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CTG Series Automatic Transfer Switch
Features
- Ratings 40 to 3000 amps (2, 3 or 4 poles)
- UL 1008 listed at 480 VAC
- CSA certified at 600 VAC (200-225 amp
- 480V) - IEC listed at 480 V
- Double throw, mechanically interlocked contactor mechanism
- Electrically operated, mechanically held
- Designed for emergency and standby applications
- 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
Technical Summary | |
---|---|
Transfer Type | Open transition |
Rating Range | 40-3000A |
Switch Type | Contactor based |
Standard Equipment
- 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
- Auxiliary 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
Optional Equipment
- 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