$ 149.96
Ensure safe operation with Phoenix Contact EMD-BL-3V-400-PT relay. Reliable 3-phase voltage monitoring with LED status and compact DIN rail design.
The Phoenix Contact EMD-BL-3V-400-PT monitoring relay delivers dependable supervision of three-phase voltage systems, ensuring smooth and safe operation of industrial equipment. Designed for 400 V AC networks with a tolerance of ±30%, it provides fast installation thanks to push-in terminals and a slim 17.5 mm housing. Clear LED indicators simplify status checks, while the integrated changeover contact allows flexible connection to control systems. By continuously monitoring voltage and phase sequence, the relay helps prevent system errors and costly downtime, making it an essential choice for machinery, energy systems, and building automation.
The EMD-BL-3V-400-PT combines advanced monitoring functions with practical usability. Adjustable response delays allow brief voltage fluctuations to pass without interrupting operations, reducing unnecessary shutdowns. Its compact, robust design fits seamlessly into DIN rail installations, conserving space in control panels. Engineered for durability with precise detection accuracy, it ensures reliable operation in diverse environments, from production lines to critical infrastructure. By detecting faults early and providing immediate visual and electrical signaling, the device enhances safety, extends system lifespan, and reduces maintenance costs—delivering both performance and peace of mind for operators and engineers.
Why Phoenix Contact EMD-BL-3V-400-PT?
Because it’s more than just a relay—it’s a safeguard for your entire system. The EMD-BL-3V-400-PT combines precision voltage monitoring, compact design, and fast push-in wiring to deliver peace of mind. Its smart indicators and reliable changeover contact keep engineers informed at all times, ensuring processes run smoothly without unexpected interruptions.
What problem does it solve?
Power quality issues in three-phase networks can cause downtime, equipment damage, and high maintenance costs. This monitoring relay detects undervoltage, overvoltage, and phase sequence errors before they escalate. By instantly signaling faults and preventing system failures, it transforms unstable energy conditions into controlled, reliable operation—keeping machines safe and productivity uninterrupted.
| Feature | Details | Benefit |
|---|---|---|
| Voltage Monitoring | 3-phase, 400 V AC ±30% | Reliable supervision of power quality across networks |
| Phase Sequence Detection | Included | Prevents damage from incorrect wiring or power faults |
| Contact Type | 1 floating changeover contact (5 A / 250 V AC) | Flexible integration into control and safety circuits |
| Response Delay | Adjustable 0.1–10 s | Avoids unnecessary trips during short voltage dips |
| Indicators | LED status (yellow) and error (red) | Immediate visual diagnostics for quick maintenance |
| Housing Width | 17.5 mm | Space-saving design for compact DIN rail mounting |
| Protection Degree | IP40 (housing) / IP20 (terminals) | Safe operation in standard industrial environments |
| Standards & Compliance | CE, UL Listed, RoHS, EMC compliant | Meets international safety and environmental standards |
| Operating Temperature | -25 °C … +55 °C | Reliable function in diverse industrial conditions |
| Service Life | Electrical: 100,000 cycles | Long-lasting performance reduces replacement needs |
Download Phoenix Contact EMD-BL-3V-400-PT : 2903526 Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4046356747226 |
| Tariff Number | 85364900 |
| Weight | 73.18 g |
| Country of Origin | Austria (AT) |
In automated production facilities, three-phase motors drive conveyors, mixers, and cutting machines. Even short-term voltage drops or a wrong phase sequence can overheat windings or cause sudden failures. By installing the EMD-BL-3V-400-PT relay ahead of the motor controls, engineers can continuously track voltage balance and phase order. Its adjustable response delay ensures that only genuine faults cause intervention, preventing costly downtime while still shielding equipment from damage.
Air conditioning units, chillers, and ventilation fans in large facilities rely on balanced three-phase power. If the supply becomes unstable or phases are connected incorrectly, systems can operate inefficiently or break down. The EMD-BL-3V-400-PT relay helps by detecting incorrect sequences and over/undervoltage conditions, cutting the system only when needed. Maintenance teams can quickly identify issues through the relay’s LED indicators, helping restore building comfort without prolonged service interruptions.
Municipal water facilities often run continuously with heavy-duty pumps powered by three-phase motors. Unmonitored voltage disturbances risk reversing pump direction or seizing the system entirely. The EMD-BL-3V-400-PT relay provides reliable oversight, instantly recognizing unsafe voltage levels or incorrect wiring. With its configurable time delay, brief supply dips do not trigger unnecessary stops, while persistent problems are flagged for corrective action. This protection extends pump life and maintains uninterrupted water flow to communities.
Renewable power systems, such as solar farms or small wind installations, must maintain grid stability when feeding electricity into three-phase networks. Variations in supply voltage or incorrect phase order can endanger inverters and violate grid requirements. The EMD-BL-3V-400-PT relay keeps feed-in points under constant surveillance, disconnecting circuits if thresholds are exceeded. Its compact design makes integration easy, while LED indicators allow technicians to verify grid readiness quickly. This ensures safe, efficient, and compliant renewable energy operation.
| Category | Model Name | Part Number | Benefits |
|---|---|---|---|
| Monitoring Relay (Variant) | EMD-BL-1V-230-PT | 2905500 | Single-phase monitoring relay, ideal for applications not requiring 3-phase supervision |
| Monitoring Relay (Variant) | EMD-BL-3V-230-PT | 2905502 | Monitors 3-phase systems at 230 V AC, suitable for lower voltage grids |
| Power Supply | QUINT POWER 24 V / 5 A | 2866753 | Reliable DIN rail power supply to feed control systems alongside monitoring relays |
| DIN Rail Terminal Blocks | UT 2,5 Push-in Series | 3044076 | Simplifies wiring of relay outputs and improves connection reliability |
| Surge Protection Device | VAL-MS 230 ST | 2838204 | Protects monitoring relay and connected equipment from transient overvoltage |
| DIN Rail (Accessory) | NS 35/7,5 Steel Rail | 0800886 | Standard mounting rail for quick installation of the relay in control cabinets |
| LED Signal Tower | Signal Tower Element – Red/Green | 2708597 | Provides visual indication when faults are detected by the monitoring relay |
| System Cabling | PLC-INTERFACE Relay Adapter Cables | 2903344 | Ready-made cabling for easier integration of relay signals into PLC or control systems |
For expert guidance before placing your order.
Warranty – 1-year warranty for your peace of mind.
Global Shipping – We ship worldwide with secure packaging and reliable delivery.
Technical Support – Contact us for professional after-sales technical assistance.
