SIEMENS LINE MONITORING RELAY 3UG4513-1BR20 , Phase Imbalance 20% , Off delay 0.1 - 20 s ,1CO

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The 3UG4513-1BR20 is a reliable 3-phase line monitoring relay from Siemens that ensures safe operation by detecting phase imbalance (≥20%), phase failure, and incorrect phase sequence. Ideal for industrial motor protection with adjustable off-delay timing.


Key Features:

  • Phase imbalance detection: ≥20%

  • Monitors phase loss, sequence, and asymmetry

  • Adjustable off-delay: 0.1 – 20 seconds

  • Output Contact: 1 CO (Changeover Contact)

  • Operating voltage range: 160–690V AC

  • DIN rail mounting

  • LED status indicators

  • Compact, panel-friendly design

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