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Time Mark 257BM 3-Phase Monitor

This 3-phase monitor relay is designed for detecting phase loss, voltage irregularities, and phase reversal in industrial electrical systems. It features a 208/240 VAC coil voltage, solid-state voltage and phase-angle sensing with a mechanical relay rated for 10 million operations, ensuring long-term reliability. The device is suitable for Wye or Delta systems, requiring an 8-pin socket for mounting. It comes with automatic or manual reset options and indicators for normal and trip conditions, making it ideal for motor control and electrical system monitoring in industrial environments.

Authorized Distributors
Part No:257BM
Stock:0
Inv Date:06-11-2026
Price: Unit price: $157.98
Buy/RFQ:

Time Mark 257BM 3-Phase Monitor Specifications:

  • Coil Voltage: 208/240 VAC
  • Contact Configuration: 1 Form C (SPDT)
  • Contact Rating: 10 Amps
  • Relay Life: 10 million operations (mechanical), 100,000 operations at rated load
  • Response Time: 50 milliseconds (set or reset)
  • Transient Protection: 2500 VAC for 10 milliseconds
  • Operating Voltage Range: 85-120 VAC, 160-240 VAC, 380-480 VAC, 300-400 VAC
  • Power Consumption: 0.75W to 4.5W depending on model
  • Enclosure Material: ABS plastic
  • Dimensions: approx. 1.75 inches in height (+0.06 tolerance)
  • Humidty Tolerance: 97% with no condensation
  • Mounting: 8-pin socket (sold separately)
  • Agency Approvals: UL Recognized, CSA Certified

Buy the Buy Time Mark 3-Phase Monitor Part Number 257BM Online

Order the Time Mark 3-Phase Monitor 257BM online today for precise electrical system monitoring in industrial applications. Featuring robust solid-state sensing, this device detects phase loss, voltage irregularities, and phase reversal efficiently. Its long-life relay offers durability with 10 million operations, making it ideal for motor control and electrical protection. The device supports wide voltage ranges and includes indicators for normal and fault conditions, simplifying troubleshooting. With an 8-pin socket, easy installation, and UL approval, this monitor provides reliable, safe, and economical electrical system oversight in demanding environments.

Get Time Mark 3-Phase Monitor 257BM today—designed for reliable phase loss detection and long-lasting industrial performance.

Frequently Asked Questions

Where can I buy Time Mark 257BM?

You can click on the BUY or RFQ button to purchase 257BM from an authorized Time Mark distributor.

How do I troubleshoot issues or seek technical support for part 257BM?

You can download the 257BM datasheet or visit the Time Mark website for support.

Who is the manufacturer of 257BM?

Time Mark

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