Height | 3.52 IN |
| Product Length | 2.44 IN |
| Product Width | 1.75 IN |
| Shipping Weight | 0.35 LBS |
| Country of Origin | United States |
| Shipping Height | 3.52 IN |
| Shipping Length | 2.44 IN |
| Shipping Width | 1.75 IN |
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Manuals/Guides
Spec Sheets
| Weight | 0.31 lbs |
|---|---|
| Dimensions | 2.44 × 1.75 × 3.52 in |
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Time Mark 257B-400HZ – 3... Original price was: $122.10.$91.12Current price is: $91.12.
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Contact Us Now:
📧 sales@nestesinstruments.com
📞 +1 (833) 763-7837
Let us assist you in finding the perfect solution!
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