Phoenix Contact EMD-FL-V-300 Voltage Monitoring Relay

Phoenix Contact EMD-FL-V-300 Voltage Monitoring Relay – Precision for 1-Phase Systems

The Phoenix Contact EMD-FL-V-300 Voltage Monitoring Relay provides dependable supervision of single-phase AC or DC voltages up to 300 V. Built to detect both under and overvoltage conditions, as well as deviations within a defined window, it helps keep equipment safe and running without disruption. A built-in memory stores error events, giving maintenance teams quick insights for troubleshooting. With a slim DIN-rail design, wide supply voltage range, and LED status indicators, this relay offers flexibility and clear visibility. It’s a compact yet vital solution for industries that require stable power quality and continuous system reliability.

The Phoenix Contact EMD-FL-V-300 Relay is engineered to increase uptime by continuously monitoring electrical values, ensuring early detection of power anomalies. Two floating changeover contacts enable direct communication with control systems, allowing fast reactions such as alarms or safe shutdowns. Front-facing adjustment dials make setup quick and precise, while response and startup delays can be customized to handle short-term fluctuations without unnecessary interruptions. Error memory enhances diagnostics, capturing transient events for easier analysis. Whether in machine building, process automation, or energy systems, this monitoring relay protects assets, improves safety, and lowers operational risk, supporting long-term, reliable performance.

Why Phoenix Contact EMD-FL-V-300?

The Phoenix Contact EMD-FL-V-300 is trusted because it combines compact design, flexible voltage range, and intelligent monitoring into one device. Its error memory, adjustable delays, and LED status display give engineers precise control while simplifying troubleshooting. Whether in automation, machinery, or energy systems, it ensures continuous reliability by safeguarding equipment against damaging voltage fluctuations.

What problem does it solve?

The EMD-FL-V-300 Monitoring Relay solves the critical challenge of unstable power conditions. Overvoltage, undervoltage, or short fluctuations can cause downtime, equipment failures, and costly repairs. This relay detects and reacts instantly, sending signals to control systems or initiating safe shutdowns. By preventing faults from spreading, it keeps operations running smoothly, minimizes risks, and extends the lifespan of valuable electrical assets.

Key Features & Specifications – Phoenix Contact EMD-FL-V-300 : Article No. 2866048

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Commercial Information – Phoenix Contact EMD-FL-V-300 : Article No. 2866048

The Applications of Phoenix Contact EMD-FL-V-300

1. Solar Power Inverter Safety

In solar energy systems, sudden voltage spikes or drops can damage inverters and reduce system lifespan. The EMD-FL-V-300 relay continuously monitors the 1-phase lines, instantly detecting when voltage drifts outside the safe window. Its adjustable delays allow it to ignore short fluctuations caused by switching, while the error memory logs persistent faults. This ensures solar inverters operate within safe limits, protecting both panels and downstream power equipment.

2. UPS and Backup Power Reliability

Uninterruptible power supplies are critical in data centers, hospitals, and process plants. Voltage irregularities at the input or output can cause expensive downtime. The EMD-FL-V-300 monitors line voltage in real time, triggering alarms or switching to backup sources if limits are exceeded. Its wide voltage range and floating contacts make it easy to integrate into UPS panels. This safeguards sensitive equipment while maintaining seamless power continuity during disturbances.

3. Industrial HVAC and Motor Control

Air handling units, compressors, and industrial fans rely on consistent voltage to avoid motor stress. With the EMD-FL-V-300 installed in the control panel, voltage levels are supervised constantly. If under-supply or overvoltage occurs, the relay reacts quickly to disconnect or signal maintenance. The built-in LED indicators simplify fault detection on site, while error memory supports diagnosis of intermittent supply issues that could otherwise remain hidden.

4. Battery Charging and Energy Storage Systems

Energy storage units and telecom backup batteries demand precise voltage monitoring to prevent overcharging or deep discharge. The EMD-FL-V-300 ensures stable operation by supervising the DC bus and output lines within the system. Its window monitoring function alerts operators to voltage deviations before they cause cell damage. Compact DIN-rail mounting allows seamless integration in tight battery enclosures, while adjustable response times reduce false trips during load transitions.

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