SymCom SSAC 3-Phase Voltage Monitor

Request for Quote
  • Manufacturer: Littelfuse
  • Product Family: PLMU Series
  • Product Type: Voltage Monitor
  • Frequency: 50/60Hz
  • Input Voltage: 200-480VAC
  • Max. Operating Temperature: 140 F
  • Min. Operating Temperature: -40 F
  • Mounting Method: Plug-in Socket Rated 600V
  • Output Form: SPDT
  • Termination Type: Octal 8-pin plug-in
  • Weight: 0.538 lb
SymCom PLMU Series 3-Phase Voltage Monitor, simple 3-wire connection for delta or wye systems, isolated 10A, SPDT output contacts, 200-480VAC 50/60Hz input voltage, 5W, SPDT output, LED indicator, -40 to 140 F op temp

Contact Our Motion Control & Automation Experts

Contact our experts to answer questions or help you with your application needs.


  • Control & Automation Engineering
  • Control Panel Services
  • Control System Design
  • Machine Vision Services
  • Maint/Repair Service Contracts
  • PLC Services
  • Rexroth Indramat Repair Center

Product Description

PLMU11 The PLMU11 monitor continuously measures the voltage of each of the three phases to provide protection for 3-phase motors and sensitive loads. Its microcontroller senses under and overvoltage, voltage unbalance, phase loss, and phase reversal. Protection is provided even when regenerated voltages are present. Universal voltage operation and standard base connection allows the PLMU11 to replace hundreds of competitive part numbers. FEATURES
  • Quick octal 8-pin mounting
  • Proprietary microcontroller based circuitry
  • LED diagnostics
  • Isolated, 10A, SPDT output contacts
  • Simple 3-wire connection for delta or wye systems
  • Complies with ASME A17.1 Rule 210.6, NEMA MG1 14:30, 14:35, IEEE C62.41-1991 Level B