Regal Rexnord
Transfer Switches
Regal Rexnord automatic transfer switches(ATS) are the decisive electrical components that monitor utility power and automatically start the standby generator and transfer critical loads to the emergency source when utility power fails — then retransfer to the restored utility once stable — providing the fully automatic, unattended emergency - power response that life - safety, critical - operations, and business - continuity applications demand.Under the ASCO Power Technologies brand, our transfer switch line spans contactor - type ATS for 30 - cycle withstand applications(the majority of commercial and light - industrial installations), bypass - isolation ATS for maintainability without load interruption, closed - transition ATS for seamless generator testing, and delayed - transition ATS for loads that require a center - off pause for system stability.Consulting engineers and facility owners specify ASCO transfer switches for the documented reliability gained from over a century of power - switching innovation, the UL 1008 listing that satisfies electrical - code requirements, and the nationwide service network that provides 24 / 7 emergency support for the most critical component of the emergency power system.As the single point of decision that determines whether life - safety lighting, surgical suites, fire - pump motors, and data - center servers receive emergency power, the transfer switch is the definition of a mission - critical component — and ASCO is the brand most often specified when failure is not an option.
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Trusted by Industry Leaders
High - Endurance Contactor Mechanism
ASCO’s unique single - solenoid operator design has been proven through millions of operations, providing the mechanical and electrical endurance for decades of reliable transfer under load.
UL 1008 Listed for Emergency & Standby Systems
The only UL standard that specifically tests and lists transfer switches for emergency and standby power duty — providing the code - compliance documentation required by electrical inspectors.
Closed - Transition Transfer for No - Break Testing
Paralleling the generator with the utility for a brief moment during retransfer, maintaining load power without the momentary interruption of open - transition transfer — compatible with sensitive IT and process loads.
In - Phase Monitoring for Motor & Inductive Loads
Control logic that monitors the phase relationship between sources and transfers only when within synchronism limits, preventing the damaging torque transients that can occur when transferring inductive loads out - of - phase.
Microprocessor - Based Controller with Communications
ASCO’s Group 5 and 7 controllers provide event logging, programmable engine exerciser, and network communications(Modbus, BACnet, SNMP) for integration with building - management and power - monitoring systems.
Service - Entrance Rated Configurations
Transfer switches rated for use as the service disconnect, meeting NEC requirements for a single main disconnecting means and simplifying installation where the ATS is located at the utility point of entry.
Why ASCO Automatic Transfer Switches Are the Industry Standard
Since inventing the automatic transfer switch in 1925, ASCO has remained the global leader in power - transfer technology, with products installed in more than 150 countries and in the majority of North American hospitals, data centers, and critical infrastructure facilities.This leadership position is maintained through continuous innovation(closed - transition, bypass - isolation, and microprocessor controls all pioneered by ASCO), rigorous product testing(each ATS design undergoes endurance testing to hundreds of thousands of operations under rated load), and a field - service organization that responds to ATS service calls 24 / 7 / 365. When specifying engineers, electrical contractors, and facility owners require a transfer switch that will perform without fail when the utility fails — potentially once in the equipment’s lifetime — they choose ASCO for the accumulated evidence of reliability that no other manufacturer can match.
Transfer Switch Selection: Emergency, Legally Required & Optional Standby
The NEC defines three categories of standby power systems — Emergency, Legally Required, and Optional Standby — each with different ATS requirements for listing, time delay, and load - shed functionality.Emergency systems(life safety) demand a UL 1008 - listed ATS with specific timing and fault - current withstand capabilities.ASCO’s application engineering group assists specifiers and contractors in selecting the exact ATS configuration that satisfies the applicable code for each system branch, ensuring that the electrical design will pass inspection and function as intended when called upon during an outage.