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A History of Great Service, Reliability and Support
For over a century, Eaton has focused on providing quality power-centric products and services. In today’s business environment, customers like you are driving our transformation from a leading global electrical components provider into a customer-centric solutions partner who understands your business.
We do this through in-depth collaboration with customers and subject matter experts studying the issues inherent to the electrical power distribution and control systems. The application section provides you with a broad look at the solution sets that are available or in development in order to help address critical electrical system problems affecting most businesses through an integrated solutions design center.
The Best in Reliability Offers The Best in Transfer Switches
As a premier industrial manufacturer, Eaton’s electrical business is one of the world’s leading suppliers of electrical control products and power distribution equipment with yearly sales of over $2.5 billion. Eaton’s electrical products include a complete line of low and medium voltage assemblies from substations, switchgear and panelboards to loadcenters, transformers and safety switches. These products are used wherever there is a demand for electrical power in residences, high-rise apartment and office buildings, commercial sites, hospitals and factories.
Automatic Transfer Switches
Eaton is one of the pioneering electrical manufacturers and has been focused on providing reliable backup power systems with transfer switch equipment for over 75 years. The automatic transfer switches provide a safe and reliable means to automatically start your generator, and transfer loads to a standby power source when normal power is unavailable. Eaton offers three reliable and sophisticated transfer switch options for you to choose from —Contactor-Based, Molded Case and Circuit Breaker style switches.
24-Hour Automatic Protection
Power outages due to bad weather or utility failure have grown increasingly costly and more disruptive to businesses and homeowners. A backup power system will keep your computers, security system, heating or refrigeration system, cash registers, home health care equipment, or any system that uses electric power, energized and operational. Along with your generator, a Cutler-Hammer Automatic Transfer Switch from Eaton will provide a reliable and safe backup power system for your business or home.
Security
• Prevent loss of power during a utility power failure.
• Prevent personal injury and generator damage.
• Prevent the loss of computer data from extended outages.
• Prevent property loss due to freezing or loss of refrigeration.
• Prevent accidental connection of the generator to the utility.
Service Entrance Equipment
Eaton service equipment rated transfer switches with integral overcurrent protection may be installed at the point of service entrance without the need for separate upstream disconnect devices and their respective power interconnections.
Benefits
- Combined service disconnect, overcurrent protection and automatic transfer switch reduces overall equipment and installation costs.
- Fewer components and power connections reduce maintenance requirements.
Residential Contactor-Based Transfer Switch Standard Features
• Proven, highly reliable microprocessor-based logic provides full automatic operation.
• 100 and 200 ampere ratings for use on 120/240 Vac and 208 Vac, 60 Hz single-phase systems only.
• Fixed time delays provide simple operation — without user programming.
• Four separate time delays:
• Engine start: 3 seconds
• Normal to emergency: selectable 2 or 15 seconds
• Emergency to normal: 5 minutes
• Engine cooldown: 1 minute fixed
• Automatic Plant Exerciser with selectable day, off, 7,14, 28, 15 minutes run time, day, no load.
• Indoor/outdoor NEMA 1 and 3R enclosures.
• Delivered from the factory completely assembled, prewired and tested.
• Only four connections for the installer to complete: utility power, generator power, load circuits and engine start.
• Hinged door with lockable cover.
• ULT 1008 listed.
Product Description
Eaton’s Cutler-Hammer Wall-Mount Transfer Switches are designed for a variety of standby power applications for critical loads. They provide flexibility, reliability and value in a compact package. In the event of a primary power source interruption, a transfer switch provides an effective means to transfer the load circuits to an alternate power source while reducing the possibility of injury or property damage.
Wall-Mount Transfer Switches meet or exceed all industry standards for endurance, reliability and performance. They are listed under Underwriters Laboratories UL 1008 Standard for Transfer Switch Equipment and optionally available as suitable for emergency and standby systems as defined in NFPA 99 for health care facilities.
