Systems  /  Power Systems  /  Electric Power Generation  /  ATS MX Contactor 	 CTS Series Automatic Transfer Switch

CTS Series Automatic Transfer Switch

Rating Range
40 to 4000A
40 to 4000A
Transfer Type
Open transition
Open transition
Switch Type
Contactor Based
Contactor Based

Product Specifications for CTS Series Automatic Transfer Switch

Technical Summary

Electrical Ratings

CTS Series Automatic Transfer Switch Standard Equipment

The Cat CTS Series of Automatic Transfer Switches

  • The Cat CTS Series power contactor type transfer switch makes use of a fully programmable / configurable microprocessor-based controller to allow the utmost in application flexibility. Further, the CTS Series is offered in a wide array of configurations enabling it to meet the needs of even the most highly critical load.Available configurations include:

40-4000 Amps:

  • CTSD Delayed Transition Transfer Switches
  • CTSM Manual Transfer Switches
  • CTS Automatic Transfer Switches

100-4000 Amps:

  • CTSCT Closed Transition Transfer Switches
  • CBTSD Delayed Transition Bypass Switches
  • CBTSCT Closed Transition Bypass Switches
  • CBTS Automatic Transfer/Bypass Switches

All CTS products meet or exceed industry requirements to allow specification and installation with confidence.

  • Codes and Standards: NFPA 0,99, 101,110,NEC 517,700,701,702,IEEE 446, 241,NEMA ICS2-447
  • CSA C22.2 No. 178 listed through 600 VAC
  • Quality System:
    ISO 9001 Registered
  • UL 1008 listed through 480 VAC
  • Controls tested in accordance with:
  • Equipment (Controls and Power Section)Seismic Test Qualified to:
    IBC-2003
    IEEE-693-2005
  • Enclosures meet the requirements of:
    UL 508, UL 50, ICS 6, ANSI C33.76 and NEMA 250
  • IEC 947-6-1 listed through 480 VAC
  • This ruggedly built family of power contactor switches has been specifically designed for transfer switch duty with dependability, versatility and user friendliness of prime concern.
    The CTS power panel components, consisting of power switching contacts, drive mechanism and terminal lugs, are mounted on a specially formed backplane. Logic devices including microprocessor control auxiliary time delays and special accessory equipment are assembled on the door for ease of maintenance and separation from the power section. They are connected with a numbered wiring harness equipped with a disconnect plug that allows isolation of the control panel for maintenance.

CTS Series Method of Operation

  • When the normal source fails or the voltage drops to a predetermined point (usually 80% of nominal), if required, a circuit is closed to start the engine generator set. When the emergency source reaches 90% of rated voltage and 95% of rated frequency, the drive solenoid is energized through the emergency coil control relay, causing the main contacts to disconnect the load from the normal source and connect it to the emergency source. After the drive solenoid has completed its electrical stroke and is seated, the emergency coil control relay opens to disconnect it. The transfer switch is now mechanically locked in the emergency position. When normal voltage is the normal source and connect it to the emergency source. After the drive solenoid has completed its electrical stroke and is seated, the emergency coil control relay opens to disconnect it. The transfer switch is now mechanically locked in the emergency position. When normal voltage is and is seated, the coil control relay opens to disconnect it. The transfer switch is now mechanically locked in the normal position.

Drive Mechanism

  • All CTS switches employ the simple “over-center” principle to achieve a mechanically locked position in either normal or emergency and a high speed drive assures contact transfer in 100 ms or less. High contact pressure and positive mechanical lock allow for high withstand and closing ratings, far exceeding UL requirements.

See how CTS Series Automatic Transfer Switch compares against frequently compared products.

Tools And Expert Help At Every Turn

Information Library

We have an information library of product literature, white papers, customer stories, and more. Find what you’re looking for.

Learn More

Technical Resources

Explore valuable resources for generator sizing, specification, and training materials.

Learn More

SpecSizer

Calculate what generator size you need by using our commercial and industrial generator sizing calculator, SpecSizer.

Learn More

Cat Connect: Get More from Every Asset

Now there's an easier way to track and manage your equipment anytime, anywhere.

Learn More

Customer Value Agreements

Every piece of Cat equipment is designed and built to provide maximum productivity and operating economy throughout its working life. Your Cat dealer can help you maintain that built-in value through a Customer Value Agreement (CVA).

Learn More

Extended Service Coverage

Spend less time managing your equipment and more time running your business with options to protect you against unexpected repair costs.

Learn More

Custom Power Solutions

There are no standard power solutions. Cat experts work with you to design a system to meet your individual power needs.

Learn More

Hire Similar Size

View our full lineup of construction equipment rental products featuring a wide range of portable generator rental options as well as mobile generator sets for hire.

Learn More

Product Brochures and More Are Ready to Download!

Full specifications, product brochures and more. Sign up below for additional information. Or for instant access, you can skip this form.


Check out current offers for the CTS Series Automatic Transfer Switch

View More Offers