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Allen-Bradley 1402-LS51 is a line synchronization module designed for precise phase alignment in industrial power systems. Part of the Bulletin 1402 product family, it enables synchronized transfer between power sources for critical applications. Featuring dual-voltage sensing (120-600V AC), adjustable phase-angle matching, and LED status indicators, it ensures safe load transfers in generator switchgear, UPS systems, and dual-fed industrial processes.
Product Specifications
Detailed Product Features
Core Specifications
Voltage Range: 120-600V AC (line-to-line), 50/60Hz
Phase Detection: ±10° adjustable synchronization window
Inputs: 2 independent 3-phase voltage sensing circuits
Outputs:
Accuracy: ±1° phase angle detection
Key Functional Attributes
Synchronization Control
Auto-phase matching with adjustable slip frequency
Dead bus detection (<15% Vnom)
Vector surge protection (anti-islanding)
Configuration Features
Diagnostics
6-LED status panel (Sync, Bus1, Bus2, Alarm, etc.)
Test mode for offline verification
Physical Specifications
Enclosure: NEMA 1 (IP20)
Dimensions: 5.7 x 1.8 x 4.3 in (145 x 45 x 110 mm)
Terminations: Screw-clamp terminals (12 AWG max)
Operating Temp: -20°C to +60°C (-4°F to +140°F)
3. Typical Applications
Generator Transfer Systems: Closed-transition switching
Microgrid Interconnection: Renewable energy synchronization
Industrial UPS: Bypass-to-main transfers
Process Critical Power: Dual-utility feed synchronization
4. Wiring & Installation
Voltage Sensing: PTs required for >600V systems
Relay Output: Dry contact for breaker control
Mounting: DIN rail (TS35) or panel mount
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