Time Mark A257BM 3-Phase Monitor Manual Reset Yellow 480VAC 60Hz

Description

Product Overview

The Time Mark A257BM 3 Phase Monitor is engineered to provide precise phase detection and reliable manual reset functionality for demanding industrial applications. Designed for 380‑480 VAC three‑phase systems, this relay operates at 60 Hz and consumes only 3.7 W, making it an energy‑efficient choice for control panels. Its bright yellow housing not only enhances visibility but also conforms to industry safety standards, allowing technicians to quickly identify the device during routine inspections or emergency troubleshooting. Constructed from high‑grade dielectric materials, the monitor resists corrosion, heat, and mechanical stress, ensuring a long service life even in harsh environments such as manufacturing plants, processing facilities, and heavy‑duty automation systems.

Usage

This phase monitor is ideal for protecting motors, drives, and other critical three‑phase equipment from phase loss, phase reversal, and unbalanced voltage conditions. It can be installed in motor control centers, PLC cabinets, and distributed control systems where reliable phase monitoring is essential for preventing equipment damage and downtime. The manual reset feature allows operators to acknowledge fault conditions and safely restore power after corrective actions have been taken. Its compact form factor fits standard relay slots, simplifying retrofits and new installations alike. Whether used in automotive assembly lines, food processing plants, or renewable energy installations, the A257BM delivers consistent performance and peace of mind.

Why Choose Us

Choosing the Time Mark A257BM means selecting a product backed by decades of expertise in industrial relays and monitoring solutions. Each unit undergoes rigorous quality testing, including temperature cycling, vibration analysis, and electrical endurance verification, to guarantee reliability under the toughest conditions. Our dedicated support team provides technical assistance, detailed wiring diagrams, and rapid response to any service inquiries, ensuring that your installation proceeds smoothly from start to finish. Additionally, the monitor complies with IEC 60947‑5‑1 standards, offering confidence that it meets global safety and performance criteria.

Key Features

• Manual reset function enables safe fault clearance and system restart.
• Bright yellow housing for instant visual identification in crowded panels.
• Low 3.7 W power consumption reduces overall panel load and energy costs.
• Robust construction resists corrosion, heat, and mechanical shock for long‑term durability.
• Comprehensive after‑sales support with technical resources and rapid response service.

FAQ

What voltage range does the A257BM support?

The monitor is rated for 380 VAC to 480 VAC three‑phase systems, making it suitable for most industrial power distribution applications.

Can the relay be reset remotely?

The A257BM features a manual reset mechanism that must be actuated locally. For remote reset capabilities, a separate control circuit or a different model with remote reset functionality would be required.

Is the device compatible with PLC integration?

Yes, the monitor provides standard contact outputs that can be easily interfaced with PLC inputs, allowing seamless integration into automated monitoring and control schemes.

What is the typical response time for fault detection?

Phase loss or imbalance is detected within a few milliseconds, ensuring rapid protection of downstream equipment.

How does the yellow color improve safety?

The high‑visibility yellow housing helps technicians quickly locate the relay during inspections, maintenance, or emergency shutdowns, reducing the risk of accidental contact with live components.