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More Comfort – More Performance – More Versatility

  • The ATC-300+ is a comprehensive and multifunctional microprocessor-based ATS controller

  • It is a Compact and self-contained panel-mounted device that is designed to replace traditional relay and solid-state logic panels.

Technical Summary

Rating Range 120 to 600V, single phase and three phase @ 50/60 Hz
Switch Type Switch application dependent
Transfer Type Switch application dependent

ATC Controller Specifications

Applicable Testing UL-recognized component
Meets intent of UL 991 & UL 1008
Meets IEC 1000-4-2, 1000-4-3, 1000-4-4
Applicable Testing Continued 1000-4-5, 1000-4-6, 1000-4-11
CISPR 11, Class A
FCC Part 15, Class A
CSS 22.2-178
Enclosure Compatibility NEMA 1, NEMA 3R and NEMA 12
UV-resistant ATC-300+ faceplate
Frequency Measurement Accuracy +/- 0.1 Hz
Frequency Measurement Range 40 Hz to 70 Hz
Frequency Measurements Of Source 1 and Source 2
Generator Start Relay 5A, 1/6 hp @ 250 Vac Vac 5A @ 30 Vdc with a 150W maximum load
Input Control Voltage 65 to 145 Vac 50/60 hZ
K1, K2 Relays
10A, 1-3 hp @ 250 Vac

10A@30 Vdc
Operating Environment Resistant to ammonia, methane, nitrogen,hydrogen and hydrocarbons
Operating Humidity 0 to 95% relative humidity (noncondensing)
Operating Temperature Range -20 to 70 degree C (-4 to +158 degree F)
Overfrequency Dropout Range 103 to 110% of the nominal system frequency
Overfrequency Pickup Range 101% to (dropout - 1 Hz) of the nominal system frequency
Storage Temperature Range -30 to 85 degree C (-22 to +185 degree F)
Underfrequency Dropout Range 90 to 97% of the nominal system frequency
Underfrequency Pickup Range (Dropout +1 Hz) to 99% of the nominal system frequency
Undervoltage Dropout 50% to 90% of nominal voltage
Undervoltage Pickup (Dropout +2%) to 99% of the nominal system voltage
Voltage Measurement Accuracy +/-2% of nominal input voltage
Voltage Measurement Range 0 to 790 VAC rms (50/60 Hz)
Voltage Measurements of Utility Source 1 VAB Source 2 VAB
Source 1 VAC Source 2 VBC
Source 1 VCA Source 2 VCA

Download resources

ATC-300+ Controller Spec Sheet
Cat Gensets Rating Guide

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