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Instruction Booklet
Page 10 Effective: April 2006
ATC-300 Automatic
Transfer Switch Controller
2.4 Specification Summary
Table 1. ATC-300 Controller Specifications
Input Control Voltage 65 to 145 Vac 50/60 Hz
Voltage Measurements of Source 1 VAB Source 2 VAB
Source 1 VBC Source 2 VBC
Source 1 VCA Source 2 VCA
Voltage Measurement Range 0 to 790 Vac RMS (50/60 Hz)
Voltage Measurement Accuracy ± 1% of Full Scale
Frequency Measurements of Source 1 and Source 2
Frequency Measurement Range 40 Hz to 70 Hz
Frequency Measurement Accuracy ± 0.3 Hz Over the Measurement Range
Undervoltage Dropout Range:
Breaker/Switch Style ATS
Contactor Style ATS
50 to 97% of the Nominal System Voltage
78 to 97% of the Nominal System Voltage
Undervoltage Pickup Range:
Breaker/Switch Style ATS
Contactor Style ATS
(Dropout +2%) to 99% of the Nominal System Voltage
(Dropout +2%) to 99% of the Nominal System Voltage
Overvoltage Dropout Range:
Breaker/Switch Style ATS
Contactor Style ATS
105 to 120% of the Nominal System Voltage
105 to 110% of the Nominal System Voltage
Overvoltage Pickup Range:
Breaker/Switch Style ATS
Contactor Style ATS
103% to (Dropout -2%) of the Nominal System Voltage
103% to (Dropout -2%) of the Nominal System Voltage
Underfrequency Dropout Range:
Breaker/Switch Style ATS
Contactor Style ATS
90 to 97% of the Nominal System Frequency
90 to 97% of the Nominal System Frequency
Underfrequency Pickup Range:
Breaker/Switch Style ATS
Contactor Style ATS
(Dropout +1Hz) to 99% of the Nominal System Frequency
(Dropout +1Hz) to 99% of the Nominal System Frequency
Overfrequency Dropout Range:
Breaker/Switch Style ATS
Contactor Style ATS
103 to 110% of the Nominal System Frequency
103 to 105% of the Nominal System Frequency
Overfrequency Pickup Range:
Breaker/Switch Style ATS
Contactor Style ATS
101% to (Dropout -1Hz) of the Nominal System Frequency
101% to (Dropout -1Hz) of the Nominal System Frequency
Operating Temperature Range -20 to +70°C (-4 to +158°F)
Storage Temperature Range -30 to +85°C (-22 to +185°F)
Operating Humidity 0 to 95% Relative Humidity (Non-condensing)
Operating Environment Resistant to Ammonia, Methane, Nitrogen, Hydrogen, and Hydrocarbons
Generator Start Relay 5 A, 1/6 HP @ 250 Vac
5 A @ 30 Vdc with a 150 W Maximum Load
K1, K2, Pretransfer, Alarm Relays
K3, K4
10 A, 1-3 HP @ 250 Vac
10 A @ 30 Vdc
Applicable Testing UL Recognized Component
Meets Intent of UL 991, 1008
Meets IEC 1000-4-2, 1000-4-3, 1000-4-4, 1000-4-5, 1000-4-6, 1000-4-11
Meets CISPR 11, Class A
Complies with FCC Part 15, Class A
Enclosure Compatibility NEMA 1, NEMA 3R, and NEMA 12
UV Resistant ATC-300 Faceplate
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