CAT CTS User Manual

AUTOMATIC TRANSFER SWITCH
LEHE4651-04
FEATURES
ELECTRICAL RATINGS
● Ratings 40 to 4000 amperes
● 2, 3 or 4 Poles
● NEMA 1, 3R, 4, 4X and 12
● Available to 600 VAC, 50 or 60 Hz
● Suitable for emergency and standby
applications on all classes of load,
100% tungsten rated through 400 amps
● UL 1008 listed at 480 VAC
● CSA C22.2 No. 178 certified at 600 VAC
● IEC 947-6-1 listed through 480 VAC
PERFORMANCE FEATURES
● Contact transfer speed less than 100
milliseconds
● High close-in and withstand capability
● Temperature rise test per UL 1008 conducted
after overload and endurance tests in
unventilated enclosure – exceeds UL
requirements
● Equipped with the MX250 Control Package
CTS SERIES
AUTOMATIC
TRANSFER SWITCH
The Cat
®
CTS Series Automatic Transfer Switch
(ATS) is configurable for applications requiring the
dependability and ease of operation found in
a full featured power contactor type transfer switch.
The CTS Series is equipped with the MX250
controller that is designed for the most demanding
transfer or bypass switch applications.
DESIGN AND CONSTRUCTION FEATURES
● Double throw, interlocked operation
● Electrically operated, mechanically held
by a simple, over-center mechanism
● Silver alloy contacts with separate arcing
contacts on 600 amp and above
● Arc quenching grids, enclosed arc chambers,
and wide contact air gap for superior source to-
source isolation on all units
● Control circuit disconnect plug and drive inhibit
switch for safe maintenance
● Components accessible for inspection and
maintenance without removal of the switch
or the power conductors
● Mechanical indicator and contact chamber
cover designed for inspection, safety and
position designation

CAT CTS Specifications

General

Certifications	CE, FCC, RoHS
Management	CLI
Layer	Layer 2
Jumbo Frame Support	9K
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Humidity	10% to 90% non-condensing

Summary

Features

Electrical Ratings

Details amperage, poles, NEMA types, voltage, and load capacity.

Performance Features

Covers contact transfer speed, close-in capability, and temperature rise.

Design and Construction Features

CTS Series Method of Operation

Drive Mechanism

Neutral Switching

Safe Manual Operation

Transferring Large Motor or Highly Inductive Loads

Optional Universal Motor Disconnect Contact

Disconnects large motor via control circuit for adjustable period prior to transfer.

Accessory R50 Phase Monitor

Compares phase angle between sources and prevents transfer until phases align.

Series CTSD

Offers delayed transition on transfer switches 40A and above.

Series CTSCT

Combines CTSD operation with engineered control for momentary paralleling.

Standard Features (MSTD Package)

Optional Packages

Exerciser (MEXE) Package

Includes STDS Functions, A1/A1E, A3/A4, CDP, Q2, R16.

Controls (MCON) Package

Includes EXES Functions, Q3, Q7, T3/W3, UMD.

Sensing (MSEN) Package

Includes EXES Functions, Normal Source Over voltage sensing, Q7, S12P.

Special (MSPE) Package

Includes CONS Functions, SENS Functions, S5P.

Switchgear (MPSG) Package

Includes SPES Functions, A3/A4 Contacts, R15/R15D, S12/P.

CTS Series Accessory Definitions

CTS Series Accessory Group Matrix

CTS Series Dimensional Specifications

AL-CU UL Listed Solderless Screw-Type Terminals for External Power Connections