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The ATC-900 C9ontroller is a programmable microprocessor-based monitoring device for use on Cat transfer switches. Data access and programming operations are performed using the ATC-900’s touch sensitive function buttons in conjunction with an easy-to-read illuminated alphanumeric LED display. Both the functional buttons and the display window are part of the device’s door mounted front panel. A built in Help button provides user assistance in the form of message displays.

The communication option permits monitoring and control of several transfer switches, locally or remotely from a single point. Depending on the application, the user can customize the ATC-800 to meet the particular application. The ATC-900 is equipped to display historical information either via the front panel or over mod bus communications to a personal computer. Source 1 and Source 2 run time, available time and connect time are available, as well as load energized time, number of transfers, date, time and reason for the last 16 transfers.

Technical Summary

Rating Range

120 to 600V, single phase and three phase @ 50/60 Hz

Transfer Type

Switch application dependent

Switch Type

Switch application dependent

ATC Controller Specifications

Input Control Voltage

120Vac (50/60 Hz) (operating range 65 to 160 Vac)

Voltage Measurements of Utility

Source 1, Source 2 and Load
(VAB, VBC, VCA for Three Phase System)

Voltage Measurement Range

0 to 700 Vac

Voltage Measurement Accuracy

+/-1% of full scale

Frequency Measurements Of

Source 1 and Source 2

Frequency Measurement Range

40 Hz to 80 Hz

Frequency Measurement Accuracy

+/- 0.1 Hz

Undervoltage Dropout

Breaker Style 50 to 97% of Nominal System Voltage
Contactor Style - 78 to 97%

Undervoltage Pickup

(Dropout +2%) to 99% of Nominal System Voltage

Underfrequency Dropout Range

90 to 97% of Nominal System Frequency

Underfrequency Pickup Range

(Dropout +1 Hz) to 99% of Nominal System Frequency

Overfrequency Dropout Range

103 to 110% of Nominal System Frequency

Overfrequency Pickup Range

101% to (Dropout +1 Hz) of nominal system frequency

Operating Temperature Range

-20 to 70 degree C (-4 to +158 degree F)

Operating Humidity

Up to 90% Relative Humidity (non-condensing)

Enclosure Compatibility

  • NEMA 12 (std mounting)
  • NEMA 3R
  • UV Resistant Faceplate
  • Ratings

    System Voltage Application

    120 to 600 Vac (50/60 Hz) (single or three phase)

    Standard Equipment:

    Optional Equipment:

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