Toll Free: (877) 571-7901
Local: (732) 728-2590
salesteam@tequipment.net
My Account
Sign in to see your member price, rewards, orders, tracking and more.
Why Join? Gain access to exclusive pricing, rewards and more!
Member Pricing & Rewards active
(877) 571-7901
Sales@TEquipment.NET
Member Pricing & Rewards are active.
Accurate measurements without the need to precisely position wire or cable in the center of the jaw clamp.SHOP NOW
The SDS3104XHD features an impressive array of measurement and math capabilities, options for a 50 MHz arbitrary waveform generator, as well as serial decoding. SHOP NOW
The Megger IMT100 is the most versatile multi-tester for PV systems, electric vehicles and industrial applications.SHOP NOW
Similar Items
Let us quote you our best price!
Allow us to earn your business and make this purchase easy.
0 reviews | UPC: 662917001664 | Model: Time Mark 257B-400HZ
3-Phase Monitor, Automatic Reset, 208/240VAC, Red, 160-240VAC, 400Hz, 2.4W
List Price: $111.00
Your Price: $82.84
We accept purchase orders and all major credit cards. We also provide financing via Klarna at checkout for qualifying purchases.
Have a question or need to apply for payment terms?
Contact us.
Have a question? Ask an expert.
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.
Please select a rating star.
Please complete this field.
Email Adrress is not Valid.
Almost there, please complete all required fields
Out of 5
Average Customer Review
Share your thoughts with other customers