Electrical Ratings
• Molded case and circuit breaker 30 – 1000 amperes.
• Contactor 100, 200, 320, 400 and 600 amperes.
• 2-, 3- or 4-poles.
• Up to 600 Vac, 50/60 Hz.
• NEMA 1, 3R, 12, open.
• Suitable for emergency and standby systems (all loads).
• UL 1008 listed.
• CSAT C22.2 No. 178 certified.
Industrial Design Highlights
• Double-throw, mechanically interlocked transfer mechanism.
• High withstand and closing ratings.
• Seismic Zone 4 qualified (BOCAT, CBC, IBC, UBCT).
Standard Features
• Auxiliary relay contacts:
• Source 1 present 2NO and 2NC
• Source 2 present 2NO and 2NC
• Switch position indication contacts:
• Source 1 position 1NO and 1NC
• Source 2 position 1NO and 1NC
• Source 1 and Source 2 sensing:
• Undervoltage/ underfrequency
• Overvoltage/ overfrequency
• 3-phase rotation protection
• 3-phase voltage unbalance/loss
• Pre-transfer signal contacts 1NO/1NC.
• Go to Emergency (Source 2).
• Seven field-programmable time delays.
• LCD-based display for programming, system diagnostic and HELP message display.
• Mimic diagram with source available and connected LED indication.
• Time-stamped history log.
• System test pushbutton.
• Programmable plant exerciser — OFF, daily, 7, 14, 28-day interval selectable run time 0 – 600 minutes no load/load with fail-safe.
• Safe manual operation under full load with permanently affixed operating handle.
Optional Features
• Suitable for use as service equipment in the standard enclosure size.
• Available TVSS for power/ controller, engine start circuit, phone and cable connections.
• Integrated distribution panels.
• Field-selectable multi-tap transformer panel permits operation on a wide range of system voltages.
• Integral overcurrent protection.
• Space heater with thermostat.
• Ammeter — load side.
• Stainless steel cover for controller.
Applications
Minimize initial equipment costs, reduce installation time, and increase system reliability. These are goals of all involved in placing electrical distribution equipment in service — from the design engineer, to the electrical contractor, and especially with the end user of the equipment. Eaton believes the transfer switch equipment is an integral part of the distribution equipment. This fundamental belief is why Eaton offers various types of transfer switches for the design engineer, electrical contractor and the user to choose from.
Eaton offers Contactor-Based, Molded Case and Circuit Breaker style switches. All Eaton transfer switches are designed to meet the requirements set forth by UL 1008, however, all transfer switches are not created equal. You can be assured of safe and reliable operation from all types of transfer switches that Eaton offers.
1. UL 1008 Endurance Testing The importance of specifying a UL 1008 transfer switch can be seen in the chart above. When specifying any UL 1008 transfer switch, you can be assured the switch has met and passed the following endurance testing.
2. UL 1008 Life Expectancy Transfer switch applications typically require a plant exerciser once a week or once a month. The chart above demonstrates the life expectancy operating the UL 1008 switch once a week for the life of the switch.
3. Service Entrance Rated Transfer Switches Modifying the molded case switch in the transfer switch by adding trip units and optional ground fault, along with adding the service entrance option eliminates the need for separate upstream disconnect devices and their respective power interconnections. This means the Automatic Transfer Switch (ATS) is installed directly at the point of service entrance, saving valuable space and cost.
4. Built-in Protection All Eaton Molded Case Switches are "self protected," such that under extreme fault conditions, the switch will open before destroying itself. This feature allows Eaton to offer "Maintenance Free Contacts" on the molded case transfer switch. The molded case switches have instantaneous magnetic trip units installed in each switch. These trips are not accessible once installed by the factory to eliminate field tapering. The trips are set to a minimum of 12 to 15 times the rated current of the molded case device, well above any coordination set points. This means they will not interfere with the normal operation of the distribution system and will only trip if something is very wrong.
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