FAQ

How do I specify the type of neutral?
A Solid Neutral means that the system neutral conductors (load, emergency and utility) are solidly
bonded to a common lug and a copper plate. The connection of the 3 neutral conductors is fixed to the
common lug. It is denoted by an A2 (2 pole) or A3 (3 pole) in the catalog.
A Switched Neutral means that the load neutral conductor connection is switched between the
emergency neutral and the utility neutral. It is denoted by a B2 (2 pole) or B3 (3 pole) in the catalog
number string.
An Overlapping Neutral means that the load neutral conductor is connected to both the normal and
emergency neutrals before the transfer and then remains in the position where the switch transferred
to. It is a make before break neutral design. It is denoted by a C2 (2 pole) or C3 (3 pole) in the catalog
number string.
What is the Withstand Current Rating (WCR) of my transfer switch?
Refer to Publication 1128-R14.
Which breakers are tested with an ASCO transfer switch?
Refer to Publication 1128-R14 for tested breakers for ASCO switches.
Service
Can I modify the voltage rating of the ATS?
To modify the voltage rating of the ATS, you’ll need to replace the coil kit and set the factory jumpers of
the control panel. Contact ASCO Services for a service technician (1-800-800-ASCO).
How can I extend feature 1C timer?
You can extend the time delay before engine start with any backup power accessory. The feature needs
to be set-up by an ASCO Service technician.
How do I contact a service technician?
Call 1-800-800-ASCO (2726) and choose option 2 then 3.
How can I convert an ACTS to an ATS?
Contact ASCO Services (1-800-800-ASCO).
How do I convert an ATS to an ADTS?
This is not possible on the field. You may have the switch shipped to the factory for the modification or
you may opt to replace the ATS for practical reasons.
How do I convert the ATS from 1Φ to 3Φ?
Preferably contact ASCO Services to review wiring (1-800-800-ASCO).
How will I know if the controller is damaged?