Basler Electric BE1-25A Automatic Synchronizer

The Basler Electric BE1-25A is a microprocessor-based automatic synchronizer engineered to achieve precise generator synchronization with minimal transients. This solid-state device automatically adjusts incoming generator speed, voltage, and phase angle to match the system, closing the breaker when phase angle approaches zero. An anticipatory close signal - calculated from preset breaker closing time and measured slip frequency - ensures smooth connection across a wide range of prime movers, from slow-responding hydroturbines to fast gas and diesel engines. ## Technical Specifications Synchronization Parameters • Voltage magnitude: adjustable limits to match system voltage acceptance criteria • Slip frequency: wide operating range for compatibility with various prime mover types • Phase difference: breaker closure near zero phase angle between generator and bus • Advance angle: calculated from breaker closing time and measured slip frequency Electrical Specifications • Power supply: 90–132 Vac (50/60 Hz single phase) or 70–150 Vdc; burden <20.0 VA • Voltage sensing inputs: 70–150 Vac (50/60 Hz); <6 VA generator, <2 VA bus • Contact sensing inputs: minimum 0.05 A at 250 Vdc • Breaker closing output: 30 A at 250 Vdc for 1 second; 7 A continuous; break 0.3 A at 250 Vdc (L/R = 0.04) • Lockout output: 5 A at 250 Vac (80% PF), 5 A at 28 Vdc (resistive), 0.5 A at 120 Vdc (resistive) ## Key Features • Microprocessor-based control with anticipatory close logic for transient-free synchronization • Non-volatile memory supports up to six independent generator/breaker configurations • Solid-state design for accuracy and repeatability • Simple HMI for field configuration without external computer • Front panel test module terminals for commissioning and diagnostics ## Typical Applications Generator synchronization to utility systems, parallel operation in microgrid environments, and multi-generator power systems requiring coordinated breaker closure and voltage acceptance verification. ## Compatibility & Integration The BE1-25A accepts optional voltage acceptance modules (A1, A2) that enforce generator voltage magnitude and bus voltage conditions prior to breaker closure. The A2 module allows independent configuration of high/low bus voltage and voltage difference parameters.