Power Transfer Switches

ASCO 7000 SERIES Power Transfer Switch

Ensure the reliable operation of ground fault protection systems and reduction of voltage transients from unbalanced load switching with Vertiv's line of ASCO non-automatic and automatic transfer switches. The ASCO 7000 SERIES Power Transfer Switch features switched or overlapping neutral options. This product is available in the conventional, two-position transfer configuration, plus closed or delayed transition modes of operation.​

Best Suited For
  • Education
  • Healthcare
  • Government
  • Manufacturing
  • Transportation
  • Power Generation
Limited Guardian Warranty


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Conventional two-position transfer configuration, plus closed and delayed transition modes of operation.
Available in bypass-isolation configuration.
UL listed to 1008 Transfer Switch Equipment & CSA certified to CSA 22.2 No. 178-1978 Automatic Transfer Switches.
Rated up to 600 VAC, 30 through 4000 amperes.
High withstand and close-on ratings including 30 cycle withstand current rating for optimum flexibility in circuit breaker coordination (600-4000 amperes).


Reliable and field-proven solenoid operating mechanism ensures maximum performance
Local or Remote serial communication options provide user flexibility.
Protected by a comprehensive warranty.

Services & Support


Contact 800-800-ASCO (2726) or customercare@asco.com for Product Wiring, Diagrams and Drawings.

Frequently Asked Questions
Where can I send remote transfer signal?
The transfer switch has a feature connected to the field connections terminal block (TB) called Feature 17 or Remote Transfer to Emergency Feature. This requires a customer supplied normally open contact wherein closing of the contact causes engine start and transfer to the emergency source.
How does the ATS work?
The ATS works like a conventional open transition transfer switch. The transfer switch main contacts moves in a quick break - before make mode transition. There is no momentary parallel connection of the two sources and no extended center-off position during transfer. The transition is quick. The ATS controller monitors the voltage and frequency of the two sources (upon re-transfer or any transfer between 2 “live” sources) and ensures that they are in-phase before the load is transferred (if enabled).
How will I know if the controller is damaged?
The controller is damaged if the display doesn’t work; If there are extensive signs of burns on the PC board; If the OP and NR relays are no longer functional.
Why won't the ATS transfer to Emergency?
The ATS won’t transfer to Emergency if: Emergency is unavailable; The Transfer to Emergency Inhibit is activated; The Load Shed from Emergency feature is activated; The solenoid operator is damaged; The ER relay is damaged; The controller is damaged; There is mechanical failure.
Where do I connect the engine start wires?
The engine start contacts are also known as feature 7 and 8. Feature 7 is a contact that closes to send an engine start signal and Feature 8 is a contact that opens to send an engine start signal. Refer to the transfer switch wiring diagram for the terminal connections. To request for a wiring diagram just take note of the Serial no., BOM no. and the Catalog no. of the transfer switch and call 1-800-800-ASCO (2726) option 33.


Sales In USA Change Location
ASCO Power Technologies (Maryland, Southern Delaware, Washington DC and VA)
Email Contact +1 571 313 8041 Fax +1 703 342 0391
12310 Pinecrest Road, Suite 204 Reston Virginia 20191 USA
Product areas of focus: Power Transfer Switches, Paralleling Switchgear, Power Control and Monitoring
Support Change Location
ASCO Services, Inc.
50 Hanover Road Florham Park New Jersey 07932
Product areas of focus: Power Transfer Switches, Paralleling Switchgear, Power Control and Monitoring


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