ATC Contactor-Based Automatic Transfer Switch
At a Glance
Rating Range
40-1600A
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Transfer Type
Open / Closed Transition
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Switch Type
Contactor Based
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Control Power
Wall Mount 40-600A 2 or 3 Pole Floor Standing 600A 4 Pole & 800-1200A 2, 3, or 4 Pole
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Overview
Cat® transfer switches are designed for a variety of standby power applications. They provide flexibility, reliability and value in a compact package. The open and delayed transition contactor-based Automatic Transfer Switch (ATS) provides fully functioning transfer in Applications where a momentary loss of power is acceptable during transfer and retransfers between normal and emergency power supply.
The closed transition contactor-based ATS is designed to Meet application requirements where emergency back up power is required with no momentary loss of power by connecting both sources before the transfer occurs. Closed transition also permits periodic testing of the emergency power source without interrupting power to the loads.
Technical Summary
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Rating Range |
40-1600A |
Transfer Type |
Open / Closed Transition |
Switch Type |
Contactor Based |
Ratings
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Control Power |
Wall Mount 40-600A 2 or 3 Pole Floor Standing 600A 4 Pole & 800-1200A 2, 3, or 4 Pole |
Two-Position Contactors |
Two-position contactors 40-400A |
Three-Position Contactors |
Three-position contactors 40-1200A |
System Voltage Application |
Up to 600 Vac, 50/60 Hz |
Applicable Testing |
UL 1008 listed, CSA C22.2 No. 178 certified, IBC 2006, CBC 2007 and OSHPD |
Standard Equipment:
Contact Composition
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Caterpillar utilizes silver composition contacts designed to meet the stringent requirements of UL 1008. All contactors are designed so that the contacts can be visually inspected without major disassembly and are protected by arcing contacts.
Controls And Wiring
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All controls relays and industrial grade relays are totally encapsulated to minimize exposure to dust and dirt. Lugs are 90º rated and all control wire is #16 AWG, type XLPE with a 125º temperature rating.
Enclosure
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Durable powder-coated steel NEMA 1, 3R or 12 enclosures with three door hinges to ensure proper support of the door and door mounted devices. The hinges have removable hinge pins to facilitate door removal for easy wall mounting or service and are supplied with pad-lockable latches.
Optional Equipment:
Available Options
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2- or 4-position test switch
Controller availability: ATC-100, ATC-300+,and ATC-800
Delayed transition or closed transition
Multi-meter options available
Surge suppression
Space heaters
Field selectable, multi ratio, control voltage transformer 50/60 Hz
Selectable automatic or non-automatic operation
Remote communications
Load shed from emergency
Optional Delayed Transition Includes:
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Pre-transfer signal with 1 N.O. and 1 N.C. contacts
Time delay neutral