Generac Power Systems CTTS Series Specification

100 - 400 Amps,
600 VAC
The Generac closed transition transfer switch (CTTS) offers an effective solution for the problem of momentary loss of power during
transfer.
The Generac CTTS will eliminate momentary power interuption, when both sources are present and synchronized, by transferring
the loads with an overlapping contact arrangement.
Standard Features
• Independent operators for each source, electrically operated
and mechanically held
• Digital display, programmable exerciser
• SPDT auxiliary contacts on each side of switch
(wired to terminal strip)
• Main contacts are silver plated or silver alloy to resist
welding and sticking
• Conformal coating protects all printed circuit boards
• Indicating lights for enabled sources—Normal, Emergency
• NEMA 1 enclosure with hinged door and key-locking handle
• Three-position switch—Fast Test, Auto, Normal Test
Automatic Transfer Switches
Closed Transition Transfer Switch (CTTS)
• Separate, redundant circuitry to monitor and prevent
extended paralleling of the two sources.
• Failure to synchronize and ATS locked out indicating lamps.
• Maximum source interconnection time = 100 milliseconds
during closed transition operation.
• Control switches located on the front of the door for ease of
operation.
• CTTS is UL 1008 listed and CSA certified.
• Electrically-operated, mechanically-held contacts for fast,
positive connections.
• Rated for all classes of load, 100% equipment rated, both
inductive and resistive with no derations.
• 3 and 4 Pole 600 VAC contactors.
Additional Sets of auxiliary contacts (each side) •
Optional Accessories
NEMA 12 dustproof enclosure •
NEMA 3R rainproof enclosure •
NEMA 4 and 4X Enclosure •
4-pole contactor for neutral isolation •
Exterior AC meter package •
Signal before transfer •
Remote auto control •
Manual bypass for return to normal •
Preferred source selector switch •
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