813S-V3-400V

Overview of Allen Bradley 813S-V3-400V

The Allen Bradley 813S-V3-400V is a three-phase voltage monitoring relay designed for continuous protection and monitoring of industrial power systems. Engineered by Rockwell Automation, this relay safeguards equipment against under-voltage, over-voltage, phase loss, phase imbalance, and phase reversal scenarios common in 380–415V AC systems. Self-powered and suitable for 50 to 400 Hz operation, it integrates easily into control panels without the need for auxiliary power supplies. Two SPDT contacts provide reliable signaling for alarms or system shutdowns, while adjustable time delays help prevent nuisance trips from transient faults. The Allen Bradley 813S-V3-400V meets demanding control and protection requirements in critical industrial installations, offering reliable performance, programmable latching or inhibit at set levels, and auto reset features.

Key Features of Allen Bradley 813S-V3-400V

• Monitors three-phase voltage (380–415V AC range)
• Self-powered—no external supply needed
• Protects against under-voltage, over-voltage, phase loss, imbalance, and reversal
• Adjustable time delay reduces false alarms
• Two SPDT contacts for flexible control integration
• Auto reset and programmable latch/inhibit modes
• Meets IP20 degree of protection, Pollution Degree 3 standard
• DIN rail mountable, compact design

Technical Specs of 813S-V3-400V

• Voltage range: 380–415V AC (three-phase), 50–400 Hz
• Power consumption: 13 VA @ 400V AC, 50 Hz
• Contacts: 2 × SPDT, 250V AC rated insulation
• Time delay: 1 s ±0.5 s or 6 s ±0.5 s (power ON); adjustable trip delay
• Environmental: IP20 enclosure, Pollution Degree 3
• Dimensions: 45 × 80 × 99.5 mm (W × H × D)
• Screw terminal torque: max 0.5 N•m

Applications / Use Case

The Allen Bradley 813S-V3-400V is widely used in industrial power systems where continuous monitoring and reliable protection of three-phase equipment are crucial. Typical applications include motor control centers, pump stations, HVAC systems, conveyors, and automated machinery. Its precise detection of voltage anomalies helps prevent costly damage to motors, drives, and sensitive processes. The relay’s programmable time delays and auto reset make it suitable in environments sensitive to voltage fluctuations, reducing machine downtime and system trips caused by transient events. Facilities managers, OEMs, and panel builders integrate the 813S-V3-400V to maintain operational uptime and ensure system safety, particularly in harsh environments where unplanned interruptions or phase failures can disrupt critical operations.

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