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CTG Series Automatic Transfer Switch
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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
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Technical Summary
Rating Range
40-3000ASwitch Type
Contactor basedTransfer Type
Open transition
Standard Features
- 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
Options
- Service entrance configuration
- 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)
- Network communications interface card (LonWorks / ModBus)
- 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