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Ziegler CAT


The ATC-100 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.The ATC provides both fixed and jumper-selectable settings to allow for a range of applications. It operates from all system voltages between 120 and 480 Vac, single-phase and three phase at 50 or 60 Hz. The ATC-100 monitors the condition of the three-phase line to line voltage and the frequency of both the utility and generator power sources. It can also be set up for single-phase operation. The ATC-100 provides the necessary intelligence to ensure that the transfer switch operates properly through a series of selectable sensing and timing functions.

Brand: Caterpillar



  • Technical Summary
    Rating Range 120 to 480V, single phase and three phase @ 50/60 Hz
    Transfer Type Switch application dependent
    Switch Type Switch application dependent
  • ATC Controller Specifications
    Input Control Voltage 95 to 145 Vac 50/60 Hz
    Voltage Measurements of Utility VAB generator VAB
    VBC generator VBC
    VCA generator VCA
    Voltage Measurement Range 0 to 575 Vac rms (50/60 Hz)
    Voltage Measurement Accuracy ± 1% of full scale
    Frequency Measurements Of Generator
    Frequency Measurement Range 40 Hz to 70 Hz
    Frequency Measurement Accuracy ±0.3 Hz over the measurement range
    Undervoltage Dropout 80% of the nominal system voltage
    Undervoltage Pickup 90% of the nominal system voltage
    Underfrequency Dropout Range 90% of the nominal system frequency
    Underfrequency Pickup Range 95% of the nominal system frequency
    Overfrequency Dropout Range 115% of the nominal system frequency
    Overfrequency Pickup Range 110% 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 (noncondensing)
    Operating Environment Resistant to ammonia, methane, nitrogen, hydrogen and hydrocarbons
    Generator Start Relay 5A, 1/6 hp @ 250 Vac Vac 5A @ 30 Vdc with a 150W maximum load
    K1, K2 Relays
    10A, 1–3 hp @ 250 Vac

    10A@30 Vdc
    Applicable Testing UL-recognized component
    UL 1008, UL 991 Environmental IEC 61000-4-2, 61000-4-3, 61000-4-4,
    Applicable Testing Continued 61000-4-5, 61000-4-6, 61000-4-11
    CISPR 11, Class B
    FCC Part 15, Class B
    CSS 22.2-178
    Enclosure Compatibility NEMA 1, NEMA 3R and NEMA 12
    UV-resistant ATC-100 faceplate