ASCO Power Technologies B9403100 Automatic Transfer Switch Controller

ASCO Power Technologies’ B9403100 Automatic Transfer Switch Controller is a dedicated control module that governs the operation of an automatic transfer switch in power systems, delivering precise control signals for source monitoring and transfer sequencing while coordinating with the host switch to ensure orderly, reliable transitions. Designed for 480V, 60 Hz service and a 100 A load, it coordinates the logic and timing required for automatic switchover between utility and alternative power sources, enabling fast, predictable transitions and reducing the likelihood of simultaneous source energization through proper interlock handling. As part of the ASCO transfer switch family, the B9403100 provides the essential control logic that initiates transfers when monitored conditions exceed predefined thresholds, translating sensor inputs into coordinated control signals for the connected transfer switch. This controller is intended for use with ASCO automatic transfer switch assemblies configured for 480V systems, and it is designed to support reliable automatic switching in installations where uninterrupted power supply and proper source selection are critical.