CAT® ATC MOLDED CASE CIRCUIT BREAKER AND MOLDED CASE SWITCH AUTOMATIC TRANSFER SWITCH Cat transfer switches are designed for a variety of standby power applications. They provide flexibility, reliability and value in a compact package. The open transition breaker-based Automatic Transfer Switch (ATS) will provide fully functioning transfer in applications where a momentary loss of power is acceptable on retransfer from emergency to normal power supply. The Cat Open Transition MCCB & MCS types of ATS also permits periodic testing of the emergency source without interrupting power to the loads and are available from 30 to 1000 amperes. microprocessor-based controller Voltage and frequency sensing Multiple field programmable time delays Switch position indication Source availability indication Safe manual transfer under load Source 1 and Source 2 auxiliary contacts Programmable plant exerciser System test pushbutton Load Shed from emergency (ATC-800 only) Mimic diagram • M e chanical (cable) and electrical interlocking to prevent paralleling of sources • Safe manual operation under full load with permanently affixed operating handle • Ambient temperature range: -40C to 40C (-40F to 104F) • Operating temperature range: -20C to 70C (-4F to 158F) • Operating humidity: up to 90% • Relative humidity (non-condensing) • Frequency sensing on Source 1 and 2 • True RMS three phase voltage sensing on Source 1, Source 2 and load.

OPTIONS • Suitable for service entrance • Integral overcurrent protection • 2- or 4-position test switch • Multi meter options available • Selectable Automatic or Non-Automatic operation • Space heaters (recommended for use in NEMA 3R enclosures • Load sequencing contacts • Surge suppression • Remote communications • Controller availability: ATC-100, ATC-300+, or ATC-800 • Field selectable, multi ratio, control voltage transformer 50/60 Hz • Communications for the ATC-300+ Controller via RS-232 or Modbus through an integrated RS-485 port OPTIONAL DELAYED TRANSITION INCLUDES: • Time Delay Neutral •...

UL 991 UL standards for safety tests for safety-related controls employing solid-state devices UL 1008 Dielectric test (endurance, withstand, etc.) IEEE® 472 (ANSI C37.90A) Ringing wave immunity/voltage surge test EN55022 (CISPR11): Conducted and radiated emissions EN61000-4-2 Class B Level 4 ESD immunity test EN61000-4-3 (ENV50140) radiated RF, electromagnetic field immunity test EN61000-4-4 Electrical fast transient/burst immunity test EN61000-4-5 IEEE C62.41: Surge immunity test EN61000-4-6 (ENV50141) Conducted immunity test EN61000-4-11 Voltage dips and interruption immunity FCC Part 15 Conducted/radiated...

All dimensions and weights are approximate and subject to change without notice and are not for construction use.

*When an open enclosure is ordered an optional bus provision is available as an option on the line side and/or load connection **Standard Terminals - ( ) indicate the quantity of supplied terminals per pole. Information contained in this publication may be considered confidential. Discretion is recommended when distributing. Materials and specifications are subject to change without notice. CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow,” the “Power Edge” trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without...