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The Cat® CTG Series Automatic Transfer Switches (ATS) are pre-configured for applications requiring the dependability and ease of operation found in a full feature power contactor type transfer switch. CTG switches are equipped with the next generation MX150 microprocessor panel, which controls the operation and displays the status of the transfer switch's position, timers and available sources. As an embedded digital controller, the MX150 offers high reliability and ease of unattended operation across a range of applications.
Benefits
MX150
Controller
with non-volatile memory-clock battery backup not required for standard switch operation
The Cat�
CTG Serie
Automatic Transfer Switches (ATS)
are pre-configured for applications requiring the dependability and ease of operation found in a full feature power contactor type transfer switch
Available in standard open transition (CTG)or delayed transition (CTGD) models
Ringing wave immunity per IEEE 472 (ANSI C37.90A
Conducted and Radiated Emissions per EN55022 Class B (CISPR 11) (Exceeds EN55011 & MILSTD 461 Class 3)
ESD immunity test per EN61000-4-2 (Level 4)
Radiated RF, electromagnetic field immunity test per EN61000-4-3 (ENV50140) 10v/m
Electrical fast transient/burst immunity test per EN61000-4-4
Radiated RF, electromagnetic field immunity
Surge immunity test per EN61000-4-5 IEEE C62.41 (1.2 X 50 ms, 5 & 8 kV)
Conducted immunity test per EN61000-4-6 (ENV50141)
Voltage dips and interruption immunity EN61000-4-11
Seismic Compliance to IEEE-693-2005 and IBC-2003
Design and Construction Features
Close differential 3 phase under-voltage sensing of the normal source - factory standard setting 90% pickup, 80% dropout (adjustable);under frequency sensing of the normal source factory setting 95% pickup (adjustable)
Voltage and frequency sensing of the emergency source - factory standard setting 90% pickup voltage, 95% pickup frequency (adjustable)
Test switch (fast test/load/no load) to simulate normal source failure - automatically bypassed should the emergency source fail
Type 1 enclosure is standard - also available in open style or Types 3R, 4, 4X, or 12
Auxiliary Contact: Closed when the switch is in the normal position (Additional contacts optional)
Time Delay to Engine Start: Standard setting 3 seconds, adjustable 0-10 seconds
Peak Shave/Remote Load Test: Input for peak shave or remote load test; includes automatic return to normal if emergency source fails and normal is present; 120 VAC
Indicating LED Pilot Lights: -Switch in emergency position -Switch in normal position - Normal source available -Emergency source available
When specified for use with a CTGD Series delayed transition switch, the control panel also includes the following:
Event Log OD 16 Event that track date, time, reason and action taken
Time Delay on Retransfer to Normal: To delay retransfer to normal source (immediate retransfer on generator set failure); standard setting 30 minutes, adjustable 0-60 minutes
7, 14, 28 day interval timed exerciser, pushbutton/timer operation
Test Switch - Momentary
In-Phase Monitor, self-adjusting (Not available on CTGD models)
Auxiliary Contact: Closed when the switch is in the emergency position (Additional contacts optional)
Push button Bypass of time delay and normal emergency
Voltage and Frequency Indication for S1 and S2
Engine Start Contact
MX150 Control Panel
LED/LCD indicators for ease of viewing and long life
Time Delay for Engine Cool Down: Allows engine to run unloaded after switch retransfer to normal; standard setting 5 minutes, adjustable 0-60 minutes
Inputs opto-isolated for high electrical immunity to transients and noise
Built-in diagnostics with LCD display for immediate troubleshooting
Nonvolatile memory (exerciser battery backup not required for standard operation)
Processor and digital circuitry isolated from line voltage
Communications header for network interface
Time Delay on Transfer to Emergency: To delay transfer to emergency after verifying emergency source available; standard setting 1 second, adjustable 0-5 minutes
Timer and voltage/frequency settings adjustable without disconnection from power sources
CTG Series Automatic Transfer Switch Optional Equipment
Auxiliary Contacts: Closed when the transfer switch is in Source 1 position
Elevator Pre-Signal Auxiliary Contacts: Open 0-60 seconds prior to transfer to either direction, re-closes after transfer
Space heater and thermostat
Auxiliary Contact, operates on Source 1 line failure
Note:For applications requiring additional options or other configurations, see the CTS Series fully configurable transfer switch.
Auxiliary Contact, operates on Source 2 availability
Plant Exerciser, clock type (load/no load): Allows the generator to start and run unloaded or to simulate a power failure, start generator and run under load (7-14-28-365 days, user selectable)
Universal Motor Load Disconnect Circuit: Auxiliary Contact opens 0-60 seconds prior to transfer in either direction, re-closes after transfer. Can be configured by end user for Pre-transfer, Post-transfer, or both.
Auxiliary Contacts: Closed when the transfer switch is in Source 2 position
Power Measurement Meters
Maintained Test Switch
Disconnect Switch: Permits transfer in “AUTO” position and inhibits transfer in “INHIBIT” position. (Standard 800A and above)
Lockable, see-through cover for ATS controller
Voltage Imbalance Monitor (Three Phase)
Maintained Test Switch w/Keypad
See how CTG Series Automatic Transfer Switch compares against frequently compared products.
Electric PowerCTG Series Automatic Transfer Switch
Transfer Type
Open transition
Open transition
Rating Range
40-3000A
40-3000A
Switch Type
Contactor based
Contactor based
Selected Model
Electric PowerCTE Series Automatic Transfer Switch
Get value and reliability that can only come from Caterpillar. Our new Cat® GC diesel generator sets offer the availability you need to keep your business running during a power outage.
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