Cat® Service Entrance Rated (SER) automatic transfer switches (ATS) are designed to provide standby power emergency power to entire installation loads to protect against utility power interruption; yet allow the ATS to be as close as possible to the point of service entrance. By safely and in code compliance, integrating the necessary overcurrent protection and service disconnecting means into the automatic transfer switch, a single installation can be made at the service entrance. This design eliminates the need for a separate upstream fault protection and respective interconnections, which in turn reduces installation space, time, and cost. Breaker-based Service Entrance Rated transfer switches are available from 30A to 5000A.
ATC Service Entrance Rated MCCB & Power Breaker Based ATS Standard Equipment
Controls and Wiring
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.
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.
ATC Service Entrance Rated MCCB & Power Breaker Based ATS Optional Equipment
Open, closed or delayed transition
Integral overcurrent protection
4-position test switch
Multi-meter options available
Selectable automatic or non-automatic operation
Load sequencing contacts
Seismic Zone 4 Qualified (BOCA, CBC, IBC, UBC and OSHPD)
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
Pre-transfer signal with 1 N.O. and 1 N.C. contacts