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Littelfuse PLMU11 Voltage Monitor
The PLMU11 voltage monitor continuously measures the voltage of each phase in a three-phase system, protecting motors and sensitive loads against overvoltage, undervoltage, unbalance, phase loss, and reversal. It features automatic voltage range selection, microcontroller-based sensing, and quick visual diagnostics via LEDs. The device offers a small form factor with universal mounting options, isolated 10A SPDT relay contacts, and complies with safety standards for industrial motor protection, elevators, and surge conditions. It automatically resets after faults are cleared, providing reliable real-time voltage protection.
Littelfuse PLMU11 Voltage Monitor Specifications:
- Line Voltage: 200 to 480VAC ±15%, 50/60Hz
- Voltage Ranges: 200-240VAC, 340-420VAC, 400-480VAC with automatic selection
- Maximum Voltage: 552VAC
- Power Consumption: <5W
- Trip Delay: 0.25 to 30 seconds adjustable
- Overvoltage Trip Point: 109-113% of set voltage
- Undervoltage Trip Point: 88-92% of set voltage
- Voltage Unbalance Trip Range: 2-10%
- Reset Voltage: +2% (overvoltage), -2% (undervoltage)
- Phase Reversal & Loss Trip Time: <150ms
- Output: Isolated SPDT relay, 10A resistive @ 240VAC
- Environmental: Operating -40°C to 60°C, Storage -40°C to 85°C
- Mounting: Plug-in socket, DIN rail or surface
- Protection: Surge IEEE C62.41-1991 Level B, >2500V isolation
- Dimensions: H 77mm, W 60.7mm, D 45.2mm
- Certifications: UL, CE compatible
Buy the Buy Littelfuse Voltage Monitor Part Number PLMU11 Online
Enhance your system safety with the Littelfuse PLMU11 voltage monitor. It provides precise continuous voltage measurement, automatic fault detection, and reliable protection for three-phase motors and sensitive equipment. Featuring universal mounting, LED diagnostics, and compliance with safety standards, this device ensures optimal operation. The simple 3-wire connection facilitates easy installation across diverse systems. Trust the PLMU11 to automatically reset after faults, minimizing downtime and preventing costly damages, making it a vital addition for industrial, commercial, and infrastructure applications.
Order your Littelfuse SeriesPLMU11 voltage monitor today and ensure reliable protection for your three-phase motors and sensitive loads.
Frequently Asked Questions
Where can I buy Littelfuse PLMU11?
You can click on the BUY or RFQ button to purchase PLMU11 from an authorized Littelfuse distributor.
How do I troubleshoot issues or seek technical support for part PLMU11?
You can download the PLMU11 datasheet or visit the Littelfuse website for support.
Who is the manufacturer of PLMU11?
Littelfuse